0.9.14.3:

[sbcl.git] / src / runtime / x86-arch.c

diff --git a/src/runtime/x86-arch.c b/src/runtime/x86-arch.c
index 5b98eb3..9a835fa 100644 (file)
--- a/src/runtime/x86-arch.c
+++ b/src/runtime/x86-arch.c
@@ -23,7 +23,6 @@
 #include "interrupt.h"
 #include "interr.h"
 #include "breakpoint.h"
-#include "monitor.h"
 #include "thread.h"
 
 #include "genesis/static-symbols.h"
@@ -224,7 +223,7 @@ sigtrap_handler(int signal, siginfo_t *info, void *void_context)
         *(single_stepping-2) = single_step_save2;
         *(single_stepping-1) = single_step_save3;
 #else
-        *context_eflags_addr(context) ^= 0x100;
+        *context_eflags_addr(context) &= ~0x100;
 #endif
         /* Re-install the breakpoint if possible. */
         if (*os_context_pc_addr(context) == (int)single_stepping + 1) {
@@ -250,10 +249,22 @@ sigtrap_handler(int signal, siginfo_t *info, void *void_context)
        single-stepping (as far as I can tell) this is somewhat moot,
        but it might be worth either moving this code up or deleting
        the single-stepping code entirely.  -- CSR, 2002-07-15 */
-#ifdef LISP_FEATURE_LINUX
+#if defined(LISP_FEATURE_LINUX) || defined(RESTORE_FP_CONTROL_FROM_CONTEXT)
     os_restore_fp_control(context);
 #endif
 
+
+#ifdef LISP_FEATURE_SUNOS
+    /* For some reason the breakpoints that :ENCAPSULATE NIL tracing sets up
+     * cause a trace trap (i.e. processor single-stepping trap) on the following
+     * instruction on Solaris 10/x86. -- JES, 2006-04-07
+     */
+    if (info->si_code == TRAP_TRACE) {
+        lose("foo");
+        return;
+    }
+#endif
+
     /* On entry %eip points just after the INT3 byte and aims at the
      * 'kind' value (eg trap_Cerror). For error-trap and Cerror-trap a
      * number of bytes will follow, the first is the length of the byte
@@ -304,8 +315,19 @@ sigtrap_handler(int signal, siginfo_t *info, void *void_context)
 static void
 sigill_handler(int signal, siginfo_t *siginfo, void *void_context) {
     os_context_t *context = (os_context_t*)void_context;
+
+    /* Triggering SIGTRAP using int3 is unreliable on OS X/x86, so
+     * we need to use illegal instructions for traps.
+     */
+#if defined(LISP_FEATURE_DARWIN)
+    if (*((unsigned short *)*os_context_pc_addr(context)) == 0x0b0f) {
+        *os_context_pc_addr(context) += 2;
+        return sigtrap_handler(signal, siginfo, void_context);
+    }
+#endif
+
     fake_foreign_function_call(context);
-    monitor_or_something();
+    lose("fake_foreign_call fell through");
 }
 
 void