1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Ptrace test for GPR/FPR registers
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun #include "ptrace.h"
8*4882a593Smuzhiyun #include "ptrace-gpr.h"
9*4882a593Smuzhiyun #include "reg.h"
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun /* Tracer and Tracee Shared Data */
12*4882a593Smuzhiyun int shm_id;
13*4882a593Smuzhiyun int *cptr, *pptr;
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun float a = FPR_1;
16*4882a593Smuzhiyun float b = FPR_2;
17*4882a593Smuzhiyun float c = FPR_3;
18*4882a593Smuzhiyun
gpr(void)19*4882a593Smuzhiyun void gpr(void)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun unsigned long gpr_buf[18];
22*4882a593Smuzhiyun float fpr_buf[32];
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun cptr = (int *)shmat(shm_id, NULL, 0);
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun asm __volatile__(
27*4882a593Smuzhiyun ASM_LOAD_GPR_IMMED(gpr_1)
28*4882a593Smuzhiyun ASM_LOAD_FPR_SINGLE_PRECISION(flt_1)
29*4882a593Smuzhiyun :
30*4882a593Smuzhiyun : [gpr_1]"i"(GPR_1), [flt_1] "b" (&a)
31*4882a593Smuzhiyun : "memory", "r6", "r7", "r8", "r9", "r10",
32*4882a593Smuzhiyun "r11", "r12", "r13", "r14", "r15", "r16", "r17",
33*4882a593Smuzhiyun "r18", "r19", "r20", "r21", "r22", "r23", "r24",
34*4882a593Smuzhiyun "r25", "r26", "r27", "r28", "r29", "r30", "r31"
35*4882a593Smuzhiyun );
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun cptr[1] = 1;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun while (!cptr[0])
40*4882a593Smuzhiyun asm volatile("" : : : "memory");
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun shmdt((void *)cptr);
43*4882a593Smuzhiyun store_gpr(gpr_buf);
44*4882a593Smuzhiyun store_fpr_single_precision(fpr_buf);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun if (validate_gpr(gpr_buf, GPR_3))
47*4882a593Smuzhiyun exit(1);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (validate_fpr_float(fpr_buf, c))
50*4882a593Smuzhiyun exit(1);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun exit(0);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
trace_gpr(pid_t child)55*4882a593Smuzhiyun int trace_gpr(pid_t child)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun unsigned long gpr[18];
58*4882a593Smuzhiyun unsigned long fpr[32];
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun FAIL_IF(start_trace(child));
61*4882a593Smuzhiyun FAIL_IF(show_gpr(child, gpr));
62*4882a593Smuzhiyun FAIL_IF(validate_gpr(gpr, GPR_1));
63*4882a593Smuzhiyun FAIL_IF(show_fpr(child, fpr));
64*4882a593Smuzhiyun FAIL_IF(validate_fpr(fpr, FPR_1_REP));
65*4882a593Smuzhiyun FAIL_IF(write_gpr(child, GPR_3));
66*4882a593Smuzhiyun FAIL_IF(write_fpr(child, FPR_3_REP));
67*4882a593Smuzhiyun FAIL_IF(stop_trace(child));
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun return TEST_PASS;
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
ptrace_gpr(void)72*4882a593Smuzhiyun int ptrace_gpr(void)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun pid_t pid;
75*4882a593Smuzhiyun int ret, status;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
78*4882a593Smuzhiyun pid = fork();
79*4882a593Smuzhiyun if (pid < 0) {
80*4882a593Smuzhiyun perror("fork() failed");
81*4882a593Smuzhiyun return TEST_FAIL;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun if (pid == 0)
84*4882a593Smuzhiyun gpr();
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun if (pid) {
87*4882a593Smuzhiyun pptr = (int *)shmat(shm_id, NULL, 0);
88*4882a593Smuzhiyun while (!pptr[1])
89*4882a593Smuzhiyun asm volatile("" : : : "memory");
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun ret = trace_gpr(pid);
92*4882a593Smuzhiyun if (ret) {
93*4882a593Smuzhiyun kill(pid, SIGTERM);
94*4882a593Smuzhiyun shmdt((void *)pptr);
95*4882a593Smuzhiyun shmctl(shm_id, IPC_RMID, NULL);
96*4882a593Smuzhiyun return TEST_FAIL;
97*4882a593Smuzhiyun }
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun pptr[0] = 1;
100*4882a593Smuzhiyun shmdt((void *)pptr);
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun ret = wait(&status);
103*4882a593Smuzhiyun shmctl(shm_id, IPC_RMID, NULL);
104*4882a593Smuzhiyun if (ret != pid) {
105*4882a593Smuzhiyun printf("Child's exit status not captured\n");
106*4882a593Smuzhiyun return TEST_FAIL;
107*4882a593Smuzhiyun }
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
110*4882a593Smuzhiyun TEST_PASS;
111*4882a593Smuzhiyun }
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun return TEST_PASS;
114*4882a593Smuzhiyun }
115*4882a593Smuzhiyun
main(int argc,char * argv[])116*4882a593Smuzhiyun int main(int argc, char *argv[])
117*4882a593Smuzhiyun {
118*4882a593Smuzhiyun return test_harness(ptrace_gpr, "ptrace_gpr");
119*4882a593Smuzhiyun }
120