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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Ptrace test for GPR/FPR registers in TM context4 *5 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.6 */7#include "ptrace.h"8#include "ptrace-gpr.h"9#include "tm.h"10 11/* Tracer and Tracee Shared Data */12int shm_id;13unsigned long *cptr, *pptr;14 15double a = FPR_1;16double b = FPR_2;17double c = FPR_3;18 19void tm_gpr(void)20{21 unsigned long gpr_buf[18];22 unsigned long result, texasr;23 double fpr_buf[32];24 25 printf("Starting the child\n");26 cptr = (unsigned long *)shmat(shm_id, NULL, 0);27 28trans:29 cptr[1] = 0;30 asm __volatile__(31 ASM_LOAD_GPR_IMMED(gpr_1)32 ASM_LOAD_FPR(flt_1)33 "1: ;"34 "tbegin.;"35 "beq 2f;"36 ASM_LOAD_GPR_IMMED(gpr_2)37 ASM_LOAD_FPR(flt_2)38 "tsuspend.;"39 "li 7, 1;"40 "stw 7, 0(%[cptr1]);"41 "tresume.;"42 "b .;"43 44 "tend.;"45 "li 0, 0;"46 "ori %[res], 0, 0;"47 "b 3f;"48 49 /* Transaction abort handler */50 "2: ;"51 "li 0, 1;"52 "ori %[res], 0, 0;"53 "mfspr %[texasr], %[sprn_texasr];"54 55 "3: ;"56 : [res] "=r" (result), [texasr] "=r" (texasr)57 : [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2),58 [sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "b" (&a),59 [flt_2] "b" (&b), [cptr1] "b" (&cptr[1])60 : "memory", "r0", "r7", "r8", "r9", "r10",61 "r11", "r12", "r13", "r14", "r15", "r16",62 "r17", "r18", "r19", "r20", "r21", "r22",63 "r23", "r24", "r25", "r26", "r27", "r28",64 "r29", "r30", "r31"65 );66 67 if (result) {68 if (!cptr[0])69 goto trans;70 71 shmdt((void *)cptr);72 store_gpr(gpr_buf);73 store_fpr(fpr_buf);74 75 if (validate_gpr(gpr_buf, GPR_3))76 exit(1);77 78 if (validate_fpr_double(fpr_buf, c))79 exit(1);80 81 exit(0);82 }83 shmdt((void *)cptr);84 exit(1);85}86 87int trace_tm_gpr(pid_t child)88{89 unsigned long gpr[18];90 __u64 fpr[32];91 92 FAIL_IF(start_trace(child));93 FAIL_IF(show_gpr(child, gpr));94 FAIL_IF(validate_gpr(gpr, GPR_2));95 FAIL_IF(show_fpr(child, fpr));96 FAIL_IF(validate_fpr(fpr, FPR_2_REP));97 FAIL_IF(show_ckpt_fpr(child, fpr));98 FAIL_IF(validate_fpr(fpr, FPR_1_REP));99 FAIL_IF(show_ckpt_gpr(child, gpr));100 FAIL_IF(validate_gpr(gpr, GPR_1));101 FAIL_IF(write_ckpt_gpr(child, GPR_3));102 FAIL_IF(write_ckpt_fpr(child, FPR_3_REP));103 104 pptr[0] = 1;105 FAIL_IF(stop_trace(child));106 107 return TEST_PASS;108}109 110int ptrace_tm_gpr(void)111{112 pid_t pid;113 int ret, status;114 115 SKIP_IF_MSG(!have_htm(), "Don't have transactional memory");116 SKIP_IF_MSG(htm_is_synthetic(), "Transactional memory is synthetic");117 shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);118 pid = fork();119 if (pid < 0) {120 perror("fork() failed");121 return TEST_FAIL;122 }123 if (pid == 0)124 tm_gpr();125 126 if (pid) {127 pptr = (unsigned long *)shmat(shm_id, NULL, 0);128 129 while (!pptr[1])130 asm volatile("" : : : "memory");131 ret = trace_tm_gpr(pid);132 if (ret) {133 kill(pid, SIGTERM);134 return TEST_FAIL;135 }136 137 shmdt((void *)pptr);138 139 ret = wait(&status);140 shmctl(shm_id, IPC_RMID, NULL);141 if (ret != pid) {142 printf("Child's exit status not captured\n");143 return TEST_FAIL;144 }145 146 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :147 TEST_PASS;148 }149 return TEST_PASS;150}151 152int main(int argc, char *argv[])153{154 return test_harness(ptrace_tm_gpr, "ptrace_tm_gpr");155}156