selftests/powerpc: Add ptrace tests for GPR/FPR registers
This patch adds ptrace interface test for GPR/FPR registers. This adds ptrace interface based helper functions related to GPR/FPR access and some assembly helper functions related to GPR/FPR registers. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> [mpe: Add #defines for the new note types when headers don't define them] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Anshuman Khandual
committed by
Michael Ellerman
Michael Ellerman
parent
15ec3997aa
commit
f666ad413d
1
tools/testing/selftests/powerpc/ptrace/.gitignore
vendored
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1
tools/testing/selftests/powerpc/ptrace/.gitignore
vendored
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@@ -0,0 +1 @@
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ptrace-gpr
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12
tools/testing/selftests/powerpc/ptrace/Makefile
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12
tools/testing/selftests/powerpc/ptrace/Makefile
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@@ -0,0 +1,12 @@
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TEST_PROGS := ptrace-gpr
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include ../../lib.mk
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all: $(TEST_PROGS)
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CFLAGS += -m64 -I../../../../../usr/include
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$(TEST_PROGS): ../harness.c ../utils.c ../lib/reg.S ptrace.h
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clean:
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rm -f $(TEST_PROGS) *.o
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123
tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
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123
tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
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@@ -0,0 +1,123 @@
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/*
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* Ptrace test for GPR/FPR registers
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*
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* Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include "ptrace.h"
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#include "ptrace-gpr.h"
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#include "reg.h"
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/* Tracer and Tracee Shared Data */
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int shm_id;
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int *cptr, *pptr;
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float a = FPR_1;
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float b = FPR_2;
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float c = FPR_3;
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void gpr(void)
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{
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unsigned long gpr_buf[18];
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float fpr_buf[32];
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cptr = (int *)shmat(shm_id, NULL, 0);
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asm __volatile__(
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ASM_LOAD_GPR_IMMED(gpr_1)
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ASM_LOAD_FPR_SINGLE_PRECISION(flt_1)
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:
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: [gpr_1]"i"(GPR_1), [flt_1] "r" (&a)
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: "memory", "r6", "r7", "r8", "r9", "r10",
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"r11", "r12", "r13", "r14", "r15", "r16", "r17",
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"r18", "r19", "r20", "r21", "r22", "r23", "r24",
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"r25", "r26", "r27", "r28", "r29", "r30", "r31"
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);
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cptr[1] = 1;
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while (!cptr[0])
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asm volatile("" : : : "memory");
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shmdt((void *)cptr);
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store_gpr(gpr_buf);
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store_fpr_single_precision(fpr_buf);
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if (validate_gpr(gpr_buf, GPR_3))
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exit(1);
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if (validate_fpr_float(fpr_buf, c))
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exit(1);
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exit(0);
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}
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int trace_gpr(pid_t child)
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{
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unsigned long gpr[18];
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unsigned long fpr[32];
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FAIL_IF(start_trace(child));
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FAIL_IF(show_gpr(child, gpr));
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FAIL_IF(validate_gpr(gpr, GPR_1));
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FAIL_IF(show_fpr(child, fpr));
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FAIL_IF(validate_fpr(fpr, FPR_1_REP));
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FAIL_IF(write_gpr(child, GPR_3));
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FAIL_IF(write_fpr(child, FPR_3_REP));
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FAIL_IF(stop_trace(child));
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return TEST_PASS;
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}
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int ptrace_gpr(void)
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{
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pid_t pid;
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int ret, status;
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shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
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pid = fork();
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if (pid < 0) {
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perror("fork() failed");
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return TEST_FAIL;
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}
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if (pid == 0)
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gpr();
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if (pid) {
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pptr = (int *)shmat(shm_id, NULL, 0);
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while (!pptr[1])
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asm volatile("" : : : "memory");
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ret = trace_gpr(pid);
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if (ret) {
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kill(pid, SIGTERM);
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shmdt((void *)pptr);
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shmctl(shm_id, IPC_RMID, NULL);
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return TEST_FAIL;
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}
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pptr[0] = 1;
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shmdt((void *)pptr);
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ret = wait(&status);
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shmctl(shm_id, IPC_RMID, NULL);
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if (ret != pid) {
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printf("Child's exit status not captured\n");
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return TEST_FAIL;
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}
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return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
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TEST_PASS;
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}
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return TEST_PASS;
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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(ptrace_gpr, "ptrace_gpr");
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}
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74
tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
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74
tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
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@@ -0,0 +1,74 @@
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/*
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* Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#define GPR_1 1
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#define GPR_2 2
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#define GPR_3 3
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#define GPR_4 4
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#define FPR_1 0.001
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#define FPR_2 0.002
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#define FPR_3 0.003
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#define FPR_4 0.004
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#define FPR_1_REP 0x3f50624de0000000
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#define FPR_2_REP 0x3f60624de0000000
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#define FPR_3_REP 0x3f689374c0000000
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#define FPR_4_REP 0x3f70624de0000000
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/* Buffer must have 18 elements */
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int validate_gpr(unsigned long *gpr, unsigned long val)
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{
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int i, found = 1;
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for (i = 0; i < 18; i++) {
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if (gpr[i] != val) {
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printf("GPR[%d]: %lx Expected: %lx\n",
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i+14, gpr[i], val);
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found = 0;
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}
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}
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if (!found)
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return TEST_FAIL;
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return TEST_PASS;
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}
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/* Buffer must have 32 elements */
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int validate_fpr(unsigned long *fpr, unsigned long val)
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{
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int i, found = 1;
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for (i = 0; i < 32; i++) {
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if (fpr[i] != val) {
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printf("FPR[%d]: %lx Expected: %lx\n", i, fpr[i], val);
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found = 0;
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}
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}
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if (!found)
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return TEST_FAIL;
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return TEST_PASS;
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}
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/* Buffer must have 32 elements */
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int validate_fpr_float(float *fpr, float val)
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{
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int i, found = 1;
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for (i = 0; i < 32; i++) {
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if (fpr[i] != val) {
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printf("FPR[%d]: %f Expected: %f\n", i, fpr[i], val);
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found = 0;
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}
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}
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if (!found)
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return TEST_FAIL;
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return TEST_PASS;
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}
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376
tools/testing/selftests/powerpc/ptrace/ptrace.h
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376
tools/testing/selftests/powerpc/ptrace/ptrace.h
Normal file
@@ -0,0 +1,376 @@
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/*
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* Ptrace interface test helper functions
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*
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* Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <inttypes.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <malloc.h>
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#include <errno.h>
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#include <time.h>
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#include <sys/ptrace.h>
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#include <sys/ioctl.h>
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#include <sys/uio.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/signal.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <sys/user.h>
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#include <linux/elf.h>
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#include <linux/types.h>
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#include <linux/auxvec.h>
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#include "reg.h"
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#include "utils.h"
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#define TEST_PASS 0
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#define TEST_FAIL 1
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struct fpr_regs {
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unsigned long fpr[32];
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unsigned long fpscr;
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};
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#ifndef NT_PPC_TAR
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#define NT_PPC_TAR 0x103
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#define NT_PPC_PPR 0x104
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#define NT_PPC_DSCR 0x105
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#define NT_PPC_EBB 0x106
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#define NT_PPC_PMU 0x107
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#define NT_PPC_TM_CGPR 0x108
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#define NT_PPC_TM_CFPR 0x109
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#define NT_PPC_TM_CVMX 0x10a
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#define NT_PPC_TM_CVSX 0x10b
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#define NT_PPC_TM_SPR 0x10c
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#define NT_PPC_TM_CTAR 0x10d
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#define NT_PPC_TM_CPPR 0x10e
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#define NT_PPC_TM_CDSCR 0x10f
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#endif
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/* Basic ptrace operations */
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int start_trace(pid_t child)
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{
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int ret;
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ret = ptrace(PTRACE_ATTACH, child, NULL, NULL);
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if (ret) {
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perror("ptrace(PTRACE_ATTACH) failed");
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return TEST_FAIL;
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}
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ret = waitpid(child, NULL, 0);
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if (ret != child) {
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perror("waitpid() failed");
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return TEST_FAIL;
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}
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return TEST_PASS;
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}
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int stop_trace(pid_t child)
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{
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int ret;
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ret = ptrace(PTRACE_DETACH, child, NULL, NULL);
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if (ret) {
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perror("ptrace(PTRACE_DETACH) failed");
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return TEST_FAIL;
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}
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return TEST_PASS;
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}
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int cont_trace(pid_t child)
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{
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int ret;
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ret = ptrace(PTRACE_CONT, child, NULL, NULL);
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if (ret) {
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perror("ptrace(PTRACE_CONT) failed");
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return TEST_FAIL;
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}
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return TEST_PASS;
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}
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/* FPR */
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int show_fpr(pid_t child, unsigned long *fpr)
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{
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struct fpr_regs *regs;
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int ret, i;
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regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
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ret = ptrace(PTRACE_GETFPREGS, child, NULL, regs);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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if (fpr) {
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for (i = 0; i < 32; i++)
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fpr[i] = regs->fpr[i];
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}
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return TEST_PASS;
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}
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int write_fpr(pid_t child, unsigned long val)
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{
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struct fpr_regs *regs;
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int ret, i;
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regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
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ret = ptrace(PTRACE_GETFPREGS, child, NULL, regs);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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for (i = 0; i < 32; i++)
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regs->fpr[i] = val;
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ret = ptrace(PTRACE_SETFPREGS, child, NULL, regs);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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return TEST_PASS;
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}
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int show_ckpt_fpr(pid_t child, unsigned long *fpr)
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{
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struct fpr_regs *regs;
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struct iovec iov;
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int ret, i;
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regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
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iov.iov_base = regs;
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iov.iov_len = sizeof(struct fpr_regs);
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ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CFPR, &iov);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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if (fpr) {
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for (i = 0; i < 32; i++)
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fpr[i] = regs->fpr[i];
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}
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return TEST_PASS;
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}
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int write_ckpt_fpr(pid_t child, unsigned long val)
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{
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struct fpr_regs *regs;
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struct iovec iov;
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int ret, i;
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regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
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iov.iov_base = regs;
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iov.iov_len = sizeof(struct fpr_regs);
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ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CFPR, &iov);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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for (i = 0; i < 32; i++)
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regs->fpr[i] = val;
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ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CFPR, &iov);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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return TEST_PASS;
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}
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/* GPR */
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int show_gpr(pid_t child, unsigned long *gpr)
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{
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struct pt_regs *regs;
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int ret, i;
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regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
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if (!regs) {
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perror("malloc() failed");
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return TEST_FAIL;
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}
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ret = ptrace(PTRACE_GETREGS, child, NULL, regs);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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if (gpr) {
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for (i = 14; i < 32; i++)
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gpr[i-14] = regs->gpr[i];
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}
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return TEST_PASS;
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}
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int write_gpr(pid_t child, unsigned long val)
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{
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struct pt_regs *regs;
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int i, ret;
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regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
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if (!regs) {
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perror("malloc() failed");
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return TEST_FAIL;
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}
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ret = ptrace(PTRACE_GETREGS, child, NULL, regs);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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for (i = 14; i < 32; i++)
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regs->gpr[i] = val;
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ret = ptrace(PTRACE_SETREGS, child, NULL, regs);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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return TEST_PASS;
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}
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int show_ckpt_gpr(pid_t child, unsigned long *gpr)
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{
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struct pt_regs *regs;
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struct iovec iov;
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int ret, i;
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regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
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if (!regs) {
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perror("malloc() failed");
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return TEST_FAIL;
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}
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iov.iov_base = (u64 *) regs;
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iov.iov_len = sizeof(struct pt_regs);
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ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CGPR, &iov);
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if (ret) {
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perror("ptrace(PTRACE_GETREGSET) failed");
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return TEST_FAIL;
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}
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||||
if (gpr) {
|
||||
for (i = 14; i < 32; i++)
|
||||
gpr[i-14] = regs->gpr[i];
|
||||
}
|
||||
|
||||
return TEST_PASS;
|
||||
}
|
||||
|
||||
int write_ckpt_gpr(pid_t child, unsigned long val)
|
||||
{
|
||||
struct pt_regs *regs;
|
||||
struct iovec iov;
|
||||
int ret, i;
|
||||
|
||||
regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
|
||||
if (!regs) {
|
||||
perror("malloc() failed\n");
|
||||
return TEST_FAIL;
|
||||
}
|
||||
iov.iov_base = (u64 *) regs;
|
||||
iov.iov_len = sizeof(struct pt_regs);
|
||||
|
||||
ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CGPR, &iov);
|
||||
if (ret) {
|
||||
perror("ptrace(PTRACE_GETREGSET) failed");
|
||||
return TEST_FAIL;
|
||||
}
|
||||
|
||||
for (i = 14; i < 32; i++)
|
||||
regs->gpr[i] = val;
|
||||
|
||||
ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CGPR, &iov);
|
||||
if (ret) {
|
||||
perror("ptrace(PTRACE_GETREGSET) failed");
|
||||
return TEST_FAIL;
|
||||
}
|
||||
return TEST_PASS;
|
||||
}
|
||||
|
||||
/* Analyse TEXASR after TM failure */
|
||||
inline unsigned long get_tfiar(void)
|
||||
{
|
||||
unsigned long ret;
|
||||
|
||||
asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_TFIAR));
|
||||
return ret;
|
||||
}
|
||||
|
||||
void analyse_texasr(unsigned long texasr)
|
||||
{
|
||||
printf("TEXASR: %16lx\t", texasr);
|
||||
|
||||
if (texasr & TEXASR_FP)
|
||||
printf("TEXASR_FP ");
|
||||
|
||||
if (texasr & TEXASR_DA)
|
||||
printf("TEXASR_DA ");
|
||||
|
||||
if (texasr & TEXASR_NO)
|
||||
printf("TEXASR_NO ");
|
||||
|
||||
if (texasr & TEXASR_FO)
|
||||
printf("TEXASR_FO ");
|
||||
|
||||
if (texasr & TEXASR_SIC)
|
||||
printf("TEXASR_SIC ");
|
||||
|
||||
if (texasr & TEXASR_NTC)
|
||||
printf("TEXASR_NTC ");
|
||||
|
||||
if (texasr & TEXASR_TC)
|
||||
printf("TEXASR_TC ");
|
||||
|
||||
if (texasr & TEXASR_TIC)
|
||||
printf("TEXASR_TIC ");
|
||||
|
||||
if (texasr & TEXASR_IC)
|
||||
printf("TEXASR_IC ");
|
||||
|
||||
if (texasr & TEXASR_IFC)
|
||||
printf("TEXASR_IFC ");
|
||||
|
||||
if (texasr & TEXASR_ABT)
|
||||
printf("TEXASR_ABT ");
|
||||
|
||||
if (texasr & TEXASR_SPD)
|
||||
printf("TEXASR_SPD ");
|
||||
|
||||
if (texasr & TEXASR_HV)
|
||||
printf("TEXASR_HV ");
|
||||
|
||||
if (texasr & TEXASR_PR)
|
||||
printf("TEXASR_PR ");
|
||||
|
||||
if (texasr & TEXASR_FS)
|
||||
printf("TEXASR_FS ");
|
||||
|
||||
if (texasr & TEXASR_TE)
|
||||
printf("TEXASR_TE ");
|
||||
|
||||
if (texasr & TEXASR_ROT)
|
||||
printf("TEXASR_ROT ");
|
||||
|
||||
printf("TFIAR :%lx\n", get_tfiar());
|
||||
}
|
||||
|
||||
void store_gpr(unsigned long *addr);
|
||||
void store_fpr(float *addr);
|
||||
Reference in New Issue
Block a user