diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 97de9fb5c9..17ed7f8d6b 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -112,6 +112,9 @@ #include <linux/if_alg.h> #include <linux/rtc.h> #include <sound/asound.h> +#ifdef HAVE_DRM_H +#include <libdrm/drm.h> +#endif #include "linux_loop.h" #include "uname.h" @@ -5276,6 +5279,101 @@ static abi_long do_ioctl_tiocgptpeer(const IOCTLEntry *ie, uint8_t *buf_temp, } #endif +#ifdef HAVE_DRM_H + +static void unlock_drm_version(struct drm_version *host_ver, + struct target_drm_version *target_ver, + bool copy) +{ + unlock_user(host_ver->name, target_ver->name, + copy ? host_ver->name_len : 0); + unlock_user(host_ver->date, target_ver->date, + copy ? host_ver->date_len : 0); + unlock_user(host_ver->desc, target_ver->desc, + copy ? host_ver->desc_len : 0); +} + +static inline abi_long target_to_host_drmversion(struct drm_version *host_ver, + struct target_drm_version *target_ver) +{ + memset(host_ver, 0, sizeof(*host_ver)); + + __get_user(host_ver->name_len, &target_ver->name_len); + if (host_ver->name_len) { + host_ver->name = lock_user(VERIFY_WRITE, target_ver->name, + target_ver->name_len, 0); + if (!host_ver->name) { + return -EFAULT; + } + } + + __get_user(host_ver->date_len, &target_ver->date_len); + if (host_ver->date_len) { + host_ver->date = lock_user(VERIFY_WRITE, target_ver->date, + target_ver->date_len, 0); + if (!host_ver->date) { + goto err; + } + } + + __get_user(host_ver->desc_len, &target_ver->desc_len); + if (host_ver->desc_len) { + host_ver->desc = lock_user(VERIFY_WRITE, target_ver->desc, + target_ver->desc_len, 0); + if (!host_ver->desc) { + goto err; + } + } + + return 0; +err: + unlock_drm_version(host_ver, target_ver, false); + return -EFAULT; +} + +static inline void host_to_target_drmversion( + struct target_drm_version *target_ver, + struct drm_version *host_ver) +{ + __put_user(host_ver->version_major, &target_ver->version_major); + __put_user(host_ver->version_minor, &target_ver->version_minor); + __put_user(host_ver->version_patchlevel, &target_ver->version_patchlevel); + __put_user(host_ver->name_len, &target_ver->name_len); + __put_user(host_ver->date_len, &target_ver->date_len); + __put_user(host_ver->desc_len, &target_ver->desc_len); + unlock_drm_version(host_ver, target_ver, true); +} + +static abi_long do_ioctl_drm(const IOCTLEntry *ie, uint8_t *buf_temp, + int fd, int cmd, abi_long arg) +{ + struct drm_version *ver; + struct target_drm_version *target_ver; + abi_long ret; + + switch (ie->host_cmd) { + case DRM_IOCTL_VERSION: + if (!lock_user_struct(VERIFY_WRITE, target_ver, arg, 0)) { + return -TARGET_EFAULT; + } + ver = (struct drm_version *)buf_temp; + ret = target_to_host_drmversion(ver, target_ver); + if (!is_error(ret)) { + ret = get_errno(safe_ioctl(fd, ie->host_cmd, ver)); + if (is_error(ret)) { + unlock_drm_version(ver, target_ver, false); + } else { + host_to_target_drmversion(target_ver, ver); + } + } + unlock_user_struct(target_ver, arg, 0); + return ret; + } + return -TARGET_ENOSYS; +} + +#endif + static IOCTLEntry ioctl_entries[] = { #define IOCTL(cmd, access, ...) \ { TARGET_ ## cmd, cmd, #cmd, access, 0, { __VA_ARGS__ } }, |