diff options
Diffstat (limited to 'tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c')
| -rw-r--r-- | tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c new file mode 100644 index 000000000..f47174746 --- /dev/null +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-tar.c @@ -0,0 +1,174 @@ +/* + * Ptrace test for TAR, PPR, DSCR registers in the TM Suspend context + * + * Copyright (C) 2015 Anshuman Khandual, IBM Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include "ptrace.h" +#include "tm.h" +#include "ptrace-tar.h" + +int shm_id; +int *cptr, *pptr; + +__attribute__((used)) void wait_parent(void) +{ + cptr[2] = 1; + while (!cptr[1]) + asm volatile("" : : : "memory"); +} + +void tm_spd_tar(void) +{ + unsigned long result, texasr; + unsigned long regs[3]; + int ret; + + cptr = (int *)shmat(shm_id, NULL, 0); + +trans: + cptr[2] = 0; + asm __volatile__( + "li 4, %[tar_1];" + "mtspr %[sprn_tar], 4;" /* TAR_1 */ + "li 4, %[dscr_1];" + "mtspr %[sprn_dscr], 4;" /* DSCR_1 */ + "or 31,31,31;" /* PPR_1*/ + + "1: ;" + "tbegin.;" + "beq 2f;" + + "li 4, %[tar_2];" + "mtspr %[sprn_tar], 4;" /* TAR_2 */ + "li 4, %[dscr_2];" + "mtspr %[sprn_dscr], 4;" /* DSCR_2 */ + "or 1,1,1;" /* PPR_2 */ + + "tsuspend.;" + "li 4, %[tar_3];" + "mtspr %[sprn_tar], 4;" /* TAR_3 */ + "li 4, %[dscr_3];" + "mtspr %[sprn_dscr], 4;" /* DSCR_3 */ + "or 6,6,6;" /* PPR_3 */ + "bl wait_parent;" + "tresume.;" + + "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) + : [sprn_dscr]"i"(SPRN_DSCR), + [sprn_tar]"i"(SPRN_TAR), [sprn_ppr]"i"(SPRN_PPR), + [sprn_texasr]"i"(SPRN_TEXASR), [tar_1]"i"(TAR_1), + [dscr_1]"i"(DSCR_1), [tar_2]"i"(TAR_2), [dscr_2]"i"(DSCR_2), + [tar_3]"i"(TAR_3), [dscr_3]"i"(DSCR_3) + : "memory", "r0", "r1", "r3", "r4", "r5", "r6" + ); + + /* TM failed, analyse */ + if (result) { + if (!cptr[0]) + goto trans; + + regs[0] = mfspr(SPRN_TAR); + regs[1] = mfspr(SPRN_PPR); + regs[2] = mfspr(SPRN_DSCR); + + shmdt(&cptr); + printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n", + user_read, regs[0], regs[1], regs[2]); + + ret = validate_tar_registers(regs, TAR_4, PPR_4, DSCR_4); + if (ret) + exit(1); + exit(0); + } + shmdt(&cptr); + exit(1); +} + +int trace_tm_spd_tar(pid_t child) +{ + unsigned long regs[3]; + + FAIL_IF(start_trace(child)); + FAIL_IF(show_tar_registers(child, regs)); + printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n", + ptrace_read_running, regs[0], regs[1], regs[2]); + + FAIL_IF(validate_tar_registers(regs, TAR_3, PPR_3, DSCR_3)); + FAIL_IF(show_tm_checkpointed_state(child, regs)); + printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n", + ptrace_read_ckpt, regs[0], regs[1], regs[2]); + + FAIL_IF(validate_tar_registers(regs, TAR_1, PPR_1, DSCR_1)); + FAIL_IF(write_ckpt_tar_registers(child, TAR_4, PPR_4, DSCR_4)); + printf("%-30s TAR: %u PPR: %lx DSCR: %u\n", + ptrace_write_ckpt, TAR_4, PPR_4, DSCR_4); + + pptr[0] = 1; + pptr[1] = 1; + FAIL_IF(stop_trace(child)); + return TEST_PASS; +} + +int ptrace_tm_spd_tar(void) +{ + pid_t pid; + int ret, status; + + SKIP_IF(!have_htm()); + shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT); + pid = fork(); + if (pid == 0) + tm_spd_tar(); + + pptr = (int *)shmat(shm_id, NULL, 0); + pptr[0] = 0; + pptr[1] = 0; + + if (pid) { + while (!pptr[2]) + asm volatile("" : : : "memory"); + ret = trace_tm_spd_tar(pid); + if (ret) { + kill(pid, SIGTERM); + shmdt(&pptr); + shmctl(shm_id, IPC_RMID, NULL); + return TEST_FAIL; + } + + shmdt(&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_spd_tar, "ptrace_tm_spd_tar"); +} |