[PATCH v11 18/27] selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended TM

wei.guo.simon
2016-07-17T02:03:12Z

This patch adds ptrace interface test for GPR/FPR registers
inside suspended TM context.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Cyril Bur <cyrilbur@gmail.com>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Simon Guo <wei.guo.simon@gmail.com>
Cc: Ulrich Weigand <ulrich.weigand@de.ibm.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Rashmica Gupta <rashmicy@gmail.com>
Cc: Khem Raj <raj.khem@gmail.com>
Cc: Jessica Yu <jeyu@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Miroslav Benes <mbenes@suse.cz>
Cc: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Cc: Chris Smart <chris@distroguy.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c | 322 +++++++++++++++++++++
2 files changed, 323 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c

diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 170683a..d0f000c 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,4 +1,4 @@
-TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr
+TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr

all: $(TEST_PROGS)
CFLAGS += -m64
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c
new file mode 100644
index 0000000..db3a57b
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c
@@ -0,0 +1,322 @@
+/*
+ * Ptrace test for GPR/FPR registers in TM Suspend context
+ *
+ * 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;
+float d = FPR_4;
+
+__attribute__((used)) void wait_parent(void)
+{
+ cptr[2] = 1;
+ while (!cptr[1]);
+}
+
+void tm_spd_gpr(void)
+{
+ unsigned long gpr_buf[18];
+ unsigned long result, texasr;
+ float fpr_buf[32];
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+
+trans:
+ cptr[2] = 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]);"
+
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "li 14, %[gpr_2];"
+ "li 15, %[gpr_2];"
+ "li 16, %[gpr_2];"
+ "li 17, %[gpr_2];"
+ "li 18, %[gpr_2];"
+ "li 19, %[gpr_2];"
+ "li 20, %[gpr_2];"
+ "li 21, %[gpr_2];"
+ "li 22, %[gpr_2];"
+ "li 23, %[gpr_2];"
+ "li 24, %[gpr_2];"
+ "li 25, %[gpr_2];"
+ "li 26, %[gpr_2];"
+ "li 27, %[gpr_2];"
+ "li 28, %[gpr_2];"
+ "li 29, %[gpr_2];"
+ "li 30, %[gpr_2];"
+ "li 31, %[gpr_2];"
+
+ TSUSPEND
+
+ "li 14, %[gpr_4];"
+ "li 15, %[gpr_4];"
+ "li 16, %[gpr_4];"
+ "li 17, %[gpr_4];"
+ "li 18, %[gpr_4];"
+ "li 19, %[gpr_4];"
+ "li 20, %[gpr_4];"
+ "li 21, %[gpr_4];"
+ "li 22, %[gpr_4];"
+ "li 23, %[gpr_4];"
+ "li 24, %[gpr_4];"
+ "li 25, %[gpr_4];"
+ "li 26, %[gpr_4];"
+ "li 27, %[gpr_4];"
+ "li 28, %[gpr_4];"
+ "li 29, %[gpr_4];"
+ "li 30, %[gpr_4];"
+ "li 31, %[gpr_4];"
+
+ "lfs 0, 0(%[flt_4]);"
+ "lfs 1, 0(%[flt_4]);"
+ "lfs 2, 0(%[flt_4]);"
+ "lfs 3, 0(%[flt_4]);"
+ "lfs 4, 0(%[flt_4]);"
+ "lfs 5, 0(%[flt_4]);"
+ "lfs 6, 0(%[flt_4]);"
+ "lfs 7, 0(%[flt_4]);"
+ "lfs 8, 0(%[flt_4]);"
+ "lfs 9, 0(%[flt_4]);"
+ "lfs 10, 0(%[flt_4]);"
+ "lfs 11, 0(%[flt_4]);"
+ "lfs 12, 0(%[flt_4]);"
+ "lfs 13, 0(%[flt_4]);"
+ "lfs 14, 0(%[flt_4]);"
+ "lfs 15, 0(%[flt_4]);"
+ "lfs 16, 0(%[flt_4]);"
+ "lfs 17, 0(%[flt_4]);"
+ "lfs 18, 0(%[flt_4]);"
+ "lfs 19, 0(%[flt_4]);"
+ "lfs 20, 0(%[flt_4]);"
+ "lfs 21, 0(%[flt_4]);"
+ "lfs 22, 0(%[flt_4]);"
+ "lfs 23, 0(%[flt_4]);"
+ "lfs 24, 0(%[flt_4]);"
+ "lfs 25, 0(%[flt_4]);"
+ "lfs 26, 0(%[flt_4]);"
+ "lfs 27, 0(%[flt_4]);"
+ "lfs 28, 0(%[flt_4]);"
+ "lfs 29, 0(%[flt_4]);"
+ "lfs 30, 0(%[flt_4]);"
+ "lfs 31, 0(%[flt_4]);"
+ "bl wait_parent;"
+
+ TRESUME
+
+ TEND
+ "li 0, 0;"
+ "ori %[res], 0, 0;"
+ "b 3f;"
+
+ /* Transaction abort handler */
+ "2: ;"
+ "li 0, 1;"
+ "ori %[res], 0, 0;"
+ "mfspr %[texasr], %[sprn_texasr];"
+
+ "3: ;"
+ : [res] "=r" (result), [texasr] "=r" (texasr)
+ : [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2), [gpr_4]"i"(GPR_4),
+ [sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "r" (&a),
+ [flt_2] "r" (&b), [flt_4] "r" (&d)
+ : "memory", "r5", "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"
+ );
+
+ if (result) {
+ if (!cptr[0])
+ goto trans;
+
+ 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);
+ }
+ exit(1);
+}
+
+int trace_tm_spd_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_4);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_fpr(child, fpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_fpr(fpr, FPR_4_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_ckpt_fpr(child, fpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_fpr(fpr, FPR_1_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = show_ckpt_gpr(child, gpr);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = validate_gpr(gpr, GPR_1);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_ckpt_gpr(child, GPR_3);
+ if (ret)
+ return TEST_FAIL;
+
+ ret = write_ckpt_fpr(child, FPR_3_REP);
+ if (ret)
+ return TEST_FAIL;
+
+ pptr[0] = 1;
+ pptr[1] = 1;
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_tm_spd_gpr(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ tm_spd_gpr();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ pptr[0] = 0;
+ pptr[1] = 0;
+
+ while (!pptr[2]);
+ ret = trace_tm_spd_gpr(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ return TEST_FAIL;
+ }
+
+ shmdt((void *)pptr);
+
+ ret = wait(&status);
+ 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_tm_spd_gpr, "ptrace_tm_spd_gpr");
+}
--
1.8.3.1