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tcg-aarch64: Implement tcg_register_jit 

Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
master
Richard Henderson 2014-03-14 21:33:29 -04:00 committed by Richard Henderson
parent 95f72aa90a
commit 38d195aa05
1 changed files with 69 additions and 15 deletions
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84
tcg/aarch64/tcg-target.c
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@ -1848,24 +1848,29 @@ static void tcg_target_init(TCGContext *s)
tcg_add_target_add_op_defs(aarch64_op_defs);
}
/* Saving pairs: (X19, X20) .. (X27, X28), (X29(fp), X30(lr)). */
#define PUSH_SIZE ((30 - 19 + 1) * 8)
#define FRAME_SIZE \
((PUSH_SIZE \
+ TCG_STATIC_CALL_ARGS_SIZE \
+ CPU_TEMP_BUF_NLONGS * sizeof(long) \
+ TCG_TARGET_STACK_ALIGN - 1) \
& ~(TCG_TARGET_STACK_ALIGN - 1))
/* We're expecting a 2 byte uleb128 encoded value. */
QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14));
/* We're expecting to use a single ADDI insn. */
QEMU_BUILD_BUG_ON(FRAME_SIZE - PUSH_SIZE > 0xfff);
static void tcg_target_qemu_prologue(TCGContext *s)
{
/* NB: frame sizes are in 16 byte stack units! */
int frame_size_callee_saved, frame_size_tcg_locals;
TCGReg r;
/* save pairs (FP, LR) and (X19, X20) .. (X27, X28) */
frame_size_callee_saved = 16 + (TCG_REG_X28 - TCG_REG_X19 + 1) * 8;
/* frame size requirement for TCG local variables */
frame_size_tcg_locals = TCG_STATIC_CALL_ARGS_SIZE
+ CPU_TEMP_BUF_NLONGS * sizeof(long)
+ (TCG_TARGET_STACK_ALIGN - 1);
frame_size_tcg_locals &= ~(TCG_TARGET_STACK_ALIGN - 1);
/* Push (FP, LR) and allocate space for all saved registers. */
tcg_out_insn(s, 3314, STP, TCG_REG_FP, TCG_REG_LR,
TCG_REG_SP, -frame_size_callee_saved, 1, 1);
TCG_REG_SP, -PUSH_SIZE, 1, 1);
/* Set up frame pointer for canonical unwinding. */
tcg_out_movr_sp(s, TCG_TYPE_I64, TCG_REG_FP, TCG_REG_SP);
@ -1878,7 +1883,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
/* Make stack space for TCG locals. */
tcg_out_insn(s, 3401, SUBI, TCG_TYPE_I64, TCG_REG_SP, TCG_REG_SP,
frame_size_tcg_locals);
FRAME_SIZE - PUSH_SIZE);
/* Inform TCG about how to find TCG locals with register, offset, size. */
tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE,
@ -1898,7 +1903,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
/* Remove TCG locals stack space. */
tcg_out_insn(s, 3401, ADDI, TCG_TYPE_I64, TCG_REG_SP, TCG_REG_SP,
frame_size_tcg_locals);
FRAME_SIZE - PUSH_SIZE);
/* Restore registers x19..x28. */
for (r = TCG_REG_X19; r <= TCG_REG_X27; r += 2) {
@ -1908,6 +1913,55 @@ static void tcg_target_qemu_prologue(TCGContext *s)
/* Pop (FP, LR), restore SP to previous frame. */
tcg_out_insn(s, 3314, LDP, TCG_REG_FP, TCG_REG_LR,
TCG_REG_SP, frame_size_callee_saved, 0, 1);
TCG_REG_SP, PUSH_SIZE, 0, 1);
tcg_out_insn(s, 3207, RET, TCG_REG_LR);
}
typedef struct {
DebugFrameCIE cie;
DebugFrameFDEHeader fde;
uint8_t fde_def_cfa[4];
uint8_t fde_reg_ofs[24];
} DebugFrame;
#define ELF_HOST_MACHINE EM_AARCH64
static DebugFrame debug_frame = {
.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */
.cie.id = -1,
.cie.version = 1,
.cie.code_align = 1,
.cie.data_align = 0x78, /* sleb128 -8 */
.cie.return_column = TCG_REG_LR,
/* Total FDE size does not include the "len" member. */
.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, fde.cie_offset),
.fde_def_cfa = {
12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */
(FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */
(FRAME_SIZE >> 7)
},
.fde_reg_ofs = {
0x80 + 28, 1, /* DW_CFA_offset, x28, -8 */
0x80 + 27, 2, /* DW_CFA_offset, x27, -16 */
0x80 + 26, 3, /* DW_CFA_offset, x26, -24 */
0x80 + 25, 4, /* DW_CFA_offset, x25, -32 */
0x80 + 24, 5, /* DW_CFA_offset, x24, -40 */
0x80 + 23, 6, /* DW_CFA_offset, x23, -48 */
0x80 + 22, 7, /* DW_CFA_offset, x22, -56 */
0x80 + 21, 8, /* DW_CFA_offset, x21, -64 */
0x80 + 20, 9, /* DW_CFA_offset, x20, -72 */
0x80 + 19, 10, /* DW_CFA_offset, x1p, -80 */
0x80 + 30, 11, /* DW_CFA_offset, lr, -88 */
0x80 + 29, 12, /* DW_CFA_offset, fp, -96 */
}
};
void tcg_register_jit(void *buf, size_t buf_size)
{
debug_frame.fde.func_start = (intptr_t)buf;
debug_frame.fde.func_len = buf_size;
tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
}