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authorJoakim Tjernlund <joakim.tjernlund@transmode.se>2007-02-12 21:57:57 +0000
committerJoakim Tjernlund <joakim.tjernlund@transmode.se>2007-02-12 21:57:57 +0000
commitdcf241189ab7eb060aeb06caad8b14aa964f6736 (patch)
tree735c06c0036aed160a35e9c0e2870e87fe5730e5 /libc/sysdeps/linux/powerpc/bits/sysdep.h
parent216bfd092c46dc0479e571a37fd2fd96e47605b5 (diff)
Rehash the PowerPC e500 port to avoid creating symlinks
in the powerpc arch code and make more code common with classic PowerPC. From Steve Papacharalambous Lets hope I didn't break something.
Diffstat (limited to 'libc/sysdeps/linux/powerpc/bits/sysdep.h')
-rw-r--r--libc/sysdeps/linux/powerpc/bits/sysdep.h301
1 files changed, 301 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/powerpc/bits/sysdep.h b/libc/sysdeps/linux/powerpc/bits/sysdep.h
new file mode 100644
index 000000000..c42efbabd
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/bits/sysdep.h
@@ -0,0 +1,301 @@
+/* Copyright (C) 1992,1997-2003,2004,2005,2006 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _LINUX_POWERPC_SYSDEP_H
+#define _LINUX_POWERPC_SYSDEP_H 1
+
+#include <sysdeps/unix/powerpc/sysdep.h>
+#include <tls.h>
+
+/* Some systen calls got renamed over time, but retained the same semantics.
+ Handle them here so they can be catched by both C and assembler stubs in
+ glibc. */
+
+#ifdef __NR_pread64
+# ifdef __NR_pread
+# error "__NR_pread and __NR_pread64 both defined???"
+# endif
+# define __NR_pread __NR_pread64
+#endif
+
+#ifdef __NR_pwrite64
+# ifdef __NR_pwrite
+# error "__NR_pwrite and __NR_pwrite64 both defined???"
+# endif
+# define __NR_pwrite __NR_pwrite64
+#endif
+
+/* For Linux we can use the system call table in the header file
+ /usr/include/asm/unistd.h
+ of the kernel. But these symbols do not follow the SYS_* syntax
+ so we have to redefine the `SYS_ify' macro here. */
+#undef SYS_ify
+#ifdef __STDC__
+# define SYS_ify(syscall_name) __NR_##syscall_name
+#else
+# define SYS_ify(syscall_name) __NR_/**/syscall_name
+#endif
+
+#ifndef __ASSEMBLER__
+
+# include <errno.h>
+
+# 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
+
+# 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 VDSO
+ call. This use is for internal calls that do not need to handle errors
+ normally. It will never touch errno.
+ On powerpc a system call basically clobbers the same registers like a
+ function call, with the exception of LR (which is needed for the
+ "sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
+ an error return status). */
+# 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"); \
+ register long int r9 __asm__ ("r9"); \
+ register long int r10 __asm__ ("r10"); \
+ register long int r11 __asm__ ("r11"); \
+ register long int r12 __asm__ ("r12"); \
+ LOADARGS_##nr (funcptr, args); \
+ __asm__ __volatile__ \
+ ("mtctr %0\n\t" \
+ "bctrl\n\t" \
+ "mfcr %0" \
+ : "=&r" (r0), \
+ "=&r" (r3), "=&r" (r4), "=&r" (r5), "=&r" (r6), "=&r" (r7), \
+ "=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12) \
+ : ASM_INPUT_##nr \
+ : "cr0", "ctr", "lr", "memory"); \
+ err = (long int) r0; \
+ (int) r3; \
+ })
+
+# undef INLINE_SYSCALL
+# define INLINE_SYSCALL(name, nr, args...) \
+ ({ \
+ INTERNAL_SYSCALL_DECL (sc_err); \
+ long int sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, args); \
+ if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
+ sc_ret = -1L; \
+ } \
+ sc_ret; \
+ })
+
+/* 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.
+ On powerpc a system call basically clobbers the same registers like a
+ function call, with the exception of LR (which is needed for the
+ "sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
+ an error return status). */
+
+# undef INTERNAL_SYSCALL_DECL
+# define INTERNAL_SYSCALL_DECL(err) long int err
+
+# undef INTERNAL_SYSCALL
+# define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+ ({ \
+ register long int 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"); \
+ register long int r9 __asm__ ("r9"); \
+ register long int r10 __asm__ ("r10"); \
+ register long int r11 __asm__ ("r11"); \
+ register long int r12 __asm__ ("r12"); \
+ LOADARGS_##nr(name, args); \
+ __asm__ __volatile__ \
+ ("sc \n\t" \
+ "mfcr %0" \
+ : "=&r" (r0), \
+ "=&r" (r3), "=&r" (r4), "=&r" (r5), "=&r" (r6), "=&r" (r7), \
+ "=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12) \
+ : ASM_INPUT_##nr \
+ : "cr0", "ctr", "memory"); \
+ err = r0; \
+ (int) r3; \
+ })
+# define INTERNAL_SYSCALL(name, err, nr, args...) \
+ INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
+
+# undef INTERNAL_SYSCALL_ERROR_P
+# define INTERNAL_SYSCALL_ERROR_P(val, err) \
+ ((void) (val), __builtin_expect ((err) & (1 << 28), 0))
+
+# undef INTERNAL_SYSCALL_ERRNO
+# define INTERNAL_SYSCALL_ERRNO(val, err) (val)
+
+# define LOADARGS_0(name, dummy) \
+ r0 = name
+# define LOADARGS_1(name, __arg1) \
+ long int arg1 = (long int) (__arg1); \
+ LOADARGS_0(name, 0); \
+ extern void __illegally_sized_syscall_arg1 (void); \
+ if (__builtin_classify_type (__arg1) != 5 && sizeof (__arg1) > 4) \
+ __illegally_sized_syscall_arg1 (); \
+ r3 = arg1
+# define LOADARGS_2(name, __arg1, __arg2) \
+ long int arg2 = (long int) (__arg2); \
+ LOADARGS_1(name, __arg1); \
+ extern void __illegally_sized_syscall_arg2 (void); \
+ if (__builtin_classify_type (__arg2) != 5 && sizeof (__arg2) > 4) \
+ __illegally_sized_syscall_arg2 (); \
+ r4 = arg2
+# define LOADARGS_3(name, __arg1, __arg2, __arg3) \
+ long int arg3 = (long int) (__arg3); \
+ LOADARGS_2(name, __arg1, __arg2); \
+ extern void __illegally_sized_syscall_arg3 (void); \
+ if (__builtin_classify_type (__arg3) != 5 && sizeof (__arg3) > 4) \
+ __illegally_sized_syscall_arg3 (); \
+ r5 = arg3
+# define LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4) \
+ long int arg4 = (long int) (__arg4); \
+ LOADARGS_3(name, __arg1, __arg2, __arg3); \
+ extern void __illegally_sized_syscall_arg4 (void); \
+ if (__builtin_classify_type (__arg4) != 5 && sizeof (__arg4) > 4) \
+ __illegally_sized_syscall_arg4 (); \
+ r6 = arg4
+# define LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5) \
+ long int arg5 = (long int) (__arg5); \
+ LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4); \
+ extern void __illegally_sized_syscall_arg5 (void); \
+ if (__builtin_classify_type (__arg5) != 5 && sizeof (__arg5) > 4) \
+ __illegally_sized_syscall_arg5 (); \
+ r7 = arg5
+# define LOADARGS_6(name, __arg1, __arg2, __arg3, __arg4, __arg5, __arg6) \
+ long int arg6 = (long int) (__arg6); \
+ LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5); \
+ extern void __illegally_sized_syscall_arg6 (void); \
+ if (__builtin_classify_type (__arg6) != 5 && sizeof (__arg6) > 4) \
+ __illegally_sized_syscall_arg6 (); \
+ r8 = arg6
+
+# define ASM_INPUT_0 "0" (r0)
+# define ASM_INPUT_1 ASM_INPUT_0, "1" (r3)
+# define ASM_INPUT_2 ASM_INPUT_1, "2" (r4)
+# define ASM_INPUT_3 ASM_INPUT_2, "3" (r5)
+# define ASM_INPUT_4 ASM_INPUT_3, "4" (r6)
+# define ASM_INPUT_5 ASM_INPUT_4, "5" (r7)
+# define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)
+
+#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(reg, tmpreg) \
+ lwz tmpreg,POINTER_GUARD(r2); \
+ xor reg,tmpreg,reg
+# define PTR_MANGLE2(reg, tmpreg) \
+ xor reg,tmpreg,reg
+# define PTR_MANGLE3(destreg, reg, tmpreg) \
+ lwz tmpreg,POINTER_GUARD(r2); \
+ 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/powerpc32/sysdep.h */