1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Ptrace test for TAR, PPR, DSCR registers
5 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
8 #include "ptrace-tar.h"
10 /* Tracer and Tracee Shared Data */
20 cptr = (int *)shmat(shm_id, NULL, 0);
21 printf("%-30s TAR: %u PPR: %lx DSCR: %u\n",
22 user_write, TAR_1, PPR_1, DSCR_1);
24 mtspr(SPRN_TAR, TAR_1);
25 mtspr(SPRN_PPR, PPR_1);
26 mtspr(SPRN_DSCR, DSCR_1);
32 asm volatile("" : : : "memory");
34 reg[0] = mfspr(SPRN_TAR);
35 reg[1] = mfspr(SPRN_PPR);
36 reg[2] = mfspr(SPRN_DSCR);
38 printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
39 user_read, reg[0], reg[1], reg[2]);
41 /* Unblock the parent now */
45 ret = validate_tar_registers(reg, TAR_2, PPR_2, DSCR_2);
51 int trace_tar(pid_t child)
55 FAIL_IF(start_trace(child));
56 FAIL_IF(show_tar_registers(child, reg));
57 printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n",
58 ptrace_read_running, reg[0], reg[1], reg[2]);
60 FAIL_IF(validate_tar_registers(reg, TAR_1, PPR_1, DSCR_1));
61 FAIL_IF(stop_trace(child));
65 int trace_tar_write(pid_t child)
67 FAIL_IF(start_trace(child));
68 FAIL_IF(write_tar_registers(child, TAR_2, PPR_2, DSCR_2));
69 printf("%-30s TAR: %u PPR: %lx DSCR: %u\n",
70 ptrace_write_running, TAR_2, PPR_2, DSCR_2);
72 FAIL_IF(stop_trace(child));
81 // TAR was added in v2.07
82 SKIP_IF_MSG(!have_hwcap2(PPC_FEATURE2_ARCH_2_07), "TAR requires ISA 2.07 compatible hardware");
84 shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
87 perror("fork() failed");
95 pptr = (int *)shmat(shm_id, NULL, 0);
100 asm volatile("" : : : "memory");
101 ret = trace_tar(pid);
105 ret = trace_tar_write(pid);
109 /* Unblock the child now */
114 asm volatile("" : : : "memory");
119 shmctl(shm_id, IPC_RMID, NULL);
121 printf("Child's exit status not captured\n");
125 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
131 int main(int argc, char *argv[])
133 return test_harness(ptrace_tar, "ptrace_tar");