/* * Ptrace test for TAR, PPR, DSCR registers in the TM 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; unsigned long *cptr, *pptr; void tm_tar(void) { unsigned long result, texasr; unsigned long regs[3]; int ret; cptr = (unsigned long *)shmat(shm_id, NULL, 0); trans: cptr[1] = 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 0, 1;" "stw 0, 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) : [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), [cptr1] "r" (&cptr[1]) : "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_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_2, PPR_2, DSCR_2)); 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; FAIL_IF(stop_trace(child)); return TEST_PASS; } int ptrace_tm_tar(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) tm_tar(); pptr = (unsigned long *)shmat(shm_id, NULL, 0); pptr[0] = 0; if (pid) { while (!pptr[1]) asm volatile("" : : : "memory"); ret = trace_tm_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_tar, "ptrace_tm_tar"); } mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-12 21:58:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-12 21:58:13 -0800
commite7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba (patch)
treef63906f41699c8e38af9d12b063e2ceab0286ef2 /tools/perf/trace/beauty
parente34bac726d27056081d0250c0e173e4b155aa340 (diff)
parent868c97a846a73e937d835b09b8c885a69df50ec8 (diff)
Merge tag 'docs-4.10' of git://git.lwn.net/linuxHEADmaster
Pull documentation update from Jonathan Corbet: "These are the documentation changes for 4.10. It's another busy cycle for the docs tree, as the sphinx conversion continues. Highlights include: - Further work on PDF output, which remains a bit of a pain but should be more solid now. - Five more DocBook template files converted to Sphinx. Only 27 to go... Lots of plain-text files have also been converted and integrated. - Images in binary formats have been replaced with more source-friendly versions. - Various bits of organizational work, including the renaming of various files discussed at the kernel summit. - New documentation for the device_link mechanism. ... and, of course, lots of typo fixes and small updates" * tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits) dma-buf: Extract dma-buf.rst Update Documentation/00-INDEX docs: 00-INDEX: document directories/files with no docs docs: 00-INDEX: remove non-existing entries docs: 00-INDEX: add missing entries for documentation files/dirs docs: 00-INDEX: consolidate process/ and admin-guide/ description scripts: add a script to check if Documentation/00-INDEX is sane Docs: change sh -> awk in REPORTING-BUGS Documentation/core-api/device_link: Add initial documentation core-api: remove an unexpected unident ppc/idle: Add documentation for powersave=off Doc: Correct typo, "Introdution" => "Introduction" Documentation/atomic_ops.txt: convert to ReST markup Documentation/local_ops.txt: convert to ReST markup Documentation/assoc_array.txt: convert to ReST markup docs-rst: parse-headers.pl: cleanup the documentation docs-rst: fix media cleandocs target docs-rst: media/Makefile: reorganize the rules docs-rst: media: build SVG from graphviz files docs-rst: replace bayer.png by a SVG image ...
Diffstat (limited to 'tools/perf/trace/beauty')