len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2025-12-08 20:55:17 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

Arm stack unwinder

Browse source 
Simplified stack unwinder for ARM. This is port of
http://www.mcternan.me.uk/ArmStackUnwinding/
backtrace() is called from UIE() on native targets
and from panicf() on both native and ARM RaaA.

Change-Id: I8e4b3c02490dd60b30aa372fe842d193b8929ce0
This commit is contained in:
Marcin Bukat 2012-01-25 09:57:59 +01:00
parent 680c6fcde1
commit b4eab59951
23 changed files with 2630 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

19
firmware/target/arm/system-arm.c
View file

@ -25,6 +25,9 @@
#include "font.h"
#include "gcc_extensions.h"
#include <get_sp.h>
#include <backtrace.h>
static const char* const uiename[] = {
"Undefined instruction",
"Prefetch abort",
@ -38,6 +41,12 @@ static const char* const uiename[] = {
*/
void NORETURN_ATTR UIE(unsigned int pc, unsigned int num)
{
/* safe guard variable - we call backtrace() only on first
* UIE call. This prevent endless loop if backtrace() touches
* memory regions which cause abort
*/
static bool triggered = false;
#if LCD_DEPTH > 1
lcd_set_backdrop(NULL);
lcd_set_drawmode(DRMODE_SOLID);
@ -49,9 +58,7 @@ void NORETURN_ATTR UIE(unsigned int pc, unsigned int num)
lcd_setfont(FONT_SYSFIXED);
lcd_set_viewport(NULL);
lcd_clear_display();
lcd_puts(0, line++, uiename[num]);
lcd_putsf(0, line++, "at %08x" IF_COP(" (%d)"), pc
IF_COP(, CURRENT_CORE));
lcd_putsf(0, line++, "%s at %08x" IF_COP(" (%d)"), uiename[num], pc IF_COP(, CURRENT_CORE));
#if !defined(CPU_ARM7TDMI) && (CONFIG_CPU != RK27XX) /* arm7tdmi has no MPU/MMU */
if(num == 1 || num == 2) /* prefetch / data abort */
@ -88,6 +95,12 @@ void NORETURN_ATTR UIE(unsigned int pc, unsigned int num)
} /* num == 1 || num == 2 // prefetch/data abort */
#endif /* !defined(CPU_ARM7TDMI */
if (!triggered)
{
triggered = true;
backtrace(pc, __get_sp(), &line);
}
lcd_update();
disable_interrupt(IRQ_FIQ_STATUS);