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(PSEUDO_RET): Correctly unstack lr.

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(UNDOARGS_5): Fix ordering of pushes and pops.
(SINGLE_THREAD_P_PIC): New.
(SINGLE_THREAD_P_INT): Likewise.
(SINGLE_THREAD_P): Implement in terms of above.  Restore lr if it was stacked.
(PSEUDO): Use SINGLE_THREAD_P_INT.
This commit is contained in:
Ulrich Drepper 2003-01-12 09:14:25 +00:00
parent 191cbebf58
commit e62ed29b3b
1 changed files with 13 additions and 6 deletions
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19
sysdeps/unix/sysv/linux/arm/linuxthreads/sysdep-cancel.h
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@ -27,6 +27,7 @@
# undef PSEUDO_RET # undef PSEUDO_RET
# define PSEUDO_RET \ # define PSEUDO_RET \
ldrcc pc, [sp], $4; \ ldrcc pc, [sp], $4; \
ldr lr, [sp], $4; \
b PLTJMP(SYSCALL_ERROR) b PLTJMP(SYSCALL_ERROR)
# undef PSEUDO # undef PSEUDO
@ -34,7 +35,7 @@
.section ".text"; \ .section ".text"; \
PSEUDO_PROLOGUE; \ PSEUDO_PROLOGUE; \
ENTRY (name) \ ENTRY (name) \
SINGLE_THREAD_P; \ SINGLE_THREAD_P_INT; \
bne .Lpseudo_cancel; \ bne .Lpseudo_cancel; \
DO_CALL (syscall_name, args); \ DO_CALL (syscall_name, args); \
cmn r0, $4096; \ cmn r0, $4096; \
@ -74,7 +75,7 @@
# define UNDOC2ARGS_4 # define UNDOC2ARGS_4
# define DOCARGS_5 stmfd sp!, {r0-r3} # define DOCARGS_5 stmfd sp!, {r0-r3}
# define UNDOCARGS_5 str r4, [sp, #-4]!; ldmfd sp, {r0-r4} # define UNDOCARGS_5 ldmfd sp, {r0-r3}; str r4, [sp, #-4]!; ldr r4, [sp, #24]
# define UNDOC2ARGS_5 ldr r4, [sp], #20 # define UNDOC2ARGS_5 ldr r4, [sp], #20
# ifdef IS_IN_libpthread # ifdef IS_IN_libpthread
@ -92,10 +93,11 @@ extern int __local_multiple_threads attribute_hidden;
# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1) # define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
# else # else
# if !defined PIC # if !defined PIC
# define SINGLE_THREAD_P \ # define SINGLE_THREAD_P_INT \
ldr ip, =__local_multiple_threads; \ ldr ip, =__local_multiple_threads; \
ldr ip, [ip]; \ ldr ip, [ip]; \
teq ip, #0; teq ip, #0;
# define SINGLE_THREAD_P SINGLE_THREAD_P_INT
# define MAYBE_SAVE_LR \ # define MAYBE_SAVE_LR \
str lr, [sp, $-4]!; str lr, [sp, $-4]!;
# define PSEUDO_RET_MOV \ # define PSEUDO_RET_MOV \
@ -103,14 +105,19 @@ extern int __local_multiple_threads attribute_hidden;
b PLTJMP(SYSCALL_ERROR) b PLTJMP(SYSCALL_ERROR)
# define PSEUDO_PROLOGUE # define PSEUDO_PROLOGUE
# else # else
# define SINGLE_THREAD_P \ # define SINGLE_THREAD_P_PIC(reg) \
str lr, [sp, $-4]!; \
ldr ip, 1b; \ ldr ip, 1b; \
ldr lr, 2b; \ ldr reg, 2b; \
3: \ 3: \
add ip, pc, ip; \ add ip, pc, ip; \
ldr ip, [ip, lr]; \ ldr ip, [ip, lr]; \
teq ip, #0; 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 \ # define PSEUDO_PROLOGUE \
1: .word _GLOBAL_OFFSET_TABLE_ - 3f - 8; \ 1: .word _GLOBAL_OFFSET_TABLE_ - 3f - 8; \
2: .word __local_multiple_threads(GOTOFF); 2: .word __local_multiple_threads(GOTOFF);