diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h | 60 |
1 files changed, 22 insertions, 38 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h index 350d9af50..95d532802 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h @@ -24,11 +24,6 @@ #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt -/* NOTE: We do mark syscalls with unwind annotations, for the benefit of - cancellation; but they're really only accurate at the point of the - syscall. The ARM unwind directives are not rich enough without adding - a custom personality function. */ - # undef PSEUDO # define PSEUDO(name, syscall_name, args) \ .section ".text"; \ @@ -48,55 +43,38 @@ cmn r0, $4096; \ PSEUDO_RET; \ .Lpseudo_cancel: \ - .fnstart; \ DOCARGS_##args; /* save syscall args etc. around CENABLE. */ \ CENABLE; \ mov ip, r0; /* put mask in safe place. */ \ UNDOCARGS_##args; /* restore syscall args. */ \ - ldr r7, =SYS_ify (syscall_name); \ - swi 0x0; /* do the call. */ \ - .fnend; /* Past here we can't easily unwind. */ \ - mov r7, r0; /* save syscall return value. */ \ + swi SYS_ify (syscall_name); /* do the call. */ \ + str r0, [sp, $-4]!; /* save syscall return value. */ \ mov r0, ip; /* get mask back. */ \ CDISABLE; \ - mov r0, r7; /* retrieve return value. */ \ - RESTORE_LR_##args; \ + ldmfd sp!, {r0, lr}; /* retrieve return value and address. */ \ UNDOARGS_##args; \ cmn r0, $4096; -/* DOARGS pushes four bytes on the stack for five arguments, eight bytes for - six arguments, and nothing for fewer. In order to preserve doubleword - alignment, sometimes we must save an extra register. */ - -# define RESTART_UNWIND .fnend; .fnstart; .save {r7, lr} - -# define DOCARGS_0 stmfd sp!, {r7, lr}; .save {r7, lr} +# define DOCARGS_0 str lr, [sp, #-4]!; # define UNDOCARGS_0 -# define RESTORE_LR_0 ldmfd sp!, {r7, lr}; -# define DOCARGS_1 stmfd sp!, {r0, r1, r7, lr}; .save {r7, lr}; .pad #8 -# define UNDOCARGS_1 ldr r0, [sp], #8; RESTART_UNWIND -# define RESTORE_LR_1 RESTORE_LR_0 +# define DOCARGS_1 stmfd sp!, {r0, lr}; +# define UNDOCARGS_1 ldr r0, [sp], #4; -# define DOCARGS_2 stmfd sp!, {r0, r1, r7, lr}; .save {r7, lr}; .pad #8 -# define UNDOCARGS_2 ldmfd sp!, {r0, r1}; RESTART_UNWIND -# define RESTORE_LR_2 RESTORE_LR_0 +# define DOCARGS_2 stmfd sp!, {r0, r1, lr}; +# define UNDOCARGS_2 ldmfd sp!, {r0, r1}; -# define DOCARGS_3 stmfd sp!, {r0, r1, r2, r3, r7, lr}; .save {r7, lr}; .pad #16 -# define UNDOCARGS_3 ldmfd sp!, {r0, r1, r2, r3}; RESTART_UNWIND -# define RESTORE_LR_3 RESTORE_LR_0 +# define DOCARGS_3 stmfd sp!, {r0, r1, r2, lr}; +# define UNDOCARGS_3 ldmfd sp!, {r0, r1, r2}; -# define DOCARGS_4 stmfd sp!, {r0, r1, r2, r3, r7, lr}; .save {r7, lr}; .pad #16 -# define UNDOCARGS_4 ldmfd sp!, {r0, r1, r2, r3}; RESTART_UNWIND -# define RESTORE_LR_4 RESTORE_LR_0 +# define DOCARGS_4 stmfd sp!, {r0, r1, r2, r3, lr}; +# define UNDOCARGS_4 ldmfd sp!, {r0, r1, r2, r3}; -# define DOCARGS_5 .save {r4}; stmfd sp!, {r0, r1, r2, r3, r4, r7, lr}; .save {r7, lr}; .pad #20 -# define UNDOCARGS_5 ldmfd sp!, {r0, r1, r2, r3}; .fnend; .fnstart; .save {r4}; .save {r7, lr}; .pad #4 -# define RESTORE_LR_5 ldmfd sp!, {r4, r7, lr} +# define DOCARGS_5 DOCARGS_4 +# define UNDOCARGS_5 UNDOCARGS_4 -# define DOCARGS_6 .save {r4, r5}; stmfd sp!, {r0, r1, r2, r3, r7, lr}; .save {r7, lr}; .pad #20 -# define UNDOCARGS_6 ldmfd sp!, {r0, r1, r2, r3}; .fnend; .fnstart; .save {r4, r5}; .save {r7, lr} -# define RESTORE_LR_6 RESTORE_LR_0 +# define DOCARGS_6 DOCARGS_5 +# define UNDOCARGS_6 UNDOCARGS_5 # ifdef IS_IN_libpthread # define CENABLE bl PLTJMP(__pthread_enable_asynccancel) @@ -151,3 +129,9 @@ extern int __local_multiple_threads attribute_hidden; # define NO_CANCELLATION 1 #endif + +#ifndef __ASSEMBLER__ +# define RTLD_SINGLE_THREAD_P \ + __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0, 1) +#endif |