diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2021-06-18 16:49:26 -0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2021-06-19 11:09:10 -0700 |
| commit | 9defd1bdfb0f2ddb3ca9863e39577f3a9929d58c (patch) | |
| tree | 1d59ca926984cb76a24ee79a3a0d37ff7ff81ec9 /tcg | |
| parent | 08dff435e27dc2bc3582e3f25e7cf01956dddafc (diff) | |
tcg/sparc: Fix temp_allocate_frame vs sparc stack bias
We should not be aligning the offset in temp_allocate_frame,
because the odd offset produces an aligned address in the end.
Instead, pass the logical offset into tcg_set_frame and add
the stack bias last.
Cc: qemu-stable@nongnu.org
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/sparc/tcg-target.c.inc | 16 | ||||
| -rw-r--r-- | tcg/tcg.c | 9 |
2 files changed, 13 insertions, 12 deletions
diff --git a/tcg/sparc/tcg-target.c.inc b/tcg/sparc/tcg-target.c.inc index ce39ac2d86..a6ec94a094 100644 --- a/tcg/sparc/tcg-target.c.inc +++ b/tcg/sparc/tcg-target.c.inc @@ -984,14 +984,18 @@ static void tcg_target_qemu_prologue(TCGContext *s) { int tmp_buf_size, frame_size; - /* The TCG temp buffer is at the top of the frame, immediately - below the frame pointer. */ + /* + * The TCG temp buffer is at the top of the frame, immediately + * below the frame pointer. Use the logical (aligned) offset here; + * the stack bias is applied in temp_allocate_frame(). + */ tmp_buf_size = CPU_TEMP_BUF_NLONGS * (int)sizeof(long); - tcg_set_frame(s, TCG_REG_I6, TCG_TARGET_STACK_BIAS - tmp_buf_size, - tmp_buf_size); + tcg_set_frame(s, TCG_REG_I6, -tmp_buf_size, tmp_buf_size); - /* TCG_TARGET_CALL_STACK_OFFSET includes the stack bias, but is - otherwise the minimal frame usable by callees. */ + /* + * TCG_TARGET_CALL_STACK_OFFSET includes the stack bias, but is + * otherwise the minimal frame usable by callees. + */ frame_size = TCG_TARGET_CALL_STACK_OFFSET - TCG_TARGET_STACK_BIAS; frame_size += TCG_STATIC_CALL_ARGS_SIZE + tmp_buf_size; frame_size += TCG_TARGET_STACK_ALIGN - 1; @@ -3015,17 +3015,14 @@ static void check_regs(TCGContext *s) static void temp_allocate_frame(TCGContext *s, TCGTemp *ts) { -#if !(defined(__sparc__) && TCG_TARGET_REG_BITS == 64) - /* Sparc64 stack is accessed with offset of 2047 */ - s->current_frame_offset = (s->current_frame_offset + - (tcg_target_long)sizeof(tcg_target_long) - 1) & - ~(sizeof(tcg_target_long) - 1); -#endif if (s->current_frame_offset + (tcg_target_long)sizeof(tcg_target_long) > s->frame_end) { tcg_abort(); } ts->mem_offset = s->current_frame_offset; +#if defined(__sparc__) + ts->mem_offset += TCG_TARGET_STACK_BIAS; +#endif ts->mem_base = s->frame_temp; ts->mem_allocated = 1; s->current_frame_offset += sizeof(tcg_target_long); |