diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h | 150 |
1 files changed, 141 insertions, 9 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h index 38a376fa90..aab4b721c0 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h @@ -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 */ |