If argument passing to register case (ex. -mregparam=3). This case set all parameters set to register from caller. But callee refer to stack. So can't get parameter.

Signed-off-by: Yoshinori Sato ysato@users.sourceforge.jp --- include/fcntl.h | 4 ++-- libc/sysdeps/linux/common/open.c | 4 ++-- libc/sysdeps/linux/common/openat.c | 15 ++++++++++++++- 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/include/fcntl.h b/include/fcntl.h index adcd7ef..683f976 100644 --- a/include/fcntl.h +++ b/include/fcntl.h @@ -108,8 +108,8 @@ libc_hidden_proto(fcntl64) extern int open (const char *__file, int __oflag, ...) __nonnull ((1)); libc_hidden_proto(open) # ifdef _LIBC -extern int __open2_nocancel(const char *, int) __nonnull ((1)) attribute_hidden; -extern int __open_nocancel(const char *, int, mode_t) __nonnull ((1)) attribute_hidden; +extern int __open2_nocancel(const char *, int, ...) __nonnull ((1)) attribute_hidden; +extern int __open_nocancel(const char *, int, ...) __nonnull ((1)) attribute_hidden; # endif #else # ifdef __REDIRECT diff --git a/libc/sysdeps/linux/common/open.c b/libc/sysdeps/linux/common/open.c index aab0fb5..909201a 100644 --- a/libc/sysdeps/linux/common/open.c +++ b/libc/sysdeps/linux/common/open.c @@ -21,8 +21,8 @@ strong_alias_untyped(__syscall_open,__NC(open)) # define __NR___open2_nocancel __NR_open _syscall2(int, __NC(open2), const char *, file, int, flags) #else -int __open2_nocancel(const char *, int) __nonnull ((1)) attribute_hidden; -int __open_nocancel(const char *, int, mode_t) __nonnull ((1)) attribute_hidden; +int __open2_nocancel(const char *, int, ...) __nonnull ((1)) attribute_hidden; +int __open_nocancel(const char *, int, ...) __nonnull ((1)) attribute_hidden; #endif

int open(const char *file, int oflag, ...) diff --git a/libc/sysdeps/linux/common/openat.c b/libc/sysdeps/linux/common/openat.c index f6032da..f71567c 100644 --- a/libc/sysdeps/linux/common/openat.c +++ b/libc/sysdeps/linux/common/openat.c @@ -8,11 +8,24 @@

#include <sys/syscall.h> #include <fcntl.h> +#include <stdarg.h>

#ifdef __NR_openat # define __NR___syscall_openat __NR_openat static __inline__ _syscall4(int, __syscall_openat, int, fd, const char *, file, int, oflag, mode_t, mode) -strong_alias_untyped(__syscall_openat,openat) + +int __openat(int fd, const char *file, int o_flag, ...) +{ + va_list ap; + mode_t mode; + + va_start(ap, o_flag); + mode = va_arg(ap, int); + va_end(ap); + return __syscall_openat(fd, file, o_flag, mode); +} + +strong_alias_untyped(__openat,openat) libc_hidden_def(openat) #else /* should add emulation with open() and /proc/self/fd/ ... */