From patchwork Wed Jun 14 18:30:38 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Palmer Dabbelt X-Patchwork-Id: 21013 Received: (qmail 97735 invoked by alias); 14 Jun 2017 18:33:12 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 97629 invoked by uid 89); 14 Jun 2017 18:33:11 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-24.2 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, RCVD_IN_DNSWL_NONE, SPF_PASS, UNSUBSCRIBE_BODY autolearn=ham version=3.3.2 spammy=Macros X-HELO: mail-pf0-f178.google.com X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:cc:cc:cc:subject:date:message-id :in-reply-to:references; bh=FN5+7inecUMWjSkbS3BTqKscd7iLKYvUoAcywFc6qVQ=; b=dvlDw5FdwO4ZxGUTK6wHnfAPvJ4ImMSSckxd2Z/W9EytjOEKTAZU+N9Ljcl0tV1T0L n1Oc3PgVUxazcG0gysXzK/dZLQn/UW00onMfuSKEd6DQYacC2A4qEmXu1nT7HsBI2yM3 59KUJbbIEUm5akwVCsJt9FmUt0OGJqivqBgt59CTLLCDR6+RiEfdwr4xMoF6AugW85Y4 9Vc+vFFlxMEIlGcd/B1CcX5wCpIJ5YBIRsENR7QyaGHwn4kcpy1rf0ZNJ7GhA903u2V5 GzHv2wvHEkCf9tpgJbkud+5CGF1Wocs7jvElx53Uq4J8weQmdfhipnyaSvwz29AFl8O3 gNKA== X-Gm-Message-State: AKS2vOz0fBMxKMKaBNjtEq6mPxTEOoCU3vQJMlo3QhnLUHLIBhmG9zox hLsop1TcH2D9qObEP54iSQ== X-Received: by 10.84.128.33 with SMTP id 30mr1613805pla.38.1497465187617; Wed, 14 Jun 2017 11:33:07 -0700 (PDT) From: Palmer Dabbelt To: libc-alpha@sourceware.org Cc: Andrew Waterman Cc: patches@groups.riscv.org Cc: Darius Rad Cc: Palmer Dabbelt Subject: [PATCH 02/12] RISC-V: ABI Implementation Date: Wed, 14 Jun 2017 11:30:38 -0700 Message-Id: <20170614183048.11040-3-palmer@dabbelt.com> In-Reply-To: <20170614183048.11040-1-palmer@dabbelt.com> References: <20170614183048.11040-1-palmer@dabbelt.com> This patch contains code that needs to directly know about the RISC-V ABI, which is specified in a work-in-progress psABI document: https://github.com/riscv/riscv-elf-psabi-doc/blob/master/riscv-elf.md This is meant to contain all the RISC-V code that needs to explicitly name registers or manage in-memory structure layout. This does not contain any of the Linux-specific code. --- sysdeps/riscv/__longjmp.S | 58 +++++++++++++++++ sysdeps/riscv/bits/endian.h | 5 ++ sysdeps/riscv/bits/setjmp.h | 38 +++++++++++ sysdeps/riscv/bits/wordsize.h | 31 +++++++++ sysdeps/riscv/bsd-_setjmp.c | 1 + sysdeps/riscv/bsd-setjmp.c | 1 + sysdeps/riscv/dl-trampoline.S | 44 +++++++++++++ sysdeps/riscv/gccframe.h | 22 +++++++ sysdeps/riscv/jmpbuf-unwind.h | 46 +++++++++++++ sysdeps/riscv/machine-gmon.h | 34 ++++++++++ sysdeps/riscv/memusage.h | 21 ++++++ sysdeps/riscv/nptl/sysdep-cancel.h | 129 +++++++++++++++++++++++++++++++++++++ sysdeps/riscv/setjmp.S | 75 +++++++++++++++++++++ sysdeps/riscv/sys/asm.h | 79 +++++++++++++++++++++++ 14 files changed, 584 insertions(+) create mode 100644 sysdeps/riscv/__longjmp.S create mode 100644 sysdeps/riscv/bits/endian.h create mode 100644 sysdeps/riscv/bits/setjmp.h create mode 100644 sysdeps/riscv/bits/wordsize.h create mode 100644 sysdeps/riscv/bsd-_setjmp.c create mode 100644 sysdeps/riscv/bsd-setjmp.c create mode 100644 sysdeps/riscv/dl-trampoline.S create mode 100644 sysdeps/riscv/gccframe.h create mode 100644 sysdeps/riscv/jmpbuf-unwind.h create mode 100644 sysdeps/riscv/machine-gmon.h create mode 100644 sysdeps/riscv/memusage.h create mode 100644 sysdeps/riscv/nptl/sysdep-cancel.h create mode 100644 sysdeps/riscv/setjmp.S create mode 100644 sysdeps/riscv/sys/asm.h diff --git a/sysdeps/riscv/__longjmp.S b/sysdeps/riscv/__longjmp.S new file mode 100644 index 0000000000..06382660a8 --- /dev/null +++ b/sysdeps/riscv/__longjmp.S @@ -0,0 +1,58 @@ +/* Copyright (C) 1996, 1997, 2000, 2002-2004, 2017 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include + +ENTRY (__longjmp) + REG_L ra, 0*SZREG(a0) + REG_L s0, 1*SZREG(a0) + REG_L s1, 2*SZREG(a0) + REG_L s2, 3*SZREG(a0) + REG_L s3, 4*SZREG(a0) + REG_L s4, 5*SZREG(a0) + REG_L s5, 6*SZREG(a0) + REG_L s6, 7*SZREG(a0) + REG_L s7, 8*SZREG(a0) + REG_L s8, 9*SZREG(a0) + REG_L s9, 10*SZREG(a0) + REG_L s10,11*SZREG(a0) + REG_L s11,12*SZREG(a0) + REG_L sp, 13*SZREG(a0) + +#ifndef __riscv_float_abi_soft + FREG_L fs0, 14*SZREG+ 0*SZFREG(a0) + FREG_L fs1, 14*SZREG+ 1*SZFREG(a0) + FREG_L fs2, 14*SZREG+ 2*SZFREG(a0) + FREG_L fs3, 14*SZREG+ 3*SZFREG(a0) + FREG_L fs4, 14*SZREG+ 4*SZFREG(a0) + FREG_L fs5, 14*SZREG+ 5*SZFREG(a0) + FREG_L fs6, 14*SZREG+ 6*SZFREG(a0) + FREG_L fs7, 14*SZREG+ 7*SZFREG(a0) + FREG_L fs8, 14*SZREG+ 8*SZFREG(a0) + FREG_L fs9, 14*SZREG+ 9*SZFREG(a0) + FREG_L fs10,14*SZREG+10*SZFREG(a0) + FREG_L fs11,14*SZREG+11*SZFREG(a0) +#endif + + seqz a0, a1 + add a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1 + ret + +END(__longjmp) diff --git a/sysdeps/riscv/bits/endian.h b/sysdeps/riscv/bits/endian.h new file mode 100644 index 0000000000..4aaf559d4f --- /dev/null +++ b/sysdeps/riscv/bits/endian.h @@ -0,0 +1,5 @@ +#ifndef _ENDIAN_H +# error "Never use directly; include instead." +#endif + +#define __BYTE_ORDER __LITTLE_ENDIAN diff --git a/sysdeps/riscv/bits/setjmp.h b/sysdeps/riscv/bits/setjmp.h new file mode 100644 index 0000000000..749269bd90 --- /dev/null +++ b/sysdeps/riscv/bits/setjmp.h @@ -0,0 +1,38 @@ +/* Define the machine-dependent type `jmp_buf'. RISC-V version. + Copyright (C) 2011-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _RISCV_BITS_SETJMP_H +#define _RISCV_BITS_SETJMP_H + +typedef struct __jmp_buf_internal_tag + { + /* Program counter. */ + long __pc; + /* Callee-saved registers. */ + long __regs[12]; + /* Stack pointer. */ + long __sp; + + /* Callee-saved floating point registers. + Note that there are an even number of preceding words in this struct, + so no padding will be inserted before __fpregs, even for RV32. */ + double __fpregs[12]; + } __jmp_buf[1]; + +#endif /* _RISCV_BITS_SETJMP_H */ diff --git a/sysdeps/riscv/bits/wordsize.h b/sysdeps/riscv/bits/wordsize.h new file mode 100644 index 0000000000..7cc222d337 --- /dev/null +++ b/sysdeps/riscv/bits/wordsize.h @@ -0,0 +1,31 @@ +/* Copyright (C) 2002, 2003, 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#if __riscv_xlen == (__SIZEOF_POINTER__ * 8) +# define __WORDSIZE __riscv_xlen +#else +# error unsupported ABI +#endif + +#if __riscv_xlen == 64 +# define __WORDSIZE_TIME64_COMPAT32 1 +#else +# define __WORDSIZE_TIME64_COMPAT32 0 +# define __WORDSIZE32_SIZE_ULONG 0 +# define __WORDSIZE32_PTRDIFF_LONG 0 +#endif diff --git a/sysdeps/riscv/bsd-_setjmp.c b/sysdeps/riscv/bsd-_setjmp.c new file mode 100644 index 0000000000..0d413101ce --- /dev/null +++ b/sysdeps/riscv/bsd-_setjmp.c @@ -0,0 +1 @@ +/* _setjmp is implemented in setjmp.S */ diff --git a/sysdeps/riscv/bsd-setjmp.c b/sysdeps/riscv/bsd-setjmp.c new file mode 100644 index 0000000000..ee7c5e3437 --- /dev/null +++ b/sysdeps/riscv/bsd-setjmp.c @@ -0,0 +1 @@ +/* setjmp is implemented in setjmp.S */ diff --git a/sysdeps/riscv/dl-trampoline.S b/sysdeps/riscv/dl-trampoline.S new file mode 100644 index 0000000000..3d4dd9fc8c --- /dev/null +++ b/sysdeps/riscv/dl-trampoline.S @@ -0,0 +1,44 @@ +#include +#include + +/* Assembler veneer called from the PLT header code for lazy loading. + The PLT header passes its own args in t0-t2. */ + +#define FRAME_SIZE (-((-10 * SZREG) & ALMASK)) + +ENTRY(_dl_runtime_resolve) + # Save arguments to stack. + addi sp, sp, -FRAME_SIZE + REG_S ra, 9*SZREG(sp) + REG_S a0, 1*SZREG(sp) + REG_S a1, 2*SZREG(sp) + REG_S a2, 3*SZREG(sp) + REG_S a3, 4*SZREG(sp) + REG_S a4, 5*SZREG(sp) + REG_S a5, 6*SZREG(sp) + REG_S a6, 7*SZREG(sp) + REG_S a7, 8*SZREG(sp) + + # Update .got.plt and obtain runtime address of callee. + slli a1, t1, 1 + mv a0, t0 # link map + add a1, a1, t1 # reloc offset (== thrice the .got.plt offset) + la a2, _dl_fixup + jalr a2 + mv t1, a0 + + # Restore arguments from stack. + REG_L ra, 9*SZREG(sp) + REG_L a0, 1*SZREG(sp) + REG_L a1, 2*SZREG(sp) + REG_L a2, 3*SZREG(sp) + REG_L a3, 4*SZREG(sp) + REG_L a4, 5*SZREG(sp) + REG_L a5, 6*SZREG(sp) + REG_L a6, 7*SZREG(sp) + REG_L a7, 8*SZREG(sp) + addi sp, sp, FRAME_SIZE + + # Invoke the callee. + jr t1 +END(_dl_runtime_resolve) diff --git a/sysdeps/riscv/gccframe.h b/sysdeps/riscv/gccframe.h new file mode 100644 index 0000000000..664c2c85f1 --- /dev/null +++ b/sysdeps/riscv/gccframe.h @@ -0,0 +1,22 @@ +/* Definition of object in frame unwind info. RISC-V version. + Copyright (C) 2001, 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#define FIRST_PSEUDO_REGISTER 66 + +#include diff --git a/sysdeps/riscv/jmpbuf-unwind.h b/sysdeps/riscv/jmpbuf-unwind.h new file mode 100644 index 0000000000..daf7898cb7 --- /dev/null +++ b/sysdeps/riscv/jmpbuf-unwind.h @@ -0,0 +1,46 @@ +/* Copyright (C) 2003, 2005, 2006, 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#include + +/* Test if longjmp to JMPBUF would unwind the frame + containing a local variable at ADDRESS. */ +#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \ + ((void *) (address) < (void *) demangle ((jmpbuf)[0].__sp)) + +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \ + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj) + +static inline uintptr_t __attribute__ ((unused)) +_jmpbuf_sp (__jmp_buf regs) +{ + uintptr_t sp = regs[0].__sp; +#ifdef PTR_DEMANGLE + PTR_DEMANGLE (sp); +#endif + return sp; +} + +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \ + ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj)) + +/* We use the normal longjmp for unwinding. */ +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val) diff --git a/sysdeps/riscv/machine-gmon.h b/sysdeps/riscv/machine-gmon.h new file mode 100644 index 0000000000..2ec7a34d9b --- /dev/null +++ b/sysdeps/riscv/machine-gmon.h @@ -0,0 +1,34 @@ +/* RISC-V definitions for profiling support. + Copyright (C) 1996-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +/* Accept 'frompc' address as argument from the function that calls + _mcount for profiling. Use __builtin_return_address (0) + for the 'selfpc' address. */ + +#include + +static void mcount_internal (u_long frompc, u_long selfpc); + +#define _MCOUNT_DECL(frompc, selfpc) \ +static inline void mcount_internal (u_long frompc, u_long selfpc) + +#define MCOUNT \ +void _mcount (void *frompc) \ +{ \ + mcount_internal ((u_long) frompc, (u_long) RETURN_ADDRESS (0)); \ +} diff --git a/sysdeps/riscv/memusage.h b/sysdeps/riscv/memusage.h new file mode 100644 index 0000000000..606a9e5336 --- /dev/null +++ b/sysdeps/riscv/memusage.h @@ -0,0 +1,21 @@ +/* Copyright (C) 2000, 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#define GETSP() ({ register uintptr_t stack_ptr asm ("sp"); stack_ptr; }) + +#include diff --git a/sysdeps/riscv/nptl/sysdep-cancel.h b/sysdeps/riscv/nptl/sysdep-cancel.h new file mode 100644 index 0000000000..dfa09aa9ac --- /dev/null +++ b/sysdeps/riscv/nptl/sysdep-cancel.h @@ -0,0 +1,129 @@ +/* Copyright (C) 2003-2006, 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#ifndef __ASSEMBLER__ +# include +#endif +#include + +/* Gas will put the initial save of $gp into the CIE, because it appears to + happen before any instructions. So we use cfi_same_value instead of + cfi_restore. */ + +#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt) + +# undef PSEUDO +# define PSEUDO(name, syscall_name, args) \ + .align 2; \ + L(pseudo_start): \ + 99: j __syscall_error; \ + ENTRY (name) \ + SINGLE_THREAD_P(t0); \ + bnez t0, L(pseudo_cancel); \ + .type __##syscall_name##_nocancel, @function; \ + .globl __##syscall_name##_nocancel; \ + __##syscall_name##_nocancel: \ + li a7, SYS_ify(syscall_name); \ + scall; \ + bltz a0, 99b; \ + ret; \ + .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \ + L(pseudo_cancel): \ + addi sp, sp, -STKSPACE; \ + REG_S ra, STKOFF_RA(sp); \ + cfi_rel_offset (ra, STKOFF_RA); \ + PUSHARGS_##args; /* save syscall args */ \ + CENABLE; \ + REG_S a0, STKOFF_SVMSK(sp); /* save mask */ \ + POPARGS_##args; /* restore syscall args */ \ + li a7, SYS_ify (syscall_name); \ + scall; \ + REG_S a0, STKOFF_A0(sp); /* save syscall result */ \ + REG_L a0, STKOFF_SVMSK(sp); /* pass mask as arg1 */ \ + CDISABLE; \ + REG_L ra, STKOFF_RA(sp); /* restore return address */ \ + REG_L a0, STKOFF_A0(sp); /* restore syscall result */ \ + addi sp, sp, STKSPACE; \ + bltz a0, 99b; \ + L(pseudo_end): + + +# define PUSHARGS_0 /* nothing to do */ +# define PUSHARGS_1 PUSHARGS_0 REG_S a0, STKOFF_A0(sp); cfi_rel_offset (a0, STKOFF_A0); +# define PUSHARGS_2 PUSHARGS_1 REG_S a1, STKOFF_A1(sp); cfi_rel_offset (a1, STKOFF_A1); +# define PUSHARGS_3 PUSHARGS_2 REG_S a2, STKOFF_A2(sp); cfi_rel_offset (a2, STKOFF_A2); +# define PUSHARGS_4 PUSHARGS_3 REG_S a3, STKOFF_A3(sp); cfi_rel_offset (a3, STKOFF_A3); +# define PUSHARGS_5 PUSHARGS_4 REG_S a4, STKOFF_A4(sp); cfi_rel_offset (a4, STKOFF_A4); +# define PUSHARGS_6 PUSHARGS_5 REG_S a5, STKOFF_A5(sp); cfi_rel_offset (a5, STKOFF_A5); + +# define POPARGS_0 /* nothing to do */ +# define POPARGS_1 POPARGS_0 REG_L a0, STKOFF_A0(sp); +# define POPARGS_2 POPARGS_1 REG_L a1, STKOFF_A1(sp); +# define POPARGS_3 POPARGS_2 REG_L a2, STKOFF_A2(sp); +# define POPARGS_4 POPARGS_3 REG_L a3, STKOFF_A3(sp); +# define POPARGS_5 POPARGS_4 REG_L a4, STKOFF_A4(sp); +# define POPARGS_6 POPARGS_5 REG_L a5, STKOFF_A5(sp); + +/* Avoid D$ misses by keeping less-used arguments further down stack. */ +# define STKOFF_A5 0 +# define STKOFF_A4 (STKOFF_A5 + SZREG) +# define STKOFF_A3 (STKOFF_A4 + SZREG) +# define STKOFF_A2 (STKOFF_A3 + SZREG) +# define STKOFF_A1 (STKOFF_A2 + SZREG) +# define STKOFF_A0 (STKOFF_A1 + SZREG) +# define STKOFF_SVMSK (STKOFF_A0 + SZREG) +# define STKOFF_RA (STKOFF_SVMSK + SZREG) +# define STKSPACE (STKOFF_RA + SZREG) + +# if IS_IN (libpthread) +# define CENABLE call __pthread_enable_asynccancel +# define CDISABLE call __pthread_disable_asynccancel +# elif IS_IN (librt) +# define CENABLE call __librt_enable_asynccancel +# define CDISABLE call __librt_disable_asynccancel +# else +# define CENABLE call __libc_enable_asynccancel +# define CDISABLE call __libc_disable_asynccancel +# endif + +# ifndef __ASSEMBLER__ +# define SINGLE_THREAD_P \ + __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) \ + == 0, 1) +# else +# include "tcb-offsets.h" +# define SINGLE_THREAD_P(reg) \ + lw reg, MULTIPLE_THREADS_OFFSET(tp) +#endif + +#elif !defined __ASSEMBLER__ + +# define SINGLE_THREAD_P 1 +# define NO_CANCELLATION 1 + +#endif + +#ifndef __ASSEMBLER__ +# define RTLD_SINGLE_THREAD_P \ + __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0, 1) +#endif diff --git a/sysdeps/riscv/setjmp.S b/sysdeps/riscv/setjmp.S new file mode 100644 index 0000000000..d8f9dda5f1 --- /dev/null +++ b/sysdeps/riscv/setjmp.S @@ -0,0 +1,75 @@ +/* Copyright (C) 1996, 1997, 2000, 2002, 2003, 2004 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include + +ENTRY (_setjmp) + li a1, 0 + j __sigsetjmp +END (_setjmp) +ENTRY (setjmp) + li a1, 1 + /* Fallthrough */ +END (setjmp) +ENTRY (__sigsetjmp) + REG_S ra, 0*SZREG(a0) + REG_S s0, 1*SZREG(a0) + REG_S s1, 2*SZREG(a0) + REG_S s2, 3*SZREG(a0) + REG_S s3, 4*SZREG(a0) + REG_S s4, 5*SZREG(a0) + REG_S s5, 6*SZREG(a0) + REG_S s6, 7*SZREG(a0) + REG_S s7, 8*SZREG(a0) + REG_S s8, 9*SZREG(a0) + REG_S s9, 10*SZREG(a0) + REG_S s10,11*SZREG(a0) + REG_S s11,12*SZREG(a0) + REG_S sp, 13*SZREG(a0) + +#ifndef __riscv_float_abi_soft + FREG_S fs0, 14*SZREG+ 0*SZFREG(a0) + FREG_S fs1, 14*SZREG+ 1*SZFREG(a0) + FREG_S fs2, 14*SZREG+ 2*SZFREG(a0) + FREG_S fs3, 14*SZREG+ 3*SZFREG(a0) + FREG_S fs4, 14*SZREG+ 4*SZFREG(a0) + FREG_S fs5, 14*SZREG+ 5*SZFREG(a0) + FREG_S fs6, 14*SZREG+ 6*SZFREG(a0) + FREG_S fs7, 14*SZREG+ 7*SZFREG(a0) + FREG_S fs8, 14*SZREG+ 8*SZFREG(a0) + FREG_S fs9, 14*SZREG+ 9*SZFREG(a0) + FREG_S fs10,14*SZREG+10*SZFREG(a0) + FREG_S fs11,14*SZREG+11*SZFREG(a0) +#endif + +#if !IS_IN (libc) && IS_IN (rtld) + /* In ld.so we never save the signal mask. */ + li a0, 0 + ret +#else + /* Make a tail call to __sigjmp_save; it takes the same args. */ + j __sigjmp_save +#endif + + +END(__sigsetjmp) + +hidden_def (__sigsetjmp) +weak_alias(_setjmp, __GI__setjmp) diff --git a/sysdeps/riscv/sys/asm.h b/sysdeps/riscv/sys/asm.h new file mode 100644 index 0000000000..bd31c72bd3 --- /dev/null +++ b/sysdeps/riscv/sys/asm.h @@ -0,0 +1,79 @@ +/* copyright (c) 1997, 1998, 2002, 2003-2005, 2017 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ralf Baechle . + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _SYS_ASM_H +#define _SYS_ASM_H + +/* + * Macros to handle different pointer/register sizes for 32/64-bit code + */ +#if __riscv_xlen == 64 +# define PTRLOG 3 +# define SZREG 8 +# define REG_S sd +# define REG_L ld +#elif __riscv_xlen == 32 +# define PTRLOG 2 +# define SZREG 4 +# define REG_S sw +# define REG_L lw +#else +# error __riscv_xlen must equal 32 or 64 +#endif + +#ifndef __riscv_float_abi_soft +/* For ABI uniformity, reserve 8 bytes for floats, even if double-precision + floating-point is not supported in hardware. */ +# define SZFREG 8 +# ifdef __riscv_float_abi_single +# define FREG_L flw +# define FREG_S fsw +# elif defined(__riscv_float_abi_double) +# define FREG_L fld +# define FREG_S fsd +# else +# error unsupported FLEN +# endif +#endif + +/* + * LEAF - declare leaf routine + */ +#define LEAF(symbol) \ + .globl symbol; \ + .align 2; \ + .type symbol,@function; \ +symbol: \ + cfi_startproc; + +/* + * END - mark end of function + */ +#undef END +#define END(function) \ + cfi_endproc; \ + .size function,.-function + +/* + * Stack alignment + */ +#define ALMASK ~15 + +#endif /* sys/asm.h */