From patchwork Sat Nov 13 03:16:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stafford Horne X-Patchwork-Id: 47593 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 63D6C3858030 for ; Sat, 13 Nov 2021 03:23:53 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 63D6C3858030 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1636773833; bh=LsAiKLoGFTqKBpfQCkgGh1+1FLc8CpjjnpMwdz0OfEo=; h=To:Subject:Date:In-Reply-To:References:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=bHxtXaFvAtIy0uP7NXxBc312Z9b/iwenyz6TDBLD5OVupvV2QN68Svcr2V9WCsmSx Fp1clqdufGV1nrvnSyT9/kTuxpzwvNcjbl6SIFz78Q0QyQ8unp2DBaUyK5yJyeP8hR v2ZCH9vYgLbCe6az7BIN02RsEDe79zWzcJ2JvBWg= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by sourceware.org (Postfix) with ESMTPS id 275963858033 for ; 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Fri, 12 Nov 2021 19:17:09 -0800 (PST) Received: from localhost ([2409:10:24a0:4700:e8ad:216a:2a9d:6d0c]) by smtp.gmail.com with ESMTPSA id c9sm5788408pgq.58.2021.11.12.19.17.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Nov 2021 19:17:08 -0800 (PST) To: GLIBC patches Subject: [PATCH v2 09/13] or1k: Linux ABI Date: Sat, 13 Nov 2021 12:16:35 +0900 Message-Id: <20211113031639.2402161-10-shorne@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211113031639.2402161-1-shorne@gmail.com> References: <20211113031639.2402161-1-shorne@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-10.4 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Stafford Horne via Libc-alpha From: Stafford Horne Reply-To: Stafford Horne Cc: Openrisc Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" --- sysdeps/or1k/nptl/bits/pthreadtypes-arch.h | 48 ++++++++ sysdeps/or1k/nptl/pthreaddef.h | 35 ++++++ sysdeps/unix/sysv/linux/or1k/bits/procfs.h | 38 ++++++ sysdeps/unix/sysv/linux/or1k/getcontext.S | 72 +++++++++++ sysdeps/unix/sysv/linux/or1k/makecontext.c | 77 ++++++++++++ sysdeps/unix/sysv/linux/or1k/setcontext.S | 108 ++++++++++++++++ sysdeps/unix/sysv/linux/or1k/sigcontextinfo.h | 28 +++++ sysdeps/unix/sysv/linux/or1k/swapcontext.S | 116 ++++++++++++++++++ sysdeps/unix/sysv/linux/or1k/sys/ucontext.h | 53 ++++++++ sysdeps/unix/sysv/linux/or1k/sys/user.h | 1 + sysdeps/unix/sysv/linux/or1k/ucontext_i.sym | 26 ++++ 11 files changed, 602 insertions(+) create mode 100644 sysdeps/or1k/nptl/bits/pthreadtypes-arch.h create mode 100644 sysdeps/or1k/nptl/pthreaddef.h create mode 100644 sysdeps/unix/sysv/linux/or1k/bits/procfs.h create mode 100644 sysdeps/unix/sysv/linux/or1k/getcontext.S create mode 100644 sysdeps/unix/sysv/linux/or1k/makecontext.c create mode 100644 sysdeps/unix/sysv/linux/or1k/setcontext.S create mode 100644 sysdeps/unix/sysv/linux/or1k/sigcontextinfo.h create mode 100644 sysdeps/unix/sysv/linux/or1k/swapcontext.S create mode 100644 sysdeps/unix/sysv/linux/or1k/sys/ucontext.h create mode 100644 sysdeps/unix/sysv/linux/or1k/sys/user.h create mode 100644 sysdeps/unix/sysv/linux/or1k/ucontext_i.sym diff --git a/sysdeps/or1k/nptl/bits/pthreadtypes-arch.h b/sysdeps/or1k/nptl/bits/pthreadtypes-arch.h new file mode 100644 index 0000000000..56a62a7161 --- /dev/null +++ b/sysdeps/or1k/nptl/bits/pthreadtypes-arch.h @@ -0,0 +1,48 @@ +/* Machine-specific pthread type layouts. OpenRISC version. + Copyright (C) 2021 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 + . */ + +#ifndef _BITS_PTHREADTYPES_H +#define _BITS_PTHREADTYPES_H 1 + +#include + +/* Opaque union sizes for: + pthread_attr_t - internally pthread_attr + pthread_mutex_t - internally __pthread_mutex_s + pthread_mutexattr_t - internally pthread_mutexattr + pthread_cond_t - internally __pthread_cond_s + pthread_condattr_t - internally pthread_condattr + pthread_rwlock_t - internally __pthread_rwlock_arch_t + pthread_rwlockattr_t - internally pthread_rwlockattr + pthread_barrier_t - internally pthread_barrier + pthread_barrierattr_t - internally pthread_barrierattr */ + +#define __SIZEOF_PTHREAD_ATTR_T 32 +#define __SIZEOF_PTHREAD_MUTEX_T 32 +#define __SIZEOF_PTHREAD_MUTEXATTR_T 4 +#define __SIZEOF_PTHREAD_COND_T 48 +#define __SIZEOF_PTHREAD_CONDATTR_T 4 +#define __SIZEOF_PTHREAD_RWLOCK_T 44 +#define __SIZEOF_PTHREAD_RWLOCKATTR_T 8 +#define __SIZEOF_PTHREAD_BARRIER_T 20 +#define __SIZEOF_PTHREAD_BARRIERATTR_T 4 + +#define __LOCK_ALIGNMENT +#define __ONCE_ALIGNMENT + +#endif /* bits/pthreadtypes.h */ diff --git a/sysdeps/or1k/nptl/pthreaddef.h b/sysdeps/or1k/nptl/pthreaddef.h new file mode 100644 index 0000000000..eff4025a89 --- /dev/null +++ b/sysdeps/or1k/nptl/pthreaddef.h @@ -0,0 +1,35 @@ +/* Copyright (C) 2021 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 + . */ + +/* Default stack size. */ +#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024) + +/* Minimum guard size. */ +#define ARCH_MIN_GUARD_SIZE 0 + +/* Required stack pointer alignment at beginning. */ +#define STACK_ALIGN 16 + +/* Minimal stack size after allocating thread descriptor and guard size. */ +#define MINIMAL_REST_STACK 2048 + +/* Alignment requirement for TCB. Needs to be >= to STACK_ALIGN. */ +#define TCB_ALIGNMENT 16 + +/* Location of current stack frame. */ +#define CURRENT_STACK_FRAME __builtin_frame_address (0) diff --git a/sysdeps/unix/sysv/linux/or1k/bits/procfs.h b/sysdeps/unix/sysv/linux/or1k/bits/procfs.h new file mode 100644 index 0000000000..b50c92efb1 --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/bits/procfs.h @@ -0,0 +1,38 @@ +/* Types for registers for sys/procfs.h. OpenRISC version. + Copyright (C) 2021 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 + . */ + +#ifndef _SYS_PROCFS_H +# error "Never include directly; use instead." +#endif + +#include + +#define ELF_NGREG __NGREG + +/* Type for a general-purpose register. */ +typedef unsigned long int elf_greg_t; + +/* And the array of general-purpose registers. We could have used `struct + user_regs' directly, but tradition says that the register set is an array, + which does have some peculiar semantics, so leave it that way. + GDB uses this for prtrace GETREGSET, on OpenRISC the regset contains 32 + gprs the PC and the SR, 34 longs. */ +typedef elf_greg_t elf_gregset_t[34]; + +/* Register set for the floating-point registers. */ +typedef elf_greg_t elf_fpregset_t[32]; diff --git a/sysdeps/unix/sysv/linux/or1k/getcontext.S b/sysdeps/unix/sysv/linux/or1k/getcontext.S new file mode 100644 index 0000000000..3964901da3 --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/getcontext.S @@ -0,0 +1,72 @@ +/* Save current context. OpenRISC version. + Copyright (C) 2021 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 + . */ + +#include +#include "ucontext_i.h" + +/* int getcontext (ucontext_t *ucp) + + Returns 0 on success -1 and errno on failure. + */ + .text +ENTRY(__getcontext) + /* Store r1, the stack pointer. */ + l.sw (UCONTEXT_MCONTEXT + 1*4)(r3), r1 + /* Store r2, the frame pointer. */ + l.sw (UCONTEXT_MCONTEXT + 2*4)(r3), r2 + /* Store r9, the link register. */ + l.sw (UCONTEXT_MCONTEXT + 9*4)(r3), r9 + /* Store r9 to reg[11] too, as we need two links for makecontext(). */ + l.sw (UCONTEXT_MCONTEXT + 11*4)(r3), r9 + /* Store r10, the TLS register. */ + l.sw (UCONTEXT_MCONTEXT + 10*4)(r3), r10 + /* Store r14-r30 even, callee saved registers. */ + l.sw (UCONTEXT_MCONTEXT + 14*4)(r3), r14 + l.sw (UCONTEXT_MCONTEXT + 16*4)(r3), r16 + l.sw (UCONTEXT_MCONTEXT + 18*4)(r3), r18 + l.sw (UCONTEXT_MCONTEXT + 20*4)(r3), r20 + l.sw (UCONTEXT_MCONTEXT + 22*4)(r3), r22 + l.sw (UCONTEXT_MCONTEXT + 24*4)(r3), r24 + l.sw (UCONTEXT_MCONTEXT + 26*4)(r3), r26 + l.sw (UCONTEXT_MCONTEXT + 28*4)(r3), r28 + l.sw (UCONTEXT_MCONTEXT + 30*4)(r3), r30 + + /* Get signal mask. */ + /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ + l.ori r6, r0, _NSIG8 + l.addi r5, r3, UCONTEXT_SIGMASK + l.ori r4, r0, 0 + l.ori r3, r0, SIG_BLOCK + l.ori r11, r0, SYS_ify (rt_sigprocmask) + /* Do the syscall. */ + l.sys 1 + l.nop + + /* if -4096 < ret < 0 holds, it's an error */ + l.sfgeui r11, 0xf001 + l.bf 1f + l.nop + + l.jr r9 + l.ori r11, r0, 0 + +1: l.j __syscall_error + l.ori r3, r11, 0 + +END(__getcontext) +weak_alias(__getcontext, getcontext) diff --git a/sysdeps/unix/sysv/linux/or1k/makecontext.c b/sysdeps/unix/sysv/linux/or1k/makecontext.c new file mode 100644 index 0000000000..928c63bada --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/makecontext.c @@ -0,0 +1,77 @@ +/* Create new context. OpenRISC version. + Copyright (C) 2021 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 + . */ + +#include +#include +#include +#include + +/* makecontext sets up a stack and the registers for the + user context. The stack looks like this: + + +-----------------------+ + | padding as required | + +-----------------------+ + sp -> | parameters 7 to n | + +-----------------------+ + + The registers are set up like this: + r3-r8 : parameters 1 to 6 + r14 : uc_link + r1 : stack pointer + r2 : frame pointer, set to NULL +*/ +void +__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) +{ + extern void __startcontext (void); + unsigned long int *sp; + va_list ap; + int i; + + sp = (unsigned long int *) + ((uintptr_t) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size); + + /* Allocate stack arguments. */ + sp -= argc < 6 ? 0 : argc - 6; + + /* Keep the stack aligned. */ + sp = (unsigned long int *) (((uintptr_t) sp) & -4L); + + /* Keep uc_link in r14. */ + ucp->uc_mcontext.__gprs[14] = (uintptr_t) ucp->uc_link; + /* Return address points to __startcontext(). */ + ucp->uc_mcontext.__gprs[9] = (uintptr_t) &__startcontext; + /* Frame pointer is null. */ + ucp->uc_mcontext.__gprs[2] = (uintptr_t) 0; + /* Restart in user-space starting at 'func'. */ + ucp->uc_mcontext.__gprs[11] = (uintptr_t) func; + /* Set stack pointer. */ + ucp->uc_mcontext.__gprs[1] = (uintptr_t) sp; + + va_start (ap, argc); + for (i = 0; i < argc; ++i) + if (i < 6) + ucp->uc_mcontext.__gprs[i + 3] = va_arg (ap, unsigned long int); + else + sp[i - 6] = va_arg (ap, unsigned long int); + + va_end (ap); +} + +weak_alias (__makecontext, makecontext) diff --git a/sysdeps/unix/sysv/linux/or1k/setcontext.S b/sysdeps/unix/sysv/linux/or1k/setcontext.S new file mode 100644 index 0000000000..d55a16b2dd --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/setcontext.S @@ -0,0 +1,108 @@ +/* Set current context. OpenRISC version. + Copyright (C) 2021 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 + . */ + +#include +#include "ucontext_i.h" + +/* int setcontext (const ucontext_t *ucp) */ + .text +ENTRY(__setcontext) + l.ori r30, r3, 0 + + /* Restore signal mask. */ + /* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */ + l.ori r6, r0, _NSIG8 + l.ori r5, r0, 0 + l.addi r4, r3, UCONTEXT_SIGMASK + l.ori r3, r0, SIG_SETMASK + l.ori r11, r0, SYS_ify (rt_sigprocmask) + /* Do the syscall. */ + l.sys 1 + l.nop + + /* if -4096 < ret < 0 holds, it's an error */ + l.sfgeui r11, 0xf001 + l.bf 1f + l.nop + + /* Restore argument registers, for the makecontext() case. */ + l.lwz r3, (UCONTEXT_MCONTEXT + 3*4)(r30) + l.lwz r4, (UCONTEXT_MCONTEXT + 4*4)(r30) + l.lwz r5, (UCONTEXT_MCONTEXT + 5*4)(r30) + l.lwz r6, (UCONTEXT_MCONTEXT + 6*4)(r30) + l.lwz r7, (UCONTEXT_MCONTEXT + 7*4)(r30) + l.lwz r8, (UCONTEXT_MCONTEXT + 8*4)(r30) + + /* Restore registers stored in getcontext(). */ + l.lwz r1, (UCONTEXT_MCONTEXT + 1*4)(r30) + l.lwz r2, (UCONTEXT_MCONTEXT + 2*4)(r30) + l.lwz r9, (UCONTEXT_MCONTEXT + 9*4)(r30) + l.lwz r10, (UCONTEXT_MCONTEXT + 10*4)(r30) + l.lwz r11, (UCONTEXT_MCONTEXT + 11*4)(r30) + /* Restore r14-r30 even, callee saved registers. */ + l.lwz r14, (UCONTEXT_MCONTEXT + 14*4)(r30) + l.lwz r16, (UCONTEXT_MCONTEXT + 16*4)(r30) + l.lwz r18, (UCONTEXT_MCONTEXT + 18*4)(r30) + l.lwz r20, (UCONTEXT_MCONTEXT + 20*4)(r30) + l.lwz r22, (UCONTEXT_MCONTEXT + 22*4)(r30) + l.lwz r24, (UCONTEXT_MCONTEXT + 24*4)(r30) + l.lwz r26, (UCONTEXT_MCONTEXT + 26*4)(r30) + l.lwz r28, (UCONTEXT_MCONTEXT + 28*4)(r30) + l.lwz r30, (UCONTEXT_MCONTEXT + 30*4)(r30) + + l.jr r11 + l.ori r11, r0, 0 + +1: l.j __syscall_error + l.ori r3, r11, 0 + +END (__setcontext) +weak_alias (__setcontext, setcontext) + + /* We add a NOP here because when the unwinder is looking for the + enclosing function of the link register (r9) address FDE lookup will + use '$r9 - 1' finding setcontext which is wrong. This is because in + makecontext we have set r9 to the start of &__startcontext. + + If this NOP did not exist the unwinder would repeatedly find + __setcontext's FDE in an infinite loop. Modifiying/deleting the below + __startcontext's FDE has no help on this. */ + l.nop + +ENTRY(__startcontext) + + l.ori r3, r14, 0 + l.sfeq r3, r0 + /* If uc_link is not 0 resume there, otherwise exit. */ + l.bnf __setcontext + l.nop + +#ifdef SHARED + /* Obtain a pointer to .got in r16 */ + l.jal 0x8 + l.movhi r16, gotpchi(_GLOBAL_OFFSET_TABLE_-4) + l.ori r16, r16, gotpclo(_GLOBAL_OFFSET_TABLE_+0) + l.add r16, r16, r9 + l.lwz r16, got(exit)(r16) + l.jr r16 +#else + l.j exit +#endif + l.nop + +END(__startcontext) diff --git a/sysdeps/unix/sysv/linux/or1k/sigcontextinfo.h b/sysdeps/unix/sysv/linux/or1k/sigcontextinfo.h new file mode 100644 index 0000000000..3cafa6ff49 --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/sigcontextinfo.h @@ -0,0 +1,28 @@ +/* Profile counter helper to get PC from sigcontext. OpenRISC version. + Copyright (C) 2021 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 + . */ + +#ifndef _SIGCONTEXTINFO_H +#define _SIGCONTEXTINFO_H + +static inline uintptr_t +sigcontext_get_pc (const ucontext_t *ctx) +{ + return ctx->uc_mcontext.__pc; +} + +#endif diff --git a/sysdeps/unix/sysv/linux/or1k/swapcontext.S b/sysdeps/unix/sysv/linux/or1k/swapcontext.S new file mode 100644 index 0000000000..9624eb986c --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/swapcontext.S @@ -0,0 +1,116 @@ +/* Swap two contexts. OpenRISC version. + Copyright (C) 2021 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 + . */ + +#include +#include "ucontext_i.h" + +/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */ + .text +ENTRY(__swapcontext) + + /* Same as getcontext(). */ + /* Store r1, the stack pointer. */ + l.sw (UCONTEXT_MCONTEXT + 1*4)(r3), r1 + /* Store r2, the frame pointer. */ + l.sw (UCONTEXT_MCONTEXT + 2*4)(r3), r2 + /* Store r9, the link register. */ + l.sw (UCONTEXT_MCONTEXT + 9*4)(r3), r9 + /* Store r9 to reg[11] too, as we need two links for makecontext(). */ + l.sw (UCONTEXT_MCONTEXT + 11*4)(r3), r9 + /* Store r10, the TLS register. */ + l.sw (UCONTEXT_MCONTEXT + 10*4)(r3), r10 + /* Store r14-r30 even, callee saved registers. */ + l.sw (UCONTEXT_MCONTEXT + 14*4)(r3), r14 + l.sw (UCONTEXT_MCONTEXT + 16*4)(r3), r16 + l.sw (UCONTEXT_MCONTEXT + 18*4)(r3), r18 + l.sw (UCONTEXT_MCONTEXT + 20*4)(r3), r20 + l.sw (UCONTEXT_MCONTEXT + 22*4)(r3), r22 + l.sw (UCONTEXT_MCONTEXT + 24*4)(r3), r24 + l.sw (UCONTEXT_MCONTEXT + 26*4)(r3), r26 + l.sw (UCONTEXT_MCONTEXT + 28*4)(r3), r28 + l.sw (UCONTEXT_MCONTEXT + 30*4)(r3), r30 + + /* Store ucp to non-argument syscall preserved register. */ + l.ori r30, r4, 0 + + /* Get signal mask. */ + /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ + l.ori r6, r0, _NSIG8 + l.addi r5, r3, UCONTEXT_SIGMASK + l.ori r4, r0, 0 + l.ori r3, r0, SIG_BLOCK + l.ori r11, r0, SYS_ify (rt_sigprocmask) + /* Do the syscall. */ + l.sys 1 + l.nop + + /* if -4096 < ret < 0 holds, it's an error */ + l.sfgeui r11, 0xf001 + l.bf 1f + l.nop + + /* Same as setcontext(). */ + + /* Restore signal mask. */ + /* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */ + l.ori r6, r0, _NSIG8 + l.ori r5, r0, 0 + l.addi r4, r30, UCONTEXT_SIGMASK + l.ori r3, r0, SIG_SETMASK + l.ori r11, r0, SYS_ify (rt_sigprocmask) + /* Do the syscall. */ + l.sys 1 + l.nop + + /* if -4096 < ret < 0 holds, it's an error */ + l.sfgeui r11, 0xf001 + l.bf 1f + l.nop + + /* Restore argument registers, for the makecontext() case. */ + l.lwz r3, (UCONTEXT_MCONTEXT + 3*4)(r30) + l.lwz r4, (UCONTEXT_MCONTEXT + 4*4)(r30) + l.lwz r5, (UCONTEXT_MCONTEXT + 5*4)(r30) + l.lwz r6, (UCONTEXT_MCONTEXT + 6*4)(r30) + l.lwz r7, (UCONTEXT_MCONTEXT + 7*4)(r30) + l.lwz r8, (UCONTEXT_MCONTEXT + 8*4)(r30) + + /* Restore registers stored in getcontext(). */ + l.lwz r1, (UCONTEXT_MCONTEXT + 1*4)(r30) + l.lwz r2, (UCONTEXT_MCONTEXT + 2*4)(r30) + l.lwz r9, (UCONTEXT_MCONTEXT + 9*4)(r30) + l.lwz r10, (UCONTEXT_MCONTEXT + 10*4)(r30) + l.lwz r11, (UCONTEXT_MCONTEXT + 11*4)(r30) + l.lwz r14, (UCONTEXT_MCONTEXT + 14*4)(r30) + l.lwz r16, (UCONTEXT_MCONTEXT + 16*4)(r30) + l.lwz r18, (UCONTEXT_MCONTEXT + 18*4)(r30) + l.lwz r20, (UCONTEXT_MCONTEXT + 20*4)(r30) + l.lwz r22, (UCONTEXT_MCONTEXT + 22*4)(r30) + l.lwz r24, (UCONTEXT_MCONTEXT + 24*4)(r30) + l.lwz r26, (UCONTEXT_MCONTEXT + 26*4)(r30) + l.lwz r28, (UCONTEXT_MCONTEXT + 28*4)(r30) + l.lwz r30, (UCONTEXT_MCONTEXT + 30*4)(r30) + + l.jr r11 + l.ori r11, r0, 0 + +1: l.j __syscall_error + l.ori r3, r11, 0 + +END (__swapcontext) +weak_alias (__swapcontext, swapcontext) diff --git a/sysdeps/unix/sysv/linux/or1k/sys/ucontext.h b/sysdeps/unix/sysv/linux/or1k/sys/ucontext.h new file mode 100644 index 0000000000..274309fef9 --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/sys/ucontext.h @@ -0,0 +1,53 @@ +/* ucontext_t definition, OpenRISC version. + Copyright (C) 2021 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 + . */ + +/* System V/OpenRISC compliant context switching support. */ + +#ifndef _SYS_UCONTEXT_H +#define _SYS_UCONTEXT_H 1 + +#include + +#include +#include + +/* Number of general registers. */ +#define __NGREG 32 +#ifdef __USE_MISC +# define NGREG __NGREG +#endif + +/* Context to describe whole processor state. */ +typedef struct + { + unsigned long int __gprs[__NGREG]; + unsigned long int __pc; + unsigned long int __sr; + } mcontext_t; + +/* Userlevel context. */ +typedef struct ucontext_t + { + unsigned long int __uc_flags;/* getcontext() 1, ... */ + struct ucontext_t *uc_link; /* user setup before makecontext () */ + stack_t uc_stack; /* user setup before make context() */ + mcontext_t uc_mcontext; /* getcontext() regs, v2 : makecontext() func, sp, RA=__startcontext, args injected */ + sigset_t uc_sigmask; /* getcontext() sigprocmask : */ + } ucontext_t; + +#endif /* sys/ucontext.h */ diff --git a/sysdeps/unix/sysv/linux/or1k/sys/user.h b/sysdeps/unix/sysv/linux/or1k/sys/user.h new file mode 100644 index 0000000000..c871f1a03d --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/sys/user.h @@ -0,0 +1 @@ +/* This file is not needed, but in practice gdb might try to include it. */ diff --git a/sysdeps/unix/sysv/linux/or1k/ucontext_i.sym b/sysdeps/unix/sysv/linux/or1k/ucontext_i.sym new file mode 100644 index 0000000000..a8d4db080f --- /dev/null +++ b/sysdeps/unix/sysv/linux/or1k/ucontext_i.sym @@ -0,0 +1,26 @@ +#include +#include +#include +#include + +-- Constants used by the rt_sigprocmask call. + +SIG_BLOCK +SIG_SETMASK + +_NSIG8 (_NSIG / 8) + +-- Offsets of the fields in the ucontext_t structure. +#define ucontext(member) offsetof (ucontext_t, member) +#define stack(member) ucontext (uc_stack.member) + +UCONTEXT_LINK ucontext (uc_link) +UCONTEXT_STACK ucontext (uc_stack) +UCONTEXT_MCONTEXT ucontext (uc_mcontext) +UCONTEXT_SIGMASK ucontext (uc_sigmask) + +STACK_SP stack (ss_sp) +STACK_SIZE stack (ss_size) +STACK_FLAGS stack (ss_flags) + +UCONTEXT_SIZE sizeof (ucontext_t)