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syscall: fix arguments for preadv()

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It has two arguments "pos_l and "pos_h" instead of one "off". It is used
to handle 64-bit offsets on 32-bit kernels.

SYSCALL_DEFINE5(preadv, unsigned long, fd, const struct iovec __user *, vec,
                unsigned long, vlen, unsigned long, pos_l, unsigned long, pos_h)

https://github.com/checkpoint-restore/criu/issues/424
Signed-off-by: Andrei Vagin <avagin@openvz.org>
Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
This commit is contained in:
Andrei Vagin 2017-12-14 18:30:03 -08:00 • committed by Andrei Vagin
parent 88fbd37f53
commit 03fb0b8223
6 changed files with 21 additions and 5 deletions
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16
compel/plugins/include/uapi/std/syscall-types.h
View file

@ -15,6 +15,8 @@
#include <fcntl.h>
#include <time.h>
#include "common/bitsperlong.h"
struct cap_header {
uint32_t version;
int pid;
@ -53,4 +55,18 @@ typedef int kernel_timer_t;
#include <compel/plugins/std/asm/syscall-types.h>
extern long sys_preadv_raw(int fd, struct iovec *iov, unsigned long nr, unsigned long pos_l, unsigned long pos_h);
static inline long sys_preadv(int fd, struct iovec *iov, unsigned long nr, off_t off)
{
#if BITS_PER_LONG == 64
return sys_preadv_raw(fd, iov, nr, off, 0);
#elif BITS_PER_LONG == 32
return sys_preadv_raw(fd, iov, nr, off, ((uint64_t)off) >> 32);
#else
# error "BITS_PER_LONG isn't defined"
#endif
}
#endif /* COMPEL_SYSCALL_TYPES_H__ */