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authorRichard Henderson <rth@twiddle.net>2013-03-25 20:54:30 -0700
committerRichard Henderson <rth@twiddle.net>2013-04-05 13:35:40 -0500
commita4924e8bb533fb537d82a463b6465d80adaea0f5 (patch)
tree79709e97e8328438f5e4f7221a8c142dfcb5718f /tcg
parenta22971f99f4846a0947f35548b7f3f76159339f0 (diff)
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tcg-s390: Properly allocate a stack frame.
Set TCG_TARGET_CALL_STACK_OFFSET properly for the abi. Allocate the standard TCG_STATIC_CALL_ARGS_SIZE. And while we're at it, allocate space for CPU_TEMP_BUF_NLONGS. Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
-rw-r--r--tcg/s390/tcg-target.c20
-rw-r--r--tcg/s390/tcg-target.h2
2 files changed, 15 insertions, 7 deletions
diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c
index 0132010..d91b894 100644
--- a/tcg/s390/tcg-target.c
+++ b/tcg/s390/tcg-target.c
@@ -2302,17 +2302,24 @@ static void tcg_target_init(TCGContext *s)
tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
tcg_add_target_add_op_defs(s390_op_defs);
- tcg_set_frame(s, TCG_AREG0, offsetof(CPUArchState, temp_buf),
- CPU_TEMP_BUF_NLONGS * sizeof(long));
}
static void tcg_target_qemu_prologue(TCGContext *s)
{
+ tcg_target_long frame_size;
+
/* stmg %r6,%r15,48(%r15) (save registers) */
tcg_out_insn(s, RXY, STMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, 48);
- /* aghi %r15,-160 (stack frame) */
- tcg_out_insn(s, RI, AGHI, TCG_REG_R15, -160);
+ /* aghi %r15,-frame_size */
+ frame_size = TCG_TARGET_CALL_STACK_OFFSET;
+ frame_size += TCG_STATIC_CALL_ARGS_SIZE;
+ frame_size += CPU_TEMP_BUF_NLONGS * sizeof(long);
+ tcg_out_insn(s, RI, AGHI, TCG_REG_R15, -frame_size);
+
+ tcg_set_frame(s, TCG_REG_CALL_STACK,
+ TCG_STATIC_CALL_ARGS_SIZE + TCG_TARGET_CALL_STACK_OFFSET,
+ CPU_TEMP_BUF_NLONGS * sizeof(long));
if (GUEST_BASE >= 0x80000) {
tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, GUEST_BASE);
@@ -2325,8 +2332,9 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tb_ret_addr = s->code_ptr;
- /* lmg %r6,%r15,208(%r15) (restore registers) */
- tcg_out_insn(s, RXY, LMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, 208);
+ /* lmg %r6,%r15,fs+48(%r15) (restore registers) */
+ tcg_out_insn(s, RXY, LMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15,
+ frame_size + 48);
/* br %r14 (return) */
tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_REG_R14);
diff --git a/tcg/s390/tcg-target.h b/tcg/s390/tcg-target.h
index 40211e6..c6d9e84 100644
--- a/tcg/s390/tcg-target.h
+++ b/tcg/s390/tcg-target.h
@@ -100,7 +100,7 @@ typedef enum TCGReg {
/* used for function call generation */
#define TCG_REG_CALL_STACK TCG_REG_R15
#define TCG_TARGET_STACK_ALIGN 8
-#define TCG_TARGET_CALL_STACK_OFFSET 0
+#define TCG_TARGET_CALL_STACK_OFFSET 160
#define TCG_TARGET_EXTEND_ARGS 1