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bsd-user: Implement rename and renameat 

Plus the helper LOCK_PATH2 and UNLOCK_PATH2 macros.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Jung-uk Kim <jkim@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Warner Losh 2022-06-12 08:16:46 -06:00
parent 390f547ea8
commit ab5fd2d969
2 changed files with 53 additions and 0 deletions
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45
bsd-user/bsd-file.h
View File

@ -32,6 +32,24 @@ do { \
#define UNLOCK_PATH(p, arg) unlock_user(p, arg, 0)
#define LOCK_PATH2(p1, arg1, p2, arg2) \
do { \
(p1) = lock_user_string(arg1); \
if ((p1) == NULL) { \
return -TARGET_EFAULT; \
} \
(p2) = lock_user_string(arg2); \
if ((p2) == NULL) { \
unlock_user(p1, arg1, 0); \
return -TARGET_EFAULT; \
} \
} while (0)
#define UNLOCK_PATH2(p1, arg1, p2, arg2) \
do { \
unlock_user(p2, arg2, 0); \
unlock_user(p1, arg1, 0); \
} while (0)
extern struct iovec *lock_iovec(int type, abi_ulong target_addr, int count,
int copy);
@ -330,4 +348,31 @@ static abi_long do_bsd_fchdir(abi_long arg1)
return get_errno(fchdir(arg1));
}
/* rename(2) */
static abi_long do_bsd_rename(abi_long arg1, abi_long arg2)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH2(p1, arg1, p2, arg2);
ret = get_errno(rename(p1, p2)); /* XXX path(p1), path(p2) */
UNLOCK_PATH2(p1, arg1, p2, arg2);
return ret;
}
/* renameat(2) */
static abi_long do_bsd_renameat(abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4)
{
abi_long ret;
void *p1, *p2;
LOCK_PATH2(p1, arg2, p2, arg4);
ret = get_errno(renameat(arg1, p1, arg3, p2));
UNLOCK_PATH2(p1, arg2, p2, arg4);
return ret;
}
#endif /* BSD_FILE_H */

8
bsd-user/freebsd/os-syscall.c
View File

@ -309,6 +309,14 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
ret = do_bsd_fchdir(arg1);
break;
case TARGET_FREEBSD_NR_rename: /* rename(2) */
ret = do_bsd_rename(arg1, arg2);
break;
case TARGET_FREEBSD_NR_renameat: /* renameat(2) */
ret = do_bsd_renameat(arg1, arg2, arg3, arg4);
break;
default:
qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
ret = -TARGET_ENOSYS;