100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#if defined(__arm__) || defined(__thumb__)
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#include "backtrace.h"
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#include "unwinder.h"
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#include "unwmemaccess.h"
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#include "../../../core/serial.h"
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#include <stdarg.h>
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// Dump a backtrace entry
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static bool UnwReportOut(void* ctx, const UnwReport* bte) {
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int *p = (int*)ctx;
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(*p)++;
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SERIAL_CHAR('#'); SERIAL_PRINT(*p, DEC); SERIAL_ECHOPGM(" : ");
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SERIAL_ECHOPGM(bte->name ? bte->name : "unknown"); SERIAL_ECHOPGM("@0x"); SERIAL_PRINT(bte->function, HEX);
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SERIAL_CHAR('+'); SERIAL_PRINT(bte->address - bte->function,DEC);
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SERIAL_ECHOPGM(" PC:"); SERIAL_PRINT(bte->address,HEX); SERIAL_CHAR('\n');
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return true;
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}
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#ifdef UNW_DEBUG
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void UnwPrintf(const char* format, ...) {
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char dest[256];
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va_list argptr;
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va_start(argptr, format);
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vsprintf(dest, format, argptr);
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va_end(argptr);
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TX(&dest[0]);
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}
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#endif
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/* Table of function pointers for passing to the unwinder */
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static const UnwindCallbacks UnwCallbacks = {
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UnwReportOut,
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UnwReadW,
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UnwReadH,
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UnwReadB
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#ifdef UNW_DEBUG
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, UnwPrintf
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#endif
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};
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void backtrace() {
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UnwindFrame btf;
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uint32_t sp = 0, lr = 0, pc = 0;
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// Capture the values of the registers to perform the traceback
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__asm__ __volatile__ (
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" mov %[lrv],lr\n"
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" mov %[spv],sp\n"
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" mov %[pcv],pc\n"
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: [spv]"+r"( sp ),
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[lrv]"+r"( lr ),
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[pcv]"+r"( pc )
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::
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);
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// Fill the traceback structure
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btf.sp = sp;
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btf.fp = btf.sp;
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btf.lr = lr;
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btf.pc = pc | 1; // Force Thumb, as CORTEX only support it
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// Perform a backtrace
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SERIAL_ERROR_MSG("Backtrace:");
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int ctr = 0;
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UnwindStart(&btf, &UnwCallbacks, &ctr);
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}
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#else // !__arm__ && !__thumb__
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void backtrace() {}
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#endif
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