diff options
| author | Edgar E. Iglesias <edgar.iglesias@petalogix.com> | 2010-02-20 14:04:01 +0100 |
|---|---|---|
| committer | Edgar E. Iglesias <edgar.iglesias@gmail.com> | 2010-02-20 14:04:01 +0100 |
| commit | ff21f70afd35c3b26e4ef559c83c4a70113d1ec2 (patch) | |
| tree | 95e252dff8d14d0853fa5cd39b93d10e862b4d2f /target-microblaze/translate.c | |
| parent | e1aa325409baeefad4f214ab8c34fb21968bdb2e (diff) | |
microblaze: Improve brk emulation.
brk insns while in user mode raise priv insn exceptions.
This commit makes gdbserver work on linux guests.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
Diffstat (limited to 'target-microblaze/translate.c')
| -rw-r--r-- | target-microblaze/translate.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c index 583f09d7b4..ca54e2c30e 100644 --- a/target-microblaze/translate.c +++ b/target-microblaze/translate.c @@ -993,6 +993,7 @@ static void dec_bcc(DisasContext *dc) static void dec_br(DisasContext *dc) { unsigned int dslot, link, abs; + int mem_index = cpu_mmu_index(dc->env); dslot = dc->ir & (1 << 20); abs = dc->ir & (1 << 19); @@ -1016,11 +1017,19 @@ static void dec_br(DisasContext *dc) if (abs) { tcg_gen_movi_tl(env_btaken, 1); tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc))); - if (link && !(dc->tb_flags & IMM_FLAG) - && (dc->imm == 8 || dc->imm == 0x18)) - t_gen_raise_exception(dc, EXCP_BREAK); - if (dc->imm == 0) - t_gen_raise_exception(dc, EXCP_DEBUG); + if (link && !dslot) { + if (!(dc->tb_flags & IMM_FLAG) && (dc->imm == 8 || dc->imm == 0x18)) + t_gen_raise_exception(dc, EXCP_BREAK); + if (dc->imm == 0) { + if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) { + tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); + t_gen_raise_exception(dc, EXCP_HW_EXCP); + return; + } + + t_gen_raise_exception(dc, EXCP_DEBUG); + } + } } else { if (!dc->type_b || (dc->tb_flags & IMM_FLAG)) { tcg_gen_movi_tl(env_btaken, 1); |