Move signal trampolines out of locore.s into separate source file.

Similar to other arches, the move makes the subject of locore.s only
the kernel startup.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

2 files changed, 118 insertions, 72 deletions

diff --git a/sys/i386/i386/locore.s b/sys/i386/i386/locore.s
index ab3f79ffdcf6..8685e1a9c7e5 100644
--- a/sys/i386/i386/locore.s
+++ b/sys/i386/i386/locore.s
@@ -44,7 +44,6 @@
 #include "opt_nfsroot.h"
 #include "opt_pmap.h"
 
-#include <sys/syscall.h>
 #include <sys/reboot.h>
 
 #include <machine/asmacros.h>
@@ -293,77 +292,6 @@ begin:
 	/* NOTREACHED */
 	addl	$0,%esp			/* for db_numargs() again */
 
-/*
- * Signal trampoline, copied to top of user stack
- */
-NON_GPROF_ENTRY(sigcode)
-	calll	*SIGF_HANDLER(%esp)
-	leal	SIGF_UC(%esp),%eax	/* get ucontext */
-	pushl	%eax
-	testl	$PSL_VM,UC_EFLAGS(%eax)
-	jne	1f
-	mov	UC_GS(%eax),%gs		/* restore %gs */
-1:
-	movl	$SYS_sigreturn,%eax
-	pushl	%eax			/* junk to fake return addr. */
-	int	$0x80			/* enter kernel with args */
-					/* on stack */
-1:
-	jmp	1b
-
-#ifdef COMPAT_FREEBSD4
-	ALIGN_TEXT
-freebsd4_sigcode:
-	calll	*SIGF_HANDLER(%esp)
-	leal	SIGF_UC4(%esp),%eax	/* get ucontext */
-	pushl	%eax
-	testl	$PSL_VM,UC4_EFLAGS(%eax)
-	jne	1f
-	mov	UC4_GS(%eax),%gs	/* restore %gs */
-1:
-	movl	$344,%eax		/* 4.x SYS_sigreturn */
-	pushl	%eax			/* junk to fake return addr. */
-	int	$0x80			/* enter kernel with args */
-					/* on stack */
-1:
-	jmp	1b
-#endif
-
-#ifdef COMPAT_43
-	ALIGN_TEXT
-osigcode:
-	call	*SIGF_HANDLER(%esp)	/* call signal handler */
-	lea	SIGF_SC(%esp),%eax	/* get sigcontext */
-	pushl	%eax
-	testl	$PSL_VM,SC_PS(%eax)
-	jne	9f
-	mov	SC_GS(%eax),%gs		/* restore %gs */
-9:
-	movl	$103,%eax		/* 3.x SYS_sigreturn */
-	pushl	%eax			/* junk to fake return addr. */
-	int	$0x80			/* enter kernel with args */
-0:	jmp	0b
-#endif /* COMPAT_43 */
-
-	ALIGN_TEXT
-esigcode:
-
-	.data
-	.globl	szsigcode
-szsigcode:
-	.long	esigcode-sigcode
-#ifdef COMPAT_FREEBSD4
-	.globl	szfreebsd4_sigcode
-szfreebsd4_sigcode:
-	.long	esigcode-freebsd4_sigcode
-#endif
-#ifdef COMPAT_43
-	.globl	szosigcode
-szosigcode:
-	.long	esigcode-osigcode
-#endif
-	.text
-
 /**********************************************************************
  *
  * Recover the bootinfo passed to us from the boot program
diff --git a/sys/i386/i386/sigtramp.s b/sys/i386/i386/sigtramp.s
new file mode 100644
index 000000000000..61a3c2ad6f29
--- /dev/null
+++ b/sys/i386/i386/sigtramp.s
@@ -0,0 +1,118 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	from: @(#)locore.s	7.3 (Berkeley) 5/13/91
+ * $FreeBSD$
+ *
+ *		originally from: locore.s, by William F. Jolitz
+ *
+ *		Substantially rewritten by David Greenman, Rod Grimes,
+ *			Bruce Evans, Wolfgang Solfrank, Poul-Henning Kamp
+ *			and many others.
+ */
+
+#include "opt_compat.h"
+
+#include <sys/syscall.h>
+#include <machine/asmacros.h>
+#include <machine/psl.h>
+
+#include "assym.s"
+
+/*
+ * Signal trampoline, copied to top of user stack
+ */
+NON_GPROF_ENTRY(sigcode)
+	calll	*SIGF_HANDLER(%esp)
+	leal	SIGF_UC(%esp),%eax	/* get ucontext */
+	pushl	%eax
+	testl	$PSL_VM,UC_EFLAGS(%eax)
+	jne	1f
+	mov	UC_GS(%eax),%gs		/* restore %gs */
+1:
+	movl	$SYS_sigreturn,%eax
+	pushl	%eax			/* junk to fake return addr. */
+	int	$0x80			/* enter kernel with args */
+					/* on stack */
+1:
+	jmp	1b
+
+#ifdef COMPAT_FREEBSD4
+	ALIGN_TEXT
+freebsd4_sigcode:
+	calll	*SIGF_HANDLER(%esp)
+	leal	SIGF_UC4(%esp),%eax	/* get ucontext */
+	pushl	%eax
+	testl	$PSL_VM,UC4_EFLAGS(%eax)
+	jne	1f
+	mov	UC4_GS(%eax),%gs	/* restore %gs */
+1:
+	movl	$344,%eax		/* 4.x SYS_sigreturn */
+	pushl	%eax			/* junk to fake return addr. */
+	int	$0x80			/* enter kernel with args */
+					/* on stack */
+1:
+	jmp	1b
+#endif
+
+#ifdef COMPAT_43
+	ALIGN_TEXT
+osigcode:
+	call	*SIGF_HANDLER(%esp)	/* call signal handler */
+	lea	SIGF_SC(%esp),%eax	/* get sigcontext */
+	pushl	%eax
+	testl	$PSL_VM,SC_PS(%eax)
+	jne	9f
+	mov	SC_GS(%eax),%gs		/* restore %gs */
+9:
+	movl	$103,%eax		/* 3.x SYS_sigreturn */
+	pushl	%eax			/* junk to fake return addr. */
+	int	$0x80			/* enter kernel with args */
+0:	jmp	0b
+#endif /* COMPAT_43 */
+
+	ALIGN_TEXT
+esigcode:
+
+	.data
+	.globl	szsigcode
+szsigcode:
+	.long	esigcode-sigcode
+#ifdef COMPAT_FREEBSD4
+	.globl	szfreebsd4_sigcode
+szfreebsd4_sigcode:
+	.long	esigcode-freebsd4_sigcode
+#endif
+#ifdef COMPAT_43
+	.globl	szosigcode
+szosigcode:
+	.long	esigcode-osigcode
+#endif