Leave TARGET_ALIGNED_ONLY set, but use the new CPUState
flag to set MO_UNALN for the instructions that the kernel
handles in the unaligned trap.
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
target/alpha/cpu.h | 5 +++++
hw/core/cpu-user.c | 2 +-
linux-user/syscall.c | 2 +-
target/alpha/translate.c | 31 ++++++++++++++++++++++---------
4 files changed, 29 insertions(+), 11 deletions(-)
diff --git a/target/alpha/cpu.h b/target/alpha/cpu.h
index 6eb3fcc63e..d9099ea188 100644
--- a/target/alpha/cpu.h
+++ b/target/alpha/cpu.h
@@ -387,6 +387,8 @@ enum {
#define ENV_FLAG_TB_MASK \
(ENV_FLAG_PAL_MODE | ENV_FLAG_PS_USER | ENV_FLAG_FEN)
+#define TB_FLAG_UNALIGN (1u << 1)
+
static inline int cpu_mmu_index(CPUAlphaState *env, bool ifetch)
{
int ret = env->flags & ENV_FLAG_PS_USER ? MMU_USER_IDX : MMU_KERNEL_IDX;
@@ -469,6 +471,9 @@ static inline void cpu_get_tb_cpu_state(CPUAlphaState *env,
target_ulong *pc,
*pc = env->pc;
*cs_base = 0;
*pflags = env->flags & ENV_FLAG_TB_MASK;
+#ifdef CONFIG_USER_ONLY
+ *pflags |= TB_FLAG_UNALIGN * !env_cpu(env)->prctl_unalign_sigbus;
+#endif
}
#ifdef CONFIG_USER_ONLY
diff --git a/hw/core/cpu-user.c b/hw/core/cpu-user.c
index 23786865cb..daf8ff59b5 100644
--- a/hw/core/cpu-user.c
+++ b/hw/core/cpu-user.c
@@ -24,7 +24,7 @@ static Property cpu_useronly_props[] = {
* up its memory. The default if no link is set up is to use the
* system address space.
*/
-#if 0
+#if defined(TARGET_ALPHA)
DEFINE_PROP_BOOL("prctl-unalign-sigbus", CPUState,
prctl_unalign_sigbus, false),
#endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index b2e3c28b41..15080d0539 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6644,7 +6644,7 @@ static abi_long do_prctl(CPUArchState *env, abi_long
option, abi_long arg2,
* We only implement PR_UNALIGN_SIGBUS, and only for those targets
* who have had their translator updated to insert MO_ALIGN.
*/
-#if 0
+#if defined(TARGET_ALPHA)
case PR_GET_UNALIGN:
{
CPUState *cs = env_cpu(env);
diff --git a/target/alpha/translate.c b/target/alpha/translate.c
index c14c1156a0..f6ba6a1a59 100644
--- a/target/alpha/translate.c
+++ b/target/alpha/translate.c
@@ -45,7 +45,9 @@ typedef struct DisasContext DisasContext;
struct DisasContext {
DisasContextBase base;
-#ifndef CONFIG_USER_ONLY
+#ifdef CONFIG_USER_ONLY
+ MemOp unalign;
+#else
uint64_t palbr;
#endif
uint32_t tbflags;
@@ -68,6 +70,12 @@ struct DisasContext {
TCGv sink;
};
+#ifdef CONFIG_USER_ONLY
+#define UNALIGN(C) (C)->unalign
+#else
+#define UNALIGN(C) 0
+#endif
+
/* Target-specific return values from translate_one, indicating the
state of the TB. Note that DISAS_NEXT indicates that we are not
exiting the TB. */
@@ -270,7 +278,7 @@ static inline DisasJumpType gen_invalid(DisasContext *ctx)
static void gen_ldf(DisasContext *ctx, TCGv dest, TCGv addr)
{
TCGv_i32 tmp32 = tcg_temp_new_i32();
- tcg_gen_qemu_ld_i32(tmp32, addr, ctx->mem_idx, MO_LEUL);
+ tcg_gen_qemu_ld_i32(tmp32, addr, ctx->mem_idx, MO_LEUL | UNALIGN(ctx));
gen_helper_memory_to_f(dest, tmp32);
tcg_temp_free_i32(tmp32);
}
@@ -278,7 +286,7 @@ static void gen_ldf(DisasContext *ctx, TCGv dest, TCGv addr)
static void gen_ldg(DisasContext *ctx, TCGv dest, TCGv addr)
{
TCGv tmp = tcg_temp_new();
- tcg_gen_qemu_ld_i64(tmp, addr, ctx->mem_idx, MO_LEQ);
+ tcg_gen_qemu_ld_i64(tmp, addr, ctx->mem_idx, MO_LEQ | UNALIGN(ctx));
gen_helper_memory_to_g(dest, tmp);
tcg_temp_free(tmp);
}
@@ -286,14 +294,14 @@ static void gen_ldg(DisasContext *ctx, TCGv dest, TCGv
addr)
static void gen_lds(DisasContext *ctx, TCGv dest, TCGv addr)
{
TCGv_i32 tmp32 = tcg_temp_new_i32();
- tcg_gen_qemu_ld_i32(tmp32, addr, ctx->mem_idx, MO_LEUL);
+ tcg_gen_qemu_ld_i32(tmp32, addr, ctx->mem_idx, MO_LEUL | UNALIGN(ctx));
gen_helper_memory_to_s(dest, tmp32);
tcg_temp_free_i32(tmp32);
}
static void gen_ldt(DisasContext *ctx, TCGv dest, TCGv addr)
{
- tcg_gen_qemu_ld_i64(dest, addr, ctx->mem_idx, MO_LEQ);
+ tcg_gen_qemu_ld_i64(dest, addr, ctx->mem_idx, MO_LEQ | UNALIGN(ctx));
}
static void gen_load_fp(DisasContext *ctx, int ra, int rb, int32_t disp16,
@@ -324,6 +332,8 @@ static void gen_load_int(DisasContext *ctx, int ra, int rb,
int32_t disp16,
tcg_gen_addi_i64(addr, load_gpr(ctx, rb), disp16);
if (clear) {
tcg_gen_andi_i64(addr, addr, ~0x7);
+ } else if (!locked) {
+ op |= UNALIGN(ctx);
}
dest = ctx->ir[ra];
@@ -340,7 +350,7 @@ static void gen_stf(DisasContext *ctx, TCGv src, TCGv addr)
{
TCGv_i32 tmp32 = tcg_temp_new_i32();
gen_helper_f_to_memory(tmp32, addr);
- tcg_gen_qemu_st_i32(tmp32, addr, ctx->mem_idx, MO_LEUL);
+ tcg_gen_qemu_st_i32(tmp32, addr, ctx->mem_idx, MO_LEUL | UNALIGN(ctx));
tcg_temp_free_i32(tmp32);
}
@@ -348,7 +358,7 @@ static void gen_stg(DisasContext *ctx, TCGv src, TCGv addr)
{
TCGv tmp = tcg_temp_new();
gen_helper_g_to_memory(tmp, src);
- tcg_gen_qemu_st_i64(tmp, addr, ctx->mem_idx, MO_LEQ);
+ tcg_gen_qemu_st_i64(tmp, addr, ctx->mem_idx, MO_LEQ | UNALIGN(ctx));
tcg_temp_free(tmp);
}
@@ -356,13 +366,13 @@ static void gen_sts(DisasContext *ctx, TCGv src, TCGv
addr)
{
TCGv_i32 tmp32 = tcg_temp_new_i32();
gen_helper_s_to_memory(tmp32, src);
- tcg_gen_qemu_st_i32(tmp32, addr, ctx->mem_idx, MO_LEUL);
+ tcg_gen_qemu_st_i32(tmp32, addr, ctx->mem_idx, MO_LEUL | UNALIGN(ctx));
tcg_temp_free_i32(tmp32);
}
static void gen_stt(DisasContext *ctx, TCGv src, TCGv addr)
{
- tcg_gen_qemu_st_i64(src, addr, ctx->mem_idx, MO_LEQ);
+ tcg_gen_qemu_st_i64(src, addr, ctx->mem_idx, MO_LEQ | UNALIGN(ctx));
}
static void gen_store_fp(DisasContext *ctx, int ra, int rb, int32_t disp16,
@@ -383,6 +393,8 @@ static void gen_store_int(DisasContext *ctx, int ra, int
rb, int32_t disp16,
tcg_gen_addi_i64(addr, load_gpr(ctx, rb), disp16);
if (clear) {
tcg_gen_andi_i64(addr, addr, ~0x7);
+ } else {
+ op |= UNALIGN(ctx);
}
src = load_gpr(ctx, ra);
@@ -2942,6 +2954,7 @@ static void alpha_tr_init_disas_context(DisasContextBase
*dcbase, CPUState *cpu)
#ifdef CONFIG_USER_ONLY
ctx->ir = cpu_std_ir;
+ ctx->unalign = (ctx->tbflags & TB_FLAG_UNALIGN ? MO_UNALN : MO_ALIGN);
#else
ctx->palbr = env->palbr;
ctx->ir = (ctx->tbflags & ENV_FLAG_PAL_MODE ? cpu_pal_ir : cpu_std_ir);
--
2.25.1
