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linux-user: Use safe_syscall for open and openat system calls 

Restart open() and openat() if signals occur before,
or during with SA_RESTART.

Signed-off-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk>
Message-id: 1441497448-32489-17-git-send-email-T.E.Baldwin99@members.leeds.ac.uk
[PMM: Adjusted to follow new -1-and-set-errno safe_syscall convention]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Timothy E Baldwin 2016-05-12 18:47:48 +01:00 committed by Riku Voipio
parent 50afd02b84
commit c10a07387b
1 changed files with 4 additions and 14 deletions
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18
linux-user/syscall.c
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@ -359,18 +359,6 @@ static int sys_getcwd1(char *buf, size_t size)
return strlen(buf)+1;
}
static int sys_openat(int dirfd, const char *pathname, int flags, mode_t mode)
{
/*
* open(2) has extra parameter 'mode' when called with
* flag O_CREAT.
*/
if ((flags & O_CREAT) != 0) {
return (openat(dirfd, pathname, flags, mode));
}
return (openat(dirfd, pathname, flags));
}
#ifdef TARGET_NR_utimensat
#ifdef CONFIG_UTIMENSAT
static int sys_utimensat(int dirfd, const char *pathname,
@ -709,6 +697,8 @@ static type safe_##name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
safe_syscall3(ssize_t, read, int, fd, void *, buff, size_t, count)
safe_syscall3(ssize_t, write, int, fd, const void *, buff, size_t, count)
safe_syscall4(int, openat, int, dirfd, const char *, pathname, \
int, flags, mode_t, mode)
static inline int host_to_target_sock_type(int host_type)
{
@ -5851,7 +5841,7 @@ static int do_openat(void *cpu_env, int dirfd, const char *pathname, int flags,
if (is_proc_myself(pathname, "exe")) {
int execfd = qemu_getauxval(AT_EXECFD);
return execfd ? execfd : sys_openat(dirfd, exec_path, flags, mode);
return execfd ? execfd : safe_openat(dirfd, exec_path, flags, mode);
}
for (fake_open = fakes; fake_open->filename; fake_open++) {
@ -5887,7 +5877,7 @@ static int do_openat(void *cpu_env, int dirfd, const char *pathname, int flags,
return fd;
}
return sys_openat(dirfd, path(pathname), flags, mode);
return safe_openat(dirfd, path(pathname), flags, mode);
}
#define TIMER_MAGIC 0x0caf0000