1995-02-18 01:27:10 +00:00
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/* Mach thread state definitions for machine-independent code. i386 version.
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2023-01-06 21:08:04 +00:00
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Copyright (C) 1994-2023 Free Software Foundation, Inc.
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1997-06-23 21:55:26 +00:00
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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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2001-07-06 04:58:11 +00:00
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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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1997-06-23 21:55:26 +00:00
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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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2001-07-06 04:58:11 +00:00
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Lesser General Public License for more details.
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1997-06-23 21:55:26 +00:00
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2001-07-06 04:58:11 +00:00
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You should have received a copy of the GNU Lesser General Public
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2012-02-09 23:18:22 +00:00
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License along with the GNU C Library; if not, see
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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
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<https://www.gnu.org/licenses/>. */
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1995-02-18 01:27:10 +00:00
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2023-02-15 06:16:38 +00:00
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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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2011-02-16 23:16:33 +00:00
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1995-02-18 01:27:10 +00:00
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#include <mach/machine/thread_status.h>
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mach: Define MACHINE_THREAD_STATE_SETUP_CALL
The existing two macros, MACHINE_THREAD_STATE_SET_PC and
MACHINE_THREAD_STATE_SET_SP, can be used to set program counter and the
stack pointer registers in a machine-specific thread state structure.
Useful as it is, this may not be enough to set up the thread to make a
function call, because the machine-specific ABI may impose additional
requirements. In particular, x86_64 ABI requires that upon function
entry, the stack pointer is 8 less than 16-byte aligned (sp & 15 == 8).
To deal with this, introduce a new macro,
MACHINE_THREAD_STATE_SETUP_CALL (), which sets both stack and
instruction pointers, and also applies any machine-specific requirements
to make a valid function call. The default implementation simply
forwards to MACHINE_THREAD_STATE_SET_PC and MACHINE_THREAD_STATE_SET_SP,
but on x86_64 we additionally align the stack pointer.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230517191436.73636-3-bugaevc@gmail.com>
2023-05-17 19:14:28 +00:00
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#include <libc-pointer-arith.h>
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1995-02-18 01:27:10 +00:00
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2018-03-17 02:17:36 +00:00
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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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1995-02-18 01:27:10 +00:00
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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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2023-02-15 06:16:38 +00:00
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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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2023-09-27 22:07:18 +00:00
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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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2023-02-15 06:16:38 +00:00
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#else
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1995-02-18 01:27:10 +00:00
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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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2018-03-17 02:17:36 +00:00
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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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2023-09-27 22:07:18 +00:00
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#endif
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2018-03-17 02:17:36 +00:00
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1995-02-18 01:27:10 +00:00
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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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mach: Define MACHINE_THREAD_STATE_SETUP_CALL
The existing two macros, MACHINE_THREAD_STATE_SET_PC and
MACHINE_THREAD_STATE_SET_SP, can be used to set program counter and the
stack pointer registers in a machine-specific thread state structure.
Useful as it is, this may not be enough to set up the thread to make a
function call, because the machine-specific ABI may impose additional
requirements. In particular, x86_64 ABI requires that upon function
entry, the stack pointer is 8 less than 16-byte aligned (sp & 15 == 8).
To deal with this, introduce a new macro,
MACHINE_THREAD_STATE_SETUP_CALL (), which sets both stack and
instruction pointers, and also applies any machine-specific requirements
to make a valid function call. The default implementation simply
forwards to MACHINE_THREAD_STATE_SET_PC and MACHINE_THREAD_STATE_SET_SP,
but on x86_64 we additionally align the stack pointer.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230517191436.73636-3-bugaevc@gmail.com>
2023-05-17 19:14:28 +00:00
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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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1998-09-23 18:52:55 +00:00
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#include <sysdeps/mach/thread_state.h>
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2011-02-16 23:16:33 +00:00
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2023-02-15 06:16:38 +00:00
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#endif /* mach/x86/thread_state.h */
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