diff options
| author | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-09-17 22:04:29 +0000 |
|---|---|---|
| committer | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-09-17 22:04:29 +0000 |
| commit | d74e3b124889c808c3b21516f9a646588b884f28 (patch) | |
| tree | 4c29c89b3cfcef47a849cf06a06a4e33cee6d322 | |
| parent | 8109b9b6bf934a39e73c90fb804e2d5af02391d1 (diff) | |
[PATCH] alpha: fix linux syscall convention
According to linux kernel sources, register a3 is set in case of failure
(and cleared in case of success) while register v0 contains the result
(or -errno in case of error).
The convention was not followed which results in weird behaviour.
Signed-off-by: Tristan Gingold <gingold@adacore.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5243 c046a42c-6fe2-441c-8c8c-71466251a162
| -rw-r--r-- | hw/alpha_palcode.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/hw/alpha_palcode.c b/hw/alpha_palcode.c index fe14c1082b..38466dbd8f 100644 --- a/hw/alpha_palcode.c +++ b/hw/alpha_palcode.c @@ -1071,11 +1071,12 @@ void call_pal (CPUState *env, int palcode) ret = do_syscall(env, env->ir[IR_V0], env->ir[IR_A0], env->ir[IR_A1], env->ir[IR_A2], env->ir[IR_A3], env->ir[IR_A4], env->ir[IR_A5]); - env->ir[IR_A3] = ret; - if (ret > (target_ulong)(-515)) { - env->ir[IR_V0] = 1; + if (ret >= 0) { + env->ir[IR_A3] = 0; + env->ir[IR_V0] = ret; } else { - env->ir[IR_V0] = 0; + env->ir[IR_A3] = 1; + env->ir[IR_V0] = -ret; } break; case 0x9E: |