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authorKhem Raj <kraj@mvista.com>2007-03-06 08:06:26 (GMT)
committerKhem Raj <kraj@mvista.com>2007-03-06 08:06:26 (GMT)
commit80422cdc59d10642577d4d8ddcdf7e88256e8faf (patch)
tree427184e1f818b9a40f137371d6259fa97abab560
parentd81e53c5fa66c5accc0d436e58c36fd62f7fee0c (diff)
Add posix_fadvise posix_fadvise64 for arm.
Import INTERNAL_SYSCALL macro for i386 from glibc. Use above macro in posix_fadvise implementation if an arch defines it.
-rw-r--r--libc/sysdeps/linux/arm/Makefile.arch3
-rw-r--r--libc/sysdeps/linux/common/posix_fadvise.c16
-rw-r--r--libc/sysdeps/linux/common/posix_fadvise64.c17
-rw-r--r--libc/sysdeps/linux/i386/bits/syscalls.h42
4 files changed, 62 insertions, 16 deletions
diff --git a/libc/sysdeps/linux/arm/Makefile.arch b/libc/sysdeps/linux/arm/Makefile.arch
index c599a22..a3b6fc4 100644
--- a/libc/sysdeps/linux/arm/Makefile.arch
+++ b/libc/sysdeps/linux/arm/Makefile.arch
@@ -5,7 +5,8 @@
# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
#
-CSRC := brk.c ioperm.c iopl.c mmap.c sigaction.c __syscall_error.c
+CSRC := brk.c ioperm.c iopl.c mmap.c posix_fadvise.c posix_fadvise64.c \
+ sigaction.c __syscall_error.c
SSRC := \
__longjmp.S vfork.S clone.S setjmp.S bsd-setjmp.S \
diff --git a/libc/sysdeps/linux/common/posix_fadvise.c b/libc/sysdeps/linux/common/posix_fadvise.c
index 47cf66a..3bd689f 100644
--- a/libc/sysdeps/linux/common/posix_fadvise.c
+++ b/libc/sysdeps/linux/common/posix_fadvise.c
@@ -19,9 +19,25 @@
#ifdef __NR_fadvise64
#define __NR_posix_fadvise __NR_fadvise64
+/* get rid of following conditional when
+ all supported arches are having INTERNAL_SYSCALL defined
+*/
+#ifdef INTERNAL_SYSCALL
+int posix_fadvise(int fd, off_t offset, off_t len, int advice)
+{
+ INTERNAL_SYSCALL_DECL(err);
+ int ret = (int) (INTERNAL_SYSCALL(posix_fadvise, err, 5, fd,
+ __LONG_LONG_PAIR (offset >> 31, offset), len, advice));
+ if (INTERNAL_SYSCALL_ERROR_P (ret, err))
+ return INTERNAL_SYSCALL_ERRNO (ret, err);
+ return 0;
+}
+#else
_syscall4(int, posix_fadvise, int, fd, off_t, offset,
off_t, len, int, advice);
+#endif
+
#if defined __UCLIBC_HAS_LFS__ && (!defined __NR_fadvise64_64 || !defined _syscall6)
extern __typeof(posix_fadvise) posix_fadvise64;
strong_alias(posix_fadvise,posix_fadvise64)
diff --git a/libc/sysdeps/linux/common/posix_fadvise64.c b/libc/sysdeps/linux/common/posix_fadvise64.c
index d931aff..31ed5ef 100644
--- a/libc/sysdeps/linux/common/posix_fadvise64.c
+++ b/libc/sysdeps/linux/common/posix_fadvise64.c
@@ -24,8 +24,25 @@
#if __WORDSIZE == 64
#define __NR_posix_fadvise64 __NR_fadvise64_64
+
+#ifdef INTERNAL_SYSCALL
+int posix_fadvise64(int fd, __off64_t offset, __off64_t len, int advice)
+{
+ if (len != (off_t) len)
+ return EOVERFLOW;
+ INTERNAL_SYSCALL_DECL (err);
+ int ret = INTERNAL_SYSCALL (posix_fadvise64, err, 6, fd,
+ __LONG_LONG_PAIR ((long) (offset >> 32),
+ (long) offset),
+ (off_t) len, advise);
+ if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
+ return 0;
+ return INTERNAL_SYSCALL_ERRNO (ret, err);
+}
+#else
_syscall4(int, posix_fadvise64, int, fd, __off64_t, offset,
__off64_t, len, int, advice);
+#endif
/* 32 bit implementation is kind of a pita */
#elif __WORDSIZE == 32
diff --git a/libc/sysdeps/linux/i386/bits/syscalls.h b/libc/sysdeps/linux/i386/bits/syscalls.h
index d612071..eb77ea8 100644
--- a/libc/sysdeps/linux/i386/bits/syscalls.h
+++ b/libc/sysdeps/linux/i386/bits/syscalls.h
@@ -15,6 +15,13 @@
#define SYS_ify(syscall_name) (__NR_##syscall_name)
+#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
+
+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
+ ((unsigned int) (val) >= 0xfffff001u)
+
+#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
+
/* We need some help from the assembler to generate optimal code. We
define some macros here which later will be used. */
@@ -145,24 +152,29 @@ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5, type6 arg6) \
{ \
return (type) (INLINE_SYSCALL(name, 6, arg1, arg2, arg3, arg4, arg5, arg6)); \
}
-
#define INLINE_SYSCALL(name, nr, args...) \
- ({ \
- unsigned int resultvar; \
- __asm__ __volatile__ ( \
- LOADARGS_##nr \
- "movl %1, %%eax\n\t" \
- "int $0x80\n\t" \
- RESTOREARGS_##nr \
- : "=a" (resultvar) \
- : "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \
- if (resultvar >= 0xfffff001) \
- { \
- __set_errno (-resultvar); \
- resultvar = 0xffffffff; \
- } \
+ ({ \
+ unsigned int result = INTERNAL_SYSCALL (name, , nr, args); \
+ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, ), 0)) \
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (result, )); \
+ result = 0xffffffff; \
+ } \
+ (int) result; })
+
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ ({ \
+ unsigned int resultvar; \
+ __asm__ __volatile__ ( \
+ LOADARGS_##nr \
+ "movl %1, %%eax\n\t" \
+ "int $0x80\n\t" \
+ RESTOREARGS_##nr \
+ : "=a" (resultvar) \
+ : "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \
(int) resultvar; })
+
#define LOADARGS_0
#define LOADARGS_1 \
"bpushl .L__X'%k2, %k2\n\t" \