Page MenuHomeFreeBSD
Files F162783958

D56654.id176688.diff
No OneTemporary
Actions

D56654.id176688.diff
View Options

diff --git a/tests/sys/arch/amd64/Makefile b/tests/sys/arch/amd64/Makefile
new file mode 100644
--- /dev/null
+++ b/tests/sys/arch/amd64/Makefile
@@ -0,0 +1,7 @@
+TESTSDIR= ${TESTSBASE}/sys/arch/amd64
+
+PLAIN_TESTS_C+= int0x80
+
+BINDIR= ${TESTSDIR}
+
+.include <bsd.test.mk>
diff --git a/tests/sys/arch/amd64/int0x80.c b/tests/sys/arch/amd64/int0x80.c
new file mode 100644
--- /dev/null
+++ b/tests/sys/arch/amd64/int0x80.c
@@ -0,0 +1,94 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright 2026 The FreeBSD Foundation
+ *
+ * This software were developed by
+ * Konstantin Belousov <kib@FreeBSD.org> under sponsorship from
+ * the FreeBSD Foundation.
+ */
+
+#include <sys/syscall.h>
+#include <err.h>
+#include <signal.h>
+#include <stdatomic.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifndef __amd64__
+#error "amd64 only"
+#endif
+
+/*
+ * The check to see how "INT $0x80" behaves for amd64 native ABI
+ * processes. Before bd8edba0792b71be3f8ed5dea9c22287e95c986a it
+ * executed syscalls with amd64 calling conventions. After that
+ * revision, it should raise SIGBUS.
+ */
+
+static uintptr_t int0x80_loc;
+static int signo;
+extern char after_int0x80[];
+
+static void
+sigill_action(int signo1, siginfo_t *si __unused, void *uctxv)
+{
+ ucontext_t *uctx = uctxv;
+
+ signo = signo1;
+ int0x80_loc = uctx->uc_mcontext.mc_rip;
+}
+
+static int
+fire(void)
+{
+ int res;
+
+ asm volatile(
+ ".globl\tafter_int0x80\n"
+ "\tint\t$0x80\n"
+ "after_int0x80:"
+ : "=a" (res)
+ : "%0" (SYS_getpid)
+ : "rdx", "memory", "cc");
+ return (res);
+}
+
+int
+main(void)
+{
+ struct sigaction sa;
+ char signame[SIG2STR_MAX];
+ int pid, res;
+
+ res = 0;
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_sigaction = sigill_action;
+ sa.sa_flags = SA_SIGINFO;
+ if (sigaction(SIGBUS, &sa, NULL) == -1)
+ err(1, "catching SIGBUS");
+
+ pid = fire();
+ atomic_signal_fence(memory_order_seq_cst);
+ if (int0x80_loc == 0) {
+ printf("int $0x80 does not raise SIGBUS\n");
+ if (pid == getpid())
+ printf("and syscall worked\n");
+ else
+ printf("but syscall did not worked\n");
+ res = 1;
+ } else {
+ sig2str(signo, signame);
+ printf("int $0x80 raises SIG%s\n", signame);
+ if (int0x80_loc == (uintptr_t)after_int0x80) {
+ printf("at expected location\n");
+ } else {
+ printf("not at expected location\n");
+ res = 1;
+ }
+ }
+ exit(res);
+}

File Metadata

Mime Type
text/plain
Expires
Fri, Jul 17, 8:46 PM (16 h, 24 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
35176957
Default Alt Text
D56654.id176688.diff (2 KB)

Event Timeline