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tcg: Introduce get_jmp_target_addr 

Similar to the existing set_jmp_reset_offset.  Include the
rw->rx address space conversion done by arm and s390x, and
forgotten by mips and riscv.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-11-26 17:42:11 -08:00
parent b52a2c03b7
commit becc452a36
5 changed files with 13 additions and 4 deletions
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2
tcg/arm/tcg-target.c.inc
View File

@ -1954,7 +1954,7 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
TCGReg base = TCG_REG_PC;
qemu_build_assert(!TCG_TARGET_HAS_direct_jump);
ptr = (intptr_t)tcg_splitwx_to_rx(s->tb_jmp_target_addr + args[0]);
ptr = get_jmp_target_addr(s, args[0]);
dif = tcg_pcrel_diff(s, (void *)ptr) - 8;
dil = sextract32(dif, 0, 12);
if (dif != dil) {

2
tcg/mips/tcg-target.c.inc
View File

@ -1989,7 +1989,7 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
/* indirect jump method */
qemu_build_assert(!TCG_TARGET_HAS_direct_jump);
tcg_out_ld(s, TCG_TYPE_PTR, TCG_TMP0, TCG_REG_ZERO,
(uintptr_t)(s->tb_jmp_target_addr + a0));
get_jmp_target_addr(s, a0));
tcg_out_opc_reg(s, OPC_JR, 0, TCG_TMP0, 0);
tcg_out_nop(s);
set_jmp_reset_offset(s, a0);

2
tcg/riscv/tcg-target.c.inc
View File

@ -1314,7 +1314,7 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
qemu_build_assert(!TCG_TARGET_HAS_direct_jump);
/* indirect jump method */
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_REG_ZERO,
(uintptr_t)(s->tb_jmp_target_addr + a0));
get_jmp_target_addr(s, a0));
tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_TMP0, 0);
set_jmp_reset_offset(s, a0);
break;

9
tcg/tcg.c
View File

@ -323,6 +323,15 @@ static void G_GNUC_UNUSED set_jmp_insn_offset(TCGContext *s, int which)
s->tb_jmp_insn_offset[which] = tcg_current_code_size(s);
}
static uintptr_t G_GNUC_UNUSED get_jmp_target_addr(TCGContext *s, int which)
{
/*
* Return the read-execute version of the pointer, for the benefit
* of any pc-relative addressing mode.
*/
return (uintptr_t)tcg_splitwx_to_rx(&s->tb_jmp_target_addr[which]);
}
/* Signal overflow, starting over with fewer guest insns. */
static G_NORETURN
void tcg_raise_tb_overflow(TCGContext *s)

2
tcg/tci/tcg-target.c.inc
View File

@ -605,7 +605,7 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
case INDEX_op_goto_tb:
qemu_build_assert(!TCG_TARGET_HAS_direct_jump);
/* indirect jump method. */
tcg_out_op_p(s, opc, s->tb_jmp_target_addr + args[0]);
tcg_out_op_p(s, opc, (void *)get_jmp_target_addr(s, args[0]));
set_jmp_reset_offset(s, args[0]);
break;