selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended TM
This patch adds ptrace interface test for GPR/FPR registers inside suspended TM context. 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>
This commit is contained in:
Anshuman Khandual
Michael Ellerman
parent
509fcfe57b
commit
c7096dc0ee
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@ -1,2 +1,3 @@
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ptrace-gpr
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ptrace-tm-gpr
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ptrace-tm-gpr
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ptrace-tm-spd-gpr
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@ -1,4 +1,4 @@
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TEST_PROGS := ptrace-gpr ptrace-tm-gpr
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TEST_PROGS := ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr
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include ../../lib.mk
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@ -0,0 +1,169 @@
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/*
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* Ptrace test for GPR/FPR registers in TM Suspend context
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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 "tm.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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float d = FPR_4;
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__attribute__((used)) void wait_parent(void)
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{
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cptr[2] = 1;
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while (!cptr[1])
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asm volatile("" : : : "memory");
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}
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void tm_spd_gpr(void)
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{
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unsigned long gpr_buf[18];
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unsigned long result, texasr;
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float fpr_buf[32];
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cptr = (int *)shmat(shm_id, NULL, 0);
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trans:
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cptr[2] = 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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"1: ;"
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"tbegin.;"
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"beq 2f;"
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ASM_LOAD_GPR_IMMED(gpr_2)
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"tsuspend.;"
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ASM_LOAD_GPR_IMMED(gpr_4)
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ASM_LOAD_FPR_SINGLE_PRECISION(flt_4)
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"bl wait_parent;"
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"tresume.;"
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"tend.;"
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"li 0, 0;"
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"ori %[res], 0, 0;"
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"b 3f;"
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/* Transaction abort handler */
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"2: ;"
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"li 0, 1;"
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"ori %[res], 0, 0;"
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"mfspr %[texasr], %[sprn_texasr];"
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"3: ;"
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: [res] "=r" (result), [texasr] "=r" (texasr)
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: [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2), [gpr_4]"i"(GPR_4),
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[sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "r" (&a),
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[flt_2] "r" (&b), [flt_4] "r" (&d)
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: "memory", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
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);
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if (result) {
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if (!cptr[0])
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goto trans;
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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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shmdt((void *)cptr);
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exit(1);
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}
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int trace_tm_spd_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_4));
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FAIL_IF(show_fpr(child, fpr));
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FAIL_IF(validate_fpr(fpr, FPR_4_REP));
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FAIL_IF(show_ckpt_fpr(child, fpr));
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FAIL_IF(validate_fpr(fpr, FPR_1_REP));
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FAIL_IF(show_ckpt_gpr(child, gpr));
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FAIL_IF(validate_gpr(gpr, GPR_1));
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FAIL_IF(write_ckpt_gpr(child, GPR_3));
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FAIL_IF(write_ckpt_fpr(child, FPR_3_REP));
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pptr[0] = 1;
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pptr[1] = 1;
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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_tm_spd_gpr(void)
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{
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pid_t pid;
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int ret, status;
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SKIP_IF(!have_htm());
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shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 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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tm_spd_gpr();
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if (pid) {
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pptr = (int *)shmat(shm_id, NULL, 0);
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pptr[0] = 0;
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pptr[1] = 0;
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while (!pptr[2])
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asm volatile("" : : : "memory");
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ret = trace_tm_spd_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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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_tm_spd_gpr, "ptrace_tm_spd_gpr");
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}
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