4bd97c6535
Merge the x1000 and jz47xx exception handling code since they use the same exception vectors and handlers. The interrupt handler is now called from the common exception vector, but remains separate for each board since they have different IRQ layouts. The new exception handler can provide a stack traceback from the interrupted code, rather than the (uninteresting) caller traceback displayed by panicf. This allows you to see what led up to a null pointer deref or division by zero, which makes it _much_ easier to track down errors that occur in common leaf functions like strcmp. Change-Id: I59a0ebb5e40fcb36505c3bfdb47f8cac2f9936b1
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by wavey@wavey.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include "panic.h"
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#include "lcd.h"
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#include "font.h"
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#include "debug.h"
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#include "led.h"
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#include "power.h"
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#include "system.h"
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#include "logf.h"
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#ifdef HAVE_RB_BACKTRACE
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#include "gcc_extensions.h"
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#include "backtrace.h"
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#endif
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#if (defined(CPU_MIPS) && (CONFIG_PLATFORM & PLATFORM_NATIVE))
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/* TODO: see comment above exception_dump in system-mips.c */
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char panic_buf[128];
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#else
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static char panic_buf[128];
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#endif
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#define LINECHARS (LCD_WIDTH/SYSFONT_WIDTH) - 2
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#if defined(CPU_ARM)
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void panicf_f( const char *fmt, ...);
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/* we wrap panicf() here with naked function to catch SP value */
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void __attribute__((naked)) panicf( const char *fmt, ...)
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{
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(void)fmt;
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asm volatile ("mov r4, sp \n"
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"b panicf_f \n"
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);
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while (1);
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}
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/*
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* "Dude. This is pretty fucked-up, right here."
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*/
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void panicf_f( const char *fmt, ...)
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{
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int sp;
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asm volatile ("mov %[SP],r4 \n"
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: [SP] "=r" (sp)
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);
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int pc = (int)__builtin_return_address(0);
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#elif defined(BACKTRACE_MIPSUNWINDER)
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void panicf( const char *fmt, ... )
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{
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/* NOTE: these are obtained by the backtrace lib */
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const int pc = 0;
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const int sp = 0;
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#else
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void panicf( const char *fmt, ...)
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{
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#endif
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va_list ap;
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#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
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/* Disable interrupts */
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#ifdef CPU_ARM
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disable_interrupt(IRQ_FIQ_STATUS);
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#else
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set_irq_level(DISABLE_INTERRUPTS);
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#endif
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#endif /* SIMULATOR */
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va_start( ap, fmt );
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vsnprintf( panic_buf, sizeof(panic_buf), fmt, ap );
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va_end( ap );
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lcd_set_viewport(NULL);
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int y = 1;
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#if LCD_DEPTH > 1
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lcd_set_backdrop(NULL);
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lcd_set_drawmode(DRMODE_SOLID);
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lcd_set_foreground(LCD_BLACK);
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lcd_set_background(LCD_WHITE);
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#endif
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lcd_clear_display();
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lcd_setfont(FONT_SYSFIXED);
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lcd_puts(1, y++, (unsigned char *)"*PANIC*");
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{
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/* wrap panic line */
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int i, len = strlen(panic_buf);
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for (i=0; i<len; i+=LINECHARS) {
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unsigned char c = panic_buf[i+LINECHARS];
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panic_buf[i+LINECHARS] = 0;
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lcd_puts(1, y++, (unsigned char *)panic_buf+i);
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panic_buf[i+LINECHARS] = c;
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}
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}
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#if defined(HAVE_RB_BACKTRACE)
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rb_backtrace(pc, sp, &y);
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#endif
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#ifdef ROCKBOX_HAS_LOGF
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logf_panic_dump(&y);
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#endif
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lcd_update();
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DEBUGF("%s", panic_buf);
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#ifdef HAVE_ADJUSTABLE_CPU_FREQ
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if (cpu_boost_lock())
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{
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set_cpu_frequency(0);
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cpu_boost_unlock();
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}
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#endif /* HAVE_ADJUSTABLE_CPU_FREQ */
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#ifdef HAVE_ATA_POWER_OFF
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ide_power_enable(false);
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#endif
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system_exception_wait(); /* if this returns, try to reboot */
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system_reboot();
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while (1); /* halt */
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}
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