diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h | 63 |
1 files changed, 18 insertions, 45 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h index 97debaba9..1c93952d4 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. +/* Copyright (C) 2002-2006, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2002. @@ -20,11 +20,15 @@ #include <sysdep.h> #include <tls.h> #ifndef __ASSEMBLER__ -# include <nptl/pthreadP.h> +# include <pthreadP.h> #endif #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt +/* The code to disable cancellation depends on the fact that the called + functions are special. They don't modify registers other than %rax + and %r11 if they return. Therefore we don't have to preserve other + registers around these calls. */ # undef PSEUDO # define PSEUDO(name, syscall_name, args) \ .text; \ @@ -40,60 +44,23 @@ ret; \ .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \ L(pseudo_cancel): \ - /* Save registers that might get destroyed. */ \ - SAVESTK_##args \ - PUSHARGS_##args \ + /* We always have to align the stack before calling a function. */ \ + subq $8, %rsp; cfi_adjust_cfa_offset (8); \ CENABLE \ - /* Restore registers. */ \ - POPARGS_##args \ /* The return value from CENABLE is argument for CDISABLE. */ \ movq %rax, (%rsp); \ - movl $SYS_ify (syscall_name), %eax; \ - syscall; \ + DO_CALL (syscall_name, args); \ movq (%rsp), %rdi; \ /* Save %rax since it's the error code from the syscall. */ \ - movq %rax, 8(%rsp); \ + movq %rax, %rdx; \ CDISABLE \ - movq 8(%rsp), %rax; \ - RESTSTK_##args \ + movq %rdx, %rax; \ + addq $8,%rsp; cfi_adjust_cfa_offset (-8); \ cmpq $-4095, %rax; \ jae SYSCALL_ERROR_LABEL; \ L(pseudo_end): -# define PUSHARGS_0 /* Nothing. */ -# define PUSHARGS_1 PUSHARGS_0 movq %rdi, 8(%rsp); -# define PUSHARGS_2 PUSHARGS_1 movq %rsi, 16(%rsp); -# define PUSHARGS_3 PUSHARGS_2 movq %rdx, 24(%rsp); -# define PUSHARGS_4 PUSHARGS_3 movq %rcx, 32(%rsp); -# define PUSHARGS_5 PUSHARGS_4 movq %r8, 40(%rsp); -# define PUSHARGS_6 PUSHARGS_5 movq %r9, 48(%rsp); - -# define POPARGS_0 /* Nothing. */ -# define POPARGS_1 POPARGS_0 movq 8(%rsp), %rdi; -# define POPARGS_2 POPARGS_1 movq 16(%rsp), %rsi; -# define POPARGS_3 POPARGS_2 movq 24(%rsp), %rdx; -# define POPARGS_4 POPARGS_3 movq 32(%rsp), %r10; -# define POPARGS_5 POPARGS_4 movq 40(%rsp), %r8; -# define POPARGS_6 POPARGS_5 movq 48(%rsp), %r9; - -/* We always have to align the stack before calling a function. */ -# define SAVESTK_0 subq $24, %rsp; cfi_adjust_cfa_offset (24); -# define SAVESTK_1 SAVESTK_0 -# define SAVESTK_2 SAVESTK_1 -# define SAVESTK_3 subq $40, %rsp; cfi_adjust_cfa_offset (40); -# define SAVESTK_4 SAVESTK_3 -# define SAVESTK_5 subq $56, %rsp; cfi_adjust_cfa_offset (56); -# define SAVESTK_6 SAVESTK_5 - -# define RESTSTK_0 addq $24,%rsp; cfi_adjust_cfa_offset (-24); -# define RESTSTK_1 RESTSTK_0 -# define RESTSTK_2 RESTSTK_1 -# define RESTSTK_3 addq $40, %rsp; cfi_adjust_cfa_offset (-40); -# define RESTSTK_4 RESTSTK_3 -# define RESTSTK_5 addq $56, %rsp; cfi_adjust_cfa_offset (-56); -# define RESTSTK_6 RESTSTK_5 - # ifdef IS_IN_libpthread # define CENABLE call __pthread_enable_asynccancel; # define CDISABLE call __pthread_disable_asynccancel; @@ -136,3 +103,9 @@ 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 |