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75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/* Mach thread state definitions for machine-independent code. i386 version.
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Copyright (C) 1994-2024 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_THREAD_STATE_H
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#define _MACH_X86_THREAD_STATE_H 1
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#include <mach/machine/thread_status.h>
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#include <libc-pointer-arith.h>
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/* This lets the kernel define segments for a new thread. */
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#define MACHINE_NEW_THREAD_STATE_FLAVOR i386_THREAD_STATE
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/* This makes the kernel load our segments descriptors. */
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#define MACHINE_THREAD_STATE_FLAVOR i386_REGS_SEGS_STATE
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#define MACHINE_THREAD_STATE_COUNT i386_THREAD_STATE_COUNT
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#define machine_thread_state i386_thread_state
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#ifdef __x86_64__
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#define PC rip
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#define SP ursp
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#define SYSRETURN rax
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#define MACHINE_THREAD_STATE_FIX_NEW(ts) do { \
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asm ("mov %%cs, %w0" : "=q" ((ts)->cs)); \
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} while(0)
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#else
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#define PC eip
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#define SP uesp
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#define SYSRETURN eax
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#define MACHINE_THREAD_STATE_FIX_NEW(ts) do { \
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asm ("mov %%cs, %w0" : "=q" ((ts)->cs)); \
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asm ("mov %%ds, %w0" : "=q" ((ts)->ds)); \
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asm ("mov %%es, %w0" : "=q" ((ts)->es)); \
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asm ("mov %%fs, %w0" : "=q" ((ts)->fs)); \
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asm ("mov %%gs, %w0" : "=q" ((ts)->gs)); \
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} while(0)
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#endif
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struct machine_thread_all_state
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{
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int set; /* Mask of bits (1 << FLAVOR). */
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struct i386_thread_state basic;
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struct i386_float_state fpu;
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};
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#ifdef __x86_64__
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/* We're setting up the stack to perform a function call. On function entry,
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the stack pointer must be 8 bytes less than 16-aligned. */
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#define PTR_ALIGN_DOWN_8_16(ptr) \
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({ uintptr_t __ptr = PTR_ALIGN_DOWN (ptr, 8); \
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PTR_IS_ALIGNED (__ptr, 16) ? (__ptr - 8) : __ptr; })
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#define MACHINE_THREAD_STATE_SETUP_CALL(ts, stack, size, func) \
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((ts)->SP = PTR_ALIGN_DOWN_8_16 ((uintptr_t) (stack) + (size)), \
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(ts)->PC = (uintptr_t) func)
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#endif
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#include <sysdeps/mach/thread_state.h>
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#endif /* mach/x86/thread_state.h */
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