66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
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/*
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* This module, when enabled with the LUA_USE_MODULES_GDBSTUB define causes
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* the gdbstub code to be included and enabled to handle all fatal exceptions.
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* This allows you to use the lx106 gdb to catch the exception and then poke
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* around. You can continue from a break, but attempting to continue from an
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* exception usually fails.
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*
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* This should not be included in production builds as any exception will
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* put the nodemcu into a state where it is waiting for serial input and it has
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* the watchdog disabled. Good for debugging. Bad for unattended operation!
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*
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* See the docs for more information.
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*
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* Philip Gladstone, N1DQ
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*/
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#include "module.h"
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#include "lauxlib.h"
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#include "platform.h"
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#include <stdint.h>
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#include "user_interface.h"
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#include "../esp-gdbstub/gdbstub.h"
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static int init_done = 0;
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static int lgdbstub_open(lua_State *L);
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// gdbstub.brk() init gdb if nec and execute a break instructiont to entry gdb
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static int lgdbstub_break(lua_State *L) {
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lgdbstub_open(L);
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asm("break 0,0" ::);
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return 0;
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}
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// as for break but also redirect output to the debugger.
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static int lgdbstub_pbreak(lua_State *L) {
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lgdbstub_open(L);
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gdbstub_redirect_output(1);
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asm("break 0,0" ::);
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return 0;
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}
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// gdbstub.gdboutput(1) switches the output to gdb format so that gdb can display it
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static int lgdbstub_gdboutput(lua_State *L) {
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gdbstub_redirect_output(lua_toboolean(L, 1));
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return 0;
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}
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static int lgdbstub_open(lua_State *L) {
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if (init_done)
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return 0;
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gdbstub_init();
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init_done = 1;
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return 0;
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}
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// Module function map
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LROT_BEGIN(gdbstub, NULL, 0)
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LROT_FUNCENTRY( brk, lgdbstub_break )
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LROT_FUNCENTRY( pbrk, lgdbstub_pbreak )
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LROT_FUNCENTRY( gdboutput, lgdbstub_gdboutput )
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LROT_FUNCENTRY( open, lgdbstub_open )
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LROT_END(gdbstub, NULL, 0)
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NODEMCU_MODULE(GDBSTUB, "gdbstub", gdbstub, NULL);
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