diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h | 157 |
1 files changed, 91 insertions, 66 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h index f156f9241a..3c6492aeca 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h @@ -1,5 +1,4 @@ -/* Copyright (C) 1997, 2000, 2002, 2003, 2004, 2006 - Free Software Foundation, Inc. +/* Copyright (C) 1997, 2000, 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997. @@ -26,7 +25,6 @@ #ifdef IS_IN_rtld # include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */ #endif -#include <tls.h> #undef SYS_ify #define SYS_ify(syscall_name) __NR_##syscall_name @@ -49,52 +47,99 @@ #undef PSEUDO #undef PSEUDO_NOERRNO #undef PSEUDO_ERRVAL -#undef PSEUDO_END #undef ENTRY -#undef END -#define ENTRY(name) \ - .align 4; \ - .global C_SYMBOL_NAME(name); \ - .type name, @function; \ -C_LABEL(name) \ - cfi_startproc; - -#define END(name) \ - cfi_endproc; \ - .size name, . - name - - /* If the offset to __syscall_error fits into a signed 22-bit - * immediate branch offset, the linker will relax the call into - * a normal branch. - */ -#define PSEUDO(name, syscall_name, args) \ - .text; \ - .globl __syscall_error; \ -ENTRY(name); \ - LOADSYSCALL(syscall_name); \ - ta 0x6d; \ - bcc,pt %xcc, 1f; \ - mov %o7, %g1; \ - call __syscall_error; \ - mov %g1, %o7; \ -1: - -#define PSEUDO_NOERRNO(name, syscall_name, args)\ - .text; \ -ENTRY(name); \ - LOADSYSCALL(syscall_name); \ - ta 0x6d; - -#define PSEUDO_ERRVAL(name, syscall_name, args) \ - .text; \ -ENTRY(name); \ - LOADSYSCALL(syscall_name); \ - ta 0x6d; - -#define PSEUDO_END(name) \ - END(name) +#define ENTRY(name) \ + .global C_SYMBOL_NAME(name); \ + .align 2; \ + C_LABEL(name); \ + .type name,@function; + +#ifdef LINKER_HANDLES_R_SPARC_WDISP22 +/* Unfortunately, we cannot do this yet. Linker doesn't seem to + handle R_SPARC_WDISP22 against non-STB_LOCAL symbols properly . */ +# define SYSCALL_ERROR_HANDLER_ENTRY(handler) \ + .section .gnu.linkonce.t.handler,"ax",@progbits; \ + .globl handler; \ + .hidden handler; \ + .type handler,@function; \ +handler: +#else +# define SYSCALL_ERROR_HANDLER_ENTRY(handler) \ + .subsection 3; \ +handler: +#endif + +#if RTLD_PRIVATE_ERRNO +# define SYSCALL_ERROR_HANDLER \ + .section .gnu.linkonce.t.__sparc64.get_pic.l7,"ax",@progbits; \ + .globl __sparc64.get_pic.l7; \ + .hidden __sparc64.get_pic.l7; \ + .type __sparc64.get_pic.l7,@function; \ +__sparc64.get_pic.l7: \ + retl; \ + add %o7, %l7, %l7; \ + .previous; \ +SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler) \ + save %sp, -192, %sp; \ + sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7; \ + call __sparc64.get_pic.l7; \ + add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7; \ + ldx [%l7 + rtld_errno], %l0; \ + st %i0, [%l0]; \ + jmpl %i7+8, %g0; \ + restore %g0, -1, %o0; \ + .previous; +#else +# define SYSCALL_ERROR_HANDLER \ +SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler) \ + .global __errno_location; \ + .type __errno_location,@function; \ + save %sp, -192, %sp; \ + call __errno_location; \ + nop; \ + st %i0, [%o0]; \ + jmpl %i7+8, %g0; \ + restore %g0, -1, %o0; \ + .previous; +#endif + +#define PSEUDO(name, syscall_name, args) \ + .text; \ + ENTRY(name); \ + LOADSYSCALL(syscall_name); \ + ta 0x6d; \ + bcs,pn %xcc, __syscall_error_handler; \ + nop; \ + SYSCALL_ERROR_HANDLER + +#define PSEUDO_NOERRNO(name, syscall_name, args) \ + .text; \ + ENTRY(name); \ + LOADSYSCALL(syscall_name); \ + ta 0x6d + +#define PSEUDO_ERRVAL(name, syscall_name, args) \ + .text; \ + ENTRY(name); \ + LOADSYSCALL(syscall_name); \ + ta 0x6d +#undef PSEUDO_END +#define PSEUDO_END(name) \ + .size name,.-name + +#undef PSEUDO_END_NOERRNO +#define PSEUDO_END_NOERRNO(name) \ + .size name,.-name + +#undef PSEUDO_END_ERRVAL +#define PSEUDO_END_ERRVAL(name) \ + .size name,.-name + +#undef END +#define END(name) \ + .size name,.-name /* Careful here! This "ret" define can interfere; use jmpl if unsure. */ #define ret retl; nop @@ -152,24 +197,4 @@ ENTRY(name); \ register windows. So if you poke stack memory directly you add this. */ #define STACK_BIAS 2047 -/* Pointer mangling support. */ -#if defined NOT_IN_libc && defined IS_IN_rtld -/* We cannot use the thread descriptor because in ld.so we use setjmp - earlier than the descriptor is initialized. */ -#else -# ifdef __ASSEMBLER__ -# define PTR_MANGLE(dreg, reg, tmpreg) \ - ldx [%g7 + POINTER_GUARD], tmpreg; \ - xor reg, tmpreg, dreg -# define PTR_DEMANGLE(dreg, reg, tmpreg) PTR_MANGLE (dreg, reg, tmpreg) -# define PTR_MANGLE2(dreg, reg, tmpreg) \ - xor reg, tmpreg, dreg -# define PTR_DEMANGLE2(dreg, reg, tmpreg) PTR_MANGLE2 (dreg, reg, tmpreg) -# else -# define PTR_MANGLE(var) \ - (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ()) -# define PTR_DEMANGLE(var) PTR_MANGLE (var) -# endif -#endif - #endif /* linux/sparc64/sysdep.h */ |