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target-alpha: Implement rs/rc properly.

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This is a per-cpu flag; there's no need for a spinlock of any kind.

We were also failing to manipulate the flag with $31 as a target reg
and failing to clear the flag on execution of a return-from-interrupt
instruction.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2010-04-12 16:14:54 -07:00 • committed by Aurelien Jarno
parent dc96be4b97
commit ac316ca4b7
4 changed files with 23 additions and 33 deletions
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7
linux-user/main.c
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@ -2358,6 +2358,11 @@ void cpu_loop (CPUState *env)
while (1) {
trapnr = cpu_alpha_exec (env);
/* All of the traps imply a transition through PALcode, which
implies an REI instruction has been executed. Which means
that the intr_flag should be cleared. */
env->intr_flag = 0;
switch (trapnr) {
case EXCP_RESET:
fprintf(stderr, "Reset requested. Exit\n");
@ -2444,7 +2449,7 @@ void cpu_loop (CPUState *env)
env->ir[IR_A0], env->ir[IR_A1],
env->ir[IR_A2], env->ir[IR_A3],
env->ir[IR_A4], env->ir[IR_A5]);
if (trapnr != TARGET_NR_sigreturn
if (trapnr != TARGET_NR_sigreturn
&& trapnr != TARGET_NR_rt_sigreturn) {
env->ir[IR_V0] = (sysret < 0 ? -sysret : sysret);
env->ir[IR_A3] = (sysret < 0);