From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- .../powerpc/tm/tm-signal-context-chk-fpu.c | 92 ++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c (limited to 'tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c') diff --git a/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c b/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c new file mode 100644 index 000000000..c760debbd --- /dev/null +++ b/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c @@ -0,0 +1,92 @@ +/* + * Copyright 2016, Cyril Bur, IBM Corp. + * + * 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. + * + * + * Test the kernel's signal frame code. + * + * The kernel sets up two sets of ucontexts if the signal was to be + * delivered while the thread was in a transaction. + * Expected behaviour is that the checkpointed state is in the user + * context passed to the signal handler. The speculated state can be + * accessed with the uc_link pointer. + * + * The rationale for this is that if TM unaware code (which linked + * against TM libs) installs a signal handler it will not know of the + * speculative nature of the 'live' registers and may infer the wrong + * thing. + */ + +#include +#include +#include +#include + +#include + +#include "utils.h" +#include "tm.h" + +#define MAX_ATTEMPT 500000 + +#define NV_FPU_REGS 18 + +long tm_signal_self_context_load(pid_t pid, long *gprs, double *fps, vector int *vms, vector int *vss); + +/* Be sure there are 2x as many as there are NV FPU regs (2x18) */ +static double fps[] = { + 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, + -1,-2,-3,-4,-5,-6,-7,-8,-9,-10,-11,-12,-13,-14,-15,-16,-17,-18 +}; + +static sig_atomic_t fail; + +static void signal_usr1(int signum, siginfo_t *info, void *uc) +{ + int i; + ucontext_t *ucp = uc; + ucontext_t *tm_ucp = ucp->uc_link; + + for (i = 0; i < NV_FPU_REGS && !fail; i++) { + fail = (ucp->uc_mcontext.fp_regs[i + 14] != fps[i]); + fail |= (tm_ucp->uc_mcontext.fp_regs[i + 14] != fps[i + NV_FPU_REGS]); + if (fail) + printf("Failed on %d FP %g or %g\n", i, ucp->uc_mcontext.fp_regs[i + 14], tm_ucp->uc_mcontext.fp_regs[i + 14]); + } +} + +static int tm_signal_context_chk_fpu() +{ + struct sigaction act; + int i; + long rc; + pid_t pid = getpid(); + + SKIP_IF(!have_htm()); + + act.sa_sigaction = signal_usr1; + sigemptyset(&act.sa_mask); + act.sa_flags = SA_SIGINFO; + if (sigaction(SIGUSR1, &act, NULL) < 0) { + perror("sigaction sigusr1"); + exit(1); + } + + i = 0; + while (i < MAX_ATTEMPT && !fail) { + rc = tm_signal_self_context_load(pid, NULL, fps, NULL, NULL); + FAIL_IF(rc != pid); + i++; + } + + return fail; +} + +int main(void) +{ + return test_harness(tm_signal_context_chk_fpu, "tm_signal_context_chk_fpu"); +} -- cgit v1.2.3