summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c
blob: 82f7bdc2e5e6f4fb9dc384ca39c2d9a7479e7938 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Ptrace test for GPR/FPR registers in TM context
 *
 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
 */
#include "ptrace.h"
#include "ptrace-gpr.h"
#include "tm.h"

/* Tracer and Tracee Shared Data */
int shm_id;
unsigned long *cptr, *pptr;

float a = FPR_1;
float b = FPR_2;
float c = FPR_3;

void tm_gpr(void)
{
	unsigned long gpr_buf[18];
	unsigned long result, texasr;
	float fpr_buf[32];

	printf("Starting the child\n");
	cptr = (unsigned long *)shmat(shm_id, NULL, 0);

trans:
	cptr[1] = 0;
	asm __volatile__(
		ASM_LOAD_GPR_IMMED(gpr_1)
		ASM_LOAD_FPR_SINGLE_PRECISION(flt_1)
		"1: ;"
		"tbegin.;"
		"beq 2f;"
		ASM_LOAD_GPR_IMMED(gpr_2)
		ASM_LOAD_FPR_SINGLE_PRECISION(flt_2)
		"tsuspend.;"
		"li 7, 1;"
		"stw 7, 0(%[cptr1]);"
		"tresume.;"
		"b .;"

		"tend.;"
		"li 0, 0;"
		"ori %[res], 0, 0;"
		"b 3f;"

		/* Transaction abort handler */
		"2: ;"
		"li 0, 1;"
		"ori %[res], 0, 0;"
		"mfspr %[texasr], %[sprn_texasr];"

		"3: ;"
		: [res] "=r" (result), [texasr] "=r" (texasr)
		: [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2),
		[sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "b" (&a),
		[flt_2] "b" (&b), [cptr1] "b" (&cptr[1])
		: "memory", "r7", "r8", "r9", "r10",
		"r11", "r12", "r13", "r14", "r15", "r16",
		"r17", "r18", "r19", "r20", "r21", "r22",
		"r23", "r24", "r25", "r26", "r27", "r28",
		"r29", "r30", "r31"
		);

	if (result) {
		if (!cptr[0])
			goto trans;

		shmdt((void *)cptr);
		store_gpr(gpr_buf);
		store_fpr_single_precision(fpr_buf);

		if (validate_gpr(gpr_buf, GPR_3))
			exit(1);

		if (validate_fpr_float(fpr_buf, c))
			exit(1);

		exit(0);
	}
	shmdt((void *)cptr);
	exit(1);
}

int trace_tm_gpr(pid_t child)
{
	unsigned long gpr[18];
	unsigned long fpr[32];

	FAIL_IF(start_trace(child));
	FAIL_IF(show_gpr(child, gpr));
	FAIL_IF(validate_gpr(gpr, GPR_2));
	FAIL_IF(show_fpr(child, fpr));
	FAIL_IF(validate_fpr(fpr, FPR_2_REP));
	FAIL_IF(show_ckpt_fpr(child, fpr));
	FAIL_IF(validate_fpr(fpr, FPR_1_REP));
	FAIL_IF(show_ckpt_gpr(child, gpr));
	FAIL_IF(validate_gpr(gpr, GPR_1));
	FAIL_IF(write_ckpt_gpr(child, GPR_3));
	FAIL_IF(write_ckpt_fpr(child, FPR_3_REP));

	pptr[0] = 1;
	FAIL_IF(stop_trace(child));

	return TEST_PASS;
}

int ptrace_tm_gpr(void)
{
	pid_t pid;
	int ret, status;

	SKIP_IF(!have_htm());
	shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
	pid = fork();
	if (pid < 0) {
		perror("fork() failed");
		return TEST_FAIL;
	}
	if (pid == 0)
		tm_gpr();

	if (pid) {
		pptr = (unsigned long *)shmat(shm_id, NULL, 0);

		while (!pptr[1])
			asm volatile("" : : : "memory");
		ret = trace_tm_gpr(pid);
		if (ret) {
			kill(pid, SIGTERM);
			return TEST_FAIL;
		}

		shmdt((void *)pptr);

		ret = wait(&status);
		shmctl(shm_id, IPC_RMID, NULL);
		if (ret != pid) {
			printf("Child's exit status not captured\n");
			return TEST_FAIL;
		}

		return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
			TEST_PASS;
	}
	return TEST_PASS;
}

int main(int argc, char *argv[])
{
	return test_harness(ptrace_tm_gpr, "ptrace_tm_gpr");
}