93 lines
1.7 KiB
C
93 lines
1.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2015, Cyril Bur, IBM Corp.
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*
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* This test attempts to see if the VMX registers change across a syscall (fork).
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*/
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#include <altivec.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <sys/time.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "utils.h"
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vector int varray[] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10,11,12},
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{13,14,15,16},{17,18,19,20},{21,22,23,24},
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{25,26,27,28},{29,30,31,32},{33,34,35,36},
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{37,38,39,40},{41,42,43,44},{45,46,47,48}};
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extern int test_vmx(vector int *varray, pid_t *pid);
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int vmx_syscall(void)
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{
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pid_t fork_pid;
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int i;
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int ret;
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int child_ret;
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for (i = 0; i < 1000; i++) {
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/* test_vmx will fork() */
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ret = test_vmx(varray, &fork_pid);
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if (fork_pid == -1)
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return -1;
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if (fork_pid == 0)
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exit(ret);
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waitpid(fork_pid, &child_ret, 0);
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if (ret || child_ret)
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return 1;
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}
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return 0;
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}
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int test_vmx_syscall(void)
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{
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/*
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* Setup an environment with much context switching
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*/
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pid_t pid2;
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pid_t pid;
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int ret;
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int child_ret;
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// vcmpequd used in vmx_asm.S is v2.07
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SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07));
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pid = fork();
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FAIL_IF(pid == -1);
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pid2 = fork();
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ret = vmx_syscall();
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/* Can't FAIL_IF(pid2 == -1); because we've already forked */
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if (pid2 == -1) {
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/*
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* Couldn't fork, ensure child_ret is set and is a fail
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*/
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ret = child_ret = 1;
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} else {
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if (pid2)
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waitpid(pid2, &child_ret, 0);
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else
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exit(ret);
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}
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ret |= child_ret;
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if (pid)
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waitpid(pid, &child_ret, 0);
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else
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exit(ret);
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FAIL_IF(ret || child_ret);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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return test_harness(test_vmx_syscall, "vmx_syscall");
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}
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