* 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 */
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