mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 21:40:12 +00:00
148 lines
5.1 KiB
C
148 lines
5.1 KiB
C
/* Cancellable system call stubs. Linux/PowerPC64 version.
|
|
Copyright (C) 2003-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.
|
|
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <tls.h>
|
|
#ifndef __ASSEMBLER__
|
|
# include <nptl/pthreadP.h>
|
|
#endif
|
|
|
|
#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
|
|
|
|
# define DASHDASHPFX(str) __##str
|
|
|
|
#if _CALL_ELF == 2
|
|
#define CANCEL_FRAMESIZE (FRAME_MIN_SIZE+16+48)
|
|
#define CANCEL_PARM_SAVE (FRAME_MIN_SIZE+16)
|
|
#else
|
|
#define CANCEL_FRAMESIZE (FRAME_MIN_SIZE+16)
|
|
#define CANCEL_PARM_SAVE (CANCEL_FRAMESIZE+FRAME_PARM_SAVE)
|
|
#endif
|
|
|
|
# undef PSEUDO
|
|
# define PSEUDO(name, syscall_name, args) \
|
|
.section ".text"; \
|
|
ENTRY (name) \
|
|
SINGLE_THREAD_P; \
|
|
bne- .Lpseudo_cancel; \
|
|
.type DASHDASHPFX(syscall_name##_nocancel),@function; \
|
|
.globl DASHDASHPFX(syscall_name##_nocancel); \
|
|
DASHDASHPFX(syscall_name##_nocancel): \
|
|
DO_CALL (SYS_ify (syscall_name)); \
|
|
PSEUDO_RET; \
|
|
.size DASHDASHPFX(syscall_name##_nocancel),.-DASHDASHPFX(syscall_name##_nocancel); \
|
|
.Lpseudo_cancel: \
|
|
stdu 1,-CANCEL_FRAMESIZE(1); \
|
|
cfi_adjust_cfa_offset (CANCEL_FRAMESIZE); \
|
|
mflr 9; \
|
|
std 9,CANCEL_FRAMESIZE+FRAME_LR_SAVE(1); \
|
|
cfi_offset (lr, FRAME_LR_SAVE); \
|
|
DOCARGS_##args; /* save syscall args around CENABLE. */ \
|
|
CENABLE; \
|
|
std 3,FRAME_MIN_SIZE(1); /* store CENABLE return value (MASK). */ \
|
|
UNDOCARGS_##args; /* restore syscall args. */ \
|
|
DO_CALL (SYS_ify (syscall_name)); \
|
|
mfcr 0; /* save CR/R3 around CDISABLE. */ \
|
|
std 3,FRAME_MIN_SIZE+8(1); \
|
|
std 0,CANCEL_FRAMESIZE+FRAME_CR_SAVE(1); \
|
|
cfi_offset (cr, FRAME_CR_SAVE); \
|
|
ld 3,FRAME_MIN_SIZE(1); /* pass MASK to CDISABLE. */ \
|
|
CDISABLE; \
|
|
ld 9,CANCEL_FRAMESIZE+FRAME_LR_SAVE(1); \
|
|
ld 0,CANCEL_FRAMESIZE+FRAME_CR_SAVE(1); /* restore CR/R3. */ \
|
|
ld 3,FRAME_MIN_SIZE+8(1); \
|
|
mtlr 9; \
|
|
mtcr 0; \
|
|
addi 1,1,CANCEL_FRAMESIZE; \
|
|
cfi_adjust_cfa_offset (-CANCEL_FRAMESIZE); \
|
|
cfi_restore (lr); \
|
|
cfi_restore (cr)
|
|
|
|
# define DOCARGS_0
|
|
# define UNDOCARGS_0
|
|
|
|
# define DOCARGS_1 std 3,CANCEL_PARM_SAVE(1); DOCARGS_0
|
|
# define UNDOCARGS_1 ld 3,CANCEL_PARM_SAVE(1); UNDOCARGS_0
|
|
|
|
# define DOCARGS_2 std 4,CANCEL_PARM_SAVE+8(1); DOCARGS_1
|
|
# define UNDOCARGS_2 ld 4,CANCEL_PARM_SAVE+8(1); UNDOCARGS_1
|
|
|
|
# define DOCARGS_3 std 5,CANCEL_PARM_SAVE+16(1); DOCARGS_2
|
|
# define UNDOCARGS_3 ld 5,CANCEL_PARM_SAVE+16(1); UNDOCARGS_2
|
|
|
|
# define DOCARGS_4 std 6,CANCEL_PARM_SAVE+24(1); DOCARGS_3
|
|
# define UNDOCARGS_4 ld 6,CANCEL_PARM_SAVE+24(1); UNDOCARGS_3
|
|
|
|
# define DOCARGS_5 std 7,CANCEL_PARM_SAVE+32(1); DOCARGS_4
|
|
# define UNDOCARGS_5 ld 7,CANCEL_PARM_SAVE+32(1); UNDOCARGS_4
|
|
|
|
# define DOCARGS_6 std 8,CANCEL_PARM_SAVE+40(1); DOCARGS_5
|
|
# define UNDOCARGS_6 ld 8,CANCEL_PARM_SAVE+40(1); UNDOCARGS_5
|
|
|
|
# if IS_IN (libpthread)
|
|
# ifdef SHARED
|
|
# define CENABLE bl JUMPTARGET(__pthread_enable_asynccancel)
|
|
# define CDISABLE bl JUMPTARGET(__pthread_disable_asynccancel)
|
|
# else
|
|
# define CENABLE bl JUMPTARGET(__pthread_enable_asynccancel); nop
|
|
# define CDISABLE bl JUMPTARGET(__pthread_disable_asynccancel); nop
|
|
# endif
|
|
# elif IS_IN (libc)
|
|
# ifdef SHARED
|
|
# define CENABLE bl JUMPTARGET(__libc_enable_asynccancel)
|
|
# define CDISABLE bl JUMPTARGET(__libc_disable_asynccancel)
|
|
# else
|
|
# define CENABLE bl JUMPTARGET(__libc_enable_asynccancel); nop
|
|
# define CDISABLE bl JUMPTARGET(__libc_disable_asynccancel); nop
|
|
# endif
|
|
# elif IS_IN (librt)
|
|
# ifdef SHARED
|
|
# define CENABLE bl JUMPTARGET(__librt_enable_asynccancel)
|
|
# define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel)
|
|
# else
|
|
# define CENABLE bl JUMPTARGET(__librt_enable_asynccancel); nop
|
|
# define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel); nop
|
|
# endif
|
|
# else
|
|
# error Unsupported library
|
|
# endif
|
|
|
|
# ifndef __ASSEMBLER__
|
|
# define SINGLE_THREAD_P \
|
|
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
|
|
header.multiple_threads) == 0, 1)
|
|
# else
|
|
# define SINGLE_THREAD_P \
|
|
lwz 10,MULTIPLE_THREADS_OFFSET(13); \
|
|
cmpwi 10,0
|
|
# endif
|
|
|
|
#elif !defined __ASSEMBLER__
|
|
|
|
# define SINGLE_THREAD_P (1)
|
|
# define NO_CANCELLATION 1
|
|
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLER__
|
|
# define RTLD_SINGLE_THREAD_P \
|
|
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
|
|
header.multiple_threads) == 0, 1)
|
|
#endif
|