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Diffstat (limited to 'sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h')
-rw-r--r--sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h177
1 files changed, 60 insertions, 117 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
index 29c5158b9f..c808a97fc5 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Miguel de Icaza <miguel@gnu.ai.mit.edu>, January 1997.
@@ -38,131 +38,54 @@
#undef PSEUDO
#undef PSEUDO_NOERRNO
#undef PSEUDO_ERRVAL
+#undef PSEUDO_END
#undef ENTRY
#undef END
#undef LOC
-#define ENTRY(name) \
- .global C_SYMBOL_NAME(name); \
- .align 4;\
- C_LABEL(name);\
- .type name,@function;
+#define ENTRY(name) \
+ .align 4; \
+ .global C_SYMBOL_NAME(name); \
+ .type name, @function; \
+C_LABEL(name) \
+ cfi_startproc;
-#define END(name) \
+#define END(name) \
+ cfi_endproc; \
.size name, . - name
#define LOC(name) .L##name
-#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.__sparc_get_pic_l7,"ax",@progbits; \
- .globl __sparc_get_pic_l7; \
- .hidden __sparc_get_pic_l7; \
- .type __sparc_get_pic_l7,@function; \
-__sparc_get_pic_l7: \
- retl; \
- add %o7, %l7, %l7; \
- .previous; \
-SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler) \
- save %sp,-96,%sp; \
- sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7; \
- call __sparc_get_pic_l7; \
- add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7; \
- ld [%l7 + rtld_errno], %l0; \
- st %i0, [%l0]; \
- jmpl %i7+8, %g0; \
- restore %g0, -1, %o0; \
- .previous;
-#elif USE___THREAD
-# ifndef NOT_IN_libc
-# define SYSCALL_ERROR_ERRNO __libc_errno
-# else
-# define SYSCALL_ERROR_ERRNO errno
-# endif
-# ifdef SHARED
-# define SYSCALL_ERROR_HANDLER \
- .section .gnu.linkonce.t.__sparc_get_pic_l7,"ax",@progbits; \
- .globl __sparc_get_pic_l7; \
- .hidden __sparc_get_pic_l7; \
- .type __sparc_get_pic_l7,@function; \
-__sparc_get_pic_l7: \
- retl; \
- add %o7, %l7, %l7; \
- .previous; \
-SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler) \
- save %sp,-96,%sp; \
- sethi %tie_hi22(SYSCALL_ERROR_ERRNO), %l1; \
- sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7; \
- call __sparc_get_pic_l7; \
- add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7; \
- add %l1, %tie_lo10(SYSCALL_ERROR_ERRNO), %l1; \
- ld [%l7 + %l1], %l1, %tie_ld(SYSCALL_ERROR_ERRNO); \
- st %i0, [%g7 + %l1], %tie_add(SYSCALL_ERROR_ERRNO); \
- jmpl %i7+8, %g0; \
- restore %g0, -1, %o0; \
- .previous;
-# else
-# define SYSCALL_ERROR_HANDLER \
-SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler) \
- sethi %tie_hi22(SYSCALL_ERROR_ERRNO), %g1; \
- sethi %hi(_GLOBAL_OFFSET_TABLE_), %g2; \
- add %g1, %tie_lo10(SYSCALL_ERROR_ERRNO), %g1; \
- add %g2, %lo(_GLOBAL_OFFSET_TABLE_), %g2; \
- ld [%g2 + %g1], %g1, %tie_ld(SYSCALL_ERROR_ERRNO); \
- st %o0, [%g7 + %g1], %tie_add(SYSCALL_ERROR_ERRNO); \
- jmpl %o7+8, %g0; \
- mov -1, %o0; \
- .previous;
-# endif
-#else
-# define SYSCALL_ERROR_HANDLER \
-SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler) \
- .global __errno_location; \
- .type __errno_location,@function; \
- save %sp, -96, %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 0x10; \
- bcs __syscall_error_handler; \
- nop; \
- SYSCALL_ERROR_HANDLER
-
-#define PSEUDO_NOERRNO(name, syscall_name, args) \
- .text; \
- ENTRY(name); \
- LOADSYSCALL(syscall_name); \
- ta 0x10
-
-#define PSEUDO_ERRVAL(name, syscall_name, args) \
- .text; \
- ENTRY(name); \
- LOADSYSCALL(syscall_name); \
- ta 0x10
+ /* 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 0x10; \
+ bcc 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 0x10;
+
+#define PSEUDO_ERRVAL(name, syscall_name, args) \
+ .text; \
+ENTRY(name); \
+ LOADSYSCALL(syscall_name); \
+ ta 0x10;
+
+#define PSEUDO_END(name) \
+ END(name)
#else /* __ASSEMBLER__ */
@@ -214,4 +137,24 @@ SYSCALL_ERROR_HANDLER_ENTRY(__syscall_error_handler) \
#endif /* __ASSEMBLER__ */
+/* 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) \
+ ld [%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/sparc/sysdep.h */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 05:40:08 +0000