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