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microblaze: Pass a ucontext * as 3rd sighandler arg 

There is disagreement between microblaze glibc and the kernel
to what the third arg of signal handlers should point to.

Change QEMU linux-user to match the kernel port. glibc patches
are pending.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
This commit is contained in:
Edgar E. Iglesias 2010-07-23 09:30:37 +02:00 committed by Edgar E. Iglesias
parent 24ab68ac72
commit b2178704e4
1 changed files with 20 additions and 6 deletions
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26
linux-user/signal.c
View File

@ -3064,9 +3064,23 @@ struct target_sigcontext {
uint32_t oldmask;
};
struct target_stack_t {
abi_ulong ss_sp;
int ss_flags;
unsigned int ss_size;
};
struct target_ucontext {
abi_ulong uc_flags;
abi_ulong uc_link;
struct target_stack_t uc_stack;
struct target_sigcontext sc;
uint32_t extramask[TARGET_NSIG_WORDS - 1];
};
/* Signal frames. */
struct target_signal_frame {
struct target_sigcontext sc;
struct target_ucontext uc;
uint32_t extramask[TARGET_NSIG_WORDS - 1];
uint32_t tramp[2];
};
@ -3175,7 +3189,7 @@ static void setup_frame(int sig, struct target_sigaction *ka,
goto badframe;
/* Save the mask. */
err |= __put_user(set->sig[0], &frame->sc.oldmask);
err |= __put_user(set->sig[0], &frame->uc.sc.oldmask);
if (err)
goto badframe;
@ -3184,7 +3198,7 @@ static void setup_frame(int sig, struct target_sigaction *ka,
goto badframe;
}
setup_sigcontext(&frame->sc, env);
setup_sigcontext(&frame->uc.sc, env);
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
@ -3214,7 +3228,7 @@ static void setup_frame(int sig, struct target_sigaction *ka,
/* Signal handler args: */
env->regs[5] = sig; /* Arg 0: signum */
env->regs[6] = 0;
env->regs[7] = (unsigned long) &frame->sc; /* arg 1: sigcontext */
env->regs[7] = (unsigned long) &frame->uc; /* arg 1: sigcontext */
/* Offset of 4 to handle microblaze rtid r14, 0 */
env->sregs[SR_PC] = (unsigned long)ka->_sa_handler;
@ -3247,7 +3261,7 @@ long do_sigreturn(CPUState *env)
goto badframe;
/* Restore blocked signals */
if (__get_user(target_set.sig[0], &frame->sc.oldmask))
if (__get_user(target_set.sig[0], &frame->uc.sc.oldmask))
goto badframe;
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
@ -3256,7 +3270,7 @@ long do_sigreturn(CPUState *env)
target_to_host_sigset_internal(&set, &target_set);
sigprocmask(SIG_SETMASK, &set, NULL);
restore_sigcontext(&frame->sc, env);
restore_sigcontext(&frame->uc.sc, env);
/* We got here through a sigreturn syscall, our path back is via an
rtb insn so setup r14 for that. */
env->regs[14] = env->sregs[SR_PC];