diff mbox series

[v2,03/23] target/i386: Remove cur_eip argument to gen_exception

Message ID 20220906100932.343523-4-richard.henderson@linaro.org
State Superseded
Headers show
Series target/i386: pc-relative translation blocks | expand

Commit Message

Richard Henderson Sept. 6, 2022, 10:09 a.m. UTC 
All callers pass s->base.pc_next - s->cs_base, which we can just
as well compute within the function.  Note the special case of
EXCP_VSYSCALL in which s->cs_base didn't have the subtraction,
but cs_base is always zero in 64-bit mode, when vsyscall is used.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/i386/tcg/translate.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

Comments

Philippe Mathieu-Daudé Sept. 6, 2022, 2:44 p.m. UTC | #1 
On 6/9/22 12:09, Richard Henderson wrote:
> All callers pass s->base.pc_next - s->cs_base, which we can just
> as well compute within the function.  Note the special case of
> EXCP_VSYSCALL in which s->cs_base didn't have the subtraction,
> but cs_base is always zero in 64-bit mode, when vsyscall is used.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/i386/tcg/translate.c | 26 +++++++++++++-------------
>   1 file changed, 13 insertions(+), 13 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Paolo Bonzini Sept. 21, 2022, 11:51 a.m. UTC | #2 
On Tue, Sep 6, 2022 at 4:45 PM Philippe Mathieu-Daudé <f4bug@amsat.org> wrote:
>
> On 6/9/22 12:09, Richard Henderson wrote:
> > All callers pass s->base.pc_next - s->cs_base, which we can just
> > as well compute within the function.  Note the special case of
> > EXCP_VSYSCALL in which s->cs_base didn't have the subtraction,
> > but cs_base is always zero in 64-bit mode, when vsyscall is used.
> >
> > Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> > ---
> >   target/i386/tcg/translate.c | 26 +++++++++++++-------------
> >   1 file changed, 13 insertions(+), 13 deletions(-)

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
diff mbox series

Patch

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 46300ffd91..58e74c3162 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -1332,10 +1332,10 @@  static void gen_helper_fp_arith_STN_ST0(int op, int opreg)
     }
 }
 
-static void gen_exception(DisasContext *s, int trapno, target_ulong cur_eip)
+static void gen_exception(DisasContext *s, int trapno)
 {
     gen_update_cc_op(s);
-    gen_jmp_im(s, cur_eip);
+    gen_jmp_im(s, s->base.pc_next - s->cs_base);
     gen_helper_raise_exception(cpu_env, tcg_const_i32(trapno));
     s->base.is_jmp = DISAS_NORETURN;
 }
@@ -1344,13 +1344,13 @@  static void gen_exception(DisasContext *s, int trapno, target_ulong cur_eip)
    the instruction is known, but it isn't allowed in the current cpu mode.  */
 static void gen_illegal_opcode(DisasContext *s)
 {
-    gen_exception(s, EXCP06_ILLOP, s->base.pc_next - s->cs_base);
+    gen_exception(s, EXCP06_ILLOP);
 }
 
 /* Generate #GP for the current instruction. */
 static void gen_exception_gpf(DisasContext *s)
 {
-    gen_exception(s, EXCP0D_GPF, s->base.pc_next - s->cs_base);
+    gen_exception(s, EXCP0D_GPF);
 }
 
 /* Check for cpl == 0; if not, raise #GP and return false. */
@@ -3240,7 +3240,7 @@  static void gen_sse(CPUX86State *env, DisasContext *s, int b)
     }
     /* simple MMX/SSE operation */
     if (s->flags & HF_TS_MASK) {
-        gen_exception(s, EXCP07_PREX, s->base.pc_next - s->cs_base);
+        gen_exception(s, EXCP07_PREX);
         return;
     }
     if (s->flags & HF_EM_MASK) {
@@ -6042,7 +6042,7 @@  static bool disas_insn(DisasContext *s, CPUState *cpu)
             if (s->flags & (HF_EM_MASK | HF_TS_MASK)) {
                 /* if CR0.EM or CR0.TS are set, generate an FPU exception */
                 /* XXX: what to do if illegal op ? */
-                gen_exception(s, EXCP07_PREX, s->base.pc_next - s->cs_base);
+                gen_exception(s, EXCP07_PREX);
                 break;
             }
             modrm = x86_ldub_code(env, s);
@@ -7267,7 +7267,7 @@  static bool disas_insn(DisasContext *s, CPUState *cpu)
             goto illegal_op;
         val = x86_ldub_code(env, s);
         if (val == 0) {
-            gen_exception(s, EXCP00_DIVZ, s->base.pc_next - s->cs_base);
+            gen_exception(s, EXCP00_DIVZ);
         } else {
             gen_helper_aam(cpu_env, tcg_const_i32(val));
             set_cc_op(s, CC_OP_LOGICB);
@@ -7301,7 +7301,7 @@  static bool disas_insn(DisasContext *s, CPUState *cpu)
     case 0x9b: /* fwait */
         if ((s->flags & (HF_MP_MASK | HF_TS_MASK)) ==
             (HF_MP_MASK | HF_TS_MASK)) {
-            gen_exception(s, EXCP07_PREX, s->base.pc_next - s->cs_base);
+            gen_exception(s, EXCP07_PREX);
         } else {
             gen_helper_fwait(cpu_env);
         }
@@ -8358,7 +8358,7 @@  static bool disas_insn(DisasContext *s, CPUState *cpu)
                 goto illegal_op;
             }
             if ((s->flags & HF_EM_MASK) || (s->flags & HF_TS_MASK)) {
-                gen_exception(s, EXCP07_PREX, s->base.pc_next - s->cs_base);
+                gen_exception(s, EXCP07_PREX);
                 break;
             }
             gen_lea_modrm(env, s, modrm);
@@ -8371,7 +8371,7 @@  static bool disas_insn(DisasContext *s, CPUState *cpu)
                 goto illegal_op;
             }
             if ((s->flags & HF_EM_MASK) || (s->flags & HF_TS_MASK)) {
-                gen_exception(s, EXCP07_PREX, s->base.pc_next - s->cs_base);
+                gen_exception(s, EXCP07_PREX);
                 break;
             }
             gen_lea_modrm(env, s, modrm);
@@ -8383,7 +8383,7 @@  static bool disas_insn(DisasContext *s, CPUState *cpu)
                 goto illegal_op;
             }
             if (s->flags & HF_TS_MASK) {
-                gen_exception(s, EXCP07_PREX, s->base.pc_next - s->cs_base);
+                gen_exception(s, EXCP07_PREX);
                 break;
             }
             gen_lea_modrm(env, s, modrm);
@@ -8396,7 +8396,7 @@  static bool disas_insn(DisasContext *s, CPUState *cpu)
                 goto illegal_op;
             }
             if (s->flags & HF_TS_MASK) {
-                gen_exception(s, EXCP07_PREX, s->base.pc_next - s->cs_base);
+                gen_exception(s, EXCP07_PREX);
                 break;
             }
             gen_helper_update_mxcsr(cpu_env);
@@ -8787,7 +8787,7 @@  static void i386_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
      * Detect entry into the vsyscall page and invoke the syscall.
      */
     if ((dc->base.pc_next & TARGET_PAGE_MASK) == TARGET_VSYSCALL_PAGE) {
-        gen_exception(dc, EXCP_VSYSCALL, dc->base.pc_next);
+        gen_exception(dc, EXCP_VSYSCALL);
         dc->base.pc_next = dc->pc + 1;
         return;
     }