1 /*
2 * Ptrace test for GPR/FPR registers in TM Suspend 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 int *cptr, *pptr;
18
19 float a = FPR_1;
20 float b = FPR_2;
21 float c = FPR_3;
22 float d = FPR_4;
23
24 __attribute__((used)) void wait_parent(void)
25 {
26 cptr[2] = 1;
27 while (!cptr[1])
28 asm volatile("" : : : "memory");
29 }
30
31 void tm_spd_gpr(void)
32 {
33 unsigned long gpr_buf[18];
34 unsigned long result, texasr;
35 float fpr_buf[32];
36
37 cptr = (int *)shmat(shm_id, NULL, 0);
38
39 trans:
40 cptr[2] = 0;
41 asm __volatile__(
42 ASM_LOAD_GPR_IMMED(gpr_1)
43 ASM_LOAD_FPR_SINGLE_PRECISION(flt_1)
44
45 "1: ;"
46 "tbegin.;"
47 "beq 2f;"
48
49 ASM_LOAD_GPR_IMMED(gpr_2)
50 "tsuspend.;"
51 ASM_LOAD_GPR_IMMED(gpr_4)
52 ASM_LOAD_FPR_SINGLE_PRECISION(flt_4)
53
54 "bl wait_parent;"
55 "tresume.;"
56 "tend.;"
57 "li 0, 0;"
58 "ori %[res], 0, 0;"
59 "b 3f;"
60
61 /* Transaction abort handler */
62 "2: ;"
63 "li 0, 1;"
64 "ori %[res], 0, 0;"
65 "mfspr %[texasr], %[sprn_texasr];"
66
67 "3: ;"
68 : [res] "=r" (result), [texasr] "=r" (texasr)
69 : [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2), [gpr_4]"i"(GPR_4),
70 [sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "r" (&a),
71 [flt_2] "r" (&b), [flt_4] "r" (&d)
72 : "memory", "r5", "r6", "r7",
73 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
74 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
75 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
76 );
77
78 if (result) {
79 if (!cptr[0])
80 goto trans;
81
82 shmdt((void *)cptr);
83 store_gpr(gpr_buf);
84 store_fpr_single_precision(fpr_buf);
85
86 if (validate_gpr(gpr_buf, GPR_3))
87 exit(1);
88
89 if (validate_fpr_float(fpr_buf, c))
90 exit(1);
91 exit(0);
92 }
93 shmdt((void *)cptr);
94 exit(1);
95 }
96
97 int trace_tm_spd_gpr(pid_t child)
98 {
99 unsigned long gpr[18];
100 unsigned long fpr[32];
101
102 FAIL_IF(start_trace(child));
103 FAIL_IF(show_gpr(child, gpr));
104 FAIL_IF(validate_gpr(gpr, GPR_4));
105 FAIL_IF(show_fpr(child, fpr));
106 FAIL_IF(validate_fpr(fpr, FPR_4_REP));
107 FAIL_IF(show_ckpt_fpr(child, fpr));
108 FAIL_IF(validate_fpr(fpr, FPR_1_REP));
109 FAIL_IF(show_ckpt_gpr(child, gpr));
110 FAIL_IF(validate_gpr(gpr, GPR_1));
111 FAIL_IF(write_ckpt_gpr(child, GPR_3));
112 FAIL_IF(write_ckpt_fpr(child, FPR_3_REP));
113
114 pptr[0] = 1;
115 pptr[1] = 1;
116 FAIL_IF(stop_trace(child));
117 return TEST_PASS;
118 }
119
120 int ptrace_tm_spd_gpr(void)
121 {
122 pid_t pid;
123 int ret, status;
124
125 SKIP_IF(!have_htm());
126 shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
127 pid = fork();
128 if (pid < 0) {
129 perror("fork() failed");
130 return TEST_FAIL;
131 }
132
133 if (pid == 0)
134 tm_spd_gpr();
135
136 if (pid) {
137 pptr = (int *)shmat(shm_id, NULL, 0);
138 pptr[0] = 0;
139 pptr[1] = 0;
140
141 while (!pptr[2])
142 asm volatile("" : : : "memory");
143 ret = trace_tm_spd_gpr(pid);
144 if (ret) {
145 kill(pid, SIGTERM);
146 shmdt((void *)pptr);
147 shmctl(shm_id, IPC_RMID, NULL);
148 return TEST_FAIL;
149 }
150
151 shmdt((void *)pptr);
152
153 ret = wait(&status);
154 shmctl(shm_id, IPC_RMID, NULL);
155 if (ret != pid) {
156 printf("Child's exit status not captured\n");
157 return TEST_FAIL;
158 }
159
160 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
161 TEST_PASS;
162 }
163 return TEST_PASS;
164 }
165
166 int main(int argc, char *argv[])
167 {
168 return test_harness(ptrace_tm_spd_gpr, "ptrace_tm_spd_gpr");
169 }
170
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