1 /* 2 * Ptrace test for GPR/FPR registers 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 "reg.h" 14 15 /* Tracer and Tracee Shared Data */ 16 int shm_id; 17 int *cptr, *pptr; 18 19 float a = FPR_1; 20 float b = FPR_2; 21 float c = FPR_3; 22 23 void gpr(void) 24 { 25 unsigned long gpr_buf[18]; 26 float fpr_buf[32]; 27 28 cptr = (int *)shmat(shm_id, NULL, 0); 29 30 asm __volatile__( 31 ASM_LOAD_GPR_IMMED(gpr_1) 32 ASM_LOAD_FPR_SINGLE_PRECISION(flt_1) 33 : 34 : [gpr_1]"i"(GPR_1), [flt_1] "r" (&a) 35 : "memory", "r6", "r7", "r8", "r9", "r10", 36 "r11", "r12", "r13", "r14", "r15", "r16", "r17", 37 "r18", "r19", "r20", "r21", "r22", "r23", "r24", 38 "r25", "r26", "r27", "r28", "r29", "r30", "r31" 39 ); 40 41 cptr[1] = 1; 42 43 while (!cptr[0]) 44 asm volatile("" : : : "memory"); 45 46 shmdt((void *)cptr); 47 store_gpr(gpr_buf); 48 store_fpr_single_precision(fpr_buf); 49 50 if (validate_gpr(gpr_buf, GPR_3)) 51 exit(1); 52 53 if (validate_fpr_float(fpr_buf, c)) 54 exit(1); 55 56 exit(0); 57 } 58 59 int trace_gpr(pid_t child) 60 { 61 unsigned long gpr[18]; 62 unsigned long fpr[32]; 63 64 FAIL_IF(start_trace(child)); 65 FAIL_IF(show_gpr(child, gpr)); 66 FAIL_IF(validate_gpr(gpr, GPR_1)); 67 FAIL_IF(show_fpr(child, fpr)); 68 FAIL_IF(validate_fpr(fpr, FPR_1_REP)); 69 FAIL_IF(write_gpr(child, GPR_3)); 70 FAIL_IF(write_fpr(child, FPR_3_REP)); 71 FAIL_IF(stop_trace(child)); 72 73 return TEST_PASS; 74 } 75 76 int ptrace_gpr(void) 77 { 78 pid_t pid; 79 int ret, status; 80 81 shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT); 82 pid = fork(); 83 if (pid < 0) { 84 perror("fork() failed"); 85 return TEST_FAIL; 86 } 87 if (pid == 0) 88 gpr(); 89 90 if (pid) { 91 pptr = (int *)shmat(shm_id, NULL, 0); 92 while (!pptr[1]) 93 asm volatile("" : : : "memory"); 94 95 ret = trace_gpr(pid); 96 if (ret) { 97 kill(pid, SIGTERM); 98 shmdt((void *)pptr); 99 shmctl(shm_id, IPC_RMID, NULL); 100 return TEST_FAIL; 101 } 102 103 pptr[0] = 1; 104 shmdt((void *)pptr); 105 106 ret = wait(&status); 107 shmctl(shm_id, IPC_RMID, NULL); 108 if (ret != pid) { 109 printf("Child's exit status not captured\n"); 110 return TEST_FAIL; 111 } 112 113 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL : 114 TEST_PASS; 115 } 116 117 return TEST_PASS; 118 } 119 120 int main(int argc, char *argv[]) 121 { 122 return test_harness(ptrace_gpr, "ptrace_gpr"); 123 } 124
