mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 22:00:08 +00:00
9db87dc9e2
* sysdeps/unix/sysv/linux/arm/sysdep-cancel.h: Update RETINSTR use. * sysdeps/unix/sysv/linux/arm/vfork.S: Likewise.
146 lines
4.7 KiB
C
146 lines
4.7 KiB
C
/* Copyright (C) 2003 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Phil Blundell <pb@nexus.co.uk>, 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <sysdep.h>
|
|
#ifndef __ASSEMBLER__
|
|
# include <linuxthreads/internals.h>
|
|
#endif
|
|
|
|
#if !defined NOT_IN_libc || defined IS_IN_libpthread
|
|
|
|
/* We push lr onto the stack, so we have to use ldmib instead of ldmia
|
|
to find the saved arguments. */
|
|
# ifdef PIC
|
|
# undef DOARGS_5
|
|
# undef DOARGS_6
|
|
# undef DOARGS_7
|
|
# define DOARGS_5 str r4, [sp, $-4]!; ldr r4, [sp, $8];
|
|
# define DOARGS_6 mov ip, sp; stmfd sp!, {r4, r5}; ldmib ip, {r4, r5};
|
|
# define DOARGS_7 mov ip, sp; stmfd sp!, {r4, r5, r6}; ldmib ip, {r4, r5, r6};
|
|
# endif
|
|
|
|
# undef PSEUDO_RET
|
|
# define PSEUDO_RET \
|
|
ldrcc pc, [sp], $4; \
|
|
ldr lr, [sp], $4; \
|
|
b PLTJMP(SYSCALL_ERROR)
|
|
|
|
# undef PSEUDO
|
|
# define PSEUDO(name, syscall_name, args) \
|
|
.section ".text"; \
|
|
PSEUDO_PROLOGUE; \
|
|
ENTRY (name); \
|
|
SINGLE_THREAD_P_INT; \
|
|
bne .Lpseudo_cancel; \
|
|
DO_CALL (syscall_name, args); \
|
|
cmn r0, $4096; \
|
|
PSEUDO_RET_MOV; \
|
|
.Lpseudo_cancel: \
|
|
MAYBE_SAVE_LR; \
|
|
DOCARGS_##args; /* save syscall args around CENABLE. */ \
|
|
CENABLE; \
|
|
mov ip, r0; /* put mask in safe place. */ \
|
|
UNDOCARGS_##args; /* restore syscall args. */ \
|
|
swi SYS_ify (syscall_name); /* do the call. */ \
|
|
str r0, [sp, $-4]!; /* save syscall return value. */ \
|
|
mov r0, ip; /* get mask back. */ \
|
|
CDISABLE; \
|
|
ldr r0, [sp], $4; /* retrieve return value. */ \
|
|
UNDOC2ARGS_##args; /* fix register damage. */ \
|
|
cmn r0, $4096;
|
|
|
|
# define DOCARGS_0
|
|
# define UNDOCARGS_0
|
|
# define UNDOC2ARGS_0
|
|
|
|
# define DOCARGS_1 str r0, [sp, #-4]!;
|
|
# define UNDOCARGS_1 ldr r0, [sp], #4;
|
|
# define UNDOC2ARGS_1
|
|
|
|
# define DOCARGS_2 str r1, [sp, #-4]!; str r0, [sp, #-4]!;
|
|
# define UNDOCARGS_2 ldr r0, [sp], #4; ldr r1, [sp], #4;
|
|
# define UNDOC2ARGS_2
|
|
|
|
# define DOCARGS_3 str r2, [sp, #-4]!; str r1, [sp, #-4]!; str r0, [sp, #-4]!;
|
|
# define UNDOCARGS_3 ldr r0, [sp], #4; ldr r1, [sp], #4; ldr r2, [sp], #4
|
|
# define UNDOC2ARGS_3
|
|
|
|
# define DOCARGS_4 stmfd sp!, {r0-r3}
|
|
# define UNDOCARGS_4 ldmfd sp!, {r0-r3}
|
|
# define UNDOC2ARGS_4
|
|
|
|
# define DOCARGS_5 stmfd sp!, {r0-r3}
|
|
# define UNDOCARGS_5 ldmfd sp, {r0-r3}; str r4, [sp, #-4]!; ldr r4, [sp, #24]
|
|
# define UNDOC2ARGS_5 ldr r4, [sp], #20
|
|
|
|
# ifdef IS_IN_libpthread
|
|
# define CENABLE bl PLTJMP(__pthread_enable_asynccancel)
|
|
# define CDISABLE bl PLTJMP(__pthread_disable_asynccancel)
|
|
# define __local_multiple_threads __pthread_multiple_threads
|
|
# else
|
|
# define CENABLE bl PLTJMP(__libc_enable_asynccancel)
|
|
# define CDISABLE bl PLTJMP(__libc_disable_asynccancel)
|
|
# define __local_multiple_threads __libc_multiple_threads
|
|
# endif
|
|
|
|
# ifndef __ASSEMBLER__
|
|
extern int __local_multiple_threads attribute_hidden;
|
|
# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
|
|
# else
|
|
# if !defined PIC
|
|
# define SINGLE_THREAD_P_INT \
|
|
ldr ip, =__local_multiple_threads; \
|
|
ldr ip, [ip]; \
|
|
teq ip, #0;
|
|
# define SINGLE_THREAD_P SINGLE_THREAD_P_INT
|
|
# define MAYBE_SAVE_LR \
|
|
str lr, [sp, $-4]!;
|
|
# define PSEUDO_RET_MOV \
|
|
RETINSTR(cc, lr); \
|
|
b PLTJMP(SYSCALL_ERROR)
|
|
# define PSEUDO_PROLOGUE
|
|
# else
|
|
# define SINGLE_THREAD_P_PIC(reg) \
|
|
ldr ip, 1b; \
|
|
ldr reg, 2b; \
|
|
3: \
|
|
add ip, pc, ip; \
|
|
ldr ip, [ip, reg]; \
|
|
teq ip, #0;
|
|
# define SINGLE_THREAD_P_INT \
|
|
str lr, [sp, $-4]!; \
|
|
SINGLE_THREAD_P_PIC(lr)
|
|
# define SINGLE_THREAD_P \
|
|
SINGLE_THREAD_P_INT; \
|
|
ldr lr, [sp], $4
|
|
# define PSEUDO_PROLOGUE \
|
|
1: .word _GLOBAL_OFFSET_TABLE_ - 3f - 8; \
|
|
2: .word __local_multiple_threads(GOTOFF);
|
|
# define MAYBE_SAVE_LR /* lr already saved */
|
|
# define PSEUDO_RET_MOV PSEUDO_RET
|
|
# endif
|
|
# endif
|
|
|
|
#elif !defined __ASSEMBLER__
|
|
|
|
/* This code should never be used but we define it anyhow. */
|
|
# define SINGLE_THREAD_P (1)
|
|
|
|
#endif
|