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powerpc: Simplify and clean up the xmon terminal I/O

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This factors out the common bits of arch/powerpc/xmon/start_*.c into
a new nonstdio.c, and removes some stuff that was supposed to make
xmon's I/O routines somewhat stdio-like but was never used.

It also makes the parsing of the xmon= command line option common,
so that ppc32 can now use xmon={off,on,early} also.

Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras
2005-11-08 22:55:08 +11:00
parent 3825ac0ee6
commit fca5dcd483
12 changed files with 238 additions and 731 deletions
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37
arch/powerpc/xmon/xmon.c
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@@ -1,7 +1,7 @@
/*
* Routines providing a simple monitor for use on the PowerMac.
*
* Copyright (C) 1996 Paul Mackerras.
* Copyright (C) 1996-2005 Paul Mackerras.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -18,6 +18,7 @@
#include <linux/kallsyms.h>
#include <linux/cpumask.h>
#include <linux/module.h>
#include <linux/sysrq.h>
#include <asm/ptrace.h>
#include <asm/string.h>
@@ -144,15 +145,10 @@ static void xmon_print_symbol(unsigned long address, const char *mid,
static const char *getvecname(unsigned long vec);
extern int print_insn_powerpc(unsigned long, unsigned long, int);
extern void printf(const char *fmt, ...);
extern void xmon_vfprintf(void *f, const char *fmt, va_list ap);
extern int xmon_putc(int c, void *f);
extern int putchar(int ch);
extern void xmon_enter(void);
extern void xmon_leave(void);
extern int xmon_read_poll(void);
extern long setjmp(long *);
extern void longjmp(long *, long);
extern void xmon_save_regs(struct pt_regs *);
@@ -748,7 +744,6 @@ cmds(struct pt_regs *excp)
printf("%x:", smp_processor_id());
#endif /* CONFIG_SMP */
printf("mon> ");
fflush(stdout);
flush_input();
termch = 0;
cmd = skipbl();
@@ -2151,7 +2146,6 @@ memzcan(void)
ok = mread(a, &v, 1);
if (ok && !ook) {
printf("%.8x .. ", a);
fflush(stdout);
} else if (!ok && ook)
printf("%.8x\n", a - mskip);
ook = ok;
@@ -2372,7 +2366,7 @@ int
inchar(void)
{
if (lineptr == NULL || *lineptr == 0) {
if (fgets(line, sizeof(line), stdin) == NULL) {
if (xmon_gets(line, sizeof(line)) == NULL) {
lineptr = NULL;
return EOF;
}
@@ -2526,4 +2520,29 @@ void xmon_init(int enable)
__debugger_dabr_match = NULL;
__debugger_fault_handler = NULL;
}
xmon_map_scc();
}
#ifdef CONFIG_MAGIC_SYSRQ
static void sysrq_handle_xmon(int key, struct pt_regs *pt_regs,
struct tty_struct *tty)
{
/* ensure xmon is enabled */
xmon_init(1);
debugger(pt_regs);
}
static struct sysrq_key_op sysrq_xmon_op =
{
.handler = sysrq_handle_xmon,
.help_msg = "Xmon",
.action_msg = "Entering xmon",
};
static int __init setup_xmon_sysrq(void)
{
register_sysrq_key('x', &sysrq_xmon_op);
return 0;
}
__initcall(setup_xmon_sysrq);
#endif /* CONFIG_MAGIC_SYSRQ */