[v3,1/6] Support Mips architecture
Commit Message
From: Ying Huang <ying.huang@oss.cipunited.com>
Signed-off-by: Ying Huang <ying.huang@oss.cipunited.com>
---
backends/Makefile.am | 6 +-
backends/mips_init.c | 52 ++++
backends/mips_reloc.def | 93 +++++++
backends/mips_symbol.c | 63 +++++
libebl/eblopenbackend.c | 2 +
libelf/libelfP.h | 3 +
tests/libelf.h | 541 ++++++++++++++++++++++++++++++++++++++++
7 files changed, 758 insertions(+), 2 deletions(-)
create mode 100644 backends/mips_init.c
create mode 100644 backends/mips_reloc.def
create mode 100644 backends/mips_symbol.c
create mode 100644 tests/libelf.h
Comments
Hi Mark,
Could you please review these patches, I have splited patch v2 1/5 to patch v3 1/6 and 2/6.
Thanks,
Ying
在 2024/3/5 17:51, Ying Huang 写道:
> From: Ying Huang <ying.huang@oss.cipunited.com>
>
> Signed-off-by: Ying Huang <ying.huang@oss.cipunited.com>
> ---
> backends/Makefile.am | 6 +-
> backends/mips_init.c | 52 ++++
> backends/mips_reloc.def | 93 +++++++
> backends/mips_symbol.c | 63 +++++
> libebl/eblopenbackend.c | 2 +
> libelf/libelfP.h | 3 +
> tests/libelf.h | 541 ++++++++++++++++++++++++++++++++++++++++
> 7 files changed, 758 insertions(+), 2 deletions(-)
> create mode 100644 backends/mips_init.c
> create mode 100644 backends/mips_reloc.def
> create mode 100644 backends/mips_symbol.c
> create mode 100644 tests/libelf.h
>
> diff --git a/backends/Makefile.am b/backends/Makefile.am
> index bbb2aac7..b946fd30 100644
> --- a/backends/Makefile.am
> +++ b/backends/Makefile.am
> @@ -37,7 +37,7 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \
> noinst_LIBRARIES = libebl_backends.a libebl_backends_pic.a
>
> modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \
> - m68k bpf riscv csky loongarch arc
> + m68k bpf riscv csky loongarch arc mips
>
> i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \
> i386_retval.c i386_regs.c i386_auxv.c \
> @@ -102,12 +102,14 @@ loongarch_SRCS = loongarch_init.c loongarch_symbol.c loongarch_cfi.c \
>
> arc_SRCS = arc_init.c arc_symbol.c
>
> +mips_SRCS = mips_init.c mips_symbol.c
> +
> libebl_backends_a_SOURCES = $(i386_SRCS) $(sh_SRCS) $(x86_64_SRCS) \
> $(ia64_SRCS) $(alpha_SRCS) $(arm_SRCS) \
> $(aarch64_SRCS) $(sparc_SRCS) $(ppc_SRCS) \
> $(ppc64_SRCS) $(s390_SRCS) \
> $(m68k_SRCS) $(bpf_SRCS) $(riscv_SRCS) $(csky_SRCS) \
> - $(loongarch_SRCS) $(arc_SRCS)
> + $(loongarch_SRCS) $(arc_SRCS) $(mips_SRCS)
>
> libebl_backends_pic_a_SOURCES =
> am_libebl_backends_pic_a_OBJECTS = $(libebl_backends_a_SOURCES:.c=.os)
> diff --git a/backends/mips_init.c b/backends/mips_init.c
> new file mode 100644
> index 00000000..cedd08ca
> --- /dev/null
> +++ b/backends/mips_init.c
> @@ -0,0 +1,52 @@
> +/* Initialization of MIPS specific backend library.
> + Copyright (C) 2024 CIP United Inc.
> + This file is part of elfutils.
> +
> + This file is free software; you can redistribute it and/or modify
> + it under the terms of either
> +
> + * the GNU Lesser General Public License as published by the Free
> + Software Foundation; either version 3 of the License, or (at
> + your option) any later version
> +
> + or
> +
> + * the GNU General Public License as published by the Free
> + Software Foundation; either version 2 of the License, or (at
> + your option) any later version
> +
> + or both in parallel, as here.
> +
> + elfutils is distributed in the hope that it will be useful, but
> + WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + General Public License for more details.
> +
> + You should have received copies of the GNU General Public License and
> + the GNU Lesser General Public License along with this program. If
> + not, see <http://www.gnu.org/licenses/>. */
> +
> +#ifdef HAVE_CONFIG_H
> +# include <config.h>
> +#endif
> +
> +#define BACKEND mips_
> +#define RELOC_PREFIX R_MIPS_
> +#include "libebl_CPU.h"
> +#include "libelfP.h"
> +
> +#define RELOC_TYPE_ID(type) ((type) & 0xff)
> +
> +/* This defines the common reloc hooks based on mips_reloc.def. */
> +#include "common-reloc.c"
> +
> +Ebl *
> +mips_init (Elf *elf __attribute__ ((unused)),
> + GElf_Half machine __attribute__ ((unused)),
> + Ebl *eh)
> +{
> + /* We handle it. */
> + mips_init_reloc (eh);
> + HOOK (eh, reloc_simple_type);
> + return eh;
> +}
> diff --git a/backends/mips_reloc.def b/backends/mips_reloc.def
> new file mode 100644
> index 00000000..5120980c
> --- /dev/null
> +++ b/backends/mips_reloc.def
> @@ -0,0 +1,93 @@
> +/* List the relocation types for MIPS. -*- C -*-
> + Copyright (C) 2024 CIP United Inc.
> + This file is part of elfutils.
> +
> + This file is free software; you can redistribute it and/or modify
> + it under the terms of either
> +
> + * the GNU Lesser General Public License as published by the Free
> + Software Foundation; either version 3 of the License, or (at
> + your option) any later version
> +
> + or
> +
> + * the GNU General Public License as published by the Free
> + Software Foundation; either version 2 of the License, or (at
> + your option) any later version
> +
> + or both in parallel, as here.
> +
> + elfutils is distributed in the hope that it will be useful, but
> + WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + General Public License for more details.
> +
> + You should have received copies of the GNU General Public License and
> + the GNU Lesser General Public License along with this program. If
> + not, see <http://www.gnu.org/licenses/>. */
> +
> +/* NAME, REL|EXEC|DYN */
> +
> +
> +RELOC_TYPE (NONE, REL|EXEC|DYN)
> +RELOC_TYPE (16, REL|EXEC|DYN)
> +RELOC_TYPE (32, REL)
> +RELOC_TYPE (REL32, REL|EXEC|DYN)
> +RELOC_TYPE (26, REL|DYN)
> +RELOC_TYPE (HI16, REL)
> +RELOC_TYPE (LO16, REL|EXEC|DYN)
> +RELOC_TYPE (GPREL16, REL|EXEC|DYN)
> +RELOC_TYPE (LITERAL, REL|EXEC|DYN)
> +RELOC_TYPE (GOT16, REL|EXEC|DYN)
> +RELOC_TYPE (PC16, REL)
> +RELOC_TYPE (CALL16, REL)
> +RELOC_TYPE (GPREL32, REL)
> +RELOC_TYPE (SHIFT5, REL)
> +RELOC_TYPE (SHIFT6, REL)
> +RELOC_TYPE (64, REL)
> +RELOC_TYPE (GOT_DISP, REL)
> +RELOC_TYPE (GOT_PAGE, REL)
> +RELOC_TYPE (GOT_OFST, REL)
> +RELOC_TYPE (GOT_HI16, REL)
> +RELOC_TYPE (GOT_LO16, REL)
> +RELOC_TYPE (SUB, REL)
> +RELOC_TYPE (INSERT_A, REL)
> +RELOC_TYPE (INSERT_B, REL)
> +RELOC_TYPE (DELETE, REL)
> +RELOC_TYPE (HIGHER, REL)
> +RELOC_TYPE (HIGHEST, REL)
> +RELOC_TYPE (CALL_HI16, REL)
> +RELOC_TYPE (CALL_LO16, REL)
> +RELOC_TYPE (SCN_DISP, REL)
> +RELOC_TYPE (REL16, REL)
> +RELOC_TYPE (ADD_IMMEDIATE, REL)
> +RELOC_TYPE (PJUMP, REL)
> +RELOC_TYPE (RELGOT, REL)
> +RELOC_TYPE (JALR, REL)
> +RELOC_TYPE (TLS_DTPMOD32, DYN)
> +RELOC_TYPE (TLS_DTPREL32, REL)
> +RELOC_TYPE (TLS_DTPMOD64, DYN)
> +RELOC_TYPE (TLS_DTPREL64, REL)
> +RELOC_TYPE (TLS_GD, REL)
> +RELOC_TYPE (TLS_LDM, REL)
> +RELOC_TYPE (TLS_DTPREL_HI16, REL)
> +RELOC_TYPE (TLS_DTPREL_LO16, REL)
> +RELOC_TYPE (TLS_GOTTPREL, REL)
> +RELOC_TYPE (TLS_TPREL32, REL)
> +RELOC_TYPE (TLS_TPREL64, REL)
> +RELOC_TYPE (TLS_TPREL_HI16, REL)
> +RELOC_TYPE (TLS_TPREL_LO16, REL)
> +RELOC_TYPE (GLOB_DAT, REL)
> +RELOC_TYPE (PC21_S2, REL)
> +RELOC_TYPE (PC26_S2, REL)
> +RELOC_TYPE (PC18_S3, REL)
> +RELOC_TYPE (PC19_S2, REL)
> +RELOC_TYPE (PCHI16, REL)
> +RELOC_TYPE (PCLO16, REL)
> +RELOC_TYPE (COPY, REL)
> +RELOC_TYPE (JUMP_SLOT, REL)
> +RELOC_TYPE (PC32, REL)
> +RELOC_TYPE (EH, REL)
> +RELOC_TYPE (GNU_REL16_S2, REL)
> +RELOC_TYPE (GNU_VTINHERIT, REL)
> +RELOC_TYPE (GNU_VTENTRY, REL)
> diff --git a/backends/mips_symbol.c b/backends/mips_symbol.c
> new file mode 100644
> index 00000000..f2a46495
> --- /dev/null
> +++ b/backends/mips_symbol.c
> @@ -0,0 +1,63 @@
> +/* MIPS specific symbolic name handling.
> + Copyright (C) 2024 CIP United Inc.
> + This file is part of elfutils.
> +
> + This file is free software; you can redistribute it and/or modify
> + it under the terms of either
> +
> + * the GNU Lesser General Public License as published by the Free
> + Software Foundation; either version 3 of the License, or (at
> + your option) any later version
> +
> + or
> +
> + * the GNU General Public License as published by the Free
> + Software Foundation; either version 2 of the License, or (at
> + your option) any later version
> +
> + or both in parallel, as here.
> +
> + elfutils is distributed in the hope that it will be useful, but
> + WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + General Public License for more details.
> +
> + You should have received copies of the GNU General Public License and
> + the GNU Lesser General Public License along with this program. If
> + not, see <http://www.gnu.org/licenses/>. */
> +
> +#ifdef HAVE_CONFIG_H
> +# include <config.h>
> +#endif
> +
> +#include <system.h>
> +
> +#include <elf.h>
> +#include <stddef.h>
> +#include <string.h>
> +#include <stdio.h>
> +#define BACKEND mips_
> +#include "libebl_CPU.h"
> +#include "libelfP.h"
> +
> +/* Check for the simple reloc types. */
> +Elf_Type
> +mips_reloc_simple_type (Ebl *ebl, int type,
> + int *addsub __attribute__ ((unused)))
> +{
> + int typeNew = type;
> + if(ebl->elf->class == ELFCLASS64)
> + typeNew = ELF64_MIPS_R_TYPE1(type);
> + switch (typeNew)
> + {
> + case R_MIPS_64:
> + return ELF_T_XWORD;
> + case R_MIPS_32:
> + return ELF_T_WORD;
> + case R_MIPS_16:
> + return ELF_T_HALF;
> +
> + default:
> + return ELF_T_NUM;
> + }
> +}
> diff --git a/libebl/eblopenbackend.c b/libebl/eblopenbackend.c
> index 084a1544..a5f7467a 100644
> --- a/libebl/eblopenbackend.c
> +++ b/libebl/eblopenbackend.c
> @@ -57,6 +57,7 @@ Ebl *riscv_init (Elf *, GElf_Half, Ebl *);
> Ebl *csky_init (Elf *, GElf_Half, Ebl *);
> Ebl *loongarch_init (Elf *, GElf_Half, Ebl *);
> Ebl *arc_init (Elf *, GElf_Half, Ebl *);
> +Ebl *mips_init (Elf *, GElf_Half, Ebl *);
>
> /* This table should contain the complete list of architectures as far
> as the ELF specification is concerned. */
> @@ -154,6 +155,7 @@ static const struct
> { csky_init, "elf_csky", "csky", 4, EM_CSKY, ELFCLASS32, ELFDATA2LSB },
> { loongarch_init, "elf_loongarch", "loongarch", 9, EM_LOONGARCH, ELFCLASS64, ELFDATA2LSB },
> { arc_init, "elf_arc", "arc", 3, EM_ARCV2, ELFCLASS32, ELFDATA2LSB },
> + { mips_init, "elf_mips", "mips", 4, EM_MIPS, 0, 0 },
> };
> #define nmachines (sizeof (machines) / sizeof (machines[0]))
>
> diff --git a/libelf/libelfP.h b/libelf/libelfP.h
> index ed061abb..bdd2cc6a 100644
> --- a/libelf/libelfP.h
> +++ b/libelf/libelfP.h
> @@ -617,4 +617,7 @@ extern void __libelf_reset_rawdata (Elf_Scn *scn, void *buf, size_t size,
> #define INVALID_NDX(ndx, type, data) \
> unlikely ((data)->d_size / sizeof (type) <= (unsigned int) (ndx))
>
> +#define ELF64_MIPS_R_TYPE1(i) ((i) & 0xff)
> +#define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff)
> +#define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff)
> #endif /* libelfP.h */
> diff --git a/tests/libelf.h b/tests/libelf.h
> new file mode 100644
> index 00000000..d3f057b4
> --- /dev/null
> +++ b/tests/libelf.h
> @@ -0,0 +1,541 @@
> +/* Interface for libelf.
> + Copyright (C) 1998-2010, 2015 Red Hat, Inc.
> + This file is part of elfutils.
> +
> + This file is free software; you can redistribute it and/or modify
> + it under the terms of either
> +
> + * the GNU Lesser General Public License as published by the Free
> + Software Foundation; either version 3 of the License, or (at
> + your option) any later version
> +
> + or
> +
> + * the GNU General Public License as published by the Free
> + Software Foundation; either version 2 of the License, or (at
> + your option) any later version
> +
> + or both in parallel, as here.
> +
> + elfutils is distributed in the hope that it will be useful, but
> + WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + General Public License for more details.
> +
> + You should have received copies of the GNU General Public License and
> + the GNU Lesser General Public License along with this program. If
> + not, see <http://www.gnu.org/licenses/>. */
> +
> +#ifndef _LIBELF_H
> +#define _LIBELF_H 1
> +
> +#include <stdint.h>
> +#include <sys/types.h>
> +
> +/* Get the ELF types. */
> +#include <elf.h>
> +
> +#ifndef SHF_COMPRESSED
> + /* Older glibc elf.h might not yet define the ELF compression types. */
> + #define SHF_COMPRESSED (1 << 11) /* Section with compressed data. */
> +
> + /* Section compression header. Used when SHF_COMPRESSED is set. */
> +
> + typedef struct
> + {
> + Elf32_Word ch_type; /* Compression format. */
> + Elf32_Word ch_size; /* Uncompressed data size. */
> + Elf32_Word ch_addralign; /* Uncompressed data alignment. */
> + } Elf32_Chdr;
> +
> + typedef struct
> + {
> + Elf64_Word ch_type; /* Compression format. */
> + Elf64_Word ch_reserved;
> + Elf64_Xword ch_size; /* Uncompressed data size. */
> + Elf64_Xword ch_addralign; /* Uncompressed data alignment. */
> + } Elf64_Chdr;
> +
> + /* Legal values for ch_type (compression algorithm). */
> + #define ELFCOMPRESS_ZLIB 1 /* ZLIB/DEFLATE algorithm. */
> + #define ELFCOMPRESS_LOOS 0x60000000 /* Start of OS-specific. */
> + #define ELFCOMPRESS_HIOS 0x6fffffff /* End of OS-specific. */
> + #define ELFCOMPRESS_LOPROC 0x70000000 /* Start of processor-specific. */
> + #define ELFCOMPRESS_HIPROC 0x7fffffff /* End of processor-specific. */
> +#endif
> +
> +#ifndef ELFCOMPRESS_ZSTD
> + /* So ZSTD compression can be used even with an old system elf.h. */
> + #define ELFCOMPRESS_ZSTD 2 /* Zstandard algorithm. */
> +#endif
> +
> +#ifndef SHT_RELR
> + /* So RELR defines/typedefs can be used even with an old system elf.h. */
> + #define SHT_RELR 19 /* RELR relative relocations */
> +
> + /* RELR relocation table entry */
> + typedef Elf32_Word Elf32_Relr;
> + typedef Elf64_Xword Elf64_Relr;
> +
> + #define DT_RELRSZ 35 /* Total size of RELR relative relocations */
> + #define DT_RELR 36 /* Address of RELR relative relocations */
> + #define DT_RELRENT 37 /* Size of one RELR relative relocaction */
> +#endif
> +
> +#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
> +# define __nonnull_attribute__(...) __attribute__ ((__nonnull__ (__VA_ARGS__)))
> +# define __deprecated_attribute__ __attribute__ ((__deprecated__))
> +# define __pure_attribute__ __attribute__ ((__pure__))
> +# define __const_attribute__ __attribute__ ((__const__))
> +#else
> +# define __nonnull_attribute__(...)
> +# define __deprecated_attribute__
> +# define __pure_attribute__
> +# define __const_attribute__
> +#endif
> +
> +#if __GNUC__ < 4
> +#define __noreturn_attribute__
> +#else
> +#define __noreturn_attribute__ __attribute__ ((noreturn))
> +#endif
> +
> +#ifdef __GNUC_STDC_INLINE__
> +# define __libdw_extern_inline extern __inline __attribute__ ((__gnu_inline__))
> +#else
> +# define __libdw_extern_inline extern __inline
> +#endif
> +
> +/* Known translation types. */
> +typedef enum
> +{
> + ELF_T_BYTE, /* unsigned char */
> + ELF_T_ADDR, /* Elf32_Addr, Elf64_Addr, ... */
> + ELF_T_DYN, /* Dynamic section record. */
> + ELF_T_EHDR, /* ELF header. */
> + ELF_T_HALF, /* Elf32_Half, Elf64_Half, ... */
> + ELF_T_OFF, /* Elf32_Off, Elf64_Off, ... */
> + ELF_T_PHDR, /* Program header. */
> + ELF_T_RELA, /* Relocation entry with addend. */
> + ELF_T_REL, /* Relocation entry. */
> + ELF_T_SHDR, /* Section header. */
> + ELF_T_SWORD, /* Elf32_Sword, Elf64_Sword, ... */
> + ELF_T_SYM, /* Symbol record. */
> + ELF_T_WORD, /* Elf32_Word, Elf64_Word, ... */
> + ELF_T_XWORD, /* Elf32_Xword, Elf64_Xword, ... */
> + ELF_T_SXWORD, /* Elf32_Sxword, Elf64_Sxword, ... */
> + ELF_T_VDEF, /* Elf32_Verdef, Elf64_Verdef, ... */
> + ELF_T_VDAUX, /* Elf32_Verdaux, Elf64_Verdaux, ... */
> + ELF_T_VNEED, /* Elf32_Verneed, Elf64_Verneed, ... */
> + ELF_T_VNAUX, /* Elf32_Vernaux, Elf64_Vernaux, ... */
> + ELF_T_NHDR, /* Elf32_Nhdr, Elf64_Nhdr, ... */
> + ELF_T_SYMINFO, /* Elf32_Syminfo, Elf64_Syminfo, ... */
> + ELF_T_MOVE, /* Elf32_Move, Elf64_Move, ... */
> + ELF_T_LIB, /* Elf32_Lib, Elf64_Lib, ... */
> + ELF_T_GNUHASH, /* GNU-style hash section. */
> + ELF_T_AUXV, /* Elf32_auxv_t, Elf64_auxv_t, ... */
> + ELF_T_CHDR, /* Compressed, Elf32_Chdr, Elf64_Chdr, ... */
> + ELF_T_NHDR8, /* Special GNU Properties note. Same as Nhdr,
> + except padding. */
> + ELF_T_RELR, /* Relative relocation entry. */
> + /* Keep this the last entry. */
> + ELF_T_NUM
> +} Elf_Type;
> +
> +/* Descriptor for data to be converted to or from memory format. */
> +typedef struct
> +{
> + void *d_buf; /* Pointer to the actual data. */
> + Elf_Type d_type; /* Type of this piece of data. */
> + unsigned int d_version; /* ELF version. */
> + size_t d_size; /* Size in bytes. */
> + int64_t d_off; /* Offset into section. */
> + size_t d_align; /* Alignment in section. */
> +} Elf_Data;
> +
> +
> +/* Commands for `...'. */
> +typedef enum
> +{
> + ELF_C_NULL, /* Nothing, terminate, or compute only. */
> + ELF_C_READ, /* Read .. */
> + ELF_C_RDWR, /* Read and write .. */
> + ELF_C_WRITE, /* Write .. */
> + ELF_C_CLR, /* Clear flag. */
> + ELF_C_SET, /* Set flag. */
> + ELF_C_FDDONE, /* Signal that file descriptor will not be
> + used anymore. */
> + ELF_C_FDREAD, /* Read rest of data so that file descriptor
> + is not used anymore. */
> + /* The following are extensions. */
> + ELF_C_READ_MMAP, /* Read, but mmap the file if possible. */
> + ELF_C_RDWR_MMAP, /* Read and write, with mmap. */
> + ELF_C_WRITE_MMAP, /* Write, with mmap. */
> + ELF_C_READ_MMAP_PRIVATE, /* Read, but memory is writable, results are
> + not written to the file. */
> + ELF_C_EMPTY, /* Copy basic file data but not the content. */
> + /* Keep this the last entry. */
> + ELF_C_NUM
> +} Elf_Cmd;
> +
> +
> +/* Flags for the ELF structures. */
> +enum
> +{
> + ELF_F_DIRTY = 0x1,
> +#define ELF_F_DIRTY ELF_F_DIRTY
> + ELF_F_LAYOUT = 0x4,
> +#define ELF_F_LAYOUT ELF_F_LAYOUT
> + ELF_F_PERMISSIVE = 0x8
> +#define ELF_F_PERMISSIVE ELF_F_PERMISSIVE
> +};
> +
> +/* Flags for elf_compress[_gnu]. */
> +enum
> +{
> + ELF_CHF_FORCE = 0x1
> +#define ELF_CHF_FORCE ELF_CHF_FORCE
> +};
> +
> +/* Identification values for recognized object files. */
> +typedef enum
> +{
> + ELF_K_NONE, /* Unknown. */
> + ELF_K_AR, /* Archive. */
> + ELF_K_COFF, /* Stupid old COFF. */
> + ELF_K_ELF, /* ELF file. */
> + /* Keep this the last entry. */
> + ELF_K_NUM
> +} Elf_Kind;
> +
> +
> +/* Archive member header. */
> +typedef struct
> +{
> + char *ar_name; /* Name of archive member. */
> + time_t ar_date; /* File date. */
> + uid_t ar_uid; /* User ID. */
> + gid_t ar_gid; /* Group ID. */
> + mode_t ar_mode; /* File mode. */
> + int64_t ar_size; /* File size. */
> + char *ar_rawname; /* Original name of archive member. */
> +} Elf_Arhdr;
> +
> +
> +/* Archive symbol table entry. */
> +typedef struct
> +{
> + char *as_name; /* Symbol name. */
> + size_t as_off; /* Offset for this file in the archive. */
> + unsigned long int as_hash; /* Hash value of the name. */
> +} Elf_Arsym;
> +
> +
> +/* Descriptor for the ELF file. */
> +typedef struct Elf Elf;
> +
> +/* Descriptor for ELF file section. */
> +typedef struct Elf_Scn Elf_Scn;
> +
> +
> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +/* Return descriptor for ELF file to work according to CMD. */
> +extern Elf *elf_begin (int __fildes, Elf_Cmd __cmd, Elf *__ref);
> +
> +/* Create a clone of an existing ELF descriptor. */
> + extern Elf *elf_clone (Elf *__elf, Elf_Cmd __cmd);
> +
> +/* Create descriptor for memory region. */
> +extern Elf *elf_memory (char *__image, size_t __size);
> +
> +/* Advance archive descriptor to next element. */
> +extern Elf_Cmd elf_next (Elf *__elf);
> +
> +/* Free resources allocated for ELF. */
> +extern int elf_end (Elf *__elf);
> +
> +/* Update ELF descriptor and write file to disk. */
> +extern int64_t elf_update (Elf *__elf, Elf_Cmd __cmd);
> +
> +/* Determine what kind of file is associated with ELF. */
> +extern Elf_Kind elf_kind (Elf *__elf) __pure_attribute__;
> +
> +/* Get the base offset for an object file. */
> +extern int64_t elf_getbase (Elf *__elf);
> +
> +
> +/* Retrieve file identification data. */
> +extern char *elf_getident (Elf *__elf, size_t *__nbytes);
> +
> +/* Retrieve class-dependent object file header. */
> +extern Elf32_Ehdr *elf32_getehdr (Elf *__elf);
> +/* Similar but this time the binary calls is ELFCLASS64. */
> +extern Elf64_Ehdr *elf64_getehdr (Elf *__elf);
> +
> +/* Create ELF header if none exists. */
> +extern Elf32_Ehdr *elf32_newehdr (Elf *__elf);
> +/* Similar but this time the binary calls is ELFCLASS64. */
> +extern Elf64_Ehdr *elf64_newehdr (Elf *__elf);
> +
> +/* Get the number of program headers in the ELF file. If the file uses
> + more headers than can be represented in the e_phnum field of the ELF
> + header the information from the sh_info field in the zeroth section
> + header is used. */
> +extern int elf_getphdrnum (Elf *__elf, size_t *__dst);
> +
> +/* Retrieve class-dependent program header table. */
> +extern Elf32_Phdr *elf32_getphdr (Elf *__elf);
> +/* Similar but this time the binary calls is ELFCLASS64. */
> +extern Elf64_Phdr *elf64_getphdr (Elf *__elf);
> +
> +/* Create ELF program header. */
> +extern Elf32_Phdr *elf32_newphdr (Elf *__elf, size_t __cnt);
> +/* Similar but this time the binary calls is ELFCLASS64. */
> +extern Elf64_Phdr *elf64_newphdr (Elf *__elf, size_t __cnt);
> +
> +
> +/* Get section at INDEX. */
> +extern Elf_Scn *elf_getscn (Elf *__elf, size_t __index);
> +
> +/* Get section at OFFSET. */
> +extern Elf_Scn *elf32_offscn (Elf *__elf, Elf32_Off __offset);
> +/* Similar but this time the binary calls is ELFCLASS64. */
> +extern Elf_Scn *elf64_offscn (Elf *__elf, Elf64_Off __offset);
> +
> +/* Get index of section. */
> +extern size_t elf_ndxscn (Elf_Scn *__scn);
> +
> +/* Get section with next section index. */
> +extern Elf_Scn *elf_nextscn (Elf *__elf, Elf_Scn *__scn);
> +
> +/* Create a new section and append it at the end of the table. */
> +extern Elf_Scn *elf_newscn (Elf *__elf);
> +
> +/* Get the section index of the extended section index table for the
> + given symbol table. */
> +extern int elf_scnshndx (Elf_Scn *__scn);
> +
> +/* Get the number of sections in the ELF file. If the file uses more
> + sections than can be represented in the e_shnum field of the ELF
> + header the information from the sh_size field in the zeroth section
> + header is used. */
> +extern int elf_getshdrnum (Elf *__elf, size_t *__dst);
> +/* Sun messed up the implementation of 'elf_getshnum' in their implementation.
> + It was agreed to make the same functionality available under a different
> + name and obsolete the old name. */
> +extern int elf_getshnum (Elf *__elf, size_t *__dst)
> + __deprecated_attribute__;
> +
> +
> +/* Get the section index of the section header string table in the ELF
> + file. If the index cannot be represented in the e_shstrndx field of
> + the ELF header the information from the sh_link field in the zeroth
> + section header is used. */
> +extern int elf_getshdrstrndx (Elf *__elf, size_t *__dst);
> +/* Sun messed up the implementation of 'elf_getshstrndx' in their
> + implementation. It was agreed to make the same functionality available
> + under a different name and obsolete the old name. */
> +extern int elf_getshstrndx (Elf *__elf, size_t *__dst)
> + __deprecated_attribute__;
> +
> +
> +/* Retrieve section header of ELFCLASS32 binary. */
> +extern Elf32_Shdr *elf32_getshdr (Elf_Scn *__scn);
> +/* Similar for ELFCLASS64. */
> +extern Elf64_Shdr *elf64_getshdr (Elf_Scn *__scn);
> +
> +/* Returns compression header for a section if section data is
> + compressed. Returns NULL and sets elf_errno if the section isn't
> + compressed or an error occurred. */
> +extern Elf32_Chdr *elf32_getchdr (Elf_Scn *__scn);
> +extern Elf64_Chdr *elf64_getchdr (Elf_Scn *__scn);
> +
> +/* Compress or decompress the data of a section and adjust the section
> + header.
> +
> + elf_compress works by setting or clearing the SHF_COMPRESS flag
> + from the section Shdr and will encode or decode a Elf32_Chdr or
> + Elf64_Chdr at the start of the section data. elf_compress_gnu will
> + encode or decode any section, but is traditionally only used for
> + sections that have a name starting with ".debug" when
> + uncompressed or ".zdebug" when compressed and stores just the
> + uncompressed size. The GNU compression method is deprecated and
> + should only be used for legacy support.
> +
> + elf_compress takes a compression type that should be either zero to
> + decompress or an ELFCOMPRESS algorithm to use for compression.
> + Currently ELFCOMPRESS_ZLIB and ELFCOMPRESS_ZSTD are supported.
> + elf_compress_gnu will compress in the traditional GNU compression
> + format when compress is one and decompress the section data when
> + compress is zero.
> +
> + The FLAGS argument can be zero or ELF_CHF_FORCE. If FLAGS contains
> + ELF_CHF_FORCE then it will always compress the section, even if
> + that would not reduce the size of the data section (including the
> + header). Otherwise elf_compress and elf_compress_gnu will compress
> + the section only if the total data size is reduced.
> +
> + On successful compression or decompression the function returns
> + one. If (not forced) compression is requested and the data section
> + would not actually reduce in size, the section is not actually
> + compressed and zero is returned. Otherwise -1 is returned and
> + elf_errno is set.
> +
> + It is an error to request compression for a section that already
> + has SHF_COMPRESSED set, or (for elf_compress) to request
> + decompression for an section that doesn't have SHF_COMPRESSED set.
> + If a section has SHF_COMPRESSED set then calling elf_compress_gnu
> + will result in an error. The section has to be decompressed first
> + using elf_compress. Calling elf_compress on a section compressed
> + with elf_compress_gnu is fine, but probably useless.
> +
> + It is always an error to call these functions on SHT_NOBITS
> + sections or if the section has the SHF_ALLOC flag set.
> + elf_compress_gnu will not check whether the section name starts
> + with ".debug" or .zdebug". It is the responsibility of the caller
> + to make sure the deprecated GNU compression method is only called
> + on correctly named sections (and to change the name of the section
> + when using elf_compress_gnu).
> +
> + All previous returned Shdrs and Elf_Data buffers are invalidated by
> + this call and should no longer be accessed.
> +
> + Note that although this changes the header and data returned it
> + doesn't mark the section as dirty. To keep the changes when
> + calling elf_update the section has to be flagged ELF_F_DIRTY. */
> +extern int elf_compress (Elf_Scn *scn, int type, unsigned int flags);
> +extern int elf_compress_gnu (Elf_Scn *scn, int compress, unsigned int flags);
> +
> +/* Set or clear flags for ELF file. */
> +extern unsigned int elf_flagelf (Elf *__elf, Elf_Cmd __cmd,
> + unsigned int __flags);
> +/* Similarly for the ELF header. */
> +extern unsigned int elf_flagehdr (Elf *__elf, Elf_Cmd __cmd,
> + unsigned int __flags);
> +/* Similarly for the ELF program header. */
> +extern unsigned int elf_flagphdr (Elf *__elf, Elf_Cmd __cmd,
> + unsigned int __flags);
> +/* Similarly for the given ELF section. */
> +extern unsigned int elf_flagscn (Elf_Scn *__scn, Elf_Cmd __cmd,
> + unsigned int __flags);
> +/* Similarly for the given ELF data. */
> +extern unsigned int elf_flagdata (Elf_Data *__data, Elf_Cmd __cmd,
> + unsigned int __flags);
> +/* Similarly for the given ELF section header. */
> +extern unsigned int elf_flagshdr (Elf_Scn *__scn, Elf_Cmd __cmd,
> + unsigned int __flags);
> +
> +
> +/* Get data from section while translating from file representation to
> + memory representation. The Elf_Data d_type is set based on the
> + section type if known. Otherwise d_type is set to ELF_T_BYTE. If
> + the section contains compressed data then d_type is always set to
> + ELF_T_CHDR. */
> +extern Elf_Data *elf_getdata (Elf_Scn *__scn, Elf_Data *__data);
> +
> +/* Get uninterpreted section content. */
> +extern Elf_Data *elf_rawdata (Elf_Scn *__scn, Elf_Data *__data);
> +
> +/* Create new data descriptor for section SCN. */
> +extern Elf_Data *elf_newdata (Elf_Scn *__scn);
> +
> +/* Get data translated from a chunk of the file contents as section data
> + would be for TYPE. The resulting Elf_Data pointer is valid until
> + elf_end (ELF) is called. */
> +extern Elf_Data *elf_getdata_rawchunk (Elf *__elf,
> + int64_t __offset, size_t __size,
> + Elf_Type __type);
> +
> +
> +/* Return pointer to string at OFFSET in section INDEX. */
> +extern char *elf_strptr (Elf *__elf, size_t __index, size_t __offset);
> +
> +
> +/* Return header of archive. */
> +extern Elf_Arhdr *elf_getarhdr (Elf *__elf);
> +
> +/* Return offset in archive for current file ELF. */
> +extern int64_t elf_getaroff (Elf *__elf);
> +
> +/* Select archive element at OFFSET. */
> +extern size_t elf_rand (Elf *__elf, size_t __offset);
> +
> +/* Get symbol table of archive. */
> +extern Elf_Arsym *elf_getarsym (Elf *__elf, size_t *__narsyms);
> +
> +
> +/* Control ELF descriptor. */
> +extern int elf_cntl (Elf *__elf, Elf_Cmd __cmd);
> +
> +/* Retrieve uninterpreted file contents. */
> +extern char *elf_rawfile (Elf *__elf, size_t *__nbytes);
> +
> +
> +/* Return size of array of COUNT elements of the type denoted by TYPE
> + in the external representation. The binary class is taken from ELF.
> + The result is based on version VERSION of the ELF standard. */
> +extern size_t elf32_fsize (Elf_Type __type, size_t __count,
> + unsigned int __version)
> + __const_attribute__;
> +/* Similar but this time the binary calls is ELFCLASS64. */
> +extern size_t elf64_fsize (Elf_Type __type, size_t __count,
> + unsigned int __version)
> + __const_attribute__;
> +
> +
> +/* Convert data structure from the representation in the file represented
> + by ELF to their memory representation. */
> +extern Elf_Data *elf32_xlatetom (Elf_Data *__dest, const Elf_Data *__src,
> + unsigned int __encode);
> +/* Same for 64 bit class. */
> +extern Elf_Data *elf64_xlatetom (Elf_Data *__dest, const Elf_Data *__src,
> + unsigned int __encode);
> +
> +/* Convert data structure from to the representation in memory
> + represented by ELF file representation. */
> +extern Elf_Data *elf32_xlatetof (Elf_Data *__dest, const Elf_Data *__src,
> + unsigned int __encode);
> +/* Same for 64 bit class. */
> +extern Elf_Data *elf64_xlatetof (Elf_Data *__dest, const Elf_Data *__src,
> + unsigned int __encode);
> +
> +
> +/* Return error code of last failing function call. This value is kept
> + separately for each thread. */
> +extern int elf_errno (void);
> +
> +/* Return error string for ERROR. If ERROR is zero, return error string
> + for most recent error or NULL is none occurred. If ERROR is -1 the
> + behaviour is similar to the last case except that not NULL but a legal
> + string is returned. */
> +extern const char *elf_errmsg (int __error);
> +
> +
> +/* Coordinate ELF library and application versions. */
> +extern unsigned int elf_version (unsigned int __version);
> +
> +/* Set fill bytes used to fill holes in data structures. */
> +extern void elf_fill (int __fill);
> +
> +/* Compute hash value. */
> +extern unsigned long int elf_hash (const char *__string)
> + __pure_attribute__;
> +
> +/* Compute hash value using the GNU-specific hash function. */
> +extern unsigned long int elf_gnu_hash (const char *__string)
> + __pure_attribute__;
> +
> +
> +/* Compute simple checksum from permanent parts of the ELF file. */
> +extern long int elf32_checksum (Elf *__elf);
> +/* Similar but this time the binary calls is ELFCLASS64. */
> +extern long int elf64_checksum (Elf *__elf);
> +
> +#ifdef __cplusplus
> +}
> +#endif
> +
> +#endif /* libelf.h */
Ping,
Thanks.
在 2024/3/11 18:02, Ying Huang 写道:
> Hi Mark,
>
> Could you please review these patches, I have splited patch v2 1/5 to patch v3 1/6 and 2/6.
>
> Thanks,
>
> Ying
>
>
> 在 2024/3/5 17:51, Ying Huang 写道:
>> From: Ying Huang <ying.huang@oss.cipunited.com>
>>
>> Signed-off-by: Ying Huang <ying.huang@oss.cipunited.com>
>> ---
>> backends/Makefile.am | 6 +-
>> backends/mips_init.c | 52 ++++
>> backends/mips_reloc.def | 93 +++++++
>> backends/mips_symbol.c | 63 +++++
>> libebl/eblopenbackend.c | 2 +
>> libelf/libelfP.h | 3 +
>> tests/libelf.h | 541 ++++++++++++++++++++++++++++++++++++++++
>> 7 files changed, 758 insertions(+), 2 deletions(-)
>> create mode 100644 backends/mips_init.c
>> create mode 100644 backends/mips_reloc.def
>> create mode 100644 backends/mips_symbol.c
>> create mode 100644 tests/libelf.h
>>
>> diff --git a/backends/Makefile.am b/backends/Makefile.am
>> index bbb2aac7..b946fd30 100644
>> --- a/backends/Makefile.am
>> +++ b/backends/Makefile.am
>> @@ -37,7 +37,7 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \
>> noinst_LIBRARIES = libebl_backends.a libebl_backends_pic.a
>>
>> modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \
>> - m68k bpf riscv csky loongarch arc
>> + m68k bpf riscv csky loongarch arc mips
>>
>> i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \
>> i386_retval.c i386_regs.c i386_auxv.c \
>> @@ -102,12 +102,14 @@ loongarch_SRCS = loongarch_init.c loongarch_symbol.c loongarch_cfi.c \
>>
>> arc_SRCS = arc_init.c arc_symbol.c
>>
>> +mips_SRCS = mips_init.c mips_symbol.c
>> +
>> libebl_backends_a_SOURCES = $(i386_SRCS) $(sh_SRCS) $(x86_64_SRCS) \
>> $(ia64_SRCS) $(alpha_SRCS) $(arm_SRCS) \
>> $(aarch64_SRCS) $(sparc_SRCS) $(ppc_SRCS) \
>> $(ppc64_SRCS) $(s390_SRCS) \
>> $(m68k_SRCS) $(bpf_SRCS) $(riscv_SRCS) $(csky_SRCS) \
>> - $(loongarch_SRCS) $(arc_SRCS)
>> + $(loongarch_SRCS) $(arc_SRCS) $(mips_SRCS)
>>
>> libebl_backends_pic_a_SOURCES =
>> am_libebl_backends_pic_a_OBJECTS = $(libebl_backends_a_SOURCES:.c=.os)
>> diff --git a/backends/mips_init.c b/backends/mips_init.c
>> new file mode 100644
>> index 00000000..cedd08ca
>> --- /dev/null
>> +++ b/backends/mips_init.c
>> @@ -0,0 +1,52 @@
>> +/* Initialization of MIPS specific backend library.
>> + Copyright (C) 2024 CIP United Inc.
>> + This file is part of elfutils.
>> +
>> + This file is free software; you can redistribute it and/or modify
>> + it under the terms of either
>> +
>> + * the GNU Lesser General Public License as published by the Free
>> + Software Foundation; either version 3 of the License, or (at
>> + your option) any later version
>> +
>> + or
>> +
>> + * the GNU General Public License as published by the Free
>> + Software Foundation; either version 2 of the License, or (at
>> + your option) any later version
>> +
>> + or both in parallel, as here.
>> +
>> + elfutils is distributed in the hope that it will be useful, but
>> + WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + General Public License for more details.
>> +
>> + You should have received copies of the GNU General Public License and
>> + the GNU Lesser General Public License along with this program. If
>> + not, see <http://www.gnu.org/licenses/>. */
>> +
>> +#ifdef HAVE_CONFIG_H
>> +# include <config.h>
>> +#endif
>> +
>> +#define BACKEND mips_
>> +#define RELOC_PREFIX R_MIPS_
>> +#include "libebl_CPU.h"
>> +#include "libelfP.h"
>> +
>> +#define RELOC_TYPE_ID(type) ((type) & 0xff)
>> +
>> +/* This defines the common reloc hooks based on mips_reloc.def. */
>> +#include "common-reloc.c"
>> +
>> +Ebl *
>> +mips_init (Elf *elf __attribute__ ((unused)),
>> + GElf_Half machine __attribute__ ((unused)),
>> + Ebl *eh)
>> +{
>> + /* We handle it. */
>> + mips_init_reloc (eh);
>> + HOOK (eh, reloc_simple_type);
>> + return eh;
>> +}
>> diff --git a/backends/mips_reloc.def b/backends/mips_reloc.def
>> new file mode 100644
>> index 00000000..5120980c
>> --- /dev/null
>> +++ b/backends/mips_reloc.def
>> @@ -0,0 +1,93 @@
>> +/* List the relocation types for MIPS. -*- C -*-
>> + Copyright (C) 2024 CIP United Inc.
>> + This file is part of elfutils.
>> +
>> + This file is free software; you can redistribute it and/or modify
>> + it under the terms of either
>> +
>> + * the GNU Lesser General Public License as published by the Free
>> + Software Foundation; either version 3 of the License, or (at
>> + your option) any later version
>> +
>> + or
>> +
>> + * the GNU General Public License as published by the Free
>> + Software Foundation; either version 2 of the License, or (at
>> + your option) any later version
>> +
>> + or both in parallel, as here.
>> +
>> + elfutils is distributed in the hope that it will be useful, but
>> + WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + General Public License for more details.
>> +
>> + You should have received copies of the GNU General Public License and
>> + the GNU Lesser General Public License along with this program. If
>> + not, see <http://www.gnu.org/licenses/>. */
>> +
>> +/* NAME, REL|EXEC|DYN */
>> +
>> +
>> +RELOC_TYPE (NONE, REL|EXEC|DYN)
>> +RELOC_TYPE (16, REL|EXEC|DYN)
>> +RELOC_TYPE (32, REL)
>> +RELOC_TYPE (REL32, REL|EXEC|DYN)
>> +RELOC_TYPE (26, REL|DYN)
>> +RELOC_TYPE (HI16, REL)
>> +RELOC_TYPE (LO16, REL|EXEC|DYN)
>> +RELOC_TYPE (GPREL16, REL|EXEC|DYN)
>> +RELOC_TYPE (LITERAL, REL|EXEC|DYN)
>> +RELOC_TYPE (GOT16, REL|EXEC|DYN)
>> +RELOC_TYPE (PC16, REL)
>> +RELOC_TYPE (CALL16, REL)
>> +RELOC_TYPE (GPREL32, REL)
>> +RELOC_TYPE (SHIFT5, REL)
>> +RELOC_TYPE (SHIFT6, REL)
>> +RELOC_TYPE (64, REL)
>> +RELOC_TYPE (GOT_DISP, REL)
>> +RELOC_TYPE (GOT_PAGE, REL)
>> +RELOC_TYPE (GOT_OFST, REL)
>> +RELOC_TYPE (GOT_HI16, REL)
>> +RELOC_TYPE (GOT_LO16, REL)
>> +RELOC_TYPE (SUB, REL)
>> +RELOC_TYPE (INSERT_A, REL)
>> +RELOC_TYPE (INSERT_B, REL)
>> +RELOC_TYPE (DELETE, REL)
>> +RELOC_TYPE (HIGHER, REL)
>> +RELOC_TYPE (HIGHEST, REL)
>> +RELOC_TYPE (CALL_HI16, REL)
>> +RELOC_TYPE (CALL_LO16, REL)
>> +RELOC_TYPE (SCN_DISP, REL)
>> +RELOC_TYPE (REL16, REL)
>> +RELOC_TYPE (ADD_IMMEDIATE, REL)
>> +RELOC_TYPE (PJUMP, REL)
>> +RELOC_TYPE (RELGOT, REL)
>> +RELOC_TYPE (JALR, REL)
>> +RELOC_TYPE (TLS_DTPMOD32, DYN)
>> +RELOC_TYPE (TLS_DTPREL32, REL)
>> +RELOC_TYPE (TLS_DTPMOD64, DYN)
>> +RELOC_TYPE (TLS_DTPREL64, REL)
>> +RELOC_TYPE (TLS_GD, REL)
>> +RELOC_TYPE (TLS_LDM, REL)
>> +RELOC_TYPE (TLS_DTPREL_HI16, REL)
>> +RELOC_TYPE (TLS_DTPREL_LO16, REL)
>> +RELOC_TYPE (TLS_GOTTPREL, REL)
>> +RELOC_TYPE (TLS_TPREL32, REL)
>> +RELOC_TYPE (TLS_TPREL64, REL)
>> +RELOC_TYPE (TLS_TPREL_HI16, REL)
>> +RELOC_TYPE (TLS_TPREL_LO16, REL)
>> +RELOC_TYPE (GLOB_DAT, REL)
>> +RELOC_TYPE (PC21_S2, REL)
>> +RELOC_TYPE (PC26_S2, REL)
>> +RELOC_TYPE (PC18_S3, REL)
>> +RELOC_TYPE (PC19_S2, REL)
>> +RELOC_TYPE (PCHI16, REL)
>> +RELOC_TYPE (PCLO16, REL)
>> +RELOC_TYPE (COPY, REL)
>> +RELOC_TYPE (JUMP_SLOT, REL)
>> +RELOC_TYPE (PC32, REL)
>> +RELOC_TYPE (EH, REL)
>> +RELOC_TYPE (GNU_REL16_S2, REL)
>> +RELOC_TYPE (GNU_VTINHERIT, REL)
>> +RELOC_TYPE (GNU_VTENTRY, REL)
>> diff --git a/backends/mips_symbol.c b/backends/mips_symbol.c
>> new file mode 100644
>> index 00000000..f2a46495
>> --- /dev/null
>> +++ b/backends/mips_symbol.c
>> @@ -0,0 +1,63 @@
>> +/* MIPS specific symbolic name handling.
>> + Copyright (C) 2024 CIP United Inc.
>> + This file is part of elfutils.
>> +
>> + This file is free software; you can redistribute it and/or modify
>> + it under the terms of either
>> +
>> + * the GNU Lesser General Public License as published by the Free
>> + Software Foundation; either version 3 of the License, or (at
>> + your option) any later version
>> +
>> + or
>> +
>> + * the GNU General Public License as published by the Free
>> + Software Foundation; either version 2 of the License, or (at
>> + your option) any later version
>> +
>> + or both in parallel, as here.
>> +
>> + elfutils is distributed in the hope that it will be useful, but
>> + WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + General Public License for more details.
>> +
>> + You should have received copies of the GNU General Public License and
>> + the GNU Lesser General Public License along with this program. If
>> + not, see <http://www.gnu.org/licenses/>. */
>> +
>> +#ifdef HAVE_CONFIG_H
>> +# include <config.h>
>> +#endif
>> +
>> +#include <system.h>
>> +
>> +#include <elf.h>
>> +#include <stddef.h>
>> +#include <string.h>
>> +#include <stdio.h>
>> +#define BACKEND mips_
>> +#include "libebl_CPU.h"
>> +#include "libelfP.h"
>> +
>> +/* Check for the simple reloc types. */
>> +Elf_Type
>> +mips_reloc_simple_type (Ebl *ebl, int type,
>> + int *addsub __attribute__ ((unused)))
>> +{
>> + int typeNew = type;
>> + if(ebl->elf->class == ELFCLASS64)
>> + typeNew = ELF64_MIPS_R_TYPE1(type);
>> + switch (typeNew)
>> + {
>> + case R_MIPS_64:
>> + return ELF_T_XWORD;
>> + case R_MIPS_32:
>> + return ELF_T_WORD;
>> + case R_MIPS_16:
>> + return ELF_T_HALF;
>> +
>> + default:
>> + return ELF_T_NUM;
>> + }
>> +}
>> diff --git a/libebl/eblopenbackend.c b/libebl/eblopenbackend.c
>> index 084a1544..a5f7467a 100644
>> --- a/libebl/eblopenbackend.c
>> +++ b/libebl/eblopenbackend.c
>> @@ -57,6 +57,7 @@ Ebl *riscv_init (Elf *, GElf_Half, Ebl *);
>> Ebl *csky_init (Elf *, GElf_Half, Ebl *);
>> Ebl *loongarch_init (Elf *, GElf_Half, Ebl *);
>> Ebl *arc_init (Elf *, GElf_Half, Ebl *);
>> +Ebl *mips_init (Elf *, GElf_Half, Ebl *);
>>
>> /* This table should contain the complete list of architectures as far
>> as the ELF specification is concerned. */
>> @@ -154,6 +155,7 @@ static const struct
>> { csky_init, "elf_csky", "csky", 4, EM_CSKY, ELFCLASS32, ELFDATA2LSB },
>> { loongarch_init, "elf_loongarch", "loongarch", 9, EM_LOONGARCH, ELFCLASS64, ELFDATA2LSB },
>> { arc_init, "elf_arc", "arc", 3, EM_ARCV2, ELFCLASS32, ELFDATA2LSB },
>> + { mips_init, "elf_mips", "mips", 4, EM_MIPS, 0, 0 },
>> };
>> #define nmachines (sizeof (machines) / sizeof (machines[0]))
>>
>> diff --git a/libelf/libelfP.h b/libelf/libelfP.h
>> index ed061abb..bdd2cc6a 100644
>> --- a/libelf/libelfP.h
>> +++ b/libelf/libelfP.h
>> @@ -617,4 +617,7 @@ extern void __libelf_reset_rawdata (Elf_Scn *scn, void *buf, size_t size,
>> #define INVALID_NDX(ndx, type, data) \
>> unlikely ((data)->d_size / sizeof (type) <= (unsigned int) (ndx))
>>
>> +#define ELF64_MIPS_R_TYPE1(i) ((i) & 0xff)
>> +#define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff)
>> +#define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff)
>> #endif /* libelfP.h */
>> diff --git a/tests/libelf.h b/tests/libelf.h
>> new file mode 100644
>> index 00000000..d3f057b4
>> --- /dev/null
>> +++ b/tests/libelf.h
>> @@ -0,0 +1,541 @@
>> +/* Interface for libelf.
>> + Copyright (C) 1998-2010, 2015 Red Hat, Inc.
>> + This file is part of elfutils.
>> +
>> + This file is free software; you can redistribute it and/or modify
>> + it under the terms of either
>> +
>> + * the GNU Lesser General Public License as published by the Free
>> + Software Foundation; either version 3 of the License, or (at
>> + your option) any later version
>> +
>> + or
>> +
>> + * the GNU General Public License as published by the Free
>> + Software Foundation; either version 2 of the License, or (at
>> + your option) any later version
>> +
>> + or both in parallel, as here.
>> +
>> + elfutils is distributed in the hope that it will be useful, but
>> + WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + General Public License for more details.
>> +
>> + You should have received copies of the GNU General Public License and
>> + the GNU Lesser General Public License along with this program. If
>> + not, see <http://www.gnu.org/licenses/>. */
>> +
>> +#ifndef _LIBELF_H
>> +#define _LIBELF_H 1
>> +
>> +#include <stdint.h>
>> +#include <sys/types.h>
>> +
>> +/* Get the ELF types. */
>> +#include <elf.h>
>> +
>> +#ifndef SHF_COMPRESSED
>> + /* Older glibc elf.h might not yet define the ELF compression types. */
>> + #define SHF_COMPRESSED (1 << 11) /* Section with compressed data. */
>> +
>> + /* Section compression header. Used when SHF_COMPRESSED is set. */
>> +
>> + typedef struct
>> + {
>> + Elf32_Word ch_type; /* Compression format. */
>> + Elf32_Word ch_size; /* Uncompressed data size. */
>> + Elf32_Word ch_addralign; /* Uncompressed data alignment. */
>> + } Elf32_Chdr;
>> +
>> + typedef struct
>> + {
>> + Elf64_Word ch_type; /* Compression format. */
>> + Elf64_Word ch_reserved;
>> + Elf64_Xword ch_size; /* Uncompressed data size. */
>> + Elf64_Xword ch_addralign; /* Uncompressed data alignment. */
>> + } Elf64_Chdr;
>> +
>> + /* Legal values for ch_type (compression algorithm). */
>> + #define ELFCOMPRESS_ZLIB 1 /* ZLIB/DEFLATE algorithm. */
>> + #define ELFCOMPRESS_LOOS 0x60000000 /* Start of OS-specific. */
>> + #define ELFCOMPRESS_HIOS 0x6fffffff /* End of OS-specific. */
>> + #define ELFCOMPRESS_LOPROC 0x70000000 /* Start of processor-specific. */
>> + #define ELFCOMPRESS_HIPROC 0x7fffffff /* End of processor-specific. */
>> +#endif
>> +
>> +#ifndef ELFCOMPRESS_ZSTD
>> + /* So ZSTD compression can be used even with an old system elf.h. */
>> + #define ELFCOMPRESS_ZSTD 2 /* Zstandard algorithm. */
>> +#endif
>> +
>> +#ifndef SHT_RELR
>> + /* So RELR defines/typedefs can be used even with an old system elf.h. */
>> + #define SHT_RELR 19 /* RELR relative relocations */
>> +
>> + /* RELR relocation table entry */
>> + typedef Elf32_Word Elf32_Relr;
>> + typedef Elf64_Xword Elf64_Relr;
>> +
>> + #define DT_RELRSZ 35 /* Total size of RELR relative relocations */
>> + #define DT_RELR 36 /* Address of RELR relative relocations */
>> + #define DT_RELRENT 37 /* Size of one RELR relative relocaction */
>> +#endif
>> +
>> +#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
>> +# define __nonnull_attribute__(...) __attribute__ ((__nonnull__ (__VA_ARGS__)))
>> +# define __deprecated_attribute__ __attribute__ ((__deprecated__))
>> +# define __pure_attribute__ __attribute__ ((__pure__))
>> +# define __const_attribute__ __attribute__ ((__const__))
>> +#else
>> +# define __nonnull_attribute__(...)
>> +# define __deprecated_attribute__
>> +# define __pure_attribute__
>> +# define __const_attribute__
>> +#endif
>> +
>> +#if __GNUC__ < 4
>> +#define __noreturn_attribute__
>> +#else
>> +#define __noreturn_attribute__ __attribute__ ((noreturn))
>> +#endif
>> +
>> +#ifdef __GNUC_STDC_INLINE__
>> +# define __libdw_extern_inline extern __inline __attribute__ ((__gnu_inline__))
>> +#else
>> +# define __libdw_extern_inline extern __inline
>> +#endif
>> +
>> +/* Known translation types. */
>> +typedef enum
>> +{
>> + ELF_T_BYTE, /* unsigned char */
>> + ELF_T_ADDR, /* Elf32_Addr, Elf64_Addr, ... */
>> + ELF_T_DYN, /* Dynamic section record. */
>> + ELF_T_EHDR, /* ELF header. */
>> + ELF_T_HALF, /* Elf32_Half, Elf64_Half, ... */
>> + ELF_T_OFF, /* Elf32_Off, Elf64_Off, ... */
>> + ELF_T_PHDR, /* Program header. */
>> + ELF_T_RELA, /* Relocation entry with addend. */
>> + ELF_T_REL, /* Relocation entry. */
>> + ELF_T_SHDR, /* Section header. */
>> + ELF_T_SWORD, /* Elf32_Sword, Elf64_Sword, ... */
>> + ELF_T_SYM, /* Symbol record. */
>> + ELF_T_WORD, /* Elf32_Word, Elf64_Word, ... */
>> + ELF_T_XWORD, /* Elf32_Xword, Elf64_Xword, ... */
>> + ELF_T_SXWORD, /* Elf32_Sxword, Elf64_Sxword, ... */
>> + ELF_T_VDEF, /* Elf32_Verdef, Elf64_Verdef, ... */
>> + ELF_T_VDAUX, /* Elf32_Verdaux, Elf64_Verdaux, ... */
>> + ELF_T_VNEED, /* Elf32_Verneed, Elf64_Verneed, ... */
>> + ELF_T_VNAUX, /* Elf32_Vernaux, Elf64_Vernaux, ... */
>> + ELF_T_NHDR, /* Elf32_Nhdr, Elf64_Nhdr, ... */
>> + ELF_T_SYMINFO, /* Elf32_Syminfo, Elf64_Syminfo, ... */
>> + ELF_T_MOVE, /* Elf32_Move, Elf64_Move, ... */
>> + ELF_T_LIB, /* Elf32_Lib, Elf64_Lib, ... */
>> + ELF_T_GNUHASH, /* GNU-style hash section. */
>> + ELF_T_AUXV, /* Elf32_auxv_t, Elf64_auxv_t, ... */
>> + ELF_T_CHDR, /* Compressed, Elf32_Chdr, Elf64_Chdr, ... */
>> + ELF_T_NHDR8, /* Special GNU Properties note. Same as Nhdr,
>> + except padding. */
>> + ELF_T_RELR, /* Relative relocation entry. */
>> + /* Keep this the last entry. */
>> + ELF_T_NUM
>> +} Elf_Type;
>> +
>> +/* Descriptor for data to be converted to or from memory format. */
>> +typedef struct
>> +{
>> + void *d_buf; /* Pointer to the actual data. */
>> + Elf_Type d_type; /* Type of this piece of data. */
>> + unsigned int d_version; /* ELF version. */
>> + size_t d_size; /* Size in bytes. */
>> + int64_t d_off; /* Offset into section. */
>> + size_t d_align; /* Alignment in section. */
>> +} Elf_Data;
>> +
>> +
>> +/* Commands for `...'. */
>> +typedef enum
>> +{
>> + ELF_C_NULL, /* Nothing, terminate, or compute only. */
>> + ELF_C_READ, /* Read .. */
>> + ELF_C_RDWR, /* Read and write .. */
>> + ELF_C_WRITE, /* Write .. */
>> + ELF_C_CLR, /* Clear flag. */
>> + ELF_C_SET, /* Set flag. */
>> + ELF_C_FDDONE, /* Signal that file descriptor will not be
>> + used anymore. */
>> + ELF_C_FDREAD, /* Read rest of data so that file descriptor
>> + is not used anymore. */
>> + /* The following are extensions. */
>> + ELF_C_READ_MMAP, /* Read, but mmap the file if possible. */
>> + ELF_C_RDWR_MMAP, /* Read and write, with mmap. */
>> + ELF_C_WRITE_MMAP, /* Write, with mmap. */
>> + ELF_C_READ_MMAP_PRIVATE, /* Read, but memory is writable, results are
>> + not written to the file. */
>> + ELF_C_EMPTY, /* Copy basic file data but not the content. */
>> + /* Keep this the last entry. */
>> + ELF_C_NUM
>> +} Elf_Cmd;
>> +
>> +
>> +/* Flags for the ELF structures. */
>> +enum
>> +{
>> + ELF_F_DIRTY = 0x1,
>> +#define ELF_F_DIRTY ELF_F_DIRTY
>> + ELF_F_LAYOUT = 0x4,
>> +#define ELF_F_LAYOUT ELF_F_LAYOUT
>> + ELF_F_PERMISSIVE = 0x8
>> +#define ELF_F_PERMISSIVE ELF_F_PERMISSIVE
>> +};
>> +
>> +/* Flags for elf_compress[_gnu]. */
>> +enum
>> +{
>> + ELF_CHF_FORCE = 0x1
>> +#define ELF_CHF_FORCE ELF_CHF_FORCE
>> +};
>> +
>> +/* Identification values for recognized object files. */
>> +typedef enum
>> +{
>> + ELF_K_NONE, /* Unknown. */
>> + ELF_K_AR, /* Archive. */
>> + ELF_K_COFF, /* Stupid old COFF. */
>> + ELF_K_ELF, /* ELF file. */
>> + /* Keep this the last entry. */
>> + ELF_K_NUM
>> +} Elf_Kind;
>> +
>> +
>> +/* Archive member header. */
>> +typedef struct
>> +{
>> + char *ar_name; /* Name of archive member. */
>> + time_t ar_date; /* File date. */
>> + uid_t ar_uid; /* User ID. */
>> + gid_t ar_gid; /* Group ID. */
>> + mode_t ar_mode; /* File mode. */
>> + int64_t ar_size; /* File size. */
>> + char *ar_rawname; /* Original name of archive member. */
>> +} Elf_Arhdr;
>> +
>> +
>> +/* Archive symbol table entry. */
>> +typedef struct
>> +{
>> + char *as_name; /* Symbol name. */
>> + size_t as_off; /* Offset for this file in the archive. */
>> + unsigned long int as_hash; /* Hash value of the name. */
>> +} Elf_Arsym;
>> +
>> +
>> +/* Descriptor for the ELF file. */
>> +typedef struct Elf Elf;
>> +
>> +/* Descriptor for ELF file section. */
>> +typedef struct Elf_Scn Elf_Scn;
>> +
>> +
>> +#ifdef __cplusplus
>> +extern "C" {
>> +#endif
>> +
>> +/* Return descriptor for ELF file to work according to CMD. */
>> +extern Elf *elf_begin (int __fildes, Elf_Cmd __cmd, Elf *__ref);
>> +
>> +/* Create a clone of an existing ELF descriptor. */
>> + extern Elf *elf_clone (Elf *__elf, Elf_Cmd __cmd);
>> +
>> +/* Create descriptor for memory region. */
>> +extern Elf *elf_memory (char *__image, size_t __size);
>> +
>> +/* Advance archive descriptor to next element. */
>> +extern Elf_Cmd elf_next (Elf *__elf);
>> +
>> +/* Free resources allocated for ELF. */
>> +extern int elf_end (Elf *__elf);
>> +
>> +/* Update ELF descriptor and write file to disk. */
>> +extern int64_t elf_update (Elf *__elf, Elf_Cmd __cmd);
>> +
>> +/* Determine what kind of file is associated with ELF. */
>> +extern Elf_Kind elf_kind (Elf *__elf) __pure_attribute__;
>> +
>> +/* Get the base offset for an object file. */
>> +extern int64_t elf_getbase (Elf *__elf);
>> +
>> +
>> +/* Retrieve file identification data. */
>> +extern char *elf_getident (Elf *__elf, size_t *__nbytes);
>> +
>> +/* Retrieve class-dependent object file header. */
>> +extern Elf32_Ehdr *elf32_getehdr (Elf *__elf);
>> +/* Similar but this time the binary calls is ELFCLASS64. */
>> +extern Elf64_Ehdr *elf64_getehdr (Elf *__elf);
>> +
>> +/* Create ELF header if none exists. */
>> +extern Elf32_Ehdr *elf32_newehdr (Elf *__elf);
>> +/* Similar but this time the binary calls is ELFCLASS64. */
>> +extern Elf64_Ehdr *elf64_newehdr (Elf *__elf);
>> +
>> +/* Get the number of program headers in the ELF file. If the file uses
>> + more headers than can be represented in the e_phnum field of the ELF
>> + header the information from the sh_info field in the zeroth section
>> + header is used. */
>> +extern int elf_getphdrnum (Elf *__elf, size_t *__dst);
>> +
>> +/* Retrieve class-dependent program header table. */
>> +extern Elf32_Phdr *elf32_getphdr (Elf *__elf);
>> +/* Similar but this time the binary calls is ELFCLASS64. */
>> +extern Elf64_Phdr *elf64_getphdr (Elf *__elf);
>> +
>> +/* Create ELF program header. */
>> +extern Elf32_Phdr *elf32_newphdr (Elf *__elf, size_t __cnt);
>> +/* Similar but this time the binary calls is ELFCLASS64. */
>> +extern Elf64_Phdr *elf64_newphdr (Elf *__elf, size_t __cnt);
>> +
>> +
>> +/* Get section at INDEX. */
>> +extern Elf_Scn *elf_getscn (Elf *__elf, size_t __index);
>> +
>> +/* Get section at OFFSET. */
>> +extern Elf_Scn *elf32_offscn (Elf *__elf, Elf32_Off __offset);
>> +/* Similar but this time the binary calls is ELFCLASS64. */
>> +extern Elf_Scn *elf64_offscn (Elf *__elf, Elf64_Off __offset);
>> +
>> +/* Get index of section. */
>> +extern size_t elf_ndxscn (Elf_Scn *__scn);
>> +
>> +/* Get section with next section index. */
>> +extern Elf_Scn *elf_nextscn (Elf *__elf, Elf_Scn *__scn);
>> +
>> +/* Create a new section and append it at the end of the table. */
>> +extern Elf_Scn *elf_newscn (Elf *__elf);
>> +
>> +/* Get the section index of the extended section index table for the
>> + given symbol table. */
>> +extern int elf_scnshndx (Elf_Scn *__scn);
>> +
>> +/* Get the number of sections in the ELF file. If the file uses more
>> + sections than can be represented in the e_shnum field of the ELF
>> + header the information from the sh_size field in the zeroth section
>> + header is used. */
>> +extern int elf_getshdrnum (Elf *__elf, size_t *__dst);
>> +/* Sun messed up the implementation of 'elf_getshnum' in their implementation.
>> + It was agreed to make the same functionality available under a different
>> + name and obsolete the old name. */
>> +extern int elf_getshnum (Elf *__elf, size_t *__dst)
>> + __deprecated_attribute__;
>> +
>> +
>> +/* Get the section index of the section header string table in the ELF
>> + file. If the index cannot be represented in the e_shstrndx field of
>> + the ELF header the information from the sh_link field in the zeroth
>> + section header is used. */
>> +extern int elf_getshdrstrndx (Elf *__elf, size_t *__dst);
>> +/* Sun messed up the implementation of 'elf_getshstrndx' in their
>> + implementation. It was agreed to make the same functionality available
>> + under a different name and obsolete the old name. */
>> +extern int elf_getshstrndx (Elf *__elf, size_t *__dst)
>> + __deprecated_attribute__;
>> +
>> +
>> +/* Retrieve section header of ELFCLASS32 binary. */
>> +extern Elf32_Shdr *elf32_getshdr (Elf_Scn *__scn);
>> +/* Similar for ELFCLASS64. */
>> +extern Elf64_Shdr *elf64_getshdr (Elf_Scn *__scn);
>> +
>> +/* Returns compression header for a section if section data is
>> + compressed. Returns NULL and sets elf_errno if the section isn't
>> + compressed or an error occurred. */
>> +extern Elf32_Chdr *elf32_getchdr (Elf_Scn *__scn);
>> +extern Elf64_Chdr *elf64_getchdr (Elf_Scn *__scn);
>> +
>> +/* Compress or decompress the data of a section and adjust the section
>> + header.
>> +
>> + elf_compress works by setting or clearing the SHF_COMPRESS flag
>> + from the section Shdr and will encode or decode a Elf32_Chdr or
>> + Elf64_Chdr at the start of the section data. elf_compress_gnu will
>> + encode or decode any section, but is traditionally only used for
>> + sections that have a name starting with ".debug" when
>> + uncompressed or ".zdebug" when compressed and stores just the
>> + uncompressed size. The GNU compression method is deprecated and
>> + should only be used for legacy support.
>> +
>> + elf_compress takes a compression type that should be either zero to
>> + decompress or an ELFCOMPRESS algorithm to use for compression.
>> + Currently ELFCOMPRESS_ZLIB and ELFCOMPRESS_ZSTD are supported.
>> + elf_compress_gnu will compress in the traditional GNU compression
>> + format when compress is one and decompress the section data when
>> + compress is zero.
>> +
>> + The FLAGS argument can be zero or ELF_CHF_FORCE. If FLAGS contains
>> + ELF_CHF_FORCE then it will always compress the section, even if
>> + that would not reduce the size of the data section (including the
>> + header). Otherwise elf_compress and elf_compress_gnu will compress
>> + the section only if the total data size is reduced.
>> +
>> + On successful compression or decompression the function returns
>> + one. If (not forced) compression is requested and the data section
>> + would not actually reduce in size, the section is not actually
>> + compressed and zero is returned. Otherwise -1 is returned and
>> + elf_errno is set.
>> +
>> + It is an error to request compression for a section that already
>> + has SHF_COMPRESSED set, or (for elf_compress) to request
>> + decompression for an section that doesn't have SHF_COMPRESSED set.
>> + If a section has SHF_COMPRESSED set then calling elf_compress_gnu
>> + will result in an error. The section has to be decompressed first
>> + using elf_compress. Calling elf_compress on a section compressed
>> + with elf_compress_gnu is fine, but probably useless.
>> +
>> + It is always an error to call these functions on SHT_NOBITS
>> + sections or if the section has the SHF_ALLOC flag set.
>> + elf_compress_gnu will not check whether the section name starts
>> + with ".debug" or .zdebug". It is the responsibility of the caller
>> + to make sure the deprecated GNU compression method is only called
>> + on correctly named sections (and to change the name of the section
>> + when using elf_compress_gnu).
>> +
>> + All previous returned Shdrs and Elf_Data buffers are invalidated by
>> + this call and should no longer be accessed.
>> +
>> + Note that although this changes the header and data returned it
>> + doesn't mark the section as dirty. To keep the changes when
>> + calling elf_update the section has to be flagged ELF_F_DIRTY. */
>> +extern int elf_compress (Elf_Scn *scn, int type, unsigned int flags);
>> +extern int elf_compress_gnu (Elf_Scn *scn, int compress, unsigned int flags);
>> +
>> +/* Set or clear flags for ELF file. */
>> +extern unsigned int elf_flagelf (Elf *__elf, Elf_Cmd __cmd,
>> + unsigned int __flags);
>> +/* Similarly for the ELF header. */
>> +extern unsigned int elf_flagehdr (Elf *__elf, Elf_Cmd __cmd,
>> + unsigned int __flags);
>> +/* Similarly for the ELF program header. */
>> +extern unsigned int elf_flagphdr (Elf *__elf, Elf_Cmd __cmd,
>> + unsigned int __flags);
>> +/* Similarly for the given ELF section. */
>> +extern unsigned int elf_flagscn (Elf_Scn *__scn, Elf_Cmd __cmd,
>> + unsigned int __flags);
>> +/* Similarly for the given ELF data. */
>> +extern unsigned int elf_flagdata (Elf_Data *__data, Elf_Cmd __cmd,
>> + unsigned int __flags);
>> +/* Similarly for the given ELF section header. */
>> +extern unsigned int elf_flagshdr (Elf_Scn *__scn, Elf_Cmd __cmd,
>> + unsigned int __flags);
>> +
>> +
>> +/* Get data from section while translating from file representation to
>> + memory representation. The Elf_Data d_type is set based on the
>> + section type if known. Otherwise d_type is set to ELF_T_BYTE. If
>> + the section contains compressed data then d_type is always set to
>> + ELF_T_CHDR. */
>> +extern Elf_Data *elf_getdata (Elf_Scn *__scn, Elf_Data *__data);
>> +
>> +/* Get uninterpreted section content. */
>> +extern Elf_Data *elf_rawdata (Elf_Scn *__scn, Elf_Data *__data);
>> +
>> +/* Create new data descriptor for section SCN. */
>> +extern Elf_Data *elf_newdata (Elf_Scn *__scn);
>> +
>> +/* Get data translated from a chunk of the file contents as section data
>> + would be for TYPE. The resulting Elf_Data pointer is valid until
>> + elf_end (ELF) is called. */
>> +extern Elf_Data *elf_getdata_rawchunk (Elf *__elf,
>> + int64_t __offset, size_t __size,
>> + Elf_Type __type);
>> +
>> +
>> +/* Return pointer to string at OFFSET in section INDEX. */
>> +extern char *elf_strptr (Elf *__elf, size_t __index, size_t __offset);
>> +
>> +
>> +/* Return header of archive. */
>> +extern Elf_Arhdr *elf_getarhdr (Elf *__elf);
>> +
>> +/* Return offset in archive for current file ELF. */
>> +extern int64_t elf_getaroff (Elf *__elf);
>> +
>> +/* Select archive element at OFFSET. */
>> +extern size_t elf_rand (Elf *__elf, size_t __offset);
>> +
>> +/* Get symbol table of archive. */
>> +extern Elf_Arsym *elf_getarsym (Elf *__elf, size_t *__narsyms);
>> +
>> +
>> +/* Control ELF descriptor. */
>> +extern int elf_cntl (Elf *__elf, Elf_Cmd __cmd);
>> +
>> +/* Retrieve uninterpreted file contents. */
>> +extern char *elf_rawfile (Elf *__elf, size_t *__nbytes);
>> +
>> +
>> +/* Return size of array of COUNT elements of the type denoted by TYPE
>> + in the external representation. The binary class is taken from ELF.
>> + The result is based on version VERSION of the ELF standard. */
>> +extern size_t elf32_fsize (Elf_Type __type, size_t __count,
>> + unsigned int __version)
>> + __const_attribute__;
>> +/* Similar but this time the binary calls is ELFCLASS64. */
>> +extern size_t elf64_fsize (Elf_Type __type, size_t __count,
>> + unsigned int __version)
>> + __const_attribute__;
>> +
>> +
>> +/* Convert data structure from the representation in the file represented
>> + by ELF to their memory representation. */
>> +extern Elf_Data *elf32_xlatetom (Elf_Data *__dest, const Elf_Data *__src,
>> + unsigned int __encode);
>> +/* Same for 64 bit class. */
>> +extern Elf_Data *elf64_xlatetom (Elf_Data *__dest, const Elf_Data *__src,
>> + unsigned int __encode);
>> +
>> +/* Convert data structure from to the representation in memory
>> + represented by ELF file representation. */
>> +extern Elf_Data *elf32_xlatetof (Elf_Data *__dest, const Elf_Data *__src,
>> + unsigned int __encode);
>> +/* Same for 64 bit class. */
>> +extern Elf_Data *elf64_xlatetof (Elf_Data *__dest, const Elf_Data *__src,
>> + unsigned int __encode);
>> +
>> +
>> +/* Return error code of last failing function call. This value is kept
>> + separately for each thread. */
>> +extern int elf_errno (void);
>> +
>> +/* Return error string for ERROR. If ERROR is zero, return error string
>> + for most recent error or NULL is none occurred. If ERROR is -1 the
>> + behaviour is similar to the last case except that not NULL but a legal
>> + string is returned. */
>> +extern const char *elf_errmsg (int __error);
>> +
>> +
>> +/* Coordinate ELF library and application versions. */
>> +extern unsigned int elf_version (unsigned int __version);
>> +
>> +/* Set fill bytes used to fill holes in data structures. */
>> +extern void elf_fill (int __fill);
>> +
>> +/* Compute hash value. */
>> +extern unsigned long int elf_hash (const char *__string)
>> + __pure_attribute__;
>> +
>> +/* Compute hash value using the GNU-specific hash function. */
>> +extern unsigned long int elf_gnu_hash (const char *__string)
>> + __pure_attribute__;
>> +
>> +
>> +/* Compute simple checksum from permanent parts of the ELF file. */
>> +extern long int elf32_checksum (Elf *__elf);
>> +/* Similar but this time the binary calls is ELFCLASS64. */
>> +extern long int elf64_checksum (Elf *__elf);
>> +
>> +#ifdef __cplusplus
>> +}
>> +#endif
>> +
>> +#endif /* libelf.h */
Hi Ying,
On Tue, Mar 05, 2024 at 05:51:17PM +0800, Ying Huang wrote:
> From: Ying Huang <ying.huang@oss.cipunited.com>
>
> Signed-off-by: Ying Huang <ying.huang@oss.cipunited.com>
> ---
> backends/Makefile.am | 6 +-
> backends/mips_init.c | 52 ++++
> backends/mips_reloc.def | 93 +++++++
> backends/mips_symbol.c | 63 +++++
> libebl/eblopenbackend.c | 2 +
> libelf/libelfP.h | 3 +
> tests/libelf.h | 541 ++++++++++++++++++++++++++++++++++++++++
Note that this adds tests/libelf.h by accident. I see how that could
happen, because it should have been in .gitignore. I posted a patch
to do that:
https://inbox.sourceware.org/elfutils-devel/20240328234308.1032110-1-mark@klomp.org/
Besides that the patch looks fine. I did add a ChangeLog entry to the
commit message. Pushed as attached.
Thanks,
Mark
From e259f126f5077923e415e306915de50ed0f0db56 Mon Sep 17 00:00:00 2001
From: Ying Huang <ying.huang@oss.cipunited.com>
Date: Tue, 5 Mar 2024 17:51:17 +0800
Subject: [PATCH] Support Mips architecture
* backends/Makefile.am (modules): Add mips.
(mips_SRCS): New var for mips_init.c mips_symbol.c.
(libebl_backends_a_SOURCES): Add mips_SRCS.
* backends/mips_init.c: New file.
* backends/mips_reloc.def: Likewise.
* backends/mips_symbol.c: Likewise.
* libebl/eblopenbackend.c (mips_init): Declare.
(machines): Add mips.
* libelf/libelfP.h: Add ELF64_MIPS_R_TYPE{1,2,3}
Signed-off-by: Ying Huang <ying.huang@oss.cipunited.com>
---
backends/Makefile.am | 6 ++-
backends/mips_init.c | 52 +++++++++++++++++++++++
backends/mips_reloc.def | 93 +++++++++++++++++++++++++++++++++++++++++
backends/mips_symbol.c | 63 ++++++++++++++++++++++++++++
libebl/eblopenbackend.c | 2 +
libelf/libelfP.h | 3 ++
6 files changed, 217 insertions(+), 2 deletions(-)
create mode 100644 backends/mips_init.c
create mode 100644 backends/mips_reloc.def
create mode 100644 backends/mips_symbol.c
diff --git a/backends/Makefile.am b/backends/Makefile.am
index bbb2aac79ab8..b946fd30495f 100644
--- a/backends/Makefile.am
+++ b/backends/Makefile.am
@@ -37,7 +37,7 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \
noinst_LIBRARIES = libebl_backends.a libebl_backends_pic.a
modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \
- m68k bpf riscv csky loongarch arc
+ m68k bpf riscv csky loongarch arc mips
i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \
i386_retval.c i386_regs.c i386_auxv.c \
@@ -102,12 +102,14 @@ loongarch_SRCS = loongarch_init.c loongarch_symbol.c loongarch_cfi.c \
arc_SRCS = arc_init.c arc_symbol.c
+mips_SRCS = mips_init.c mips_symbol.c
+
libebl_backends_a_SOURCES = $(i386_SRCS) $(sh_SRCS) $(x86_64_SRCS) \
$(ia64_SRCS) $(alpha_SRCS) $(arm_SRCS) \
$(aarch64_SRCS) $(sparc_SRCS) $(ppc_SRCS) \
$(ppc64_SRCS) $(s390_SRCS) \
$(m68k_SRCS) $(bpf_SRCS) $(riscv_SRCS) $(csky_SRCS) \
- $(loongarch_SRCS) $(arc_SRCS)
+ $(loongarch_SRCS) $(arc_SRCS) $(mips_SRCS)
libebl_backends_pic_a_SOURCES =
am_libebl_backends_pic_a_OBJECTS = $(libebl_backends_a_SOURCES:.c=.os)
diff --git a/backends/mips_init.c b/backends/mips_init.c
new file mode 100644
index 000000000000..cedd08ca1339
--- /dev/null
+++ b/backends/mips_init.c
@@ -0,0 +1,52 @@
+/* Initialization of MIPS specific backend library.
+ Copyright (C) 2024 CIP United Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#define BACKEND mips_
+#define RELOC_PREFIX R_MIPS_
+#include "libebl_CPU.h"
+#include "libelfP.h"
+
+#define RELOC_TYPE_ID(type) ((type) & 0xff)
+
+/* This defines the common reloc hooks based on mips_reloc.def. */
+#include "common-reloc.c"
+
+Ebl *
+mips_init (Elf *elf __attribute__ ((unused)),
+ GElf_Half machine __attribute__ ((unused)),
+ Ebl *eh)
+{
+ /* We handle it. */
+ mips_init_reloc (eh);
+ HOOK (eh, reloc_simple_type);
+ return eh;
+}
diff --git a/backends/mips_reloc.def b/backends/mips_reloc.def
new file mode 100644
index 000000000000..5120980c13eb
--- /dev/null
+++ b/backends/mips_reloc.def
@@ -0,0 +1,93 @@
+/* List the relocation types for MIPS. -*- C -*-
+ Copyright (C) 2024 CIP United Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+/* NAME, REL|EXEC|DYN */
+
+
+RELOC_TYPE (NONE, REL|EXEC|DYN)
+RELOC_TYPE (16, REL|EXEC|DYN)
+RELOC_TYPE (32, REL)
+RELOC_TYPE (REL32, REL|EXEC|DYN)
+RELOC_TYPE (26, REL|DYN)
+RELOC_TYPE (HI16, REL)
+RELOC_TYPE (LO16, REL|EXEC|DYN)
+RELOC_TYPE (GPREL16, REL|EXEC|DYN)
+RELOC_TYPE (LITERAL, REL|EXEC|DYN)
+RELOC_TYPE (GOT16, REL|EXEC|DYN)
+RELOC_TYPE (PC16, REL)
+RELOC_TYPE (CALL16, REL)
+RELOC_TYPE (GPREL32, REL)
+RELOC_TYPE (SHIFT5, REL)
+RELOC_TYPE (SHIFT6, REL)
+RELOC_TYPE (64, REL)
+RELOC_TYPE (GOT_DISP, REL)
+RELOC_TYPE (GOT_PAGE, REL)
+RELOC_TYPE (GOT_OFST, REL)
+RELOC_TYPE (GOT_HI16, REL)
+RELOC_TYPE (GOT_LO16, REL)
+RELOC_TYPE (SUB, REL)
+RELOC_TYPE (INSERT_A, REL)
+RELOC_TYPE (INSERT_B, REL)
+RELOC_TYPE (DELETE, REL)
+RELOC_TYPE (HIGHER, REL)
+RELOC_TYPE (HIGHEST, REL)
+RELOC_TYPE (CALL_HI16, REL)
+RELOC_TYPE (CALL_LO16, REL)
+RELOC_TYPE (SCN_DISP, REL)
+RELOC_TYPE (REL16, REL)
+RELOC_TYPE (ADD_IMMEDIATE, REL)
+RELOC_TYPE (PJUMP, REL)
+RELOC_TYPE (RELGOT, REL)
+RELOC_TYPE (JALR, REL)
+RELOC_TYPE (TLS_DTPMOD32, DYN)
+RELOC_TYPE (TLS_DTPREL32, REL)
+RELOC_TYPE (TLS_DTPMOD64, DYN)
+RELOC_TYPE (TLS_DTPREL64, REL)
+RELOC_TYPE (TLS_GD, REL)
+RELOC_TYPE (TLS_LDM, REL)
+RELOC_TYPE (TLS_DTPREL_HI16, REL)
+RELOC_TYPE (TLS_DTPREL_LO16, REL)
+RELOC_TYPE (TLS_GOTTPREL, REL)
+RELOC_TYPE (TLS_TPREL32, REL)
+RELOC_TYPE (TLS_TPREL64, REL)
+RELOC_TYPE (TLS_TPREL_HI16, REL)
+RELOC_TYPE (TLS_TPREL_LO16, REL)
+RELOC_TYPE (GLOB_DAT, REL)
+RELOC_TYPE (PC21_S2, REL)
+RELOC_TYPE (PC26_S2, REL)
+RELOC_TYPE (PC18_S3, REL)
+RELOC_TYPE (PC19_S2, REL)
+RELOC_TYPE (PCHI16, REL)
+RELOC_TYPE (PCLO16, REL)
+RELOC_TYPE (COPY, REL)
+RELOC_TYPE (JUMP_SLOT, REL)
+RELOC_TYPE (PC32, REL)
+RELOC_TYPE (EH, REL)
+RELOC_TYPE (GNU_REL16_S2, REL)
+RELOC_TYPE (GNU_VTINHERIT, REL)
+RELOC_TYPE (GNU_VTENTRY, REL)
diff --git a/backends/mips_symbol.c b/backends/mips_symbol.c
new file mode 100644
index 000000000000..f2a46495ed6b
--- /dev/null
+++ b/backends/mips_symbol.c
@@ -0,0 +1,63 @@
+/* MIPS specific symbolic name handling.
+ Copyright (C) 2024 CIP United Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <system.h>
+
+#include <elf.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#define BACKEND mips_
+#include "libebl_CPU.h"
+#include "libelfP.h"
+
+/* Check for the simple reloc types. */
+Elf_Type
+mips_reloc_simple_type (Ebl *ebl, int type,
+ int *addsub __attribute__ ((unused)))
+{
+ int typeNew = type;
+ if(ebl->elf->class == ELFCLASS64)
+ typeNew = ELF64_MIPS_R_TYPE1(type);
+ switch (typeNew)
+ {
+ case R_MIPS_64:
+ return ELF_T_XWORD;
+ case R_MIPS_32:
+ return ELF_T_WORD;
+ case R_MIPS_16:
+ return ELF_T_HALF;
+
+ default:
+ return ELF_T_NUM;
+ }
+}
diff --git a/libebl/eblopenbackend.c b/libebl/eblopenbackend.c
index 084a1544b286..a5f7467a09d2 100644
--- a/libebl/eblopenbackend.c
+++ b/libebl/eblopenbackend.c
@@ -57,6 +57,7 @@ Ebl *riscv_init (Elf *, GElf_Half, Ebl *);
Ebl *csky_init (Elf *, GElf_Half, Ebl *);
Ebl *loongarch_init (Elf *, GElf_Half, Ebl *);
Ebl *arc_init (Elf *, GElf_Half, Ebl *);
+Ebl *mips_init (Elf *, GElf_Half, Ebl *);
/* This table should contain the complete list of architectures as far
as the ELF specification is concerned. */
@@ -154,6 +155,7 @@ static const struct
{ csky_init, "elf_csky", "csky", 4, EM_CSKY, ELFCLASS32, ELFDATA2LSB },
{ loongarch_init, "elf_loongarch", "loongarch", 9, EM_LOONGARCH, ELFCLASS64, ELFDATA2LSB },
{ arc_init, "elf_arc", "arc", 3, EM_ARCV2, ELFCLASS32, ELFDATA2LSB },
+ { mips_init, "elf_mips", "mips", 4, EM_MIPS, 0, 0 },
};
#define nmachines (sizeof (machines) / sizeof (machines[0]))
diff --git a/libelf/libelfP.h b/libelf/libelfP.h
index ed061abb0066..bdd2cc6ac27d 100644
--- a/libelf/libelfP.h
+++ b/libelf/libelfP.h
@@ -617,4 +617,7 @@ extern void __libelf_reset_rawdata (Elf_Scn *scn, void *buf, size_t size,
#define INVALID_NDX(ndx, type, data) \
unlikely ((data)->d_size / sizeof (type) <= (unsigned int) (ndx))
+#define ELF64_MIPS_R_TYPE1(i) ((i) & 0xff)
+#define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff)
+#define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff)
#endif /* libelfP.h */
Hi Mark,
Next time I send a patch, I will add ChangeLog entry in commit message and check the added file.
Thanks,
Ying
在 2024/3/29 08:18, Mark Wielaard 写道:
> Hi Ying,
>
> On Tue, Mar 05, 2024 at 05:51:17PM +0800, Ying Huang wrote:
>> From: Ying Huang <ying.huang@oss.cipunited.com>
>>
>> Signed-off-by: Ying Huang <ying.huang@oss.cipunited.com>
>> ---
>> backends/Makefile.am | 6 +-
>> backends/mips_init.c | 52 ++++
>> backends/mips_reloc.def | 93 +++++++
>> backends/mips_symbol.c | 63 +++++
>> libebl/eblopenbackend.c | 2 +
>> libelf/libelfP.h | 3 +
>> tests/libelf.h | 541 ++++++++++++++++++++++++++++++++++++++++
> Note that this adds tests/libelf.h by accident. I see how that could
> happen, because it should have been in .gitignore. I posted a patch
> to do that:
> https://inbox.sourceware.org/elfutils-devel/20240328234308.1032110-1-mark@klomp.org/
>
> Besides that the patch looks fine. I did add a ChangeLog entry to the
> commit message. Pushed as attached.
>
> Thanks,
>
> Mark
Hi Mark,
Could you help review some other patches?
Thanks,
Ying
在 2024/3/29 08:18, Mark Wielaard 写道:
> Hi Ying,
>
> On Tue, Mar 05, 2024 at 05:51:17PM +0800, Ying Huang wrote:
>> From: Ying Huang <ying.huang@oss.cipunited.com>
>>
>> Signed-off-by: Ying Huang <ying.huang@oss.cipunited.com>
>> ---
>> backends/Makefile.am | 6 +-
>> backends/mips_init.c | 52 ++++
>> backends/mips_reloc.def | 93 +++++++
>> backends/mips_symbol.c | 63 +++++
>> libebl/eblopenbackend.c | 2 +
>> libelf/libelfP.h | 3 +
>> tests/libelf.h | 541 ++++++++++++++++++++++++++++++++++++++++
> Note that this adds tests/libelf.h by accident. I see how that could
> happen, because it should have been in .gitignore. I posted a patch
> to do that:
> https://inbox.sourceware.org/elfutils-devel/20240328234308.1032110-1-mark@klomp.org/
>
> Besides that the patch looks fine. I did add a ChangeLog entry to the
> commit message. Pushed as attached.
>
> Thanks,
>
> Mark
@@ -37,7 +37,7 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \
noinst_LIBRARIES = libebl_backends.a libebl_backends_pic.a
modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \
- m68k bpf riscv csky loongarch arc
+ m68k bpf riscv csky loongarch arc mips
i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \
i386_retval.c i386_regs.c i386_auxv.c \
@@ -102,12 +102,14 @@ loongarch_SRCS = loongarch_init.c loongarch_symbol.c loongarch_cfi.c \
arc_SRCS = arc_init.c arc_symbol.c
+mips_SRCS = mips_init.c mips_symbol.c
+
libebl_backends_a_SOURCES = $(i386_SRCS) $(sh_SRCS) $(x86_64_SRCS) \
$(ia64_SRCS) $(alpha_SRCS) $(arm_SRCS) \
$(aarch64_SRCS) $(sparc_SRCS) $(ppc_SRCS) \
$(ppc64_SRCS) $(s390_SRCS) \
$(m68k_SRCS) $(bpf_SRCS) $(riscv_SRCS) $(csky_SRCS) \
- $(loongarch_SRCS) $(arc_SRCS)
+ $(loongarch_SRCS) $(arc_SRCS) $(mips_SRCS)
libebl_backends_pic_a_SOURCES =
am_libebl_backends_pic_a_OBJECTS = $(libebl_backends_a_SOURCES:.c=.os)
new file mode 100644
@@ -0,0 +1,52 @@
+/* Initialization of MIPS specific backend library.
+ Copyright (C) 2024 CIP United Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#define BACKEND mips_
+#define RELOC_PREFIX R_MIPS_
+#include "libebl_CPU.h"
+#include "libelfP.h"
+
+#define RELOC_TYPE_ID(type) ((type) & 0xff)
+
+/* This defines the common reloc hooks based on mips_reloc.def. */
+#include "common-reloc.c"
+
+Ebl *
+mips_init (Elf *elf __attribute__ ((unused)),
+ GElf_Half machine __attribute__ ((unused)),
+ Ebl *eh)
+{
+ /* We handle it. */
+ mips_init_reloc (eh);
+ HOOK (eh, reloc_simple_type);
+ return eh;
+}
new file mode 100644
@@ -0,0 +1,93 @@
+/* List the relocation types for MIPS. -*- C -*-
+ Copyright (C) 2024 CIP United Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+/* NAME, REL|EXEC|DYN */
+
+
+RELOC_TYPE (NONE, REL|EXEC|DYN)
+RELOC_TYPE (16, REL|EXEC|DYN)
+RELOC_TYPE (32, REL)
+RELOC_TYPE (REL32, REL|EXEC|DYN)
+RELOC_TYPE (26, REL|DYN)
+RELOC_TYPE (HI16, REL)
+RELOC_TYPE (LO16, REL|EXEC|DYN)
+RELOC_TYPE (GPREL16, REL|EXEC|DYN)
+RELOC_TYPE (LITERAL, REL|EXEC|DYN)
+RELOC_TYPE (GOT16, REL|EXEC|DYN)
+RELOC_TYPE (PC16, REL)
+RELOC_TYPE (CALL16, REL)
+RELOC_TYPE (GPREL32, REL)
+RELOC_TYPE (SHIFT5, REL)
+RELOC_TYPE (SHIFT6, REL)
+RELOC_TYPE (64, REL)
+RELOC_TYPE (GOT_DISP, REL)
+RELOC_TYPE (GOT_PAGE, REL)
+RELOC_TYPE (GOT_OFST, REL)
+RELOC_TYPE (GOT_HI16, REL)
+RELOC_TYPE (GOT_LO16, REL)
+RELOC_TYPE (SUB, REL)
+RELOC_TYPE (INSERT_A, REL)
+RELOC_TYPE (INSERT_B, REL)
+RELOC_TYPE (DELETE, REL)
+RELOC_TYPE (HIGHER, REL)
+RELOC_TYPE (HIGHEST, REL)
+RELOC_TYPE (CALL_HI16, REL)
+RELOC_TYPE (CALL_LO16, REL)
+RELOC_TYPE (SCN_DISP, REL)
+RELOC_TYPE (REL16, REL)
+RELOC_TYPE (ADD_IMMEDIATE, REL)
+RELOC_TYPE (PJUMP, REL)
+RELOC_TYPE (RELGOT, REL)
+RELOC_TYPE (JALR, REL)
+RELOC_TYPE (TLS_DTPMOD32, DYN)
+RELOC_TYPE (TLS_DTPREL32, REL)
+RELOC_TYPE (TLS_DTPMOD64, DYN)
+RELOC_TYPE (TLS_DTPREL64, REL)
+RELOC_TYPE (TLS_GD, REL)
+RELOC_TYPE (TLS_LDM, REL)
+RELOC_TYPE (TLS_DTPREL_HI16, REL)
+RELOC_TYPE (TLS_DTPREL_LO16, REL)
+RELOC_TYPE (TLS_GOTTPREL, REL)
+RELOC_TYPE (TLS_TPREL32, REL)
+RELOC_TYPE (TLS_TPREL64, REL)
+RELOC_TYPE (TLS_TPREL_HI16, REL)
+RELOC_TYPE (TLS_TPREL_LO16, REL)
+RELOC_TYPE (GLOB_DAT, REL)
+RELOC_TYPE (PC21_S2, REL)
+RELOC_TYPE (PC26_S2, REL)
+RELOC_TYPE (PC18_S3, REL)
+RELOC_TYPE (PC19_S2, REL)
+RELOC_TYPE (PCHI16, REL)
+RELOC_TYPE (PCLO16, REL)
+RELOC_TYPE (COPY, REL)
+RELOC_TYPE (JUMP_SLOT, REL)
+RELOC_TYPE (PC32, REL)
+RELOC_TYPE (EH, REL)
+RELOC_TYPE (GNU_REL16_S2, REL)
+RELOC_TYPE (GNU_VTINHERIT, REL)
+RELOC_TYPE (GNU_VTENTRY, REL)
new file mode 100644
@@ -0,0 +1,63 @@
+/* MIPS specific symbolic name handling.
+ Copyright (C) 2024 CIP United Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <system.h>
+
+#include <elf.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#define BACKEND mips_
+#include "libebl_CPU.h"
+#include "libelfP.h"
+
+/* Check for the simple reloc types. */
+Elf_Type
+mips_reloc_simple_type (Ebl *ebl, int type,
+ int *addsub __attribute__ ((unused)))
+{
+ int typeNew = type;
+ if(ebl->elf->class == ELFCLASS64)
+ typeNew = ELF64_MIPS_R_TYPE1(type);
+ switch (typeNew)
+ {
+ case R_MIPS_64:
+ return ELF_T_XWORD;
+ case R_MIPS_32:
+ return ELF_T_WORD;
+ case R_MIPS_16:
+ return ELF_T_HALF;
+
+ default:
+ return ELF_T_NUM;
+ }
+}
@@ -57,6 +57,7 @@ Ebl *riscv_init (Elf *, GElf_Half, Ebl *);
Ebl *csky_init (Elf *, GElf_Half, Ebl *);
Ebl *loongarch_init (Elf *, GElf_Half, Ebl *);
Ebl *arc_init (Elf *, GElf_Half, Ebl *);
+Ebl *mips_init (Elf *, GElf_Half, Ebl *);
/* This table should contain the complete list of architectures as far
as the ELF specification is concerned. */
@@ -154,6 +155,7 @@ static const struct
{ csky_init, "elf_csky", "csky", 4, EM_CSKY, ELFCLASS32, ELFDATA2LSB },
{ loongarch_init, "elf_loongarch", "loongarch", 9, EM_LOONGARCH, ELFCLASS64, ELFDATA2LSB },
{ arc_init, "elf_arc", "arc", 3, EM_ARCV2, ELFCLASS32, ELFDATA2LSB },
+ { mips_init, "elf_mips", "mips", 4, EM_MIPS, 0, 0 },
};
#define nmachines (sizeof (machines) / sizeof (machines[0]))
@@ -617,4 +617,7 @@ extern void __libelf_reset_rawdata (Elf_Scn *scn, void *buf, size_t size,
#define INVALID_NDX(ndx, type, data) \
unlikely ((data)->d_size / sizeof (type) <= (unsigned int) (ndx))
+#define ELF64_MIPS_R_TYPE1(i) ((i) & 0xff)
+#define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff)
+#define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff)
#endif /* libelfP.h */
new file mode 100644
@@ -0,0 +1,541 @@
+/* Interface for libelf.
+ Copyright (C) 1998-2010, 2015 Red Hat, Inc.
+ This file is part of elfutils.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ elfutils is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef _LIBELF_H
+#define _LIBELF_H 1
+
+#include <stdint.h>
+#include <sys/types.h>
+
+/* Get the ELF types. */
+#include <elf.h>
+
+#ifndef SHF_COMPRESSED
+ /* Older glibc elf.h might not yet define the ELF compression types. */
+ #define SHF_COMPRESSED (1 << 11) /* Section with compressed data. */
+
+ /* Section compression header. Used when SHF_COMPRESSED is set. */
+
+ typedef struct
+ {
+ Elf32_Word ch_type; /* Compression format. */
+ Elf32_Word ch_size; /* Uncompressed data size. */
+ Elf32_Word ch_addralign; /* Uncompressed data alignment. */
+ } Elf32_Chdr;
+
+ typedef struct
+ {
+ Elf64_Word ch_type; /* Compression format. */
+ Elf64_Word ch_reserved;
+ Elf64_Xword ch_size; /* Uncompressed data size. */
+ Elf64_Xword ch_addralign; /* Uncompressed data alignment. */
+ } Elf64_Chdr;
+
+ /* Legal values for ch_type (compression algorithm). */
+ #define ELFCOMPRESS_ZLIB 1 /* ZLIB/DEFLATE algorithm. */
+ #define ELFCOMPRESS_LOOS 0x60000000 /* Start of OS-specific. */
+ #define ELFCOMPRESS_HIOS 0x6fffffff /* End of OS-specific. */
+ #define ELFCOMPRESS_LOPROC 0x70000000 /* Start of processor-specific. */
+ #define ELFCOMPRESS_HIPROC 0x7fffffff /* End of processor-specific. */
+#endif
+
+#ifndef ELFCOMPRESS_ZSTD
+ /* So ZSTD compression can be used even with an old system elf.h. */
+ #define ELFCOMPRESS_ZSTD 2 /* Zstandard algorithm. */
+#endif
+
+#ifndef SHT_RELR
+ /* So RELR defines/typedefs can be used even with an old system elf.h. */
+ #define SHT_RELR 19 /* RELR relative relocations */
+
+ /* RELR relocation table entry */
+ typedef Elf32_Word Elf32_Relr;
+ typedef Elf64_Xword Elf64_Relr;
+
+ #define DT_RELRSZ 35 /* Total size of RELR relative relocations */
+ #define DT_RELR 36 /* Address of RELR relative relocations */
+ #define DT_RELRENT 37 /* Size of one RELR relative relocaction */
+#endif
+
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
+# define __nonnull_attribute__(...) __attribute__ ((__nonnull__ (__VA_ARGS__)))
+# define __deprecated_attribute__ __attribute__ ((__deprecated__))
+# define __pure_attribute__ __attribute__ ((__pure__))
+# define __const_attribute__ __attribute__ ((__const__))
+#else
+# define __nonnull_attribute__(...)
+# define __deprecated_attribute__
+# define __pure_attribute__
+# define __const_attribute__
+#endif
+
+#if __GNUC__ < 4
+#define __noreturn_attribute__
+#else
+#define __noreturn_attribute__ __attribute__ ((noreturn))
+#endif
+
+#ifdef __GNUC_STDC_INLINE__
+# define __libdw_extern_inline extern __inline __attribute__ ((__gnu_inline__))
+#else
+# define __libdw_extern_inline extern __inline
+#endif
+
+/* Known translation types. */
+typedef enum
+{
+ ELF_T_BYTE, /* unsigned char */
+ ELF_T_ADDR, /* Elf32_Addr, Elf64_Addr, ... */
+ ELF_T_DYN, /* Dynamic section record. */
+ ELF_T_EHDR, /* ELF header. */
+ ELF_T_HALF, /* Elf32_Half, Elf64_Half, ... */
+ ELF_T_OFF, /* Elf32_Off, Elf64_Off, ... */
+ ELF_T_PHDR, /* Program header. */
+ ELF_T_RELA, /* Relocation entry with addend. */
+ ELF_T_REL, /* Relocation entry. */
+ ELF_T_SHDR, /* Section header. */
+ ELF_T_SWORD, /* Elf32_Sword, Elf64_Sword, ... */
+ ELF_T_SYM, /* Symbol record. */
+ ELF_T_WORD, /* Elf32_Word, Elf64_Word, ... */
+ ELF_T_XWORD, /* Elf32_Xword, Elf64_Xword, ... */
+ ELF_T_SXWORD, /* Elf32_Sxword, Elf64_Sxword, ... */
+ ELF_T_VDEF, /* Elf32_Verdef, Elf64_Verdef, ... */
+ ELF_T_VDAUX, /* Elf32_Verdaux, Elf64_Verdaux, ... */
+ ELF_T_VNEED, /* Elf32_Verneed, Elf64_Verneed, ... */
+ ELF_T_VNAUX, /* Elf32_Vernaux, Elf64_Vernaux, ... */
+ ELF_T_NHDR, /* Elf32_Nhdr, Elf64_Nhdr, ... */
+ ELF_T_SYMINFO, /* Elf32_Syminfo, Elf64_Syminfo, ... */
+ ELF_T_MOVE, /* Elf32_Move, Elf64_Move, ... */
+ ELF_T_LIB, /* Elf32_Lib, Elf64_Lib, ... */
+ ELF_T_GNUHASH, /* GNU-style hash section. */
+ ELF_T_AUXV, /* Elf32_auxv_t, Elf64_auxv_t, ... */
+ ELF_T_CHDR, /* Compressed, Elf32_Chdr, Elf64_Chdr, ... */
+ ELF_T_NHDR8, /* Special GNU Properties note. Same as Nhdr,
+ except padding. */
+ ELF_T_RELR, /* Relative relocation entry. */
+ /* Keep this the last entry. */
+ ELF_T_NUM
+} Elf_Type;
+
+/* Descriptor for data to be converted to or from memory format. */
+typedef struct
+{
+ void *d_buf; /* Pointer to the actual data. */
+ Elf_Type d_type; /* Type of this piece of data. */
+ unsigned int d_version; /* ELF version. */
+ size_t d_size; /* Size in bytes. */
+ int64_t d_off; /* Offset into section. */
+ size_t d_align; /* Alignment in section. */
+} Elf_Data;
+
+
+/* Commands for `...'. */
+typedef enum
+{
+ ELF_C_NULL, /* Nothing, terminate, or compute only. */
+ ELF_C_READ, /* Read .. */
+ ELF_C_RDWR, /* Read and write .. */
+ ELF_C_WRITE, /* Write .. */
+ ELF_C_CLR, /* Clear flag. */
+ ELF_C_SET, /* Set flag. */
+ ELF_C_FDDONE, /* Signal that file descriptor will not be
+ used anymore. */
+ ELF_C_FDREAD, /* Read rest of data so that file descriptor
+ is not used anymore. */
+ /* The following are extensions. */
+ ELF_C_READ_MMAP, /* Read, but mmap the file if possible. */
+ ELF_C_RDWR_MMAP, /* Read and write, with mmap. */
+ ELF_C_WRITE_MMAP, /* Write, with mmap. */
+ ELF_C_READ_MMAP_PRIVATE, /* Read, but memory is writable, results are
+ not written to the file. */
+ ELF_C_EMPTY, /* Copy basic file data but not the content. */
+ /* Keep this the last entry. */
+ ELF_C_NUM
+} Elf_Cmd;
+
+
+/* Flags for the ELF structures. */
+enum
+{
+ ELF_F_DIRTY = 0x1,
+#define ELF_F_DIRTY ELF_F_DIRTY
+ ELF_F_LAYOUT = 0x4,
+#define ELF_F_LAYOUT ELF_F_LAYOUT
+ ELF_F_PERMISSIVE = 0x8
+#define ELF_F_PERMISSIVE ELF_F_PERMISSIVE
+};
+
+/* Flags for elf_compress[_gnu]. */
+enum
+{
+ ELF_CHF_FORCE = 0x1
+#define ELF_CHF_FORCE ELF_CHF_FORCE
+};
+
+/* Identification values for recognized object files. */
+typedef enum
+{
+ ELF_K_NONE, /* Unknown. */
+ ELF_K_AR, /* Archive. */
+ ELF_K_COFF, /* Stupid old COFF. */
+ ELF_K_ELF, /* ELF file. */
+ /* Keep this the last entry. */
+ ELF_K_NUM
+} Elf_Kind;
+
+
+/* Archive member header. */
+typedef struct
+{
+ char *ar_name; /* Name of archive member. */
+ time_t ar_date; /* File date. */
+ uid_t ar_uid; /* User ID. */
+ gid_t ar_gid; /* Group ID. */
+ mode_t ar_mode; /* File mode. */
+ int64_t ar_size; /* File size. */
+ char *ar_rawname; /* Original name of archive member. */
+} Elf_Arhdr;
+
+
+/* Archive symbol table entry. */
+typedef struct
+{
+ char *as_name; /* Symbol name. */
+ size_t as_off; /* Offset for this file in the archive. */
+ unsigned long int as_hash; /* Hash value of the name. */
+} Elf_Arsym;
+
+
+/* Descriptor for the ELF file. */
+typedef struct Elf Elf;
+
+/* Descriptor for ELF file section. */
+typedef struct Elf_Scn Elf_Scn;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Return descriptor for ELF file to work according to CMD. */
+extern Elf *elf_begin (int __fildes, Elf_Cmd __cmd, Elf *__ref);
+
+/* Create a clone of an existing ELF descriptor. */
+ extern Elf *elf_clone (Elf *__elf, Elf_Cmd __cmd);
+
+/* Create descriptor for memory region. */
+extern Elf *elf_memory (char *__image, size_t __size);
+
+/* Advance archive descriptor to next element. */
+extern Elf_Cmd elf_next (Elf *__elf);
+
+/* Free resources allocated for ELF. */
+extern int elf_end (Elf *__elf);
+
+/* Update ELF descriptor and write file to disk. */
+extern int64_t elf_update (Elf *__elf, Elf_Cmd __cmd);
+
+/* Determine what kind of file is associated with ELF. */
+extern Elf_Kind elf_kind (Elf *__elf) __pure_attribute__;
+
+/* Get the base offset for an object file. */
+extern int64_t elf_getbase (Elf *__elf);
+
+
+/* Retrieve file identification data. */
+extern char *elf_getident (Elf *__elf, size_t *__nbytes);
+
+/* Retrieve class-dependent object file header. */
+extern Elf32_Ehdr *elf32_getehdr (Elf *__elf);
+/* Similar but this time the binary calls is ELFCLASS64. */
+extern Elf64_Ehdr *elf64_getehdr (Elf *__elf);
+
+/* Create ELF header if none exists. */
+extern Elf32_Ehdr *elf32_newehdr (Elf *__elf);
+/* Similar but this time the binary calls is ELFCLASS64. */
+extern Elf64_Ehdr *elf64_newehdr (Elf *__elf);
+
+/* Get the number of program headers in the ELF file. If the file uses
+ more headers than can be represented in the e_phnum field of the ELF
+ header the information from the sh_info field in the zeroth section
+ header is used. */
+extern int elf_getphdrnum (Elf *__elf, size_t *__dst);
+
+/* Retrieve class-dependent program header table. */
+extern Elf32_Phdr *elf32_getphdr (Elf *__elf);
+/* Similar but this time the binary calls is ELFCLASS64. */
+extern Elf64_Phdr *elf64_getphdr (Elf *__elf);
+
+/* Create ELF program header. */
+extern Elf32_Phdr *elf32_newphdr (Elf *__elf, size_t __cnt);
+/* Similar but this time the binary calls is ELFCLASS64. */
+extern Elf64_Phdr *elf64_newphdr (Elf *__elf, size_t __cnt);
+
+
+/* Get section at INDEX. */
+extern Elf_Scn *elf_getscn (Elf *__elf, size_t __index);
+
+/* Get section at OFFSET. */
+extern Elf_Scn *elf32_offscn (Elf *__elf, Elf32_Off __offset);
+/* Similar but this time the binary calls is ELFCLASS64. */
+extern Elf_Scn *elf64_offscn (Elf *__elf, Elf64_Off __offset);
+
+/* Get index of section. */
+extern size_t elf_ndxscn (Elf_Scn *__scn);
+
+/* Get section with next section index. */
+extern Elf_Scn *elf_nextscn (Elf *__elf, Elf_Scn *__scn);
+
+/* Create a new section and append it at the end of the table. */
+extern Elf_Scn *elf_newscn (Elf *__elf);
+
+/* Get the section index of the extended section index table for the
+ given symbol table. */
+extern int elf_scnshndx (Elf_Scn *__scn);
+
+/* Get the number of sections in the ELF file. If the file uses more
+ sections than can be represented in the e_shnum field of the ELF
+ header the information from the sh_size field in the zeroth section
+ header is used. */
+extern int elf_getshdrnum (Elf *__elf, size_t *__dst);
+/* Sun messed up the implementation of 'elf_getshnum' in their implementation.
+ It was agreed to make the same functionality available under a different
+ name and obsolete the old name. */
+extern int elf_getshnum (Elf *__elf, size_t *__dst)
+ __deprecated_attribute__;
+
+
+/* Get the section index of the section header string table in the ELF
+ file. If the index cannot be represented in the e_shstrndx field of
+ the ELF header the information from the sh_link field in the zeroth
+ section header is used. */
+extern int elf_getshdrstrndx (Elf *__elf, size_t *__dst);
+/* Sun messed up the implementation of 'elf_getshstrndx' in their
+ implementation. It was agreed to make the same functionality available
+ under a different name and obsolete the old name. */
+extern int elf_getshstrndx (Elf *__elf, size_t *__dst)
+ __deprecated_attribute__;
+
+
+/* Retrieve section header of ELFCLASS32 binary. */
+extern Elf32_Shdr *elf32_getshdr (Elf_Scn *__scn);
+/* Similar for ELFCLASS64. */
+extern Elf64_Shdr *elf64_getshdr (Elf_Scn *__scn);
+
+/* Returns compression header for a section if section data is
+ compressed. Returns NULL and sets elf_errno if the section isn't
+ compressed or an error occurred. */
+extern Elf32_Chdr *elf32_getchdr (Elf_Scn *__scn);
+extern Elf64_Chdr *elf64_getchdr (Elf_Scn *__scn);
+
+/* Compress or decompress the data of a section and adjust the section
+ header.
+
+ elf_compress works by setting or clearing the SHF_COMPRESS flag
+ from the section Shdr and will encode or decode a Elf32_Chdr or
+ Elf64_Chdr at the start of the section data. elf_compress_gnu will
+ encode or decode any section, but is traditionally only used for
+ sections that have a name starting with ".debug" when
+ uncompressed or ".zdebug" when compressed and stores just the
+ uncompressed size. The GNU compression method is deprecated and
+ should only be used for legacy support.
+
+ elf_compress takes a compression type that should be either zero to
+ decompress or an ELFCOMPRESS algorithm to use for compression.
+ Currently ELFCOMPRESS_ZLIB and ELFCOMPRESS_ZSTD are supported.
+ elf_compress_gnu will compress in the traditional GNU compression
+ format when compress is one and decompress the section data when
+ compress is zero.
+
+ The FLAGS argument can be zero or ELF_CHF_FORCE. If FLAGS contains
+ ELF_CHF_FORCE then it will always compress the section, even if
+ that would not reduce the size of the data section (including the
+ header). Otherwise elf_compress and elf_compress_gnu will compress
+ the section only if the total data size is reduced.
+
+ On successful compression or decompression the function returns
+ one. If (not forced) compression is requested and the data section
+ would not actually reduce in size, the section is not actually
+ compressed and zero is returned. Otherwise -1 is returned and
+ elf_errno is set.
+
+ It is an error to request compression for a section that already
+ has SHF_COMPRESSED set, or (for elf_compress) to request
+ decompression for an section that doesn't have SHF_COMPRESSED set.
+ If a section has SHF_COMPRESSED set then calling elf_compress_gnu
+ will result in an error. The section has to be decompressed first
+ using elf_compress. Calling elf_compress on a section compressed
+ with elf_compress_gnu is fine, but probably useless.
+
+ It is always an error to call these functions on SHT_NOBITS
+ sections or if the section has the SHF_ALLOC flag set.
+ elf_compress_gnu will not check whether the section name starts
+ with ".debug" or .zdebug". It is the responsibility of the caller
+ to make sure the deprecated GNU compression method is only called
+ on correctly named sections (and to change the name of the section
+ when using elf_compress_gnu).
+
+ All previous returned Shdrs and Elf_Data buffers are invalidated by
+ this call and should no longer be accessed.
+
+ Note that although this changes the header and data returned it
+ doesn't mark the section as dirty. To keep the changes when
+ calling elf_update the section has to be flagged ELF_F_DIRTY. */
+extern int elf_compress (Elf_Scn *scn, int type, unsigned int flags);
+extern int elf_compress_gnu (Elf_Scn *scn, int compress, unsigned int flags);
+
+/* Set or clear flags for ELF file. */
+extern unsigned int elf_flagelf (Elf *__elf, Elf_Cmd __cmd,
+ unsigned int __flags);
+/* Similarly for the ELF header. */
+extern unsigned int elf_flagehdr (Elf *__elf, Elf_Cmd __cmd,
+ unsigned int __flags);
+/* Similarly for the ELF program header. */
+extern unsigned int elf_flagphdr (Elf *__elf, Elf_Cmd __cmd,
+ unsigned int __flags);
+/* Similarly for the given ELF section. */
+extern unsigned int elf_flagscn (Elf_Scn *__scn, Elf_Cmd __cmd,
+ unsigned int __flags);
+/* Similarly for the given ELF data. */
+extern unsigned int elf_flagdata (Elf_Data *__data, Elf_Cmd __cmd,
+ unsigned int __flags);
+/* Similarly for the given ELF section header. */
+extern unsigned int elf_flagshdr (Elf_Scn *__scn, Elf_Cmd __cmd,
+ unsigned int __flags);
+
+
+/* Get data from section while translating from file representation to
+ memory representation. The Elf_Data d_type is set based on the
+ section type if known. Otherwise d_type is set to ELF_T_BYTE. If
+ the section contains compressed data then d_type is always set to
+ ELF_T_CHDR. */
+extern Elf_Data *elf_getdata (Elf_Scn *__scn, Elf_Data *__data);
+
+/* Get uninterpreted section content. */
+extern Elf_Data *elf_rawdata (Elf_Scn *__scn, Elf_Data *__data);
+
+/* Create new data descriptor for section SCN. */
+extern Elf_Data *elf_newdata (Elf_Scn *__scn);
+
+/* Get data translated from a chunk of the file contents as section data
+ would be for TYPE. The resulting Elf_Data pointer is valid until
+ elf_end (ELF) is called. */
+extern Elf_Data *elf_getdata_rawchunk (Elf *__elf,
+ int64_t __offset, size_t __size,
+ Elf_Type __type);
+
+
+/* Return pointer to string at OFFSET in section INDEX. */
+extern char *elf_strptr (Elf *__elf, size_t __index, size_t __offset);
+
+
+/* Return header of archive. */
+extern Elf_Arhdr *elf_getarhdr (Elf *__elf);
+
+/* Return offset in archive for current file ELF. */
+extern int64_t elf_getaroff (Elf *__elf);
+
+/* Select archive element at OFFSET. */
+extern size_t elf_rand (Elf *__elf, size_t __offset);
+
+/* Get symbol table of archive. */
+extern Elf_Arsym *elf_getarsym (Elf *__elf, size_t *__narsyms);
+
+
+/* Control ELF descriptor. */
+extern int elf_cntl (Elf *__elf, Elf_Cmd __cmd);
+
+/* Retrieve uninterpreted file contents. */
+extern char *elf_rawfile (Elf *__elf, size_t *__nbytes);
+
+
+/* Return size of array of COUNT elements of the type denoted by TYPE
+ in the external representation. The binary class is taken from ELF.
+ The result is based on version VERSION of the ELF standard. */
+extern size_t elf32_fsize (Elf_Type __type, size_t __count,
+ unsigned int __version)
+ __const_attribute__;
+/* Similar but this time the binary calls is ELFCLASS64. */
+extern size_t elf64_fsize (Elf_Type __type, size_t __count,
+ unsigned int __version)
+ __const_attribute__;
+
+
+/* Convert data structure from the representation in the file represented
+ by ELF to their memory representation. */
+extern Elf_Data *elf32_xlatetom (Elf_Data *__dest, const Elf_Data *__src,
+ unsigned int __encode);
+/* Same for 64 bit class. */
+extern Elf_Data *elf64_xlatetom (Elf_Data *__dest, const Elf_Data *__src,
+ unsigned int __encode);
+
+/* Convert data structure from to the representation in memory
+ represented by ELF file representation. */
+extern Elf_Data *elf32_xlatetof (Elf_Data *__dest, const Elf_Data *__src,
+ unsigned int __encode);
+/* Same for 64 bit class. */
+extern Elf_Data *elf64_xlatetof (Elf_Data *__dest, const Elf_Data *__src,
+ unsigned int __encode);
+
+
+/* Return error code of last failing function call. This value is kept
+ separately for each thread. */
+extern int elf_errno (void);
+
+/* Return error string for ERROR. If ERROR is zero, return error string
+ for most recent error or NULL is none occurred. If ERROR is -1 the
+ behaviour is similar to the last case except that not NULL but a legal
+ string is returned. */
+extern const char *elf_errmsg (int __error);
+
+
+/* Coordinate ELF library and application versions. */
+extern unsigned int elf_version (unsigned int __version);
+
+/* Set fill bytes used to fill holes in data structures. */
+extern void elf_fill (int __fill);
+
+/* Compute hash value. */
+extern unsigned long int elf_hash (const char *__string)
+ __pure_attribute__;
+
+/* Compute hash value using the GNU-specific hash function. */
+extern unsigned long int elf_gnu_hash (const char *__string)
+ __pure_attribute__;
+
+
+/* Compute simple checksum from permanent parts of the ELF file. */
+extern long int elf32_checksum (Elf *__elf);
+/* Similar but this time the binary calls is ELFCLASS64. */
+extern long int elf64_checksum (Elf *__elf);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* libelf.h */