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Message-Id: <1477480437-12937-7-git-send-email-wei.guo.simon@gmail.com>
Date: Wed, 26 Oct 2016 19:13:48 +0800
From: wei.guo.simon@...il.com
To: linuxppc-dev@...ts.ozlabs.org
Cc: Shuah Khan <shuah@...nel.org>,
Michael Ellerman <mpe@...erman.id.au>,
Cyril Bur <cyrilbur@...il.com>,
Chris Smart <chris@...troguy.com>,
Suraj Jitindar Singh <sjitindarsingh@...il.com>,
Michael Neuling <mikey@...ling.org>,
Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
Simon Guo <wei.guo.simon@...il.com>,
Jack Miller <jack@...ezen.org>,
Rashmica Gupta <rashmicy@...il.com>,
linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH v16 06/15] selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended TM
From: Anshuman Khandual <khandual@...ux.vnet.ibm.com>
This patch adds ptrace interface test for GPR/FPR registers
inside suspended TM context.
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 | 2 +-
.../selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c | 169 +++++++++++++++++++++
2 files changed, 170 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 bb958a8..9f3ed2b 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
include ../../lib.mk
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..327fa94
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c
@@ -0,0 +1,169 @@
+/*
+ * 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"
+#include "tm.h"
+
+/* Tracer and Tracee Shared Data */
+int shm_id;
+int *cptr, *pptr;
+
+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])
+ asm volatile("" : : : "memory");
+}
+
+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__(
+ ASM_LOAD_GPR_IMMED(gpr_1)
+ ASM_LOAD_FPR_SINGLE_PRECISION(flt_1)
+
+ "1: ;"
+ "tbegin.;"
+ "beq 2f;"
+
+ ASM_LOAD_GPR_IMMED(gpr_2)
+ "tsuspend.;"
+ ASM_LOAD_GPR_IMMED(gpr_4)
+ ASM_LOAD_FPR_SINGLE_PRECISION(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;
+
+ shmdt((void *)cptr);
+ store_gpr(gpr_buf);
+ store_fpr_single_precision(fpr_buf);
+
+ if (validate_gpr(gpr_buf, GPR_3))
+ exit(1);
+
+ if (validate_fpr_float(fpr_buf, c))
+ exit(1);
+ exit(0);
+ }
+ shmdt((void *)cptr);
+ exit(1);
+}
+
+int trace_tm_spd_gpr(pid_t child)
+{
+ unsigned long gpr[18];
+ unsigned long fpr[32];
+
+ FAIL_IF(start_trace(child));
+ FAIL_IF(show_gpr(child, gpr));
+ FAIL_IF(validate_gpr(gpr, GPR_4));
+ FAIL_IF(show_fpr(child, fpr));
+ FAIL_IF(validate_fpr(fpr, FPR_4_REP));
+ FAIL_IF(show_ckpt_fpr(child, fpr));
+ FAIL_IF(validate_fpr(fpr, FPR_1_REP));
+ FAIL_IF(show_ckpt_gpr(child, gpr));
+ FAIL_IF(validate_gpr(gpr, GPR_1));
+ FAIL_IF(write_ckpt_gpr(child, GPR_3));
+ FAIL_IF(write_ckpt_fpr(child, FPR_3_REP));
+
+ pptr[0] = 1;
+ pptr[1] = 1;
+ FAIL_IF(stop_trace(child));
+ return TEST_PASS;
+}
+
+int ptrace_tm_spd_gpr(void)
+{
+ pid_t pid;
+ int ret, status;
+
+ SKIP_IF(!have_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])
+ asm volatile("" : : : "memory");
+ ret = trace_tm_spd_gpr(pid);
+ if (ret) {
+ kill(pid, SIGTERM);
+ shmdt((void *)pptr);
+ shmctl(shm_id, IPC_RMID, NULL);
+ return TEST_FAIL;
+ }
+
+ 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;
+ }
+
+ return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
+ 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
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