diff options
| author | Edgar E. Iglesias <edgar.iglesias@gmail.com> | 2012-01-10 10:27:11 +0100 |
|---|---|---|
| committer | Edgar E. Iglesias <edgar.iglesias@gmail.com> | 2012-01-12 13:54:16 +0100 |
| commit | 5818dee572deabb1e75a0901b43caa81fb30f419 (patch) | |
| tree | 98ce117e5395b85d8aef4fcc0637059586aa6f4f /target-microblaze/translate.c | |
| parent | 48b5e96f0f7006f46a7d6c6f0934a6acdda22e3b (diff) | |
microblaze: Emulate the hw stackprotector
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Diffstat (limited to 'target-microblaze/translate.c')
| -rw-r--r-- | target-microblaze/translate.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c index f4e6f3011..180ac84f0 100644 --- a/target-microblaze/translate.c +++ b/target-microblaze/translate.c @@ -526,6 +526,12 @@ static void dec_msr(DisasContext *dc) case 0x7: tcg_gen_andi_tl(cpu_SR[SR_FSR], cpu_R[dc->ra], 31); break; + case 0x800: + tcg_gen_st_tl(cpu_R[dc->ra], cpu_env, offsetof(CPUState, slr)); + break; + case 0x802: + tcg_gen_st_tl(cpu_R[dc->ra], cpu_env, offsetof(CPUState, shr)); + break; default: cpu_abort(dc->env, "unknown mts reg %x\n", sr); break; @@ -552,6 +558,12 @@ static void dec_msr(DisasContext *dc) case 0xb: tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]); break; + case 0x800: + tcg_gen_ld_tl(cpu_R[dc->rd], cpu_env, offsetof(CPUState, slr)); + break; + case 0x802: + tcg_gen_ld_tl(cpu_R[dc->rd], cpu_env, offsetof(CPUState, shr)); + break; case 0x2000: case 0x2001: case 0x2002: @@ -864,6 +876,13 @@ static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr, static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t) { unsigned int extimm = dc->tb_flags & IMM_FLAG; + /* Should be set to one if r1 is used by loadstores. */ + int stackprot = 0; + + /* All load/stores use ra. */ + if (dc->ra == 1) { + stackprot = 1; + } /* Treat the common cases first. */ if (!dc->type_b) { @@ -874,8 +893,16 @@ static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t) return &cpu_R[dc->ra]; } + if (dc->rb == 1) { + stackprot = 1; + } + *t = tcg_temp_new(); tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]); + + if (stackprot) { + gen_helper_stackprot(*t); + } return t; } /* Immediate. */ @@ -891,6 +918,9 @@ static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t) tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc))); } + if (stackprot) { + gen_helper_stackprot(*t); + } return t; } @@ -1917,6 +1947,9 @@ void cpu_reset (CPUState *env) memset(env, 0, offsetof(CPUMBState, breakpoints)); tlb_flush(env, 1); + /* Disable stack protector. */ + env->shr = ~0; + env->pvr.regs[0] = PVR0_PVR_FULL_MASK \ | PVR0_USE_BARREL_MASK \ | PVR0_USE_DIV_MASK \ |