* Fixes for SIGILL and SIGFPE of the s390x linux-user target
-----BEGIN PGP SIGNATURE----- iQJFBAABCAAvFiEEJ7iIR+7gJQEY8+q5LtnXdP5wLbUFAmEJRQ4RHHRodXRoQHJl ZGhhdC5jb20ACgkQLtnXdP5wLbU8XA/9H8uXt/S/I53oAJK9xL84cEm5qoRR6CNf gZAcczg/tIvPt+uRV7e39KyKhQRBCqR0mr+IP5tZ8dekB9qbj1k0nH6v6iSbhHs6 MxKQ9QQ/9bDrgLSlIN+zerLzxzowtdR7b9x/YcifThqUOqL6rE7JJPrzL6Yykk+y cI/MU5AsZNeSNkWIDEBTFXScB1059bUzMgza9Gdao5ROnCbDrpE+SwRih27wntNQ sLrlDdGZzO62jl681YqYAbLSZYbE9nbv/oJ8wLeD7b937qWfovdQgF5Esf9mPaME oEFUCqP0SJ9/6HimVnQg7owV28twqVmPhhgvXO7H+BVj7AjiI1AbNUStnKSvdhV2 8LVhzwxgf+ClVfetM4I60e6smMxTtpFHGDmsBQfOYkxnh1fMQVXyvmGztAvyc8MY LRbdV22nAkzKGdavTFlkj/GVVrf3h6F7hsdccPCBv8C6IEinhXO2E0k8Xznb6eky KUsNN2j0r36RbENpBbOCR4lmp+0jWVKYYcF2Do91ispTw1ta7DGvw4NrCFIbzQeo sejYElt6CRMfBuyZgg5zaQ8W9bxR4vrDpYfZ23Afj+JOaUoZuMctkXpvUyea6nhL 5yq88jo13rbpobpLJ/ngDwIQXues6ru3DC4aE1t4ec0wA7pPaSApyaadQcZceEAE UTCUloOucAE= =1YMM -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/thuth-gitlab/tags/pull-request-2021-08-03' into staging * Fixes for SIGILL and SIGFPE of the s390x linux-user target # gpg: Signature made Tue 03 Aug 2021 14:30:54 BST # gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5 # gpg: issuer "thuth@redhat.com" # gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full] # gpg: aka "Thomas Huth <thuth@redhat.com>" [full] # gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full] # gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown] # Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5 * remotes/thuth-gitlab/tags/pull-request-2021-08-03: tests/tcg: Test that compare-and-trap raises SIGFPE linux-user/s390x: signal with SIGFPE on compare-and-trap target/s390x: Fix SIGILL and SIGFPE psw.addr reporting Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
commit
cb2f4b8750
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@ -25,6 +25,35 @@
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/* s390x masks the fault address it reports in si_addr for SIGSEGV and SIGBUS */
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#define S390X_FAIL_ADDR_MASK -4096LL
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static int get_pgm_data_si_code(int dxc_code)
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{
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switch (dxc_code) {
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/* Non-simulated IEEE exceptions */
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case 0x80:
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return TARGET_FPE_FLTINV;
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case 0x40:
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return TARGET_FPE_FLTDIV;
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case 0x20:
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case 0x28:
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case 0x2c:
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return TARGET_FPE_FLTOVF;
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case 0x10:
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case 0x18:
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case 0x1c:
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return TARGET_FPE_FLTUND;
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case 0x08:
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case 0x0c:
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return TARGET_FPE_FLTRES;
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}
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/*
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* Non-IEEE and simulated IEEE:
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* Includes compare-and-trap, quantum exception, etc.
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* Simulated IEEE are included here to match current
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* s390x linux kernel.
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*/
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return 0;
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}
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void cpu_loop(CPUS390XState *env)
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{
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CPUState *cs = env_cpu(env);
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@ -64,7 +93,13 @@ void cpu_loop(CPUS390XState *env)
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case EXCP_DEBUG:
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sig = TARGET_SIGTRAP;
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n = TARGET_TRAP_BRKPT;
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goto do_signal_pc;
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/*
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* For SIGTRAP the PSW must point after the instruction, which it
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* already does thanks to s390x_tr_tb_stop(). si_addr doesn't need
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* to be filled.
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*/
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addr = 0;
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goto do_signal;
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case EXCP_PGM:
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n = env->int_pgm_code;
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switch (n) {
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@ -100,29 +135,14 @@ void cpu_loop(CPUS390XState *env)
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case PGM_DATA:
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n = (env->fpc >> 8) & 0xff;
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if (n == 0xff) {
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/* compare-and-trap */
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if (n == 0) {
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goto do_sigill_opn;
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} else {
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/* An IEEE exception, simulated or otherwise. */
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if (n & 0x80) {
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n = TARGET_FPE_FLTINV;
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} else if (n & 0x40) {
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n = TARGET_FPE_FLTDIV;
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} else if (n & 0x20) {
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n = TARGET_FPE_FLTOVF;
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} else if (n & 0x10) {
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n = TARGET_FPE_FLTUND;
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} else if (n & 0x08) {
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n = TARGET_FPE_FLTRES;
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} else {
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/* ??? Quantum exception; BFP, DFP error. */
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goto do_sigill_opn;
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}
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sig = TARGET_SIGFPE;
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goto do_signal_pc;
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}
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sig = TARGET_SIGFPE;
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n = get_pgm_data_si_code(n);
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goto do_signal_pc;
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default:
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fprintf(stderr, "Unhandled program exception: %#x\n", n);
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cpu_dump_state(cs, stderr, 0);
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@ -132,6 +152,10 @@ void cpu_loop(CPUS390XState *env)
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do_signal_pc:
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addr = env->psw.addr;
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/*
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* For SIGILL and SIGFPE the PSW must point after the instruction.
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*/
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env->psw.addr += env->int_pgm_ilen;
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do_signal:
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info.si_signo = sig;
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info.si_errno = 0;
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@ -8,4 +8,4 @@ TESTS+=exrl-trtr
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TESTS+=pack
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TESTS+=mvo
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TESTS+=mvc
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TESTS+=trap
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@ -0,0 +1,102 @@
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/*
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* Copyright 2021 IBM Corp.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <signal.h>
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static void error1(const char *filename, int line, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "%s:%d: ", filename, line);
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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exit(1);
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}
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static int __chk_error(const char *filename, int line, int ret)
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{
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if (ret < 0) {
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error1(filename, line, "%m (ret=%d, errno=%d/%s)",
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ret, errno, strerror(errno));
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}
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return ret;
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}
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#define error(fmt, ...) error1(__FILE__, __LINE__, fmt, ## __VA_ARGS__)
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#define chk_error(ret) __chk_error(__FILE__, __LINE__, (ret))
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int sigfpe_count;
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int sigill_count;
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static void sig_handler(int sig, siginfo_t *si, void *puc)
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{
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if (sig == SIGFPE) {
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if (si->si_code != 0) {
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error("unexpected si_code: 0x%x != 0", si->si_code);
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}
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++sigfpe_count;
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return;
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}
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if (sig == SIGILL) {
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++sigill_count;
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return;
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}
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error("unexpected signal 0x%x\n", sig);
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}
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int main(int argc, char **argv)
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{
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sigfpe_count = sigill_count = 0;
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struct sigaction act;
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/* Set up SIG handler */
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act.sa_sigaction = sig_handler;
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sigemptyset(&act.sa_mask);
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act.sa_flags = SA_SIGINFO;
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chk_error(sigaction(SIGFPE, &act, NULL));
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chk_error(sigaction(SIGILL, &act, NULL));
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uint64_t z = 0x0ull;
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uint64_t lz = 0xffffffffffffffffull;
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asm volatile (
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"lg %%r13,%[lz]\n"
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"cgitne %%r13,0\n" /* SIGFPE */
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"lg %%r13,%[z]\n"
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"cgitne %%r13,0\n" /* no trap */
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"nopr\n"
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"lg %%r13,%[lz]\n"
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"citne %%r13,0\n" /* SIGFPE */
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"lg %%r13,%[z]\n"
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"citne %%r13,0\n" /* no trap */
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"nopr\n"
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:
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: [z] "m" (z), [lz] "m" (lz)
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: "memory", "r13");
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if (sigfpe_count != 2) {
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error("unexpected SIGFPE count: %d != 2", sigfpe_count);
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}
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if (sigill_count != 0) {
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error("unexpected SIGILL count: %d != 0", sigill_count);
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}
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printf("PASS\n");
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return 0;
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}
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