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tcg: Add tcg_out_tb_start backend hook

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This hook may emit code at the beginning of the TB.

Suggested-by: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-08-15 16:34:59 +00:00
parent 722460652b
commit 9358fbbf6e
11 changed files with 53 additions and 0 deletions
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5
tcg/aarch64/tcg-target.c.inc
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@ -3135,6 +3135,11 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out_insn(s, 3207, RET, TCG_REG_LR);
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
{
int i;

5
tcg/arm/tcg-target.c.inc
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@ -2962,6 +2962,11 @@ static void tcg_out_epilogue(TCGContext *s)
(1 << TCG_REG_R10) | (1 << TCG_REG_R11) | (1 << TCG_REG_PC));
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
typedef struct {
DebugFrameHeader h;
uint8_t fde_def_cfa[4];

5
tcg/i386/tcg-target.c.inc
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@ -4191,6 +4191,11 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out_opc(s, OPC_RET, 0, 0, 0);
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
{
memset(p, 0x90, count);

5
tcg/loongarch64/tcg-target.c.inc
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@ -2296,6 +2296,11 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out_opc_jirl(s, TCG_REG_ZERO, TCG_REG_RA, 0);
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
static void tcg_target_init(TCGContext *s)
{
unsigned long hwcap = qemu_getauxval(AT_HWCAP);

5
tcg/mips/tcg-target.c.inc
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@ -2628,6 +2628,11 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out_opc_reg(s, OPC_OR, TCG_TMP3, TCG_TMP3, TCG_TMP1);
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
static void tcg_target_init(TCGContext *s)
{
tcg_target_detect_isa();

5
tcg/ppc/tcg-target.c.inc
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@ -2527,6 +2527,11 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out32(s, BCLR | BO_ALWAYS);
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
static void tcg_out_exit_tb(TCGContext *s, uintptr_t arg)
{
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R3, arg);

5
tcg/riscv/tcg-target.c.inc
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@ -2099,6 +2099,11 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_RA, 0);
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
static volatile sig_atomic_t got_sigill;
static void sigill_handler(int signo, siginfo_t *si, void *data)

5
tcg/s390x/tcg-target.c.inc
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@ -3483,6 +3483,11 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_REG_R14);
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
{
memset(p, 0x07, count * sizeof(tcg_insn_unit));

5
tcg/sparc64/tcg-target.c.inc
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@ -962,6 +962,11 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out_movi_s13(s, TCG_REG_O0, 0);
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
{
int i;

3
tcg/tcg.c
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@ -108,6 +108,7 @@ static void tcg_register_jit_int(const void *buf, size_t size,
__attribute__((unused));
/* Forward declarations for functions declared and used in tcg-target.c.inc. */
static void tcg_out_tb_start(TCGContext *s);
static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg1,
intptr_t arg2);
static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg);
@ -6014,6 +6015,8 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb, uint64_t pc_start)
s->gen_insn_data =
tcg_malloc(sizeof(uint64_t) * s->gen_tb->icount * start_words);
tcg_out_tb_start(s);
num_insns = -1;
QTAILQ_FOREACH(op, &s->ops, link) {
TCGOpcode opc = op->opc;

5
tcg/tci/tcg-target.c.inc
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@ -955,6 +955,11 @@ static inline void tcg_target_qemu_prologue(TCGContext *s)
{
}
static void tcg_out_tb_start(TCGContext *s)
{
/* nothing to do */
}
bool tcg_target_has_memory_bswap(MemOp memop)
{
return true;