From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PATCH v3 45/66] tests/tcg/multiarch: Add sigbus.c
Date: Wed, 18 Aug 2021 09:18:59 -1000 [thread overview]
Message-ID: <20210818191920.390759-46-richard.henderson@linaro.org> (raw)
In-Reply-To: <20210818191920.390759-1-richard.henderson@linaro.org>
A mostly generic test for unaligned access raising SIGBUS.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tests/tcg/multiarch/sigbus.c | 68 ++++++++++++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
create mode 100644 tests/tcg/multiarch/sigbus.c
diff --git a/tests/tcg/multiarch/sigbus.c b/tests/tcg/multiarch/sigbus.c
new file mode 100644
index 0000000000..8134c5fd56
--- /dev/null
+++ b/tests/tcg/multiarch/sigbus.c
@@ -0,0 +1,68 @@
+#define _GNU_SOURCE 1
+
+#include <assert.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <endian.h>
+
+
+unsigned long long x = 0x8877665544332211ull;
+void * volatile p = (void *)&x + 1;
+
+void sigbus(int sig, siginfo_t *info, void *uc)
+{
+ assert(sig == SIGBUS);
+ assert(info->si_signo == SIGBUS);
+#ifdef BUS_ADRALN
+ assert(info->si_code == BUS_ADRALN);
+#endif
+ assert(info->si_addr == p);
+ exit(EXIT_SUCCESS);
+}
+
+int main()
+{
+ struct sigaction sa = {
+ .sa_sigaction = sigbus,
+ .sa_flags = SA_SIGINFO
+ };
+ int allow_fail = 0;
+ int tmp;
+
+ tmp = sigaction(SIGBUS, &sa, NULL);
+ assert(tmp == 0);
+
+ /*
+ * Select an operation that's likely to enforce alignment.
+ * On many guests that support unaligned accesses by default,
+ * this is often an atomic operation.
+ */
+#if defined(__aarch64__)
+ asm volatile("ldxr %w0,[%1]" : "=r"(tmp) : "r"(p) : "memory");
+#elif defined(__alpha__)
+ asm volatile("ldl_l %0,0(%1)" : "=r"(tmp) : "r"(p) : "memory");
+#elif defined(__arm__)
+ asm volatile("ldrex %0,[%1]" : "=r"(tmp) : "r"(p) : "memory");
+#elif defined(__powerpc__)
+ asm volatile("lwarx %0,0,%1" : "=r"(tmp) : "r"(p) : "memory");
+#elif defined(__riscv_atomic)
+ asm volatile("lr.w %0,(%1)" : "=r"(tmp) : "r"(p) : "memory");
+#else
+ /* No insn known to fault unaligned -- try for a straight load. */
+ allow_fail = 1;
+ tmp = *(volatile int *)p;
+#endif
+
+ assert(allow_fail);
+
+ /*
+ * We didn't see a signal.
+ * We might as well validate the unaligned load worked.
+ */
+ if (BYTE_ORDER == LITTLE_ENDIAN) {
+ assert(tmp == 0x55443322);
+ } else {
+ assert(tmp == 0x77665544);
+ }
+ return EXIT_SUCCESS;
+}
--
2.25.1
next prev parent reply other threads:[~2021-08-18 19:38 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-18 19:18 [PATCH v3 00/66] Unaligned access for user-only Richard Henderson
2021-08-18 19:18 ` [PATCH v3 01/66] util: Suppress -Wstringop-overflow in qemu_thread_start Richard Henderson
2021-08-19 15:13 ` Peter Maydell
2021-08-18 19:18 ` [PATCH v3 02/66] hw/core: Make do_unaligned_access noreturn Richard Henderson
2021-08-19 6:15 ` Alistair Francis
2021-08-18 19:18 ` [PATCH v3 03/66] hw/core: Make do_unaligned_access available to user-only Richard Henderson
2021-08-18 19:18 ` [PATCH v3 04/66] target/alpha: Implement do_unaligned_access for user-only Richard Henderson
2021-08-18 19:18 ` [PATCH v3 05/66] target/arm: " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 06/66] target/hppa: " Richard Henderson
2021-08-19 15:32 ` Peter Maydell
2021-08-18 19:18 ` [PATCH v3 07/66] target/microblaze: Do not set MO_ALIGN " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 08/66] target/mips: Implement do_unaligned_access " Richard Henderson
2021-08-19 15:34 ` Peter Maydell
2021-08-18 19:18 ` [PATCH v3 09/66] target/ppc: Move SPR_DSISR setting to powerpc_excp Richard Henderson
2021-08-19 15:39 ` Peter Maydell
2021-08-19 19:13 ` Richard Henderson
2021-08-18 19:18 ` [PATCH v3 10/66] target/ppc: Set fault address in ppc_cpu_do_unaligned_access Richard Henderson
2021-08-19 15:41 ` Peter Maydell
2021-08-18 19:18 ` [PATCH v3 11/66] target/ppc: Implement do_unaligned_access for user-only Richard Henderson
2021-08-19 15:44 ` Peter Maydell
2021-08-18 19:18 ` [PATCH v3 12/66] target/riscv: " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 13/66] target/s390x: " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 14/66] target/sh4: Set fault address in superh_cpu_do_unaligned_access Richard Henderson
2021-08-18 19:18 ` [PATCH v3 15/66] target/sh4: Implement do_unaligned_access for user-only Richard Henderson
2021-08-19 15:46 ` Peter Maydell
2021-08-19 19:21 ` Richard Henderson
2021-08-18 19:18 ` [PATCH v3 16/66] target/sparc: Remove DEBUG_UNALIGNED Richard Henderson
2021-08-18 19:18 ` [PATCH v3 17/66] target/sparc: Split out build_sfsr Richard Henderson
2021-08-18 19:18 ` [PATCH v3 18/66] target/sparc: Set fault address in sparc_cpu_do_unaligned_access Richard Henderson
2021-08-18 19:18 ` [PATCH v3 19/66] target/sparc: Implement do_unaligned_access for user-only Richard Henderson
2021-08-18 19:18 ` [PATCH v3 20/66] target/xtensa: " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 21/66] accel/tcg: Report unaligned atomics " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 22/66] accel/tcg: Drop signness in tracing in cputlb.c Richard Henderson
2021-08-18 21:14 ` Philippe Mathieu-Daudé
2021-08-18 19:18 ` [PATCH v3 23/66] tcg: Expand MO_SIZE to 3 bits Richard Henderson
2021-08-19 6:17 ` Alistair Francis
2021-08-18 19:18 ` [PATCH v3 24/66] tcg: Rename TCGMemOpIdx to MemOpIdx Richard Henderson
2021-08-19 6:17 ` Alistair Francis
2021-08-18 19:18 ` [PATCH v3 25/66] tcg: Split out MemOpIdx to exec/memopidx.h Richard Henderson
2021-08-18 19:18 ` [PATCH v3 26/66] trace/mem: Pass MemOpIdx to trace_mem_get_info Richard Henderson
2021-08-19 15:49 ` Peter Maydell
2021-08-18 19:18 ` [PATCH v3 27/66] accel/tcg: Pass MemOpIdx to atomic_trace_*_post Richard Henderson
2021-08-18 19:18 ` [PATCH v3 28/66] plugins: Reorg arguments to qemu_plugin_vcpu_mem_cb Richard Henderson
2021-08-30 21:42 ` Philippe Mathieu-Daudé
2021-08-18 19:18 ` [PATCH v3 29/66] trace: Split guest_mem_before Richard Henderson
2021-08-18 19:18 ` [PATCH v3 30/66] target/arm: Use MO_128 for 16 byte atomics Richard Henderson
2021-08-18 19:18 ` [PATCH v3 31/66] target/i386: " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 32/66] target/ppc: " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 33/66] target/s390x: " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 34/66] target/hexagon: Implement cpu_mmu_index Richard Henderson
2021-08-18 19:18 ` [PATCH v3 35/66] accel/tcg: Add cpu_{ld,st}*_mmu interfaces Richard Henderson
2021-08-19 15:57 ` Peter Maydell
2021-08-18 19:18 ` [PATCH v3 36/66] accel/tcg: Move cpu_atomic decls to exec/cpu_ldst.h Richard Henderson
2021-08-18 19:18 ` [PATCH v3 37/66] target/mips: Use cpu_*_data_ra for msa load/store Richard Henderson
2021-08-18 19:18 ` [PATCH v3 38/66] target/mips: Use 8-byte memory ops " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 39/66] target/s390x: Use cpu_*_mmu instead of helper_*_mmu Richard Henderson
2021-08-18 19:18 ` [PATCH v3 40/66] target/sparc: " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 41/66] target/arm: " Richard Henderson
2021-08-18 19:18 ` [PATCH v3 42/66] tcg: Move helper_*_mmu decls to tcg/tcg-ldst.h Richard Henderson
2021-08-18 19:18 ` [PATCH v3 43/66] tcg: Add helper_unaligned_{ld, st} for user-only sigbus Richard Henderson
2021-08-19 15:58 ` Peter Maydell
2021-08-18 19:18 ` [PATCH v3 44/66] tcg/i386: Support raising sigbus for user-only Richard Henderson
2021-08-19 16:02 ` Peter Maydell
2021-08-18 19:18 ` Richard Henderson [this message]
2021-08-19 16:04 ` [PATCH v3 45/66] tests/tcg/multiarch: Add sigbus.c Peter Maydell
2021-08-18 19:19 ` [PATCH v3 46/66] linux-user: Split out do_prctl and subroutines Richard Henderson
2021-08-19 16:06 ` Peter Maydell
2021-08-19 19:30 ` Richard Henderson
2021-08-18 19:19 ` [PATCH v3 47/66] linux-user: Disable more prctl subcodes Richard Henderson
2021-08-18 19:19 ` [PATCH v3 48/66] hw/core/cpu: Re-sort the non-pointers to the end of CPUClass Richard Henderson
2021-08-18 21:17 ` Philippe Mathieu-Daudé
2021-08-18 19:19 ` [PATCH v3 49/66] linux-user: Add code for PR_GET/SET_UNALIGN Richard Henderson
2021-08-18 19:19 ` [PATCH v3 50/66] hw/core/cpu: Move cpu properties to cpu-sysemu.c Richard Henderson
2021-08-19 15:26 ` Peter Maydell
2021-08-19 16:52 ` Eduardo Habkost
2021-08-18 19:19 ` [PATCH v3 51/66] hw/core/cpu: Add prctl-unalign-sigbus property for user-only Richard Henderson
2021-08-18 19:19 ` [PATCH v3 52/66] target/alpha: Reorg fp memory operations Richard Henderson
2021-08-18 21:21 ` Philippe Mathieu-Daudé
2021-08-18 19:19 ` [PATCH v3 53/66] target/alpha: Reorg integer " Richard Henderson
2021-08-20 9:29 ` Peter Maydell
2021-08-18 19:19 ` [PATCH v3 54/66] target/alpha: Implement prctl_unalign_sigbus Richard Henderson
2021-08-18 19:19 ` [PATCH v3 55/66] target/hppa: " Richard Henderson
2021-08-18 19:19 ` [PATCH v3 56/66] target/sh4: " Richard Henderson
2021-08-18 19:19 ` [PATCH v3 57/66] accel/tcg/user-exec: Convert DEBUG_SIGNAL to tracepoint Richard Henderson
2021-08-18 21:22 ` Philippe Mathieu-Daudé
2021-08-18 19:19 ` [PATCH v3 58/66] include/exec: Move cpu_signal_handler declaration Richard Henderson
2021-08-18 21:23 ` Philippe Mathieu-Daudé
2021-08-19 6:18 ` Alistair Francis
2021-08-18 19:19 ` [PATCH v3 59/66] accel/tcg: Handle SIGBUS in handle_cpu_signal Richard Henderson
2021-08-20 9:34 ` Peter Maydell
2021-08-22 7:48 ` Richard Henderson
2021-08-18 19:19 ` [PATCH v3 60/66] tcg/aarch64: Support raising sigbus for user-only Richard Henderson
2021-08-20 9:46 ` Peter Maydell
2021-08-18 19:19 ` [PATCH v3 61/66] tcg/ppc: " Richard Henderson
2021-08-20 10:11 ` Peter Maydell
2021-08-18 19:19 ` [PATCH v3 62/66] tcg/s390: " Richard Henderson
2021-08-20 10:12 ` Peter Maydell
2021-08-18 19:19 ` [PATCH v3 63/66] tcg/tci: " Richard Henderson
2021-08-20 10:14 ` Peter Maydell
2021-08-22 7:59 ` Richard Henderson
2021-08-22 12:32 ` Peter Maydell
2021-08-22 17:09 ` Richard Henderson
2021-08-18 19:19 ` [PATCH v3 64/66] tcg: Canonicalize alignment flags in MemOp Richard Henderson
2021-08-18 21:24 ` Philippe Mathieu-Daudé
2021-08-18 19:19 ` [PATCH v3 65/66] tcg/riscv: Support raising sigbus for user-only Richard Henderson
2021-08-18 19:19 ` [PATCH v3 66/66] tcg/riscv: Remove add with zero on user-only memory access Richard Henderson
2021-08-30 21:29 ` Philippe Mathieu-Daudé
2021-08-30 22:38 ` Alistair Francis
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