97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
|
/*
|
||
|
|
* This file is part of the libpayload project.
|
||
|
|
*
|
||
|
|
* Copyright 2014 Google Inc.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. The name of the author may not be used to endorse or promote products
|
||
|
|
* derived from this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <exception.h>
|
||
|
|
#include <libpayload.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
extern unsigned int test_exc;
|
||
|
|
|
||
|
|
struct exception_handler_info
|
||
|
|
{
|
||
|
|
const char *name;
|
||
|
|
exception_hook hook;
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct exception_handler_info exceptions[EXC_COUNT] = {
|
||
|
|
[EXC_INV] = { "_invalid_exception" },
|
||
|
|
[EXC_SYNC] = { "_sync" },
|
||
|
|
[EXC_IRQ] = { "_irq" },
|
||
|
|
[EXC_FIQ] = { "_fiq" },
|
||
|
|
[EXC_SERROR] = {"_serror"}
|
||
|
|
};
|
||
|
|
|
||
|
|
static void print_regs(struct exception_state *state)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
printf("ELR = 0x%016llx ",state->elr);
|
||
|
|
printf("ESR = 0x%08llx ",state->esr);
|
||
|
|
for (i = 0; i < 31; i++) {
|
||
|
|
printf("X%02d = 0x%016llx ", i, state->regs[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void exception_dispatch(struct exception_state *state, int idx);
|
||
|
|
void exception_dispatch(struct exception_state *state, int idx)
|
||
|
|
{
|
||
|
|
if (idx >= EXC_COUNT) {
|
||
|
|
printf("Bad exception index %d.\n", idx);
|
||
|
|
} else {
|
||
|
|
struct exception_handler_info *info = &exceptions[idx];
|
||
|
|
if (info->hook) {
|
||
|
|
info->hook(idx, state);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (info->name)
|
||
|
|
printf("exception %s\n", info->name);
|
||
|
|
else
|
||
|
|
printf("exception _not_used.\n");
|
||
|
|
}
|
||
|
|
print_regs(state);
|
||
|
|
|
||
|
|
if (test_exc)
|
||
|
|
test_exc = 0;
|
||
|
|
else
|
||
|
|
halt();
|
||
|
|
}
|
||
|
|
|
||
|
|
void exception_init(void)
|
||
|
|
{
|
||
|
|
extern void* exception_table;
|
||
|
|
set_vbar(exception_table);
|
||
|
|
}
|
||
|
|
|
||
|
|
void exception_install_hook(int type, exception_hook hook)
|
||
|
|
{
|
||
|
|
die_if(type >= EXC_COUNT, "Out of bounds exception index %d.\n", type);
|
||
|
|
exceptions[type].hook = hook;
|
||
|
|
}
|