| /*************************************************************************** |
| * ARM Stack Unwinder, Michael.McTernan.2001@cs.bris.ac.uk |
| * |
| * This program is PUBLIC DOMAIN. |
| * This means that there is no copyright and anyone is able to take a copy |
| * for free and use it as they wish, with or without modifications, and in |
| * any context, commercially or otherwise. The only limitation is that I |
| * don't guarantee that the software is fit for any purpose or accept any |
| * liability for it's use or misuse - this software is without warranty. |
| *************************************************************************** |
| * File Description: Unwinder client that reads local memory. |
| * This client reads from local memory and is designed to run on target |
| * along with the unwinder. Memory read requests are implemented by |
| * casting a point to read the memory directly, although checks for |
| * alignment should probably also be made if this is to be used in |
| * production code, as otherwise the ARM may return the memory in a |
| * rotated/rolled format, or the MMU may generate an alignment exception |
| * if present and so configured. |
| **************************************************************************/ |
| |
| /*************************************************************************** |
| * Includes |
| ***************************************************************************/ |
| |
| #include "backtrace.h" |
| #include "safe_read.h" |
| |
| /*************************************************************************** |
| * Prototypes |
| ***************************************************************************/ |
| |
| static Boolean CliReport(void *data, Int32 address); |
| static Boolean CliReadW(Int32 a, Int32 *v); |
| static Boolean CliReadH(Int32 a, Int16 *v); |
| static Boolean CliReadB(Int32 a, Int8 *v); |
| |
| /*************************************************************************** |
| * Variables |
| ***************************************************************************/ |
| |
| /* Table of function pointers for passing to the unwinder */ |
| const UnwindCallbacks cliCallbacks = |
| { |
| CliReport, |
| CliReadW, |
| CliReadH, |
| CliReadB |
| #if defined(UNW_DEBUG) |
| ,printf |
| #endif |
| }; |
| |
| |
| /*************************************************************************** |
| * Callbacks |
| ***************************************************************************/ |
| |
| /*************************************************************************** |
| * |
| * Function: CliReport |
| * |
| * Parameters: data - Pointer to data passed to UnwindStart() |
| * address - The return address of a stack frame. |
| * |
| * Returns: TRUE if unwinding should continue, otherwise FALSE to |
| * indicate that unwinding should stop. |
| * |
| * Description: This function is called from the unwinder each time a stack |
| * frame has been unwound. The LSB of address indicates if |
| * the processor is in ARM mode (LSB clear) or Thumb (LSB |
| * set). |
| * |
| ***************************************************************************/ |
| static Boolean CliReport(void *data, Int32 address) |
| { |
| /* CliStack *s = (CliStack *)data; */ |
| unsigned *line = (unsigned *)data; |
| |
| |
| lcd_putsf(0, (*line)++, " %c: %08x", |
| (address & 0x1) ? 'T' : 'A', |
| address & (~0x1)); |
| lcd_update(); |
| |
| return TRUE; |
| } |
| |
| static Boolean CliReadW(const Int32 a, Int32 *v) |
| { |
| return safe_read32((uint32_t *)a, (uint32_t *)v); |
| } |
| |
| static Boolean CliReadH(const Int32 a, Int16 *v) |
| { |
| return safe_read16((void *)a, (uint16_t *)v); |
| } |
| |
| static Boolean CliReadB(const Int32 a, Int8 *v) |
| { |
| return safe_read8((void *)a, (uint8_t *)v); |
| } |
| |
| Boolean CliInvalidateW(const Int32 a) |
| { |
| *(Int32 *)a = 0xdeadbeef; |
| return TRUE; |
| } |
| |
| void rb_backtrace(int pcAddr, int spAddr, unsigned *line) |
| { |
| lcd_putsf(0, (*line)++, "pc:%08x sp:%08x", pcAddr, spAddr); |
| lcd_update(); |
| |
| UnwindStart(pcAddr, spAddr, &cliCallbacks, (void *)line); |
| |
| lcd_puts(0, (*line)++, "bt end"); |
| lcd_update(); |
| } |
| |
| /* END OF FILE */ |