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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 | } |