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linux-user: add getrandom() syscall 

getrandom() has been introduced in kernel 3.17 and is now used during
the boot sequence of Debian unstable (stretch/sid).

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Laurent Vivier 2016-02-21 10:56:23 +01:00 committed by Riku Voipio
parent 93a92d3bd6
commit f894efd199
1 changed files with 13 additions and 0 deletions
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13
linux-user/syscall.c
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@ -249,6 +249,9 @@ _syscall2(int, ioprio_get, int, which, int, who)
#if defined(TARGET_NR_ioprio_set) && defined(__NR_ioprio_set)
_syscall3(int, ioprio_set, int, which, int, who, int, ioprio)
#endif
#if defined(TARGET_NR_getrandom) && defined(__NR_getrandom)
_syscall3(int, getrandom, void *, buf, size_t, buflen, unsigned int, flags)
#endif
static bitmask_transtbl fcntl_flags_tbl[] = {
{ TARGET_O_ACCMODE, TARGET_O_WRONLY, O_ACCMODE, O_WRONLY, },
@ -7541,6 +7544,16 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
ret = get_errno(shutdown(arg1, arg2));
break;
#endif
#if defined(TARGET_NR_getrandom) && defined(__NR_getrandom)
case TARGET_NR_getrandom:
p = lock_user(VERIFY_WRITE, arg1, arg2, 0);
if (!p) {
goto efault;
}
ret = get_errno(getrandom(p, arg2, arg3));
unlock_user(p, arg1, ret);
break;
#endif
#ifdef TARGET_NR_socket
case TARGET_NR_socket:
ret = do_socket(arg1, arg2, arg3);