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[PATCH v3 01/90] target/sparc: Clear may_lookup for npc == DYNAMIC_PC
From: |
Richard Henderson |
Subject: |
[PATCH v3 01/90] target/sparc: Clear may_lookup for npc == DYNAMIC_PC |
Date: |
Fri, 20 Oct 2023 22:30:29 -0700 |
With pairs of jmp+rett, pc == DYNAMIC_PC_LOOKUP and
npc == DYNAMIC_PC. Make sure that we exit for interrupts.
Cc: qemu-stable@nongnu.org
Fixes: 633c42834c7 ("target/sparc: Introduce DYNAMIC_PC_LOOKUP")
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/sparc/translate.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index f92ff80ac8..8fabed28fd 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -5654,10 +5654,10 @@ static void sparc_tr_tb_stop(DisasContextBase *dcbase,
CPUState *cs)
break;
}
+ may_lookup = true;
if (dc->pc & 3) {
switch (dc->pc) {
case DYNAMIC_PC_LOOKUP:
- may_lookup = true;
break;
case DYNAMIC_PC:
may_lookup = false;
@@ -5667,10 +5667,24 @@ static void sparc_tr_tb_stop(DisasContextBase *dcbase,
CPUState *cs)
}
} else {
tcg_gen_movi_tl(cpu_pc, dc->pc);
- may_lookup = true;
}
- save_npc(dc);
+ if (dc->npc & 3) {
+ switch (dc->npc) {
+ case JUMP_PC:
+ gen_generic_branch(dc);
+ break;
+ case DYNAMIC_PC:
+ may_lookup = false;
+ break;
+ case DYNAMIC_PC_LOOKUP:
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ } else {
+ tcg_gen_movi_tl(cpu_npc, dc->npc);
+ }
if (may_lookup) {
tcg_gen_lookup_and_goto_ptr();
} else {
--
2.34.1
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