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| author | Richard Henderson <rth@twiddle.net> | 2012-06-07 14:47:41 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2012-08-04 09:37:49 -0700 |
| commit | 0e141977e690ee6cd06e5a842eae0be291297efa (patch) | |
| tree | 913c137679b20ad5b8bda0aa8bbdaf4a95e6c47a /linux-user | |
| parent | e7ea6cbefdddd63851d3e9b7bc1f82c2c2985756 (diff) | |
| download | qemu-0e141977e690ee6cd06e5a842eae0be291297efa.zip qemu-0e141977e690ee6cd06e5a842eae0be291297efa.tar.gz qemu-0e141977e690ee6cd06e5a842eae0be291297efa.tar.bz2 | |
alpha-linux-user: Fix a3 error return with v0 error bypass.
We were failing to initialize a3 for syscalls that bypass the
negative return value error check.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/main.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index a21942c..53714de 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -2846,13 +2846,11 @@ void cpu_loop(CPUAlphaState *env) break; } /* Syscall writes 0 to V0 to bypass error check, similar - to how this is handled internal to Linux kernel. */ - if (env->ir[IR_V0] == 0) { - env->ir[IR_V0] = sysret; - } else { - env->ir[IR_V0] = (sysret < 0 ? -sysret : sysret); - env->ir[IR_A3] = (sysret < 0); - } + to how this is handled internal to Linux kernel. + (Ab)use trapnr temporarily as boolean indicating error. */ + trapnr = (env->ir[IR_V0] != 0 && sysret < 0); + env->ir[IR_V0] = (trapnr ? -sysret : sysret); + env->ir[IR_A3] = trapnr; break; case 0x86: /* IMB */ |