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/*
* 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;
};
static exception_hook hook;
struct exception_state *exception_state;
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)
{
exception_state = state;
if (idx >= EXC_COUNT) {
printf("Bad exception index %d.\n", idx);
} else {
struct exception_handler_info *info = &exceptions[idx];
if (hook && hook(idx))
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(exception_hook h)
{
die_if(hook, "Implement support for a list of hooks if you need it.");
hook = h;
}
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