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-rw-r--r--i386/Files1
-rw-r--r--i386/Makefrag5
-rw-r--r--i386/i386/_setjmp.S63
3 files changed, 69 insertions, 0 deletions
diff --git a/i386/Files b/i386/Files
index a55e410..a8e85f2 100644
--- a/i386/Files
+++ b/i386/Files
@@ -54,6 +54,7 @@ i386/dos/i16/i16_vcpi.c
i386/dos/i16/i16_xms.c
i386/dos/i16/idt.h
i386/dos/i16/phys_mem_sources.h
+i386/i368/_setjmp.S
i386/i386/ast.h
i386/i386/ast_check.c
i386/i386/ast_types.h
diff --git a/i386/Makefrag b/i386/Makefrag
index 979365f..0171130 100644
--- a/i386/Makefrag
+++ b/i386/Makefrag
@@ -46,6 +46,11 @@ objfiles += fpe.o
# Mig-generated
objfiles += mach_i386_server.o
+# This file is only needed for KDB support.
+ifeq ($(enable_kdb),yes)
+objfiles += _setjmp.o
+endif
+
### Linux device drivers (make this Better, Please)
linux-gen-files = $(addprefix linux_,$(linux-gen-names))
diff --git a/i386/i386/_setjmp.S b/i386/i386/_setjmp.S
new file mode 100644
index 0000000..efabeb6
--- /dev/null
+++ b/i386/i386/_setjmp.S
@@ -0,0 +1,63 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ * C library -- _setjmp, _longjmp
+ *
+ * _longjmp(a,v)
+ * will generate a "return(v)" from
+ * the last call to
+ * _setjmp(a)
+ * by restoring registers from the stack,
+ * The previous signal state is NOT restored.
+ *
+ */
+
+#include <mach/machine/asm.h>
+
+ENTRY(_setjmp)
+ movl 4(%esp),%ecx /* fetch buffer */
+ movl %ebx,0(%ecx)
+ movl %esi,4(%ecx)
+ movl %edi,8(%ecx)
+ movl %ebp,12(%ecx) /* save frame pointer of caller */
+ popl %edx
+ movl %esp,16(%ecx) /* save stack pointer of caller */
+ movl %edx,20(%ecx) /* save pc of caller */
+ xorl %eax,%eax
+ jmp *%edx
+
+ENTRY(_longjmp)
+ movl 8(%esp),%eax /* return(v) */
+ movl 4(%esp),%ecx /* fetch buffer */
+ movl 0(%ecx),%ebx
+ movl 4(%ecx),%esi
+ movl 8(%ecx),%edi
+ movl 12(%ecx),%ebp
+ movl 16(%ecx),%esp
+ orl %eax,%eax
+ jnz 0f
+ incl %eax
+0: jmp *20(%ecx) /* done, return.... */