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-rw-r--r--linux-user/signal.c154
1 files changed, 140 insertions, 14 deletions
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 3aa8590..1e5fb20 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -1020,12 +1020,22 @@ struct target_sigcontext {
abi_ulong fault_address;
};
-struct target_ucontext {
+struct target_ucontext_v1 {
+ abi_ulong tuc_flags;
+ abi_ulong tuc_link;
+ target_stack_t tuc_stack;
+ struct target_sigcontext tuc_mcontext;
+ target_sigset_t tuc_sigmask; /* mask last for extensibility */
+};
+
+struct target_ucontext_v2 {
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
struct target_sigcontext tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
+ char __unused[128 - sizeof(sigset_t)];
+ abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
};
struct sigframe
@@ -1035,12 +1045,19 @@ struct sigframe
abi_ulong retcode;
};
-struct rt_sigframe
+struct rt_sigframe_v1
{
abi_ulong pinfo;
abi_ulong puc;
struct target_siginfo info;
- struct target_ucontext uc;
+ struct target_ucontext_v1 uc;
+ abi_ulong retcode;
+};
+
+struct rt_sigframe_v2
+{
+ struct target_siginfo info;
+ struct target_ucontext_v2 uc;
abi_ulong retcode;
};
@@ -1191,11 +1208,11 @@ end:
}
/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
-static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
- target_siginfo_t *info,
- target_sigset_t *set, CPUState *env)
+static void setup_rt_frame_v1(int usig, struct emulated_sigaction *ka,
+ target_siginfo_t *info,
+ target_sigset_t *set, CPUState *env)
{
- struct rt_sigframe *frame;
+ struct rt_sigframe_v1 *frame;
abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
struct target_sigaltstack stack;
int i, err = 0;
@@ -1204,14 +1221,14 @@ static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
return /* 1 */;
- info_addr = frame_addr + offsetof(struct rt_sigframe, info);
+ info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
__put_user_error(info_addr, &frame->pinfo, err);
- uc_addr = frame_addr + offsetof(struct rt_sigframe, uc);
+ uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
__put_user_error(uc_addr, &frame->puc, err);
err |= copy_siginfo_to_user(&frame->info, info);
/* Clear all the bits of the ucontext we don't use. */
- memset(&frame->uc, 0, offsetof(struct target_ucontext, tuc_mcontext));
+ memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
memset(&stack, 0, sizeof(stack));
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
@@ -1228,7 +1245,55 @@ static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
if (err == 0)
err = setup_return(env, ka, &frame->retcode, frame_addr, usig,
- frame_addr + offsetof(struct rt_sigframe, retcode));
+ frame_addr + offsetof(struct rt_sigframe_v1, retcode));
+
+ if (err == 0) {
+ env->regs[1] = info_addr;
+ env->regs[2] = uc_addr;
+ }
+
+end:
+ unlock_user_struct(frame, frame_addr, 1);
+
+ // return err;
+}
+
+static void setup_rt_frame_v2(int usig, struct emulated_sigaction *ka,
+ target_siginfo_t *info,
+ target_sigset_t *set, CPUState *env)
+{
+ struct rt_sigframe_v2 *frame;
+ abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
+ struct target_sigaltstack stack;
+ int i, err = 0;
+ abi_ulong info_addr, uc_addr;
+
+ if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
+ return /* 1 */;
+
+ info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
+ uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
+ err |= copy_siginfo_to_user(&frame->info, info);
+
+ /* Clear all the bits of the ucontext we don't use. */
+ memset(&frame->uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
+
+ memset(&stack, 0, sizeof(stack));
+ __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
+ __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
+ __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
+ memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
+
+ err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
+ env, set->sig[0]);
+ for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
+ goto end;
+ }
+
+ if (err == 0)
+ err = setup_return(env, ka, &frame->retcode, frame_addr, usig,
+ frame_addr + offsetof(struct rt_sigframe_v2, retcode));
if (err == 0) {
/*
@@ -1246,6 +1311,17 @@ end:
// return err;
}
+static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
+ target_siginfo_t *info,
+ target_sigset_t *set, CPUState *env)
+{
+ if (get_osversion() >= 0x020612) {
+ setup_rt_frame_v2(usig, ka, info, set, env);
+ } else {
+ setup_rt_frame_v1(usig, ka, info, set, env);
+ }
+}
+
static int
restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
{
@@ -1325,10 +1401,51 @@ badframe:
return 0;
}
-long do_rt_sigreturn(CPUState *env)
+long do_rt_sigreturn_v1(CPUState *env)
{
abi_ulong frame_addr;
- struct rt_sigframe *frame;
+ struct rt_sigframe_v1 *frame;
+ sigset_t host_set;
+
+ /*
+ * Since we stacked the signal on a 64-bit boundary,
+ * then 'sp' should be word aligned here. If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (env->regs[13] & 7)
+ goto badframe;
+
+ frame_addr = env->regs[13];
+ if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
+ goto badframe;
+
+ target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
+ sigprocmask(SIG_SETMASK, &host_set, NULL);
+
+ if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
+ goto badframe;
+
+ if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
+ goto badframe;
+
+#if 0
+ /* Send SIGTRAP if we're single-stepping */
+ if (ptrace_cancel_bpt(current))
+ send_sig(SIGTRAP, current, 1);
+#endif
+ unlock_user_struct(frame, frame_addr, 0);
+ return env->regs[0];
+
+badframe:
+ unlock_user_struct(frame, frame_addr, 0);
+ force_sig(SIGSEGV /* , current */);
+ return 0;
+}
+
+long do_rt_sigreturn_v2(CPUState *env)
+{
+ abi_ulong frame_addr;
+ struct rt_sigframe_v2 *frame;
sigset_t host_set;
/*
@@ -1349,7 +1466,7 @@ long do_rt_sigreturn(CPUState *env)
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
goto badframe;
- if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
+ if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v2, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
goto badframe;
#if 0
@@ -1366,6 +1483,15 @@ badframe:
return 0;
}
+long do_rt_sigreturn(CPUState *env)
+{
+ if (get_osversion() >= 0x020612) {
+ return do_rt_sigreturn_v2(env);
+ } else {
+ return do_rt_sigreturn_v1(env);
+ }
+}
+
#elif defined(TARGET_SPARC)
#define __SUNOS_MAXWIN 31
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