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-rw-r--r--libc/sysdeps/linux/common/posix_fadvise.c14
-rw-r--r--libc/sysdeps/linux/common/posix_fadvise64.c36
-rw-r--r--libc/sysdeps/linux/sh/bits/syscalls.h145
3 files changed, 187 insertions, 8 deletions
diff --git a/libc/sysdeps/linux/common/posix_fadvise.c b/libc/sysdeps/linux/common/posix_fadvise.c
index 45734f9b2..95aa4d27b 100644
--- a/libc/sysdeps/linux/common/posix_fadvise.c
+++ b/libc/sysdeps/linux/common/posix_fadvise.c
@@ -33,8 +33,18 @@ int posix_fadvise(int fd, off_t offset, off_t len, int advice)
return 0;
}
#else
-_syscall4(int, posix_fadvise, int, fd, off_t, offset,
- off_t, len, int, advice);
+static __inline__ int syscall_posix_fadvise(int fd, off_t offset1, off_t offset2, off_t len, int advice);
+#define __NR_syscall_posix_fadvise __NR_fadvise64
+_syscall5(int, syscall_posix_fadvise, int, fd, off_t, offset1,
+ off_t, offset2, off_t, len, int, advice);
+
+int posix_fadvise(int fd, off_t offset, off_t len, int advice)
+{
+ int ret = syscall_posix_fadvise(fd, __LONG_LONG_PAIR (offset >> 31, offset), len, advice);
+ if (ret == -1)
+ return errno;
+ return ret;
+}
#endif
diff --git a/libc/sysdeps/linux/common/posix_fadvise64.c b/libc/sysdeps/linux/common/posix_fadvise64.c
index 5d8ed65b6..03e25ed93 100644
--- a/libc/sysdeps/linux/common/posix_fadvise64.c
+++ b/libc/sysdeps/linux/common/posix_fadvise64.c
@@ -40,14 +40,35 @@ int posix_fadvise64(int fd, __off64_t offset, __off64_t len, int advice)
return INTERNAL_SYSCALL_ERRNO (ret, err);
}
#else
-_syscall4(int, posix_fadvise64, int, fd, __off64_t, offset,
+static __inline__ int syscall_posix_fadvise(int fd, off_t offset1, off_t offset2, off_t len, int advice);
+#define __NR_syscall_posix_fadvise64 __NR_posix_fadvise64
+_syscall4(int, syscall_posix_fadvise64, int, fd, __off64_t, offset,
__off64_t, len, int, advice);
+int posix_fadvise64(int fd, __off64_t offset, __off64_t len, int advice)
+{
+ int ret = syscall_posix_fadvise64(fd, offset, len, advice);
+ if (ret == -1)
+ return errno;
+ return ret;
+}
#endif
/* 32 bit implementation is kind of a pita */
#elif __WORDSIZE == 32
-#ifdef _syscall6 /* workaround until everyone has _syscall6() */
+#ifdef INTERNAL_SYSCALL
+int posix_fadvise64(int fd, __off64_t offset, __off64_t len, int advice)
+{
+ INTERNAL_SYSCALL_DECL (err);
+ int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd,
+ __LONG_LONG_PAIR(offset >> 32, offset & 0xffffffff),
+ __LONG_LONG_PAIR(len >> 32, len & 0xffffffff),
+ advice);
+ if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
+ return 0;
+ return INTERNAL_SYSCALL_ERRNO (ret, err);
+}
+#elif defined _syscall6 /* workaround until everyone has _syscall6() */
#define __NR___syscall_fadvise64_64 __NR_fadvise64_64
static __inline__ _syscall6(int, __syscall_fadvise64_64, int, fd,
unsigned long, high_offset, unsigned long, low_offset,
@@ -55,14 +76,17 @@ static __inline__ _syscall6(int, __syscall_fadvise64_64, int, fd,
int, advice);
int posix_fadvise64(int fd, __off64_t offset, __off64_t len, int advice)
{
- return (__syscall_fadvise64_64(fd,
+ int ret = __syscall_fadvise64_64(fd,
__LONG_LONG_PAIR(offset >> 32, offset & 0xffffffff),
__LONG_LONG_PAIR(len >> 32, len & 0xffffffff),
- advice));
+ advice);
+ if (ret == -1)
+ return errno;
+ return ret;
}
#else
-#warning _syscall6 has not been defined for your machine :(
-#endif /* _syscall6 */
+#warning neither INTERNAL_SYSCALL nor _syscall6 has been defined for your machine :(
+#endif /* INTERNAL_SYSCALL */
#else
#error your machine is neither 32 bit or 64 bit ... it must be magical
diff --git a/libc/sysdeps/linux/sh/bits/syscalls.h b/libc/sysdeps/linux/sh/bits/syscalls.h
index 234f80653..e0ab65b82 100644
--- a/libc/sysdeps/linux/sh/bits/syscalls.h
+++ b/libc/sysdeps/linux/sh/bits/syscalls.h
@@ -140,6 +140,151 @@ __asm__ __volatile__ ("trapa %1" \
__syscall_return(type,__sc0); \
}
+#define SYSCALL_INST_STR0 "trapa #0x10\n\t"
+#define SYSCALL_INST_STR1 "trapa #0x11\n\t"
+#define SYSCALL_INST_STR2 "trapa #0x12\n\t"
+#define SYSCALL_INST_STR3 "trapa #0x13\n\t"
+#define SYSCALL_INST_STR4 "trapa #0x14\n\t"
+#define SYSCALL_INST_STR5 "trapa #0x15\n\t"
+#define SYSCALL_INST_STR6 "trapa #0x16\n\t"
+
+# ifdef NEED_SYSCALL_INST_PAD
+# define SYSCALL_INST_PAD "\
+ or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0"
+# else
+# define SYSCALL_INST_PAD
+# endif
+
+#define ASMFMT_0
+#define ASMFMT_1 \
+ , "r" (r4)
+#define ASMFMT_2 \
+ , "r" (r4), "r" (r5)
+#define ASMFMT_3 \
+ , "r" (r4), "r" (r5), "r" (r6)
+#define ASMFMT_4 \
+ , "r" (r4), "r" (r5), "r" (r6), "r" (r7)
+#define ASMFMT_5 \
+ , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0)
+#define ASMFMT_6 \
+ , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1)
+#define ASMFMT_7 \
+ , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1), "r" (r2)
+
+#define SUBSTITUTE_ARGS_0()
+#define SUBSTITUTE_ARGS_1(arg1) \
+ long int _arg1 = (long int) (arg1); \
+ register long int r4 __asm__ ("%r4") = (long int) (_arg1)
+#define SUBSTITUTE_ARGS_2(arg1, arg2) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ register long int r4 __asm__ ("%r4") = (long int) (_arg1); \
+ register long int r5 __asm__ ("%r5") = (long int) (_arg2)
+#define SUBSTITUTE_ARGS_3(arg1, arg2, arg3) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ register long int r4 __asm__ ("%r4") = (long int) (_arg1); \
+ register long int r5 __asm__ ("%r5") = (long int) (_arg2); \
+ register long int r6 __asm__ ("%r6") = (long int) (_arg3)
+#define SUBSTITUTE_ARGS_4(arg1, arg2, arg3, arg4) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ long int _arg4 = (long int) (arg4); \
+ register long int r4 __asm__ ("%r4") = (long int) (_arg1); \
+ register long int r5 __asm__ ("%r5") = (long int) (_arg2); \
+ register long int r6 __asm__ ("%r6") = (long int) (_arg3); \
+ register long int r7 __asm__ ("%r7") = (long int) (_arg4)
+#define SUBSTITUTE_ARGS_5(arg1, arg2, arg3, arg4, arg5) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ long int _arg4 = (long int) (arg4); \
+ long int _arg5 = (long int) (arg5); \
+ register long int r4 __asm__ ("%r4") = (long int) (_arg1); \
+ register long int r5 __asm__ ("%r5") = (long int) (_arg2); \
+ register long int r6 __asm__ ("%r6") = (long int) (_arg3); \
+ register long int r7 __asm__ ("%r7") = (long int) (_arg4); \
+ register long int r0 __asm__ ("%r0") = (long int) (_arg5)
+#define SUBSTITUTE_ARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ long int _arg4 = (long int) (arg4); \
+ long int _arg5 = (long int) (arg5); \
+ long int _arg6 = (long int) (arg6); \
+ register long int r4 __asm__ ("%r4") = (long int)(_arg1); \
+ register long int r5 __asm__ ("%r5") = (long int) (_arg2); \
+ register long int r6 __asm__ ("%r6") = (long int) (_arg3); \
+ register long int r7 __asm__ ("%r7") = (long int) (_arg4); \
+ register long int r0 __asm__ ("%r0") = (long int) (_arg5); \
+ register long int r1 __asm__ ("%r1") = (long int) (_arg6)
+#define SUBSTITUTE_ARGS_7(arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
+ long int _arg1 = (long int) (arg1); \
+ long int _arg2 = (long int) (arg2); \
+ long int _arg3 = (long int) (arg3); \
+ long int _arg4 = (long int) (arg4); \
+ long int _arg5 = (long int) (arg5); \
+ long int _arg6 = (long int) (arg6); \
+ long int _arg7 = (long int) (arg7); \
+ register long int r4 __asm__ ("%r4") = (long int) (_arg1); \
+ register long int r5 __asm__ ("%r5") = (long int) (_arg2); \
+ register long int r6 __asm__ ("%r6") = (long int) (_arg3); \
+ register long int r7 __asm__ ("%r7") = (long int) (_arg4); \
+ register long int r0 __asm__ ("%r0") = (long int) (_arg5); \
+ register long int r1 __asm__ ("%r1") = (long int) (_arg6); \
+ register long int r2 __asm__ ("%r2") = (long int) (_arg7)
+
+#undef INLINE_SYSCALL
+#define INLINE_SYSCALL(name, nr, args...) \
+ ({ \
+ unsigned int __resultvar = INTERNAL_SYSCALL (name, , nr, args); \
+ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (__resultvar, ), 0)) \
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (__resultvar, )); \
+ __resultvar = 0xffffffff; \
+ } \
+ (int) __resultvar; })
+
+#undef INTERNAL_SYSCALL
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ ({ \
+ unsigned long int resultvar; \
+ register long int r3 __asm__ ("%r3") = SYS_ify (name); \
+ SUBSTITUTE_ARGS_##nr(args); \
+ \
+ __asm__ volatile (SYSCALL_INST_STR##nr SYSCALL_INST_PAD \
+ : "=z" (resultvar) \
+ : "r" (r3) ASMFMT_##nr \
+ : "memory"); \
+ \
+ (int) resultvar; })
+
+/* The _NCS variant allows non-constant syscall numbers. */
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+ ({ \
+ unsigned long int resultvar; \
+ register long int r3 __asm__ ("%r3") = (name); \
+ SUBSTITUTE_ARGS_##nr(args); \
+ \
+ __asm__ volatile (SYSCALL_INST_STR##nr SYSCALL_INST_PAD \
+ : "=z" (resultvar) \
+ : "r" (r3) ASMFMT_##nr \
+ : "memory"); \
+ \
+ (int) resultvar; })
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
+ ((unsigned int) (val) >= 0xfffff001u)
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
+
#endif /* __ASSEMBLER__ */
#endif /* _BITS_SYSCALLS_H */
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-25 08:54:41 +0000