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Date: Thu, 28 Jul 2016 10:57:48 +0800
From: wei.guo.simon@...il.com
To: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc: Michael Ellerman <mpe@...erman.id.au>,
Shuah Khan <shuahkh@....samsung.com>,
Anton Blanchard <anton@...ba.org>,
Cyril Bur <cyrilbur@...il.com>,
Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
Simon Guo <wei.guo.simon@...il.com>,
Ulrich Weigand <ulrich.weigand@...ibm.com>,
Michael Neuling <mikey@...ling.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Kees Cook <keescook@...omium.org>,
Rashmica Gupta <rashmicy@...il.com>,
Khem Raj <raj.khem@...il.com>, Jessica Yu <jeyu@...hat.com>,
Jiri Kosina <jkosina@...e.cz>, Miroslav Benes <mbenes@...e.cz>,
Suraj Jitindar Singh <sjitindarsingh@...il.com>,
Chris Smart <chris@...troguy.com>,
linux-kselftest@...r.kernel.org
Subject: [PATCH v13 19/30] selftests/powerpc: Add ptrace tests for GPR/FPR registers
From: Anshuman Khandual <khandual@...ux.vnet.ibm.com>
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@...ux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@...il.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../testing/selftests/powerpc/ptrace/ptrace-gpr.c | 199 ++++++++++++++++++++
.../testing/selftests/powerpc/ptrace/ptrace-gpr.h | 74 ++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.S | 131 +++++++++++++
tools/testing/selftests/powerpc/ptrace/ptrace.h | 208 +++++++++++++++++++++
5 files changed, 614 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace.S
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index f6948f3..31e8e33 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,4 +1,5 @@
-TEST_PROGS := ptrace-ebb
+TEST_PROGS := ptrace-ebb ptrace-gpr
+
all: $(TEST_PROGS)
CFLAGS += -m64
$(TEST_PROGS): ../harness.c ptrace.S ../utils.c ptrace.h
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
new file mode 100644
index 0000000..86bd6a4d
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.c
@@ -0,0 +1,199 @@
+/*
+ * Ptrace test for GPR/FPR 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-gpr.h"
+
+/* Tracer and Tracee Shared Data */
+int shm_id;
+volatile int *cptr, *pptr;
+
+void store_gpr(unsigned long *addr);
+void store_fpr(float *addr);
+
+float a = FPR_1;
+float b = FPR_2;
+float c = FPR_3;
+
+void gpr(void)
+{
+ unsigned long gpr_buf[18];
+ float fpr_buf[32];
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+
+ asm __volatile__(
+ "li 14, %[gpr_1];"
+ "li 15, %[gpr_1];"
+ "li 16, %[gpr_1];"
+ "li 17, %[gpr_1];"
+ "li 18, %[gpr_1];"
+ "li 19, %[gpr_1];"
+ "li 20, %[gpr_1];"
+ "li 21, %[gpr_1];"
+ "li 22, %[gpr_1];"
+ "li 23, %[gpr_1];"
+ "li 24, %[gpr_1];"
+ "li 25, %[gpr_1];"
+ "li 26, %[gpr_1];"
+ "li 27, %[gpr_1];"
+ "li 28, %[gpr_1];"
+ "li 29, %[gpr_1];"
+ "li 30, %[gpr_1];"
+ "li 31, %[gpr_1];"
+
+ "lfs 0, 0(%[flt_1]);"
+ "lfs 1, 0(%[flt_1]);"
+ "lfs 2, 0(%[flt_1]);"
+ "lfs 3, 0(%[flt_1]);"
+ "lfs 4, 0(%[flt_1]);"
+ "lfs 5, 0(%[flt_1]);"
+ "lfs 6, 0(%[flt_1]);"
+ "lfs 7, 0(%[flt_1]);"
+ "lfs 8, 0(%[flt_1]);"
+ "lfs 9, 0(%[flt_1]);"
+ "lfs 10, 0(%[flt_1]);"
+ "lfs 11, 0(%[flt_1]);"
+ "lfs 12, 0(%[flt_1]);"
+ "lfs 13, 0(%[flt_1]);"
+ "lfs 14, 0(%[flt_1]);"
+ "lfs 15, 0(%[flt_1]);"
+ "lfs 16, 0(%[flt_1]);"
+ "lfs 17, 0(%[flt_1]);"
+ "lfs 18, 0(%[flt_1]);"
+ "lfs 19, 0(%[flt_1]);"
+ "lfs 20, 0(%[flt_1]);"
+ "lfs 21, 0(%[flt_1]);"
+ "lfs 22, 0(%[flt_1]);"
+ "lfs 23, 0(%[flt_1]);"
+ "lfs 24, 0(%[flt_1]);"
+ "lfs 25, 0(%[flt_1]);"
+ "lfs 26, 0(%[flt_1]);"
+ "lfs 27, 0(%[flt_1]);"
+ "lfs 28, 0(%[flt_1]);"
+ "lfs 29, 0(%[flt_1]);"
+ "lfs 30, 0(%[flt_1]);"
+ "lfs 31, 0(%[flt_1]);"
+
+ :
+ : [gpr_1]"i"(GPR_1), [flt_1] "r" (&a)
+ : "memory", "r6", "r7", "r8", "r9", "r10",
+ "r11", "r12", "r13", "r14", "r15", "r16", "r17",
+ "r18", "r19", "r20", "r21", "r22", "r23", "r24",
+ "r25", "r26", "r27", "r28", "r29", "r30", "r31"
+ );
+
+ cptr[1] = 1;
+
+ while (!cptr[0]);
+
+ shmdt((void *)cptr);
+ store_gpr(gpr_buf);
+ store_fpr(fpr_buf);
+
+ if (validate_gpr(gpr_buf, GPR_3))
+ exit(1);
+
+ if (validate_fpr_float(fpr_buf, c))
+ exit(1);
+
+ exit(0);
+}
+
+int trace_gpr(pid_t child)
+{
+ unsigned long gpr[18];
+ unsigned long fpr[32];
+ int ret;
+
+ ret = start_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_gpr(child, gpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_gpr(gpr, GPR_1);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_fpr(child, fpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_fpr(fpr, FPR_1_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_gpr(child, GPR_3);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_fpr(child, FPR_3_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_gpr(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+ if (pid == 0)
+ gpr();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ while (!pptr[1]);
+
+ ret = trace_gpr(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ shmdt((void *)pptr);
+ shmctl(shm_id, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+
+ pptr[0] = 1;
+ shmdt((void *)pptr);
+
+ ret = wait(&status);
+ shmctl(shm_id, IPC_RMID, NULL);
+ if (ret != pid) {
+ printf("Child's exit status not captured\n");
+ return TEST_FAIL;
+ }
+
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status))
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+ }
+ return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_gpr, "ptrace_gpr");
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
new file mode 100644
index 0000000..e30fef6
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-gpr.h
@@ -0,0 +1,74 @@
+/*
+ * 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.
+ */
+#define GPR_1 1
+#define GPR_2 2
+#define GPR_3 3
+#define GPR_4 4
+
+#define FPR_1 0.001
+#define FPR_2 0.002
+#define FPR_3 0.003
+#define FPR_4 0.004
+
+#define FPR_1_REP 0x3f50624de0000000
+#define FPR_2_REP 0x3f60624de0000000
+#define FPR_3_REP 0x3f689374c0000000
+#define FPR_4_REP 0x3f70624de0000000
+
+/* Buffer must have 18 elements */
+int validate_gpr(unsigned long *gpr, unsigned long val)
+{
+ int i, found = 1;
+
+ for (i = 0; i < 18; i++) {
+ if (gpr[i] != val) {
+ printf("GPR[%d]: %lx Expected: %lx\n",
+ i+14, gpr[i], val);
+ found = 0;
+ }
+ }
+
+ if (!found)
+ return TEST_FAIL;
+ return TEST_PASS;
+}
+
+/* Buffer must have 32 elements */
+int validate_fpr(unsigned long *fpr, unsigned long val)
+{
+ int i, found = 1;
+
+ for (i = 0; i < 32; i++) {
+ if (fpr[i] != val) {
+ printf("FPR[%d]: %lx Expected: %lx\n", i, fpr[i], val);
+ found = 0;
+ }
+ }
+
+ if (!found)
+ return TEST_FAIL;
+ return TEST_PASS;
+}
+
+/* Buffer must have 32 elements */
+int validate_fpr_float(float *fpr, float val)
+{
+ int i, found = 1;
+
+ for (i = 0; i < 32; i++) {
+ if (fpr[i] != val) {
+ printf("FPR[%d]: %f Expected: %f\n", i, fpr[i], val);
+ found = 0;
+ }
+ }
+
+ if (!found)
+ return TEST_FAIL;
+ return TEST_PASS;
+}
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.S b/tools/testing/selftests/powerpc/ptrace/ptrace.S
new file mode 100644
index 0000000..193beea
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.S
@@ -0,0 +1,131 @@
+/*
+ * Ptrace interface test helper assembly functions
+ *
+ * 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 <ppc-asm.h>
+#include "../reg.h"
+
+
+/* Non volatile GPR - unsigned long buf[18] */
+FUNC_START(load_gpr)
+ ld 14, 0*8(3)
+ ld 15, 1*8(3)
+ ld 16, 2*8(3)
+ ld 17, 3*8(3)
+ ld 18, 4*8(3)
+ ld 19, 5*8(3)
+ ld 20, 6*8(3)
+ ld 21, 7*8(3)
+ ld 22, 8*8(3)
+ ld 23, 9*8(3)
+ ld 24, 10*8(3)
+ ld 25, 11*8(3)
+ ld 26, 12*8(3)
+ ld 27, 13*8(3)
+ ld 28, 14*8(3)
+ ld 29, 15*8(3)
+ ld 30, 16*8(3)
+ ld 31, 17*8(3)
+ blr
+FUNC_END(load_gpr)
+
+FUNC_START(store_gpr)
+ std 14, 0*8(3)
+ std 15, 1*8(3)
+ std 16, 2*8(3)
+ std 17, 3*8(3)
+ std 18, 4*8(3)
+ std 19, 5*8(3)
+ std 20, 6*8(3)
+ std 21, 7*8(3)
+ std 22, 8*8(3)
+ std 23, 9*8(3)
+ std 24, 10*8(3)
+ std 25, 11*8(3)
+ std 26, 12*8(3)
+ std 27, 13*8(3)
+ std 28, 14*8(3)
+ std 29, 15*8(3)
+ std 30, 16*8(3)
+ std 31, 17*8(3)
+ blr
+FUNC_END(store_gpr)
+
+/* Single Precision Float - float buf[32] */
+FUNC_START(load_fpr)
+ lfs 0, 0*4(3)
+ lfs 1, 1*4(3)
+ lfs 2, 2*4(3)
+ lfs 3, 3*4(3)
+ lfs 4, 4*4(3)
+ lfs 5, 5*4(3)
+ lfs 6, 6*4(3)
+ lfs 7, 7*4(3)
+ lfs 8, 8*4(3)
+ lfs 9, 9*4(3)
+ lfs 10, 10*4(3)
+ lfs 11, 11*4(3)
+ lfs 12, 12*4(3)
+ lfs 13, 13*4(3)
+ lfs 14, 14*4(3)
+ lfs 15, 15*4(3)
+ lfs 16, 16*4(3)
+ lfs 17, 17*4(3)
+ lfs 18, 18*4(3)
+ lfs 19, 19*4(3)
+ lfs 20, 20*4(3)
+ lfs 21, 21*4(3)
+ lfs 22, 22*4(3)
+ lfs 23, 23*4(3)
+ lfs 24, 24*4(3)
+ lfs 25, 25*4(3)
+ lfs 26, 26*4(3)
+ lfs 27, 27*4(3)
+ lfs 28, 28*4(3)
+ lfs 29, 29*4(3)
+ lfs 30, 30*4(3)
+ lfs 31, 31*4(3)
+ blr
+FUNC_END(load_fpr)
+
+FUNC_START(store_fpr)
+ stfs 0, 0*4(3)
+ stfs 1, 1*4(3)
+ stfs 2, 2*4(3)
+ stfs 3, 3*4(3)
+ stfs 4, 4*4(3)
+ stfs 5, 5*4(3)
+ stfs 6, 6*4(3)
+ stfs 7, 7*4(3)
+ stfs 8, 8*4(3)
+ stfs 9, 9*4(3)
+ stfs 10, 10*4(3)
+ stfs 11, 11*4(3)
+ stfs 12, 12*4(3)
+ stfs 13, 13*4(3)
+ stfs 14, 14*4(3)
+ stfs 15, 15*4(3)
+ stfs 16, 16*4(3)
+ stfs 17, 17*4(3)
+ stfs 18, 18*4(3)
+ stfs 19, 19*4(3)
+ stfs 20, 20*4(3)
+ stfs 21, 21*4(3)
+ stfs 22, 22*4(3)
+ stfs 23, 23*4(3)
+ stfs 24, 24*4(3)
+ stfs 25, 25*4(3)
+ stfs 26, 26*4(3)
+ stfs 27, 27*4(3)
+ stfs 28, 28*4(3)
+ stfs 29, 29*4(3)
+ stfs 30, 30*4(3)
+ stfs 31, 31*4(3)
+ blr
+FUNC_END(store_fpr)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.h b/tools/testing/selftests/powerpc/ptrace/ptrace.h
index 37d7c59..b6df47f 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.h
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -172,6 +172,214 @@ fail:
return TEST_FAIL;
}
+/* FPR */
+int show_fpr(pid_t child, unsigned long *fpr)
+{
+ struct fpr_regs *regs;
+ int ret, i;
+
+ regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
+ ret = ptrace(PTRACE_GETFPREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ if (fpr) {
+ for (i = 0; i < 32; i++)
+ fpr[i] = regs->fpr[i];
+ }
+ return TEST_PASS;
+}
+
+int write_fpr(pid_t child, unsigned long val)
+{
+ struct fpr_regs *regs;
+ int ret, i;
+
+ regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
+ ret = ptrace(PTRACE_GETFPREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ for (i = 0; i < 32; i++)
+ regs->fpr[i] = val;
+
+ ret = ptrace(PTRACE_SETFPREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int show_ckpt_fpr(pid_t child, unsigned long *fpr)
+{
+ struct fpr_regs *regs;
+ struct iovec iov;
+ int ret, i;
+
+ regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
+ iov.iov_base = regs;
+ iov.iov_len = sizeof(struct fpr_regs);
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CFPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ if (fpr) {
+ for (i = 0; i < 32; i++)
+ fpr[i] = regs->fpr[i];
+ }
+
+ return TEST_PASS;
+}
+
+int write_ckpt_fpr(pid_t child, unsigned long val)
+{
+ struct fpr_regs *regs;
+ struct iovec iov;
+ int ret, i;
+
+ regs = (struct fpr_regs *) malloc(sizeof(struct fpr_regs));
+ iov.iov_base = regs;
+ iov.iov_len = sizeof(struct fpr_regs);
+
+ ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CFPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ for (i = 0; i < 32; i++)
+ regs->fpr[i] = val;
+
+ ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CFPR, &iov);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+/* GPR */
+int show_gpr(pid_t child, unsigned long *gpr)
+{
+ struct pt_regs *regs;
+ int ret, i;
+
+ regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
+ if (!regs) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ ret = ptrace(PTRACE_GETREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ if (gpr) {
+ for (i = 14; i < 32; i++)
+ gpr[i-14] = regs->gpr[i];
+ }
+
+ return TEST_PASS;
+}
+
+int write_gpr(pid_t child, unsigned long val)
+{
+ struct pt_regs *regs;
+ int i, ret;
+
+ regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
+ if (!regs) {
+ perror("malloc() failed");
+ return TEST_FAIL;
+ }
+
+ ret = ptrace(PTRACE_GETREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+
+ for (i = 14; i < 32; i++)
+ regs->gpr[i] = val;
+
+ ret = ptrace(PTRACE_SETREGS, child, NULL, regs);
+ if (ret) {
+ perror("ptrace(PTRACE_GETREGSET) failed");
+ return TEST_FAIL;
+ }
+ return TEST_PASS;
+}
+
+int show_ckpt_gpr(pid_t child, unsigned long *gpr)
+{
+ struct pt_regs *regs;
+ struct iovec iov;
+ int ret, i;
+
+ regs = (struct pt_regs *) malloc(sizeof(struct pt_regs));
+ if (!regs) {
+ perror("malloc() failed");
+ 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;
+ }
+
+ 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)
{
--
1.8.3.1
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