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tcg-s390: Properly allocate a stack frame.

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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>
This commit is contained in:
Richard Henderson 2013-03-25 20:54:30 -07:00
parent a22971f99f
commit a4924e8bb5
2 changed files with 15 additions and 7 deletions
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20
tcg/s390/tcg-target.c
View File

@ -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);

2
tcg/s390/tcg-target.h
View File

@ -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