mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 08:11:08 +00:00
133 lines
5.5 KiB
C
133 lines
5.5 KiB
C
/* THREAD_* accessors. x86_64 version.
|
|
Copyright (C) 2002-2023 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* Read member of the thread descriptor directly. */
|
|
# define THREAD_GETMEM(descr, member) \
|
|
({ __typeof (descr->member) __value; \
|
|
_Static_assert (sizeof (__value) == 1 \
|
|
|| sizeof (__value) == 4 \
|
|
|| sizeof (__value) == 8, \
|
|
"size of per-thread data"); \
|
|
if (sizeof (__value) == 1) \
|
|
asm volatile ("movb %%fs:%P2,%b0" \
|
|
: "=q" (__value) \
|
|
: "0" (0), "i" (offsetof (struct pthread, member))); \
|
|
else if (sizeof (__value) == 4) \
|
|
asm volatile ("movl %%fs:%P1,%0" \
|
|
: "=r" (__value) \
|
|
: "i" (offsetof (struct pthread, member))); \
|
|
else /* 8 */ \
|
|
{ \
|
|
asm volatile ("movq %%fs:%P1,%q0" \
|
|
: "=r" (__value) \
|
|
: "i" (offsetof (struct pthread, member))); \
|
|
} \
|
|
__value; })
|
|
|
|
/* THREAD_GETMEM already forces a read. */
|
|
#define THREAD_GETMEM_VOLATILE(descr, member) THREAD_GETMEM (descr, member)
|
|
|
|
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
|
|
# define THREAD_GETMEM_NC(descr, member, idx) \
|
|
({ __typeof (descr->member[0]) __value; \
|
|
_Static_assert (sizeof (__value) == 1 \
|
|
|| sizeof (__value) == 4 \
|
|
|| sizeof (__value) == 8, \
|
|
"size of per-thread data"); \
|
|
if (sizeof (__value) == 1) \
|
|
asm volatile ("movb %%fs:%P2(%q3),%b0" \
|
|
: "=q" (__value) \
|
|
: "0" (0), "i" (offsetof (struct pthread, member[0])), \
|
|
"r" (idx)); \
|
|
else if (sizeof (__value) == 4) \
|
|
asm volatile ("movl %%fs:%P1(,%q2,4),%0" \
|
|
: "=r" (__value) \
|
|
: "i" (offsetof (struct pthread, member[0])), "r" (idx));\
|
|
else /* 8 */ \
|
|
{ \
|
|
asm volatile ("movq %%fs:%P1(,%q2,8),%q0" \
|
|
: "=r" (__value) \
|
|
: "i" (offsetof (struct pthread, member[0])), \
|
|
"r" (idx)); \
|
|
} \
|
|
__value; })
|
|
|
|
|
|
/* Loading addresses of objects on x86-64 needs to be treated special
|
|
when generating PIC code. */
|
|
#ifdef __pic__
|
|
# define IMM_MODE "nr"
|
|
#else
|
|
# define IMM_MODE "ir"
|
|
#endif
|
|
|
|
|
|
/* Set member of the thread descriptor directly. */
|
|
# define THREAD_SETMEM(descr, member, value) \
|
|
({ \
|
|
_Static_assert (sizeof (descr->member) == 1 \
|
|
|| sizeof (descr->member) == 4 \
|
|
|| sizeof (descr->member) == 8, \
|
|
"size of per-thread data"); \
|
|
if (sizeof (descr->member) == 1) \
|
|
asm volatile ("movb %b0,%%fs:%P1" : \
|
|
: "iq" (value), \
|
|
"i" (offsetof (struct pthread, member))); \
|
|
else if (sizeof (descr->member) == 4) \
|
|
asm volatile ("movl %0,%%fs:%P1" : \
|
|
: IMM_MODE (value), \
|
|
"i" (offsetof (struct pthread, member))); \
|
|
else /* 8 */ \
|
|
{ \
|
|
/* Since movq takes a signed 32-bit immediate or a register source \
|
|
operand, use "er" constraint for 32-bit signed integer constant \
|
|
or register. */ \
|
|
asm volatile ("movq %q0,%%fs:%P1" : \
|
|
: "er" ((uint64_t) cast_to_integer (value)), \
|
|
"i" (offsetof (struct pthread, member))); \
|
|
}})
|
|
|
|
|
|
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
|
|
# define THREAD_SETMEM_NC(descr, member, idx, value) \
|
|
({ \
|
|
_Static_assert (sizeof (descr->member[0]) == 1 \
|
|
|| sizeof (descr->member[0]) == 4 \
|
|
|| sizeof (descr->member[0]) == 8, \
|
|
"size of per-thread data"); \
|
|
if (sizeof (descr->member[0]) == 1) \
|
|
asm volatile ("movb %b0,%%fs:%P1(%q2)" : \
|
|
: "iq" (value), \
|
|
"i" (offsetof (struct pthread, member[0])), \
|
|
"r" (idx)); \
|
|
else if (sizeof (descr->member[0]) == 4) \
|
|
asm volatile ("movl %0,%%fs:%P1(,%q2,4)" : \
|
|
: IMM_MODE (value), \
|
|
"i" (offsetof (struct pthread, member[0])), \
|
|
"r" (idx)); \
|
|
else /* 8 */ \
|
|
{ \
|
|
/* Since movq takes a signed 32-bit immediate or a register source \
|
|
operand, use "er" constraint for 32-bit signed integer constant \
|
|
or register. */ \
|
|
asm volatile ("movq %q0,%%fs:%P1(,%q2,8)" : \
|
|
: "er" ((uint64_t) cast_to_integer (value)), \
|
|
"i" (offsetof (struct pthread, member[0])), \
|
|
"r" (idx)); \
|
|
}})
|