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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.h212
1 files changed, 5 insertions, 207 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 6f683ab72..ab2a2de52 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h
@@ -1,5 +1,4 @@
-/* Copyright (C) 2003, 2004, 2005, 2009 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
+/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -23,222 +22,23 @@
#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"; \
- PSEUDO_PROLOGUE; \
- .type __##syscall_name##_nocancel,%function; \
- .globl __##syscall_name##_nocancel; \
- __##syscall_name##_nocancel: \
- cfi_sections(.debug_frame); \
- cfi_startproc; \
- DO_CALL (syscall_name, args); \
- PSEUDO_RET; \
- cfi_endproc; \
- .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
- ENTRY (name); \
- SINGLE_THREAD_P; \
- DOARGS_##args; \
- bne .Lpseudo_cancel; \
- cfi_remember_state; \
- DO_CALL (syscall_name, 0); \
- UNDOARGS_##args; \
- cmn r0, $4096; \
- PSEUDO_RET; \
- cfi_restore_state; \
- .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. */ \
- mov r0, ip; /* get mask back. */ \
- CDISABLE; \
- mov r0, r7; /* retrieve return value. */ \
- RESTORE_LR_##args; \
- 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}; \
- cfi_adjust_cfa_offset (8); \
- cfi_rel_offset (r7, 0); \
- cfi_rel_offset (lr, 4); \
- .save {r7, lr}
-# define UNDOCARGS_0
-# define RESTORE_LR_0 \
- ldmfd sp!, {r7, lr}; \
- cfi_adjust_cfa_offset (-8); \
- cfi_restore (r7); \
- cfi_restore (lr)
-
-# define DOCARGS_1 \
- stmfd sp!, {r0, r1, r7, lr}; \
- cfi_adjust_cfa_offset (16); \
- cfi_rel_offset (r7, 8); \
- cfi_rel_offset (lr, 12); \
- .save {r7, lr}; \
- .pad #8
-# define UNDOCARGS_1 \
- ldr r0, [sp], #8; \
- cfi_adjust_cfa_offset (-8); \
- RESTART_UNWIND
-# define RESTORE_LR_1 \
- RESTORE_LR_0
-
-# define DOCARGS_2 \
- stmfd sp!, {r0, r1, r7, lr}; \
- cfi_adjust_cfa_offset (16); \
- cfi_rel_offset (r7, 8); \
- cfi_rel_offset (lr, 12); \
- .save {r7, lr}; \
- .pad #8
-# define UNDOCARGS_2 \
- ldmfd sp!, {r0, r1}; \
- cfi_adjust_cfa_offset (-8); \
- RESTART_UNWIND
-# define RESTORE_LR_2 \
- RESTORE_LR_0
-
-# define DOCARGS_3 \
- stmfd sp!, {r0, r1, r2, r3, r7, lr}; \
- cfi_adjust_cfa_offset (24); \
- cfi_rel_offset (r7, 16); \
- cfi_rel_offset (lr, 20); \
- .save {r7, lr}; \
- .pad #16
-# define UNDOCARGS_3 \
- ldmfd sp!, {r0, r1, r2, r3}; \
- cfi_adjust_cfa_offset (-16); \
- RESTART_UNWIND
-# define RESTORE_LR_3 \
- RESTORE_LR_0
-
-# define DOCARGS_4 \
- stmfd sp!, {r0, r1, r2, r3, r7, lr}; \
- cfi_adjust_cfa_offset (24); \
- cfi_rel_offset (r7, 16); \
- cfi_rel_offset (lr, 20); \
- .save {r7, lr}; \
- .pad #16
-# define UNDOCARGS_4 \
- ldmfd sp!, {r0, r1, r2, r3}; \
- cfi_adjust_cfa_offset (-16); \
- RESTART_UNWIND
-# define RESTORE_LR_4 \
- RESTORE_LR_0
-
-/* r4 is only stmfd'ed for correct stack alignment. */
-# define DOCARGS_5 \
- .save {r4}; \
- stmfd sp!, {r0, r1, r2, r3, r4, r7, lr}; \
- cfi_adjust_cfa_offset (28); \
- cfi_rel_offset (r7, 20); \
- cfi_rel_offset (lr, 24); \
- .save {r7, lr}; \
- .pad #20
-# define UNDOCARGS_5 \
- ldmfd sp!, {r0, r1, r2, r3}; \
- cfi_adjust_cfa_offset (-16); \
- .fnend; \
- .fnstart; \
- .save {r4}; \
- .save {r7, lr}; \
- .pad #4
-# define RESTORE_LR_5 \
- ldmfd sp!, {r4, r7, lr}; \
- cfi_adjust_cfa_offset (-12); \
- /* r4 will be marked as restored later. */ \
- cfi_restore (r7); \
- cfi_restore (lr)
-
-# define DOCARGS_6 \
- .save {r4, r5}; \
- stmfd sp!, {r0, r1, r2, r3, r7, lr}; \
- cfi_adjust_cfa_offset (24); \
- cfi_rel_offset (r7, 16); \
- cfi_rel_offset (lr, 20); \
- .save {r7, lr}; \
- .pad #16
-# define UNDOCARGS_6 \
- ldmfd sp!, {r0, r1, r2, r3}; \
- cfi_adjust_cfa_offset (-16); \
- .fnend; \
- .fnstart; \
- .save {r4, r5}; \
- .save {r7, lr}
-# define RESTORE_LR_6 \
- RESTORE_LR_0
-
# 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
# elif !defined NOT_IN_libc
-# define CENABLE bl PLTJMP(__libc_enable_asynccancel)
-# define CDISABLE bl PLTJMP(__libc_disable_asynccancel)
# define __local_multiple_threads __libc_multiple_threads
-# elif defined IS_IN_librt
-# define CENABLE bl PLTJMP(__librt_enable_asynccancel)
-# define CDISABLE bl PLTJMP(__librt_disable_asynccancel)
-# else
-# error Unsupported library
# endif
# if defined IS_IN_libpthread || !defined NOT_IN_libc
-# ifndef __ASSEMBLER__
extern int __local_multiple_threads attribute_hidden;
-# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
-# else
-# define SINGLE_THREAD_P \
- ldr ip, 1b; \
-2: \
- ldr ip, [pc, ip]; \
- teq ip, #0;
-# define PSEUDO_PROLOGUE \
- 1: .word __local_multiple_threads - 2f - 8;
-# endif
+# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
# else
/* There is no __local_multiple_threads for librt, so use the TCB. */
-# ifndef __ASSEMBLER__
-# define SINGLE_THREAD_P \
+# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
-# else
-# define PSEUDO_PROLOGUE
-# define SINGLE_THREAD_P \
- stmfd sp!, {r0, lr}; \
- cfi_adjust_cfa_offset (8); \
- cfi_rel_offset (lr, 4); \
- bl __aeabi_read_tp; \
- ldr ip, [r0, #MULTIPLE_THREADS_OFFSET]; \
- ldmfd sp!, {r0, lr}; \
- cfi_adjust_cfa_offset (-8); \
- cfi_restore (lr); \
- teq ip, #0
-# define SINGLE_THREAD_P_PIC(x) SINGLE_THREAD_P
-# endif
# endif
-#elif !defined __ASSEMBLER__
+#else
/* For rtld, et cetera. */
# define SINGLE_THREAD_P 1
@@ -246,8 +46,6 @@ extern int __local_multiple_threads attribute_hidden;
#endif
-#ifndef __ASSEMBLER__
-# define RTLD_SINGLE_THREAD_P \
+#define RTLD_SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-28 02:46:04 +0000