Change to glibc way of defining syscalls. This should make PPC

compile with gcc 4.0/4.1

1 files changed, 127 insertions, 33 deletions

diff --git a/libc/sysdeps/linux/powerpc/bits/syscalls.h b/libc/sysdeps/linux/powerpc/bits/syscalls.h
index 6168f3906..75001f218 100644
--- a/libc/sysdeps/linux/powerpc/bits/syscalls.h
+++ b/libc/sysdeps/linux/powerpc/bits/syscalls.h
@@ -10,62 +10,156 @@
  * programs.  */
 #include <bits/sysnum.h>
 
+/* 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).  */
 
-#define __STRINGIFY(s) __STRINGIFY2 (s)
-#define __STRINGIFY2(s) #s
-
-#undef JUMPTARGET
-#ifdef __PIC__
-#define __MAKE_SYSCALL	__STRINGIFY(__uClibc_syscall@plt)
-#else
-#define __MAKE_SYSCALL	__STRINGIFY(__uClibc_syscall)
+# undef INLINE_SYSCALL
+#if 0
+# 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;								\
+  })
 #endif
 
-#define unified_syscall_body(name)			\
-	__asm__ (					\
-	".section \".text\"\n\t"			\
-	".align 2\n\t"					\
-	".globl " __STRINGIFY(name) "\n\t"		\
-	".type " __STRINGIFY(name) ",@function\n\t"	\
-	#name":\tli 0," __STRINGIFY(__NR_##name) "\n\t"	\
-	"b " __MAKE_SYSCALL "\n\t"		\
-	".size\t" __STRINGIFY(name) ",.""-" __STRINGIFY(name) "\n"	\
-	)
+# 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))			\
+      {									\
+	sc_ret = __syscall_error(INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err));\
+      }									\
+    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 = (long int)name
+# define LOADARGS_1(name, __arg1) \
+	LOADARGS_0(name, 0); \
+	r3 = (long int)__arg1
+# define LOADARGS_2(name, __arg1, __arg2) \
+	LOADARGS_1(name, __arg1); \
+	r4 = (long int)__arg2
+# define LOADARGS_3(name, __arg1, __arg2, __arg3) \
+	LOADARGS_2(name, __arg1, __arg2); \
+	r5 = (long int)__arg3
+# define LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4) \
+	LOADARGS_3(name, __arg1, __arg2, __arg3); \
+	r6 = (long int)__arg4
+# define LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5) \
+	LOADARGS_4(name, __arg1, __arg2, __arg3, __arg4); \
+	r7 = (long int)__arg5
+# define LOADARGS_6(name, __arg1, __arg2, __arg3, __arg4, __arg5, __arg6) \
+	LOADARGS_5(name, __arg1, __arg2, __arg3, __arg4, __arg5); \
+	r8 = (long int)__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)
 
 #undef _syscall0
-#define _syscall0(type,name)				\
-type name(void);					\
-unified_syscall_body(name)
+#define _syscall0(type,name) \
+type name(void){ \
+  return INLINE_SYSCALL(name, 0); \
+}
 
 #undef _syscall1
 #define _syscall1(type,name,type1,arg1) \
-type name(type1 arg1);  \
-unified_syscall_body(name)
+type name(type1 arg1){  \
+  return INLINE_SYSCALL(name, 1, arg1); \
+}
 
 #undef _syscall2
 #define _syscall2(type,name,type1,arg1,type2,arg2) \
-type name(type1 arg1, type2 arg2);      \
-unified_syscall_body(name)
+type name(type1 arg1, type2 arg2){      \
+  return INLINE_SYSCALL(name, 2, arg1, arg2); \
+}
 
 #undef _syscall3
 #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
-type name(type1 arg1, type2 arg2, type3 arg3);  \
-unified_syscall_body(name)
+type name(type1 arg1, type2 arg2, type3 arg3){  \
+  return INLINE_SYSCALL(name, 3, arg1, arg2, arg3); \
+}
 
 #undef _syscall4
 #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
-type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4);      \
-unified_syscall_body(name)
+type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4){      \
+  return INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4); \
+}
 
 #undef _syscall5
 #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
-type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5);  \
-unified_syscall_body(name)
+type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5){  \
+  return INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5); \
+}
 
 #undef _syscall6
 #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5,type6,arg6) \
-type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6);      \
-unified_syscall_body(name)
+type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6){      \
+  return INLINE_SYSCALL(name, 6, arg1, arg2, arg3, arg4, arg5, arg6); \
+}
 
 #endif /* _BITS_SYSCALLS_H */