diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2011-10-25 18:24:09 +0400 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2011-11-02 05:05:52 +0400 |
| commit | 6b814719b4ef3d69c61ec0c1d580006110b04b04 (patch) | |
| tree | d1af8ed95427686fa25d4939323adc734269c641 /target-xtensa/translate.c | |
| parent | 0c852e171b3b6073f5b05b66d8df94eda23f6dee (diff) | |
target-xtensa: raise an exception for invalid and reserved opcodes
This includes opcodes from disabled features and those marked reserved in the ISA.
Also end TB on opcodes that definitely generate an exception: illegal
instructions, syscall and privileged instructions.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'target-xtensa/translate.c')
| -rw-r--r-- | target-xtensa/translate.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c index b724d466d6..c81450d1a5 100644 --- a/target-xtensa/translate.c +++ b/target-xtensa/translate.c @@ -266,6 +266,10 @@ static void gen_exception_cause(DisasContext *dc, uint32_t cause) gen_helper_exception_cause(tpc, tcause); tcg_temp_free(tpc); tcg_temp_free(tcause); + if (cause == ILLEGAL_INSTRUCTION_CAUSE || + cause == SYSCALL_CAUSE) { + dc->is_jmp = DISAS_UPDATE; + } } static void gen_exception_cause_vaddr(DisasContext *dc, uint32_t cause, @@ -283,6 +287,7 @@ static void gen_check_privilege(DisasContext *dc) { if (dc->cring) { gen_exception_cause(dc, PRIVILEGED_CAUSE); + dc->is_jmp = DISAS_UPDATE; } } @@ -2378,7 +2383,7 @@ static void disas_xtensa_insn(DisasContext *dc) invalid_opcode: qemu_log("INVALID(pc = %08x)\n", dc->pc); - dc->pc = dc->next_pc; + gen_exception_cause(dc, ILLEGAL_INSTRUCTION_CAUSE); #undef HAS_OPTION } |