diff options
Diffstat (limited to 'tools/testing/selftests/arm64/signal/test_signals_utils.c')
| -rw-r--r-- | tools/testing/selftests/arm64/signal/test_signals_utils.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/tools/testing/selftests/arm64/signal/test_signals_utils.c b/tools/testing/selftests/arm64/signal/test_signals_utils.c index 76eaa505a789..2de6e5ed5e25 100644 --- a/tools/testing/selftests/arm64/signal/test_signals_utils.c +++ b/tools/testing/selftests/arm64/signal/test_signals_utils.c @@ -11,14 +11,19 @@ #include <linux/auxvec.h> #include <ucontext.h> +#include <asm/unistd.h> + #include <kselftest.h> #include "test_signals.h" #include "test_signals_utils.h" #include "testcases/testcases.h" + extern struct tdescr *current; +static int sig_copyctx = SIGTRAP; + static char const *const feats_names[FMAX_END] = { " SSBS ", }; @@ -154,6 +159,20 @@ static bool handle_signal_ok(struct tdescr *td, return true; } +static bool handle_signal_copyctx(struct tdescr *td, + siginfo_t *si, void *uc) +{ + /* Mangling PC to avoid loops on original BRK instr */ + ((ucontext_t *)uc)->uc_mcontext.pc += 4; + memcpy(td->live_uc, uc, td->live_sz); + ASSERT_GOOD_CONTEXT(td->live_uc); + td->live_uc_valid = 1; + fprintf(stderr, + "GOOD CONTEXT grabbed from sig_copyctx handler\n"); + + return true; +} + static void default_handler(int signum, siginfo_t *si, void *uc) { if (current->sig_unsupp && signum == current->sig_unsupp && @@ -165,6 +184,9 @@ static void default_handler(int signum, siginfo_t *si, void *uc) } else if (current->sig_ok && signum == current->sig_ok && handle_signal_ok(current, si, uc)) { fprintf(stderr, "Handled SIG_OK\n"); + } else if (signum == sig_copyctx && current->live_uc && + handle_signal_copyctx(current, si, uc)) { + fprintf(stderr, "Handled SIG_COPYCTX\n"); } else { if (signum == SIGALRM && current->timeout) { fprintf(stderr, "-- Timeout !\n"); @@ -219,6 +241,15 @@ static inline int default_trigger(struct tdescr *td) int test_init(struct tdescr *td) { + if (td->sig_trig == sig_copyctx) { + fprintf(stdout, + "Signal %d is RESERVED, cannot be used as a trigger. Aborting\n", + sig_copyctx); + return 0; + } + /* just in case */ + unblock_signal(sig_copyctx); + td->minsigstksz = getauxval(AT_MINSIGSTKSZ); if (!td->minsigstksz) td->minsigstksz = MINSIGSTKSZ; |