diff options
| -rw-r--r-- | linux-user/syscall.c | 58 |
1 files changed, 46 insertions, 12 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 40e8742..df70255 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -5099,6 +5099,40 @@ static inline int tswapid(int id) #endif /* USE_UID16 */ +/* We must do direct syscalls for setting UID/GID, because we want to + * implement the Linux system call semantics of "change only for this thread", + * not the libc/POSIX semantics of "change for all threads in process". + * (See http://ewontfix.com/17/ for more details.) + * We use the 32-bit version of the syscalls if present; if it is not + * then either the host architecture supports 32-bit UIDs natively with + * the standard syscall, or the 16-bit UID is the best we can do. + */ +#ifdef __NR_setuid32 +#define __NR_sys_setuid __NR_setuid32 +#else +#define __NR_sys_setuid __NR_setuid +#endif +#ifdef __NR_setgid32 +#define __NR_sys_setgid __NR_setgid32 +#else +#define __NR_sys_setgid __NR_setgid +#endif +#ifdef __NR_setresuid32 +#define __NR_sys_setresuid __NR_setresuid32 +#else +#define __NR_sys_setresuid __NR_setresuid +#endif +#ifdef __NR_setresgid32 +#define __NR_sys_setresgid __NR_setresgid32 +#else +#define __NR_sys_setresgid __NR_setresgid +#endif + +_syscall1(int, sys_setuid, uid_t, uid) +_syscall1(int, sys_setgid, gid_t, gid) +_syscall3(int, sys_setresuid, uid_t, ruid, uid_t, euid, uid_t, suid) +_syscall3(int, sys_setresgid, gid_t, rgid, gid_t, egid, gid_t, sgid) + void syscall_init(void) { IOCTLEntry *ie; @@ -8834,9 +8868,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif #ifdef TARGET_NR_setresuid case TARGET_NR_setresuid: - ret = get_errno(setresuid(low2highuid(arg1), - low2highuid(arg2), - low2highuid(arg3))); + ret = get_errno(sys_setresuid(low2highuid(arg1), + low2highuid(arg2), + low2highuid(arg3))); break; #endif #ifdef TARGET_NR_getresuid @@ -8855,9 +8889,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif #ifdef TARGET_NR_getresgid case TARGET_NR_setresgid: - ret = get_errno(setresgid(low2highgid(arg1), - low2highgid(arg2), - low2highgid(arg3))); + ret = get_errno(sys_setresgid(low2highgid(arg1), + low2highgid(arg2), + low2highgid(arg3))); break; #endif #ifdef TARGET_NR_getresgid @@ -8883,10 +8917,10 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, break; #endif case TARGET_NR_setuid: - ret = get_errno(setuid(low2highuid(arg1))); + ret = get_errno(sys_setuid(low2highuid(arg1))); break; case TARGET_NR_setgid: - ret = get_errno(setgid(low2highgid(arg1))); + ret = get_errno(sys_setgid(low2highgid(arg1))); break; case TARGET_NR_setfsuid: ret = get_errno(setfsuid(arg1)); @@ -9168,7 +9202,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif #ifdef TARGET_NR_setresuid32 case TARGET_NR_setresuid32: - ret = get_errno(setresuid(arg1, arg2, arg3)); + ret = get_errno(sys_setresuid(arg1, arg2, arg3)); break; #endif #ifdef TARGET_NR_getresuid32 @@ -9187,7 +9221,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif #ifdef TARGET_NR_setresgid32 case TARGET_NR_setresgid32: - ret = get_errno(setresgid(arg1, arg2, arg3)); + ret = get_errno(sys_setresgid(arg1, arg2, arg3)); break; #endif #ifdef TARGET_NR_getresgid32 @@ -9214,12 +9248,12 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif #ifdef TARGET_NR_setuid32 case TARGET_NR_setuid32: - ret = get_errno(setuid(arg1)); + ret = get_errno(sys_setuid(arg1)); break; #endif #ifdef TARGET_NR_setgid32 case TARGET_NR_setgid32: - ret = get_errno(setgid(arg1)); + ret = get_errno(sys_setgid(arg1)); break; #endif #ifdef TARGET_NR_setfsuid32 |