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Diffstat (limited to 'payloads/libpayload/arch/arm64/exception.c')
| -rw-r--r-- | payloads/libpayload/arch/arm64/exception.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/payloads/libpayload/arch/arm64/exception.c b/payloads/libpayload/arch/arm64/exception.c new file mode 100644 index 0000000000..988bef9ed4 --- /dev/null +++ b/payloads/libpayload/arch/arm64/exception.c @@ -0,0 +1,96 @@ +/* + * 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; +} |