From 52ddbb1c75a53d84589543af72c69c31705329a9 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Wed, 18 Jul 1990 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1990-07-18

---
 port/devcons.c |  1 +
 power/dat.h    | 13 +++++++++++++
 power/fns.h    |  2 ++
 power/io.h     |  2 +-
 power/main.c   |  1 +
 5 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/port/devcons.c b/port/devcons.c
index 9f8673b48cec576916d7874ce813150e3543c64c..606b9ea33fd695b6217652c4b09c60d53e0b7a6b 100644
--- a/port/devcons.c
+++ b/port/devcons.c
@@ -89,6 +89,7 @@ putstrn(char *str, int n)
 
 	s = splhi();
 	lock(&printq);
+	syslog(str, n);
 	while(n > 0){
 		if(*str == '\n')
 			puts("\r", 1);
diff --git a/power/dat.h b/power/dat.h
index 0d6cf1429fdd924d731496eef3f98970b7cafb5f..c693ccecdcc3555346db63e4fb3312b4d3ce791e 100644
--- a/power/dat.h
+++ b/power/dat.h
@@ -37,6 +37,7 @@ typedef struct Seg	Seg;
 typedef struct Stream	Stream;
 typedef struct Ureg	Ureg;
 typedef struct User	User;
+typedef struct Syslog	Syslog;
 
 typedef int Devgen(Chan*, Dirtab*, int, int, Dir*);
 
@@ -689,3 +690,15 @@ extern	ulong	initcode[];
 extern	Dev	devtab[];
 extern	char	devchar[];
 extern	FPsave	initfp;
+
+/*
+ *  kernel based system log, passed between crashes
+ */
+#define SYSLOG		((Syslog *)(0x80001B00))
+#define SYSLOGMAGIC	0x12345678
+struct Syslog
+{
+	ulong	magic;
+	char	*next;
+	char	buf[16*1024];
+};
diff --git a/power/fns.h b/power/fns.h
index e97966c6075bbc8c39e9a5d969d4e3a1f3151f04..9f30cc64beee1670374cc406bda092be0bb5c070 100644
--- a/power/fns.h
+++ b/power/fns.h
@@ -172,6 +172,8 @@ void	streamopen(Chan*, Qinfo*);
 int	streamparse(char*, Block*);
 long	stringread(Chan*, void*, long, char*);
 long	syscall(Ureg*);
+void	sysloginit(void);
+void	syslog(char*, int);
 void	tlbinit(void);
 void	touser(void *);
 void	tsleep(Rendez*, int (*)(void*), void*, int);
diff --git a/power/io.h b/power/io.h
index c1a9b083c1b6a81196abb57e301297ccc0a0ee0f..10cec7bac0aa49bc38a2555b79a760d488cad533 100644
--- a/power/io.h
+++ b/power/io.h
@@ -77,4 +77,4 @@ struct INTVEC {
 #define IO2MASK		IO2(ushort, 0xFE8000)
 #define	MPBERR0		IO2(ulong, 0xF48000)
 #define	MPBERR1		IO2(ulong, 0xF4C000)
-#define SBEADDR		((ulong *)(UNCACHED|0x1f080000))
+#define SBEADDR		((ulong *)(UNCACHED|0x1F080000))
diff --git a/power/main.c b/power/main.c
index b2a223685d56aa79c3c4200f8915dcb62cd46ec8..b44f348020b2563dc23044e6458bfcafc85bfd29 100644
--- a/power/main.c
+++ b/power/main.c
@@ -57,6 +57,7 @@ main(void)
 	io2init();
 	chandevreset();
 	streaminit();
+	sysloginit();
 	pageinit();
 	userinit();
 	launchinit();