diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sysdep.h | 72 |
1 files changed, 33 insertions, 39 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h index 730c4df..a6f18ec 100644 --- a/sysdeps/unix/sysv/linux/i386/sysdep.h +++ b/sysdeps/unix/sysv/linux/i386/sysdep.h @@ -24,6 +24,7 @@ #include <sysdeps/unix/i386/sysdep.h> #include <bp-sym.h> #include <bp-asm.h> +#include <tls.h> /* For Linux we can use the system call table in the header file /usr/include/asm/unistd.h @@ -72,34 +73,47 @@ END (name) #ifndef PIC -#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ +# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ #else -/* Store (- %eax) into errno through the GOT. */ -#ifdef _LIBC_REENTRANT # ifndef HAVE_HIDDEN -# define SETUP_PIC_REG \ +# define SETUP_PIC_REG(reg) \ call 1f; \ .subsection 1; \ -1:movl (%esp), %ebx; \ +1:movl (%esp), %e##reg; \ ret; \ .previous # else -# define SETUP_PIC_REG \ - .section .gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits; \ - .globl __i686.get_pc_thunk.bx; \ - .hidden __i686.get_pc_thunk.bx; \ - .type __i686.get_pc_thunk.bx,@function; \ -__i686.get_pc_thunk.bx: \ - movl (%esp), %ebx; \ +# define SETUP_PIC_REG(reg) \ + .section .gnu.linkonce.t.__i686.get_pc_thunk.reg,"ax",@progbits; \ + .globl __i686.get_pc_thunk.reg; \ + .hidden __i686.get_pc_thunk.reg; \ + .type __i686.get_pc_thunk.reg,@function; \ +__i686.get_pc_thunk.reg: \ + movl (%esp), %e##reg; \ ret; \ .previous; \ - call __i686.get_pc_thunk.bx + call __i686.get_pc_thunk.reg # endif -#define SYSCALL_ERROR_HANDLER \ +/* Store (- %eax) into errno through the GOT. */ +# ifdef _LIBC_REENTRANT + +# if USE_TLS && HAVE___THREAD +# define SYSCALL_ERROR_HANDLER \ +0:SETUP_PIC_REG (cx); \ + addl $_GLOBAL_OFFSET_TABLE_, %ecx; \ + xorl %edx, %edx; \ + subl %eax, %edx; \ + movl %gs:0, %eax; \ + subl errno@gottpoff(%ecx), %eax; \ + movl %edx, (%eax); \ + orl $-1, %eax; \ + jmp L(pseudo_end); +# else +# define SYSCALL_ERROR_HANDLER \ 0:pushl %ebx; \ - SETUP_PIC_REG; \ + SETUP_PIC_REG (bx); \ addl $_GLOBAL_OFFSET_TABLE_, %ebx; \ xorl %edx, %edx; \ subl %eax, %edx; \ @@ -114,30 +128,10 @@ __i686.get_pc_thunk.bx: \ jmp L(pseudo_end); /* A quick note: it is assumed that the call to `__errno_location' does not modify the stack! */ -#else - -# ifndef HAVE_HIDDEN -# define SETUP_PIC_REG \ - call 1f; \ - .subsection 1; \ -1:movl (%esp), %ecx; \ - ret; \ - .previous +# endif # else -# define SETUP_PIC_REG \ - .section .gnu.linkonce.t.__i686.get_pc_thunk.cx,"ax",@progbits; \ - .globl __i686.get_pc_thunk.cx; \ - .hidden __i686.get_pc_thunk.cx; \ - .type __i686.get_pc_thunk.cx,@function; \ -__i686.get_pc_thunk.cx: \ - movl (%esp), %ecx; \ - ret; \ - .previous; \ - call __i686.get_pc_thunk.cx -# endif - -#define SYSCALL_ERROR_HANDLER \ -0:define SETUP_PIC_REG; \ +# define SYSCALL_ERROR_HANDLER \ +0:define SETUP_PIC_REG(cx); \ addl $_GLOBAL_OFFSET_TABLE_, %ecx; \ xorl %edx, %edx; \ subl %eax, %edx; \ @@ -145,7 +139,7 @@ __i686.get_pc_thunk.cx: \ movl %edx, (%ecx); \ orl $-1, %eax; \ jmp L(pseudo_end); -#endif /* _LIBC_REENTRANT */ +# endif /* _LIBC_REENTRANT */ #endif /* PIC */ /* Linux takes system call arguments in registers: |