diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h | 74 |
1 files changed, 8 insertions, 66 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h b/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h index 65980102be..c1c07199ff 100644 --- a/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h +++ b/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h @@ -18,92 +18,34 @@ #include <sysdep.h> #include <tls.h> -#ifndef __ASSEMBLER__ -# include <nptl/pthreadP.h> -#endif +#include <nptl/pthreadP.h> #if IS_IN (libc) || IS_IN (libpthread) || 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; \ - ENTRY (name) \ - SINGLE_THREAD_P; \ - jne L(pseudo_cancel); \ - .type __##syscall_name##_nocancel,@function; \ - .globl __##syscall_name##_nocancel; \ - __##syscall_name##_nocancel: \ - DO_CALL (syscall_name, args); \ - cmpq $-4095, %rax; \ - jae SYSCALL_ERROR_LABEL; \ - ret; \ - .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \ - L(pseudo_cancel): \ - /* We always have to align the stack before calling a function. */ \ - subq $8, %rsp; cfi_adjust_cfa_offset (8); \ - CENABLE \ - /* The return value from CENABLE is argument for CDISABLE. */ \ - movq %rax, (%rsp); \ - DO_CALL (syscall_name, args); \ - movq (%rsp), %rdi; \ - /* Save %rax since it's the error code from the syscall. */ \ - movq %rax, %rdx; \ - CDISABLE \ - movq %rdx, %rax; \ - addq $8,%rsp; cfi_adjust_cfa_offset (-8); \ - cmpq $-4095, %rax; \ - jae SYSCALL_ERROR_LABEL - - # if IS_IN (libpthread) -# define CENABLE call __pthread_enable_asynccancel; -# define CDISABLE call __pthread_disable_asynccancel; # define __local_multiple_threads __pthread_multiple_threads # elif IS_IN (libc) -# define CENABLE call __libc_enable_asynccancel; -# define CDISABLE call __libc_disable_asynccancel; # define __local_multiple_threads __libc_multiple_threads # elif IS_IN (librt) -# define CENABLE call __librt_enable_asynccancel; -# define CDISABLE call __librt_disable_asynccancel; # else # error Unsupported library # endif # if IS_IN (libpthread) || IS_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 cmpl $0, __local_multiple_threads(%rip) -# endif - +# define SINGLE_THREAD_P \ + __glibc_likely (__local_multiple_threads == 0) # else - -# ifndef __ASSEMBLER__ -# define SINGLE_THREAD_P \ - __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ - header.multiple_threads) == 0, 1) -# else -# define SINGLE_THREAD_P cmpl $0, %fs:MULTIPLE_THREADS_OFFSET -# endif - +# define SINGLE_THREAD_P \ + __glibc_likely (THREAD_GETMEM (THREAD_SELF, header.multiple_threads) == 0) # endif -#elif !defined __ASSEMBLER__ +#else # define SINGLE_THREAD_P (1) # define NO_CANCELLATION 1 #endif -#ifndef __ASSEMBLER__ -# define RTLD_SINGLE_THREAD_P \ - __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ - header.multiple_threads) == 0, 1) -#endif +#define RTLD_SINGLE_THREAD_P \ + __glibc_likely (THREAD_GETMEM (THREAD_SELF, header.multiple_threads) == 0) |