-/* Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
+/* Copyright (C) 1992-2016 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
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. */
-
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
/* Alan Modra <amodra@bigpond.net.au> rewrote the INLINE_SYSCALL macro */
#ifndef _LINUX_POWERPC_SYSDEP_H
#define _LINUX_POWERPC_SYSDEP_H 1
+#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/powerpc/sysdep.h>
+#include <tls.h>
/* Define __set_errno() for INLINE_SYSCALL macro below. */
#ifndef __ASSEMBLER__
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
+#define SYS_ify(syscall_name) __NR_##syscall_name
#ifdef __ASSEMBLER__
/* This seems to always be the case on PPC. */
-#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 ALIGNARG(log2) log2
+# define ASM_SIZE_DIRECTIVE(name) .size name,.-name
-#endif /* __ASSEMBLER__ */
+#endif /* __ASSEMBLER__ */
-#undef INLINE_SYSCALL
-#if 1
-#define INLINE_SYSCALL(name, nr, args...) \
- ({ \
- DECLARGS_##nr; \
- long ret, err; \
- LOADARGS_##nr(name, args); \
- __asm __volatile ("sc\n\t" \
- "mfcr %1\n\t" \
- : "=r" (r3), "=r" (err) \
- : ASM_INPUT_##nr \
- : "cc", "memory"); \
- ret = r3; \
- if (err & 1 << 28) \
- { \
- __set_errno (ret); \
- ret = -1L; \
- } \
- ret; \
+/* This version is for internal uses when there is no desire
+ to set errno */
+#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, type, nr, args...) \
+ ({ \
+ type sc_ret = ENOSYS; \
+ \
+ __typeof (__vdso_##name) vdsop = __vdso_##name; \
+ PTR_DEMANGLE (vdsop); \
+ if (vdsop != NULL) \
+ sc_ret = \
+ INTERNAL_VSYSCALL_CALL_TYPE (vdsop, err, type, nr, ##args); \
+ else \
+ err = 1 << 28; \
+ sc_ret; \
})
-#define DECLARGS_0 register long r0 __asm__ ("r0"); \
- register long r3 __asm__ ("r3")
-#define DECLARGS_1 DECLARGS_0
-#define DECLARGS_2 DECLARGS_1; register long r4 __asm__ ("r4")
-#define DECLARGS_3 DECLARGS_2; register long r5 __asm__ ("r5")
-#define DECLARGS_4 DECLARGS_3; register long r6 __asm__ ("r6")
-#define DECLARGS_5 DECLARGS_4; register long r7 __asm__ ("r7")
-#define DECLARGS_6 DECLARGS_5; register long r8 __asm__ ("r8")
-
-#define LOADARGS_0(name) \
- r0 = __NR_##name
-#define LOADARGS_1(name, arg1) \
- LOADARGS_0(name); \
- r3 = (long) (arg1)
-#define LOADARGS_2(name, arg1, arg2) \
- LOADARGS_1(name, arg1); \
- r4 = (long) (arg2)
-#define LOADARGS_3(name, arg1, arg2, arg3) \
- LOADARGS_2(name, arg1, arg2); \
- r5 = (long) (arg3)
-#define LOADARGS_4(name, arg1, arg2, arg3, arg4) \
- LOADARGS_3(name, arg1, arg2, arg3); \
- r6 = (long) (arg4)
-#define LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5) \
- LOADARGS_4(name, arg1, arg2, arg3, arg4); \
- r7 = (long) (arg5)
-#define LOADARGS_6(name, arg1, arg2, arg3, arg4, arg5, arg6) \
- LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5); \
- r8 = (long) (arg6)
-
-#define ASM_INPUT_0 "r" (r0)
-#define ASM_INPUT_1 ASM_INPUT_0, "0" (r3)
-#define ASM_INPUT_2 ASM_INPUT_1, "r" (r4)
-#define ASM_INPUT_3 ASM_INPUT_2, "r" (r5)
-#define ASM_INPUT_4 ASM_INPUT_3, "r" (r6)
-#define ASM_INPUT_5 ASM_INPUT_4, "r" (r7)
-#define ASM_INPUT_6 ASM_INPUT_5, "r" (r8)
+/* List of system calls which are supported as vsyscalls. */
+#define HAVE_CLOCK_GETRES_VSYSCALL 1
+#define HAVE_CLOCK_GETTIME_VSYSCALL 1
+#define HAVE_GETCPU_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_CALL_TYPE(funcptr, err, type, 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 type rval __asm__ ("r3"); \
+ 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) \
+ : : "r9", "r10", "r11", "r12", "cr0", "ctr", "lr", "memory"); \
+ err = (long int) r0; \
+ __asm__ __volatile__ ("" : "=r" (rval) : "r" (r3)); \
+ rval; \
+ })
+
+#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
+ INTERNAL_VSYSCALL_CALL_TYPE(funcptr, err, long int, nr, args)
+
+#undef INLINE_SYSCALL
-#else
/* This version is for kernels that implement system calls that
behave like function calls as far as register saving. */
-#define INLINE_SYSCALL(name, nr, args...) \
- ({ \
- register long r0 __asm__ ("r0"); \
- register long r3 __asm__ ("r3"); \
- register long r4 __asm__ ("r4"); \
- register long r5 __asm__ ("r5"); \
- register long r6 __asm__ ("r6"); \
- register long r7 __asm__ ("r7"); \
- register long r8 __asm__ ("r8"); \
- long ret, err; \
- LOADARGS_##nr(name, args); \
- __asm __volatile ("sc\n\t" \
- "mfcr %7\n\t" \
- : "=r" (r0), "=r" (r3), "=r" (r4), \
- "=r" (r5), "=r" (r6), "=r" (r7), \
- "=r" (r8), "=r" (err) \
- : ASM_INPUT_##nr \
- : "r9", "r10", "r11", "r12", \
- "fr0", "fr1", "fr2", "fr3", \
- "fr4", "fr5", "fr6", "fr7", \
- "fr8", "fr9", "fr10", "fr11", \
- "fr12", "fr13", \
- "ctr", "lr", \
- "cr0", "cr1", "cr5", "cr6", "cr7", \
- "memory"); \
- ret = r3; \
- if (err & 1 << 28) \
- { \
- __set_errno (ret); \
- ret = -1L; \
- } \
- ret; \
+#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 LOADARGS_0(name) \
- r0 = __NR_##name
-#define LOADARGS_1(name, arg1) \
- LOADARGS_0(name); \
- r3 = (long) (arg1)
-#define LOADARGS_2(name, arg1, arg2) \
- LOADARGS_1(name, arg1); \
- r4 = (long) (arg2)
-#define LOADARGS_3(name, arg1, arg2, arg3) \
- LOADARGS_2(name, arg1, arg2); \
- r5 = (long) (arg3)
-#define LOADARGS_4(name, arg1, arg2, arg3, arg4) \
- LOADARGS_3(name, arg1, arg2, arg3); \
- r6 = (long) (arg4)
-#define LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5) \
- LOADARGS_4(name, arg1, arg2, arg3, arg4); \
- r7 = (long) (arg5)
-#define LOADARGS_6(name, arg1, arg2, arg3, arg4, arg5, arg6) \
- LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5); \
- r8 = (long) (arg6)
+/* 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. */
+
+#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"); \
+ LOADARGS_##nr (name, ##args); \
+ ABORT_TRANSACTION; \
+ __asm__ __volatile__ \
+ ("sc\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", "memory"); \
+ err = r0; \
+ r3; \
+ })
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, args)
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) long int err __attribute__ ((unused))
+
+#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) > 8) \
+ __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) > 8) \
+ __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) > 8) \
+ __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) > 8) \
+ __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) > 8) \
+ __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) > 8) \
+ __illegally_sized_syscall_arg6 (); \
+ r8 = arg6
#define ASM_INPUT_0 "0" (r0)
#define ASM_INPUT_1 ASM_INPUT_0, "1" (r3)
#define ASM_INPUT_5 ASM_INPUT_4, "5" (r7)
#define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)
+
+/* Pointer mangling support. */
+#if 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 */
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