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| // SPDX-License-Identifier: GPL-2.0
|
| /*
| * Copyright 2015, Laurent Dufour, IBM Corp.
| *
| * Test the kernel's signal returning code to check reclaim is done if the
| * sigreturn() is called while in a transaction (suspended since active is
| * already dropped trough the system call path).
| *
| * The kernel must discard the transaction when entering sigreturn, since
| * restoring the potential TM SPRS from the signal frame is requiring to not be
| * in a transaction.
| */
|
| #include <signal.h>
| #include <stdio.h>
| #include <stdlib.h>
| #include <string.h>
| #include <sys/types.h>
| #include <sys/wait.h>
| #include <unistd.h>
|
| #include "tm.h"
| #include "utils.h"
|
|
| void handler(int sig)
| {
| uint64_t ret;
|
| asm __volatile__(
| "li 3,1 ;"
| "tbegin. ;"
| "beq 1f ;"
| "li 3,0 ;"
| "tsuspend. ;"
| "1: ;"
| "std%X[ret] 3, %[ret] ;"
| : [ret] "=m"(ret)
| :
| : "memory", "3", "cr0");
|
| if (ret)
| exit(1);
|
| /*
| * We return from the signal handle while in a suspended transaction
| */
| }
|
|
| int tm_sigreturn(void)
| {
| struct sigaction sa;
| uint64_t ret = 0;
|
| SKIP_IF(!have_htm());
| SKIP_IF(!is_ppc64le());
|
| memset(&sa, 0, sizeof(sa));
| sa.sa_handler = handler;
| sigemptyset(&sa.sa_mask);
|
| if (sigaction(SIGSEGV, &sa, NULL))
| exit(1);
|
| asm __volatile__(
| "tbegin. ;"
| "beq 1f ;"
| "li 3,0 ;"
| "std 3,0(3) ;" /* trigger SEGV */
| "li 3,1 ;"
| "std%X[ret] 3,%[ret] ;"
| "tend. ;"
| "b 2f ;"
| "1: ;"
| "li 3,2 ;"
| "std%X[ret] 3,%[ret] ;"
| "2: ;"
| : [ret] "=m"(ret)
| :
| : "memory", "3", "cr0");
|
| if (ret != 2)
| exit(1);
|
| exit(0);
| }
|
| int main(void)
| {
| return test_harness(tm_sigreturn, "tm_sigreturn");
| }
|
|
