diff options
| author | Ed Swierk <eswierk@skyportsystems.com> | 2014-12-16 12:55:31 -0800 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2015-01-27 22:33:57 +0200 |
| commit | 9c6bf9c7d71d7da18a024182b69569969449d6f9 (patch) | |
| tree | 328fb981bf2a6730b5630f530b5bde0f8745eb8e /linux-user/syscall.c | |
| parent | 95018018caeea209f58695645fd1d50a9d0ba6df (diff) | |
linux-user: Fix ioctl cmd type mismatch on 64-bit targets
linux-user passes the cmd argument of the ioctl syscall as a signed long,
but compares it to an unsigned int when iterating through the ioctl_entries
list. When the cmd is a large value like 0x80047476 (TARGET_TIOCSWINSZ on
mips64) it gets sign-extended to 0xffffffff80047476, causing the comparison
to fail and resulting in lots of spurious "Unsupported ioctl" errors.
Changing the target_cmd field in the ioctl_entries list to a signed int
causes those values to be sign-extended as well during the comparison.
Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 5658b66499..683f8ccef5 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -3278,7 +3278,7 @@ typedef abi_long do_ioctl_fn(const IOCTLEntry *ie, uint8_t *buf_temp, int fd, abi_long cmd, abi_long arg); struct IOCTLEntry { - unsigned int target_cmd; + int target_cmd; unsigned int host_cmd; const char *name; int access; |