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[29/50] target/i386: Add stub generator for helper_set_dr

Message ID 20210228232321.322053-30-richard.henderson@linaro.org
State Superseded
Headers show
Series i386 cleanup part 3 | expand

Commit Message

Richard Henderson Feb. 28, 2021, 11:23 p.m. UTC 
This removes an ifdef from the middle of disas_insn,
and ensures that the branch is not reachable.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

---
 target/i386/tcg/translate.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

-- 
2.25.1
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Patch

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index f0bc2df98c..42b96a2669 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -179,6 +179,19 @@  typedef struct DisasContext {
 #define REX_B(S)       0
 #endif
 
+/*
+ * Many sysemu-only helpers are not reachable for user-only.
+ * Define stub generators here, so that we need not either sprinkle
+ * ifdefs through the translator, nor provide the helper function.
+ */
+#define STUB_HELPER(NAME, ...) \
+    static inline void gen_helper_##NAME(__VA_ARGS__) \
+    { qemu_build_not_reached(); }
+
+#ifdef CONFIG_USER_ONLY
+STUB_HELPER(set_dr, TCGv_env env, TCGv_i32 reg, TCGv val)
+#endif
+
 static void gen_eob(DisasContext *s);
 static void gen_jr(DisasContext *s, TCGv dest);
 static void gen_jmp(DisasContext *s, target_ulong eip);
@@ -8069,7 +8082,6 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
     case 0x121: /* mov reg, drN */
     case 0x123: /* mov drN, reg */
         if (check_cpl0(s)) {
-#ifndef CONFIG_USER_ONLY
             modrm = x86_ldub_code(env, s);
             /* Ignore the mod bits (assume (modrm&0xc0)==0xc0).
              * AMD documentation (24594.pdf) and testing of
@@ -8098,7 +8110,6 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
                 gen_helper_get_dr(s->T0, cpu_env, s->tmp2_i32);
                 gen_op_mov_reg_v(s, ot, rm, s->T0);
             }
-#endif /* !CONFIG_USER_ONLY */
         }
         break;
     case 0x106: /* clts */