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linux-user: ioctl() command type is int

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When executing a 64bit target chroot on 64bit host,
the ioctl() command can mismatch.

It seems the previous commit doesn't solve the problem in
my case:

    9c6bf9c7 linux-user: Fix ioctl cmd type mismatch on 64-bit targets

For example, a ppc64 chroot on an x86_64 host:

bash-4.3# ls
Unsupported ioctl: cmd=0x80087467
Unsupported ioctl: cmd=0x802c7415

The origin of the problem is in syscall.c:do_ioctl().

    static abi_long do_ioctl(int fd, abi_long cmd, abi_long arg)

In this case (ppc64) abi_long is long (on the x86_64), and

    cmd = 0x0000000080087467

then
    if (ie->target_cmd == cmd)

target_cmd is int, so target_cmd = 0x80087467
and to compare an int with a long, the sign is extended to 64bit,
so the comparison is:

    if (0xffffffff80087467 == 0x0000000080087467)

which doesn't match whereas it should.

This patch uses int in the case of the target command type
instead of abi_long.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Laurent Vivier 2015-06-16 00:35:28 +02:00 committed by Riku Voipio
parent 1d085f6cae
commit 45c874ebba
1 changed files with 8 additions and 8 deletions
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16
linux-user/syscall.c
View file

@ -3346,7 +3346,7 @@ STRUCT_MAX
typedef struct IOCTLEntry IOCTLEntry;
typedef abi_long do_ioctl_fn(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, abi_long cmd, abi_long arg);
int fd, int cmd, abi_long arg);
struct IOCTLEntry {
int target_cmd;
@ -3372,7 +3372,7 @@ struct IOCTLEntry {
/ sizeof(struct fiemap_extent))
static abi_long do_ioctl_fs_ioc_fiemap(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, abi_long cmd, abi_long arg)
int fd, int cmd, abi_long arg)
{
/* The parameter for this ioctl is a struct fiemap followed
* by an array of struct fiemap_extent whose size is set
@ -3453,7 +3453,7 @@ static abi_long do_ioctl_fs_ioc_fiemap(const IOCTLEntry *ie, uint8_t *buf_temp,
#endif
static abi_long do_ioctl_ifconf(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, abi_long cmd, abi_long arg)
int fd, int cmd, abi_long arg)
{
const argtype *arg_type = ie->arg_type;
int target_size;
@ -3547,7 +3547,7 @@ static abi_long do_ioctl_ifconf(const IOCTLEntry *ie, uint8_t *buf_temp,
}
static abi_long do_ioctl_dm(const IOCTLEntry *ie, uint8_t *buf_temp, int fd,
abi_long cmd, abi_long arg)
int cmd, abi_long arg)
{
void *argptr;
struct dm_ioctl *host_dm;
@ -3772,7 +3772,7 @@ out:
}
static abi_long do_ioctl_blkpg(const IOCTLEntry *ie, uint8_t *buf_temp, int fd,
abi_long cmd, abi_long arg)
int cmd, abi_long arg)
{
void *argptr;
int target_size;
@ -3825,7 +3825,7 @@ out:
}
static abi_long do_ioctl_rt(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, abi_long cmd, abi_long arg)
int fd, int cmd, abi_long arg)
{
const argtype *arg_type = ie->arg_type;
const StructEntry *se;
@ -3888,7 +3888,7 @@ static abi_long do_ioctl_rt(const IOCTLEntry *ie, uint8_t *buf_temp,
}
static abi_long do_ioctl_kdsigaccept(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, abi_long cmd, abi_long arg)
int fd, int cmd, abi_long arg)
{
int sig = target_to_host_signal(arg);
return get_errno(ioctl(fd, ie->host_cmd, sig));
@ -3905,7 +3905,7 @@ static IOCTLEntry ioctl_entries[] = {
/* ??? Implement proper locking for ioctls. */
/* do_ioctl() Must return target values and target errnos. */
static abi_long do_ioctl(int fd, abi_long cmd, abi_long arg)
static abi_long do_ioctl(int fd, int cmd, abi_long arg)
{
const IOCTLEntry *ie;
const argtype *arg_type;