From f72fa1dcc964498d5f8a0fdf35d0447b76f3ae45 Mon Sep 17 00:00:00 2001 From: "Edgar E. Iglesias" Date: Sat, 20 Feb 2010 14:04:01 +0100 Subject: [PATCH] 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 --- target-microblaze/translate.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c index 583f09d..ca54e2c 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); -- 2.7.4