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selftests/powerpc: Add ptrace tests for VSX, VMX registers
This patch adds ptrace interface test for VSX, VMX registers. This also adds ptrace interface based helper functions related to VSX, VMX registers access. This also adds some assembly helper functions related to VSX and VMX registers. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Anshuman Khandual
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Michael Ellerman
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Nov 17, 2016
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -4,3 +4,4 @@ ptrace-tm-spd-gpr | |
| ptrace-tar | ||
| ptrace-tm-tar | ||
| ptrace-tm-spd-tar | ||
| ptrace-vsx | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,117 @@ | ||
| /* | ||
| * Ptrace test for VMX/VSX registers | ||
| * | ||
| * Copyright (C) 2015 Anshuman Khandual, IBM Corporation. | ||
| * | ||
| * This program is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU General Public License | ||
| * as published by the Free Software Foundation; either version | ||
| * 2 of the License, or (at your option) any later version. | ||
| */ | ||
| #include "ptrace.h" | ||
| #include "ptrace-vsx.h" | ||
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| /* Tracer and Tracee Shared Data */ | ||
| int shm_id; | ||
| int *cptr, *pptr; | ||
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| unsigned long fp_load[VEC_MAX]; | ||
| unsigned long fp_load_new[VEC_MAX]; | ||
| unsigned long fp_store[VEC_MAX]; | ||
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| void vsx(void) | ||
| { | ||
| int ret; | ||
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| cptr = (int *)shmat(shm_id, NULL, 0); | ||
| loadvsx(fp_load, 0); | ||
| cptr[1] = 1; | ||
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| while (!cptr[0]) | ||
| asm volatile("" : : : "memory"); | ||
| shmdt((void *) cptr); | ||
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| storevsx(fp_store, 0); | ||
| ret = compare_vsx_vmx(fp_store, fp_load_new); | ||
| if (ret) | ||
| exit(1); | ||
| exit(0); | ||
| } | ||
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| int trace_vsx(pid_t child) | ||
| { | ||
| unsigned long vsx[VSX_MAX]; | ||
| unsigned long vmx[VMX_MAX + 2][2]; | ||
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| FAIL_IF(start_trace(child)); | ||
| FAIL_IF(show_vsx(child, vsx)); | ||
| FAIL_IF(validate_vsx(vsx, fp_load)); | ||
| FAIL_IF(show_vmx(child, vmx)); | ||
| FAIL_IF(validate_vmx(vmx, fp_load)); | ||
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| memset(vsx, 0, sizeof(vsx)); | ||
| memset(vmx, 0, sizeof(vmx)); | ||
| load_vsx_vmx(fp_load_new, vsx, vmx); | ||
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| FAIL_IF(write_vsx(child, vsx)); | ||
| FAIL_IF(write_vmx(child, vmx)); | ||
| FAIL_IF(stop_trace(child)); | ||
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| return TEST_PASS; | ||
| } | ||
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| int ptrace_vsx(void) | ||
| { | ||
| pid_t pid; | ||
| int ret, status, i; | ||
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| shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT); | ||
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| for (i = 0; i < VEC_MAX; i++) | ||
| fp_load[i] = i + rand(); | ||
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| for (i = 0; i < VEC_MAX; i++) | ||
| fp_load_new[i] = i + 2 * rand(); | ||
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| pid = fork(); | ||
| if (pid < 0) { | ||
| perror("fork() failed"); | ||
| return TEST_FAIL; | ||
| } | ||
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| if (pid == 0) | ||
| vsx(); | ||
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| if (pid) { | ||
| pptr = (int *)shmat(shm_id, NULL, 0); | ||
| while (!pptr[1]) | ||
| asm volatile("" : : : "memory"); | ||
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| ret = trace_vsx(pid); | ||
| if (ret) { | ||
| kill(pid, SIGTERM); | ||
| shmdt((void *)pptr); | ||
| shmctl(shm_id, IPC_RMID, NULL); | ||
| return TEST_FAIL; | ||
| } | ||
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| pptr[0] = 1; | ||
| shmdt((void *)pptr); | ||
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| ret = wait(&status); | ||
| shmctl(shm_id, IPC_RMID, NULL); | ||
| if (ret != pid) { | ||
| printf("Child's exit status not captured\n"); | ||
| return TEST_FAIL; | ||
| } | ||
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| return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL : | ||
| TEST_PASS; | ||
| } | ||
| return TEST_PASS; | ||
| } | ||
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| int main(int argc, char *argv[]) | ||
| { | ||
| return test_harness(ptrace_vsx, "ptrace_vsx"); | ||
| } |
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