Merge minidumps from amd64 where they were originally developed.

Major differences:
 * since there is no direct map region, there is no custom uma memory
   allocator to modify to include its pages in the dumps.
 * Various data entries are reduced from 64 bit to 32 bit to match the
   native size.

dump_add_page() and dump_drop_page() are still present in case one wants to
arrange for arbitary pages to be dumped.  This is of marginal use though
because libkvm+kgdb cannot address physical memory that isn't mapped into
kvm.

2 files changed, 51 insertions, 0 deletions

diff --git a/sys/i386/include/md_var.h b/sys/i386/include/md_var.h
index afccf1d..92b7152 100644
--- a/sys/i386/include/md_var.h
+++ b/sys/i386/include/md_var.h
@@ -65,12 +65,15 @@ extern	int	szfreebsd4_sigcode;
 #ifdef COMPAT_43
 extern	int	szosigcode;
 #endif
+extern	uint32_t *vm_page_dump;
+extern	int	vm_page_dump_size;
 
 typedef void alias_for_inthand_t(u_int cs, u_int ef, u_int esp, u_int ss);
 struct	thread;
 struct	reg;
 struct	fpreg;
 struct  dbreg;
+struct	dumperinfo;
 
 void	bcopyb(const void *from, void *to, size_t len);
 void	busdma_swi(void);
@@ -84,6 +87,8 @@ void	doreti_popl_es(void) __asm(__STRING(doreti_popl_es));
 void	doreti_popl_es_fault(void) __asm(__STRING(doreti_popl_es_fault));
 void	doreti_popl_fs(void) __asm(__STRING(doreti_popl_fs));
 void	doreti_popl_fs_fault(void) __asm(__STRING(doreti_popl_fs_fault));
+void	dump_add_page(vm_paddr_t);
+void	dump_drop_page(vm_paddr_t);
 void	enable_sse(void);
 void	fillw(int /*u_short*/ pat, void *base, size_t cnt);
 void	i486_bzero(void *buf, size_t len);
@@ -99,5 +104,6 @@ int	isa_nmi(int cd);
 vm_paddr_t kvtop(void *addr);
 void	setidt(int idx, alias_for_inthand_t *func, int typ, int dpl, int selec);
 int     user_dbreg_trap(void);
+void	minidumpsys(struct dumperinfo *);
 
 #endif /* !_MACHINE_MD_VAR_H_ */
diff --git a/sys/i386/include/minidump.h b/sys/i386/include/minidump.h
new file mode 100644
index 0000000..55508a3
--- /dev/null
+++ b/sys/i386/include/minidump.h
@@ -0,0 +1,45 @@
+/*-
+ * Copyright (c) 2006 Peter Wemm
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_MACHINE_MINIDUMP_H_
+#define	_MACHINE_MINIDUMP_H_ 1
+
+#define	MINIDUMP_MAGIC		"minidump FreeBSD/i386"
+#define	MINIDUMP_VERSION	1
+
+struct minidumphdr {
+	char magic[24];
+	uint32_t version;
+	uint32_t msgbufsize;
+	uint32_t bitmapsize;
+	uint32_t ptesize;
+	uint32_t kernbase;
+	uint32_t paemode;
+};
+
+#endif /* _MACHINE_MINIDUMP_H_ */