1 /* 2 * Ptrace test for GPR/FPR registers in TM context 3 * 4 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 #include "ptrace.h" 12 #include "ptrace-gpr.h" 13 #include "tm.h" 14 15 /* Tracer and Tracee Shared Data */ 16 int shm_id; 17 unsigned long *cptr, *pptr; 18 19 float a = FPR_1; 20 float b = FPR_2; 21 float c = FPR_3; 22 23 void tm_gpr(void) 24 { 25 unsigned long gpr_buf[18]; 26 unsigned long result, texasr; 27 float fpr_buf[32]; 28 29 printf("Starting the child\n"); 30 cptr = (unsigned long *)shmat(shm_id, NULL, 0); 31 32 trans: 33 cptr[1] = 0; 34 asm __volatile__( 35 ASM_LOAD_GPR_IMMED(gpr_1) 36 ASM_LOAD_FPR_SINGLE_PRECISION(flt_1) 37 "1: ;" 38 "tbegin.;" 39 "beq 2f;" 40 ASM_LOAD_GPR_IMMED(gpr_2) 41 ASM_LOAD_FPR_SINGLE_PRECISION(flt_2) 42 "tsuspend.;" 43 "li 7, 1;" 44 "stw 7, 0(%[cptr1]);" 45 "tresume.;" 46 "b .;" 47 48 "tend.;" 49 "li 0, 0;" 50 "ori %[res], 0, 0;" 51 "b 3f;" 52 53 /* Transaction abort handler */ 54 "2: ;" 55 "li 0, 1;" 56 "ori %[res], 0, 0;" 57 "mfspr %[texasr], %[sprn_texasr];" 58 59 "3: ;" 60 : [res] "=r" (result), [texasr] "=r" (texasr) 61 : [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2), 62 [sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "r" (&a), 63 [flt_2] "r" (&b), [cptr1] "r" (&cptr[1]) 64 : "memory", "r7", "r8", "r9", "r10", 65 "r11", "r12", "r13", "r14", "r15", "r16", 66 "r17", "r18", "r19", "r20", "r21", "r22", 67 "r23", "r24", "r25", "r26", "r27", "r28", 68 "r29", "r30", "r31" 69 ); 70 71 if (result) { 72 if (!cptr[0]) 73 goto trans; 74 75 shmdt((void *)cptr); 76 store_gpr(gpr_buf); 77 store_fpr_single_precision(fpr_buf); 78 79 if (validate_gpr(gpr_buf, GPR_3)) 80 exit(1); 81 82 if (validate_fpr_float(fpr_buf, c)) 83 exit(1); 84 85 exit(0); 86 } 87 shmdt((void *)cptr); 88 exit(1); 89 } 90 91 int trace_tm_gpr(pid_t child) 92 { 93 unsigned long gpr[18]; 94 unsigned long fpr[32]; 95 96 FAIL_IF(start_trace(child)); 97 FAIL_IF(show_gpr(child, gpr)); 98 FAIL_IF(validate_gpr(gpr, GPR_2)); 99 FAIL_IF(show_fpr(child, fpr)); 100 FAIL_IF(validate_fpr(fpr, FPR_2_REP)); 101 FAIL_IF(show_ckpt_fpr(child, fpr)); 102 FAIL_IF(validate_fpr(fpr, FPR_1_REP)); 103 FAIL_IF(show_ckpt_gpr(child, gpr)); 104 FAIL_IF(validate_gpr(gpr, GPR_1)); 105 FAIL_IF(write_ckpt_gpr(child, GPR_3)); 106 FAIL_IF(write_ckpt_fpr(child, FPR_3_REP)); 107 108 pptr[0] = 1; 109 FAIL_IF(stop_trace(child)); 110 111 return TEST_PASS; 112 } 113 114 int ptrace_tm_gpr(void) 115 { 116 pid_t pid; 117 int ret, status; 118 119 SKIP_IF(!have_htm()); 120 shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT); 121 pid = fork(); 122 if (pid < 0) { 123 perror("fork() failed"); 124 return TEST_FAIL; 125 } 126 if (pid == 0) 127 tm_gpr(); 128 129 if (pid) { 130 pptr = (unsigned long *)shmat(shm_id, NULL, 0); 131 132 while (!pptr[1]) 133 asm volatile("" : : : "memory"); 134 ret = trace_tm_gpr(pid); 135 if (ret) { 136 kill(pid, SIGTERM); 137 return TEST_FAIL; 138 } 139 140 shmdt((void *)pptr); 141 142 ret = wait(&status); 143 shmctl(shm_id, IPC_RMID, NULL); 144 if (ret != pid) { 145 printf("Child's exit status not captured\n"); 146 return TEST_FAIL; 147 } 148 149 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL : 150 TEST_PASS; 151 } 152 return TEST_PASS; 153 } 154 155 int main(int argc, char *argv[]) 156 { 157 return test_harness(ptrace_tm_gpr, "ptrace_tm_gpr"); 158 } 159
