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7fa9e786b6
They are not supposed to change flow control. This fixes miscompilation with gcc 14.2.0 which then drops code, see https://lists.gnu.org/archive/html/bug-hurd/2024-11/msg00145.html
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _MACH_X86_SYSDEP_H
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#define _MACH_X86_SYSDEP_H 1
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/* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO. */
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#include <dl-sysdep.h>
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#include <tls.h>
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#define LOSE asm volatile ("hlt")
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#define STACK_GROWTH_DOWN
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/* Get the machine-independent Mach definitions. */
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#include <sysdeps/mach/sysdep.h>
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#undef ENTRY
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#undef ALIGN
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#ifndef __ASSEMBLER__
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void return_to_trampoline(intptr_t *sp, void *pc, intptr_t retval)
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__attribute__((__noreturn__));
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#endif
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#define RETURN_TO return_to_trampoline
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#ifdef __x86_64__
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#define RETURN_TO_TRAMPOLINE() \
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asm ("return_to_trampoline:\n" \
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"movq %rdx, %rax\n" \
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"movq %rdi, %rsp\n" \
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"jmp *%rsi\n");
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/* This should be rearranged, but at the moment this file provides
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the most useful definitions for assembler syntax details. */
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#include <sysdeps/unix/x86_64/sysdep.h>
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#else
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#define RETURN_TO_TRAMPOLINE() \
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asm ("return_to_trampoline:\n" \
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"movl 12(%esp), %eax\n" \
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"movl 8(%esp), %edx\n" \
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"movl 4(%esp), %esp\n" \
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"jmp *%edx\n");
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#include <sysdeps/unix/i386/sysdep.h>
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#endif
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#endif /* mach/x86/sysdep.h */
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