X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-arch.c;h=96d3bcd72e6f4ebefd46510977e15763ee37b16d;hb=7f0f521aa3f6b45259c5dfd5f7f11adcd1a7cac6;hp=c46711567e9307364a4dbde2836f4937abdfa57f;hpb=dfa55a883f94470267b626dae77ce7e7dfac3df6;p=sbcl.git

diff --git a/src/runtime/x86-arch.c b/src/runtime/x86-arch.c
index c467115..96d3bcd 100644
--- a/src/runtime/x86-arch.c
+++ b/src/runtime/x86-arch.c
@@ -23,6 +23,7 @@
 #include "interrupt.h"
 #include "interr.h"
 #include "breakpoint.h"
+#include "monitor.h"
 
 #define BREAKPOINT_INST 0xcc	/* INT3 */
 
@@ -67,7 +68,7 @@ void arch_skip_instruction(os_context_t *context)
     int vlen;
     int code;
 
-    FSHOW((stderr, "[arch_skip_inst at %x]\n", *os_context_pc_addr(context)));
+    FSHOW((stderr, "/[arch_skip_inst at %x]\n", *os_context_pc_addr(context)));
 
     /* Get and skip the Lisp interrupt code. */
     code = *(char*)(*os_context_pc_addr(context))++;
@@ -84,7 +85,7 @@ void arch_skip_instruction(os_context_t *context)
 	    break;
 
 	case trap_Breakpoint:		/* not tested */
-	case trap_FunctionEndBreakpoint: /* not tested */
+	case trap_FunEndBreakpoint: /* not tested */
 	    break;
 
 	case trap_PendingInterrupt:
@@ -98,7 +99,7 @@ void arch_skip_instruction(os_context_t *context)
 	}
 
     FSHOW((stderr,
-	   "[arch_skip_inst resuming at %x]\n",
+	   "/[arch_skip_inst resuming at %x]\n",
 	   *os_context_pc_addr(context)));
 }
 
@@ -224,7 +225,7 @@ sigtrap_handler(int signal, siginfo_t *info, void *void_context)
     switch (trap) {
 
     case trap_PendingInterrupt:
-	FSHOW((stderr, "<trap pending interrupt>\n"));
+	FSHOW((stderr, "/<trap pending interrupt>\n"));
 	arch_skip_instruction(context);
 	interrupt_handle_pending(context);
 	break;
@@ -248,25 +249,46 @@ sigtrap_handler(int signal, siginfo_t *info, void *void_context)
 	handle_breakpoint(signal, info, context);
 	break;
 
-    case trap_FunctionEndBreakpoint:
+    case trap_FunEndBreakpoint:
 	(char*)(*os_context_pc_addr(context)) -= 1;
 	*os_context_pc_addr(context) =
-	    (int)handle_function_end_breakpoint(signal, info, context);
+	    (int)handle_fun_end_breakpoint(signal, info, context);
 	break;
 
     default:
-	FSHOW((stderr,"[C--trap default %d %d %x]\n",
+	FSHOW((stderr,"/[C--trap default %d %d %x]\n",
 	       signal, code, context));
 	interrupt_handle_now(signal, info, context);
 	break;
     }
 }
 
+static void
+sigill_handler(int signal, siginfo_t *siginfo, void *void_context) {
+    os_context_t *context = (os_context_t*)void_context;
+    fake_foreign_function_call(context);
+    monitor_or_something();
+}
+
 void
 arch_install_interrupt_handlers()
 {
-    interrupt_install_low_level_handler(SIGILL , sigtrap_handler);
-    interrupt_install_low_level_handler(SIGTRAP, sigtrap_handler);
+    SHOW("entering arch_install_interrupt_handlers()");
+
+    /* Note: The old CMU CL code here used sigtrap_handler() to handle
+     * SIGILL as well as SIGTRAP. I couldn't see any reason to do
+     * things that way. So, I changed to separate handlers when
+     * debugging a problem on OpenBSD, where SBCL wasn't catching
+     * SIGILL properly, but was instead letting the process be
+     * terminated with an "Illegal instruction" output. If this change
+     * turns out to break something (maybe breakpoint handling on some
+     * OS I haven't tested on?) and we have to go back to the old CMU
+     * CL way, I hope there will at least be a comment to explain
+     * why.. -- WHN 2001-06-07 */
+    undoably_install_low_level_interrupt_handler(SIGILL , sigill_handler);
+    undoably_install_low_level_interrupt_handler(SIGTRAP, sigtrap_handler);
+
+    SHOW("returning from arch_install_interrupt_handlers()");
 }
 
 /* This is implemented in assembly language and called from C: */
@@ -286,6 +308,7 @@ funcall0(lispobj function)
 {
     lispobj *args = NULL;
 
+    FSHOW((stderr, "/entering funcall0(0x%lx)\n", (long)function));
     return call_into_lisp(function, args, 0);
 }
 lispobj