156 lines
3.0 KiB
C
156 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Ptrace test for GPR/FPR registers in TM context
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*
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* Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
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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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unsigned long *cptr, *pptr;
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double a = FPR_1;
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double b = FPR_2;
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double c = FPR_3;
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void tm_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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double fpr_buf[32];
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printf("Starting the child\n");
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cptr = (unsigned long *)shmat(shm_id, NULL, 0);
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trans:
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cptr[1] = 0;
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asm __volatile__(
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ASM_LOAD_GPR_IMMED(gpr_1)
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ASM_LOAD_FPR(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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ASM_LOAD_FPR(flt_2)
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"tsuspend.;"
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"li 7, 1;"
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"stw 7, 0(%[cptr1]);"
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"tresume.;"
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"b .;"
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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),
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[sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "b" (&a),
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[flt_2] "b" (&b), [cptr1] "b" (&cptr[1])
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: "memory", "r0", "r7", "r8", "r9", "r10",
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"r11", "r12", "r13", "r14", "r15", "r16",
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"r17", "r18", "r19", "r20", "r21", "r22",
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"r23", "r24", "r25", "r26", "r27", "r28",
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"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(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_double(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_gpr(pid_t child)
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{
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unsigned long gpr[18];
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__u64 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_2));
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FAIL_IF(show_fpr(child, fpr));
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FAIL_IF(validate_fpr(fpr, FPR_2_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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FAIL_IF(stop_trace(child));
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return TEST_PASS;
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}
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int ptrace_tm_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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SKIP_IF(htm_is_synthetic());
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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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tm_gpr();
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if (pid) {
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pptr = (unsigned long *)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_tm_gpr(pid);
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if (ret) {
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kill(pid, SIGTERM);
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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_gpr, "ptrace_tm_gpr");
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}
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