lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-08-01 10:06:57 +03:00
Code Activity

2.5-18.1

Browse Source
This commit is contained in:
Jakub Jelinek
2007-07-12 18:26:36 +00:00
parent 7d58530341
commit 0ecb606cb6
6215 changed files with 494638 additions and 305010 deletions
Download Patch File Download Diff File Expand all files Collapse all files

150
sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
View File

@ -1,5 +1,5 @@
/* Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
Free Software Foundation, Inc.
/* Copyright (C) 1992,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006
Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -23,6 +23,7 @@
#define _LINUX_POWERPC_SYSDEP_H 1
#include <sysdeps/unix/powerpc/sysdep.h>
#include <tls.h>
/* Define __set_errno() for INLINE_SYSCALL macro below. */
#ifndef __ASSEMBLER__
@ -61,12 +62,118 @@
#ifdef __ASSEMBLER__
/* This seems to always be the case on PPC. */
#define ALIGNARG(log2) log2
# define ALIGNARG(log2) log2
/* For ELF we need the `.type' directive to make shared libs work right. */
#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
# define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
# define ASM_SIZE_DIRECTIVE(name) .size name,.-name
#endif /* __ASSEMBLER__ */
#endif /* __ASSEMBLER__ */
/* This version is for kernels that implement system calls that
behave like function calls as far as register saving.
It falls back to the syscall in the case that the vDSO doesn't
exist or fails for ENOSYS */
#ifdef SHARED
# define INLINE_VSYSCALL(name, nr, args...) \
({ \
__label__ out; \
__label__ iserr; \
INTERNAL_SYSCALL_DECL (sc_err); \
long int sc_ret; \
\
if (__vdso_##name != NULL) \
{ \
sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
goto out; \
if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
goto iserr; \
} \
\
sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
{ \
iserr: \
__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
sc_ret = -1L; \
} \
out: \
sc_ret; \
})
#else
# define INLINE_VSYSCALL(name, nr, args...) \
INLINE_SYSCALL (name, nr, ##args)
#endif
#ifdef SHARED
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
({ \
__label__ out; \
long int v_ret; \
\
if (__vdso_##name != NULL) \
{ \
v_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
goto out; \
} \
v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
out: \
v_ret; \
})
#else
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
#endif
/* This version is for internal uses when there is no desire
to set errno */
#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...) \
({ \
long int sc_ret = ENOSYS; \
\
if (__vdso_##name != NULL) \
sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
else \
err = 1 << 28; \
sc_ret; \
})
/* List of system calls which are supported as vsyscalls. */
#define HAVE_CLOCK_GETRES_VSYSCALL 1
#define HAVE_CLOCK_GETTIME_VSYSCALL 1
/* Define a macro which expands inline into the wrapper code for a system
call. This use is for internal calls that do not need to handle errors
normally. It will never touch errno. This returns just what the kernel
gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set)
the negation of the return value in the kernel gets reverted. */
#define INTERNAL_VSYSCALL_NCS(funcptr, err, nr, args...) \
({ \
register void *r0 __asm__ ("r0"); \
register long int r3 __asm__ ("r3"); \
register long int r4 __asm__ ("r4"); \
register long int r5 __asm__ ("r5"); \
register long int r6 __asm__ ("r6"); \
register long int r7 __asm__ ("r7"); \
register long int r8 __asm__ ("r8"); \
LOADARGS_##nr (funcptr, args); \
__asm__ __volatile__ \
("mtctr %0\n\t" \
"bctrl\n\t" \
"mfcr %0\n\t" \
"0:" \
: "=&r" (r0), \
"=&r" (r3), "=&r" (r4), "=&r" (r5), \
"=&r" (r6), "=&r" (r7), "=&r" (r8) \
: ASM_INPUT_##nr \
: "r9", "r10", "r11", "r12", \
"cr0", "ctr", "lr", "memory"); \
err = (long int) r0; \
(int) r3; \
})
#undef INLINE_SYSCALL
@ -100,7 +207,7 @@
register long int r6 __asm__ ("r6"); \
register long int r7 __asm__ ("r7"); \
register long int r8 __asm__ ("r8"); \
LOADARGS_##nr(name, args); \
LOADARGS_##nr (name, ##args); \
__asm__ __volatile__ \
("sc\n\t" \
"mfcr %0\n\t" \
@ -115,14 +222,14 @@
(int) r3; \
})
#define INTERNAL_SYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, args)
#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) long int err
#undef INTERNAL_SYSCALL_ERROR_P
#define INTERNAL_SYSCALL_ERROR_P(val, err) \
(__builtin_expect (err & (1 << 28), 0))
((void) (val), __builtin_expect ((err) & (1 << 28), 0))
#undef INTERNAL_SYSCALL_ERRNO
#define INTERNAL_SYSCALL_ERRNO(val, err) (val)
@ -180,4 +287,29 @@
#define ASM_INPUT_5 ASM_INPUT_4, "5" (r7)
#define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)
/* 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(reg, tmpreg) \
ld tmpreg,POINTER_GUARD(r13); \
xor reg,tmpreg,reg
# define PTR_MANGLE2(reg, tmpreg) \
xor reg,tmpreg,reg
# define PTR_MANGLE3(destreg, reg, tmpreg) \
ld tmpreg,POINTER_GUARD(r13); \
xor destreg,tmpreg,reg
# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, 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/powerpc/powerpc64/sysdep.h */