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[Qemu-arm] [PATCH v4 08/11] target/i386: introduce gen_jr helper to gene
From: |
Emilio G. Cota |
Subject: |
[Qemu-arm] [PATCH v4 08/11] target/i386: introduce gen_jr helper to generate lookup_and_goto_ptr |
Date: |
Wed, 26 Apr 2017 23:29:21 -0400 |
This helper will be used by subsequent changes.
Signed-off-by: Emilio G. Cota <address@hidden>
---
target/i386/translate.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/target/i386/translate.c b/target/i386/translate.c
index 1d1372f..f0e48dc 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -141,6 +141,7 @@ typedef struct DisasContext {
} DisasContext;
static void gen_eob(DisasContext *s);
+static void gen_jr(DisasContext *s, TCGv dest);
static void gen_jmp(DisasContext *s, target_ulong eip);
static void gen_jmp_tb(DisasContext *s, target_ulong eip, int tb_num);
static void gen_op(DisasContext *s1, int op, TCGMemOp ot, int d);
@@ -2509,7 +2510,8 @@ static void gen_bnd_jmp(DisasContext *s)
If INHIBIT, set HF_INHIBIT_IRQ_MASK if it isn't already set.
If RECHECK_TF, emit a rechecking helper for #DB, ignoring the state of
S->TF. This is used by the syscall/sysret insns. */
-static void gen_eob_worker(DisasContext *s, bool inhibit, bool recheck_tf)
+static void
+do_gen_eob_worker(DisasContext *s, bool inhibit, bool recheck_tf, TCGv jr)
{
gen_update_cc_op(s);
@@ -2530,12 +2532,27 @@ static void gen_eob_worker(DisasContext *s, bool
inhibit, bool recheck_tf)
tcg_gen_exit_tb(0);
} else if (s->tf) {
gen_helper_single_step(cpu_env);
+ } else if (!TCGV_IS_UNUSED(jr)) {
+ TCGv vaddr = tcg_temp_new();
+
+ tcg_gen_add_tl(vaddr, jr, cpu_seg_base[R_CS]);
+ tcg_gen_lookup_and_goto_ptr(vaddr);
+ tcg_temp_free(vaddr);
} else {
tcg_gen_exit_tb(0);
}
s->is_jmp = DISAS_TB_JUMP;
}
+static inline void
+gen_eob_worker(DisasContext *s, bool inhibit, bool recheck_tf)
+{
+ TCGv unused;
+
+ TCGV_UNUSED(unused);
+ do_gen_eob_worker(s, inhibit, recheck_tf, unused);
+}
+
/* End of block.
If INHIBIT, set HF_INHIBIT_IRQ_MASK if it isn't already set. */
static void gen_eob_inhibit_irq(DisasContext *s, bool inhibit)
@@ -2549,6 +2566,12 @@ static void gen_eob(DisasContext *s)
gen_eob_worker(s, false, false);
}
+/* Jump to register */
+static void gen_jr(DisasContext *s, TCGv dest)
+{
+ do_gen_eob_worker(s, false, false, dest);
+}
+
/* generate a jump to eip. No segment change must happen before as a
direct call to the next block may occur */
static void gen_jmp_tb(DisasContext *s, target_ulong eip, int tb_num)
--
2.7.4
- [Qemu-arm] [PATCH v4 00/11] TCG optimizations for 2.10, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 06/11] target/arm: optimize cross-page direct jumps in softmmu, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 08/11] target/i386: introduce gen_jr helper to generate lookup_and_goto_ptr,
Emilio G. Cota <=
- [Qemu-arm] [PATCH v4 01/11] exec-all: export tb_htable_lookup, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 11/11] tb-hash: improve tb_jmp_cache hash function in user mode, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 09/11] target/i386: optimize cross-page direct jumps in softmmu, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 04/11] tcg: export tcg_gen_lookup_and_goto_ptr, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 02/11] tcg-runtime: add lookup_tb_ptr helper, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 03/11] tcg: introduce goto_ptr opcode, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 05/11] tcg/i386: implement goto_ptr op, Emilio G. Cota, 2017/04/26
- [Qemu-arm] [PATCH v4 07/11] target/arm: optimize indirect branches, Emilio G. Cota, 2017/04/26