Revision 6fd70712f31bce3937f20733d82e36d352c716c9 authored by Daniel Fort on 11 March 2018, 00:45:22 UTC, committed by Daniel Fort on 11 March 2018, 00:45:22 UTC
1 parent e2534a1
tp-spy.c
/**
* Attempt to intercept all TryPostEvent calls
*
* Usage:
*
* 1) Make sure the cache hack is working.
* For example, add this in boot-hack.c:
* // Make sure that our self-modifying code clears the cache
* clean_d_cache();
* flush_caches();
* + cache_lock();
*
*
* 2) call "tp_intercept" from "don't click me"
*
**/
#include "tp-spy.h"
#include "dryos.h"
#include "bmp.h"
#if !defined(CONFIG_DIGIC_V) //Digic V have this stuff inside RAM already
#include "cache_hacks.h"
#endif
unsigned int BUFF_SIZE = (1024*1024);
static char *tp_buf = 0;
static int tp_len = 0;
extern thunk TryPostEvent;
extern thunk TryPostEvent_end;
extern thunk TryPostStageEvent;
extern thunk TryPostStageEvent_end;
#define reloc_start ((uintptr_t)&TryPostEvent)
#define reloc_end ((uintptr_t)&TryPostEvent_end)
#define reloc_tp_len (reloc_end - reloc_start)
#define reloc_start2 ((uintptr_t)&TryPostStageEvent)
#define reloc_end2 ((uintptr_t)&TryPostStageEvent_end)
#define reloc_tp_len2 (reloc_end2 - reloc_start2)
static uintptr_t reloc_tp_buf = 0;
static uintptr_t reloc_tp_buf2 = 0;
static int (*new_TryPostEvent)(int taskclass, int obj, int event, int arg1, int arg2) = 0;
static int (*new_TryPostStageEvent)(int taskclass, int obj, int event, int arg1, int arg2) = 0;
static char callstack[100];
char* get_call_stack()
{
uintptr_t sp = 0;
asm __volatile__ (
"mov %0, %%sp"
: "=&r"(sp)
);
callstack[0] = 0;
for (int i = 0; i < 100; i++)
{
if ((MEM(sp+i*4) & 0xFF000000) == 0xFF000000)
{
STR_APPEND(callstack, "%x ", MEM(sp+i*4));
}
}
return callstack;
}
volatile int in_trypostevent = 0;
int my_TryPostEvent(int taskclass, int obj, int event, int arg3, int arg4)
{ tp_len += snprintf(tp_buf + tp_len, BUFF_SIZE - tp_len, "*** TryPostEvent(%x, %x '%s', %x, %x, %x)\n", taskclass, obj, MEM(obj), event, arg3, arg4);
return new_TryPostEvent(taskclass, obj, event, arg3, arg4);
}
int my_TryPostStageEvent(int taskclass, int obj, int event, int arg3, int arg4)
{ tp_len += snprintf(tp_buf + tp_len, BUFF_SIZE - tp_len, "*** TryPostStageEvent(%x, %x '%s', %x, %x, %x)\n", taskclass, obj, MEM(obj), event, arg3, arg4);
return new_TryPostStageEvent(taskclass, obj, event, arg3, arg4);
}
void tp_intercept()
{
if (!tp_buf) // first call, intercept debug messages
{
tp_buf = fio_malloc(BUFF_SIZE);
tp_len = 0;
if (!reloc_tp_buf) reloc_tp_buf = (uintptr_t) malloc(reloc_tp_len + 64);
if (!reloc_tp_buf2) reloc_tp_buf2 = (uintptr_t) malloc(reloc_tp_len2 + 64);
new_TryPostEvent = (void *)reloc(
0, // we have physical memory
0, // with no virtual offset
reloc_start,
reloc_end,
reloc_tp_buf
);
new_TryPostStageEvent = (void *)reloc(
0, // we have physical memory
0, // with no virtual offset
reloc_start2,
reloc_end2,
reloc_tp_buf2
);
#if defined(CONFIG_DIGIC_V)
uint32_t d = (uint32_t)&TryPostEvent;
*(uint32_t*)(d) = B_INSTR((uint32_t)&TryPostEvent, my_TryPostEvent);
uint32_t e = (uint32_t)&TryPostStageEvent;
*(uint32_t*)(e) = B_INSTR((uint32_t)&TryPostStageEvent, my_TryPostStageEvent);
#else
cache_fake((uint32_t)&TryPostEvent, B_INSTR((uint32_t)&TryPostEvent, my_TryPostEvent), TYPE_ICACHE);
cache_fake((uint32_t)&TryPostStageEvent, B_INSTR((uint32_t)&TryPostStageEvent, my_TryPostStageEvent), TYPE_ICACHE);
#endif
NotifyBox(2000, "Now logging... ALL TryPostEvent's :)");
} else // subsequent call, save log to file
{
tp_buf[tp_len] = 0;
dump_seg(tp_buf, tp_len, "tp.log");
NotifyBox(2000, "Saved %d bytes.", tp_len);
tp_len = 0;
}
}
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