From e26c79a878ed1c0ee25cf7dffbb023dca7a871b9 Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Sat, 2 Sep 2023 22:45:44 +0200
Subject: [PATCH] git subrepo pull --force deps/lightrec

subrepo:
  subdir:   "deps/lightrec"
  merged:   "3eee0e1e7e"
upstream:
  origin:   "https://github.com/pcercuei/lightrec.git"
  branch:   "master"
  commit:   "3eee0e1e7e"
git-subrepo:
  version:  "0.4.6"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "110b9eb"
---
 deps/lightrec/.gitrepo       |  4 ++--
 deps/lightrec/disassembler.h |  2 +-
 deps/lightrec/emitter.c      | 33 +++++++++++++++++----------------
 deps/lightrec/interpreter.c  |  4 ++--
 deps/lightrec/lightrec.h     |  1 +
 5 files changed, 23 insertions(+), 21 deletions(-)

diff --git a/deps/lightrec/.gitrepo b/deps/lightrec/.gitrepo
index b2e393a3..ddebd0bf 100644
--- a/deps/lightrec/.gitrepo
+++ b/deps/lightrec/.gitrepo
@@ -6,7 +6,7 @@
 [subrepo]
 	remote = https://github.com/pcercuei/lightrec.git
 	branch = master
-	commit = afc75e49d7eb8c36697e969cb980757974630b3e
-	parent = ba86ff938a6b17c171dd68ebdf897ca3e30550f8
+	commit = 3eee0e1e7e5ada68f2da11b7951def4366caae38
+	parent = c9f33835ba76a0578cfd388353e04c6391869e0a
 	method = merge
 	cmdver = 0.4.6
diff --git a/deps/lightrec/disassembler.h b/deps/lightrec/disassembler.h
index 1804f884..e05a093c 100644
--- a/deps/lightrec/disassembler.h
+++ b/deps/lightrec/disassembler.h
@@ -111,7 +111,7 @@ enum standard_opcodes {
 	OP_LWC2			= 0x32,
 	OP_SWC2			= 0x3a,
 
-	OP_META			= 0x3b,
+	OP_META			= 0x3c,
 
 	OP_META_MULT2		= 0x19,
 	OP_META_MULTU2		= 0x1a,
diff --git a/deps/lightrec/emitter.c b/deps/lightrec/emitter.c
index b7ace194..275ed2ac 100644
--- a/deps/lightrec/emitter.c
+++ b/deps/lightrec/emitter.c
@@ -28,13 +28,6 @@ static void rec_cp2_do_mfc2(struct lightrec_cstate *state,
 			    const struct block *block, u16 offset,
 			    u8 reg, u8 out_reg);
 
-static void unknown_opcode(struct lightrec_cstate *state, const struct block *block, u16 offset)
-{
-	pr_warn("Unknown opcode: 0x%08x at PC 0x%08x\n",
-		block->opcode_list[offset].c.opcode,
-		block->pc + (offset << 2));
-}
-
 static void
 lightrec_jump_to_fn(jit_state_t *_jit, void (*fn)(void))
 {
@@ -2009,9 +2002,9 @@ static void rec_LW(struct lightrec_cstate *state, const struct block *block, u16
 	rec_load(state, block, offset, code, jit_code_bswapr_ui, false);
 }
 
-static void rec_break_syscall(struct lightrec_cstate *state,
-			      const struct block *block, u16 offset,
-			      u32 exit_code)
+static void rec_exit_early(struct lightrec_cstate *state,
+			   const struct block *block, u16 offset,
+			   u32 exit_code, u32 pc)
 {
 	struct regcache *reg_cache = state->reg_cache;
 	jit_state_t *_jit = block->_jit;
@@ -2036,24 +2029,25 @@ static void rec_break_syscall(struct lightrec_cstate *state,
 
 	lightrec_free_reg(reg_cache, tmp);
 
-	/* TODO: the return address should be "pc - 4" if we're a delay slot */
-	lightrec_emit_end_of_block(state, block, offset, -1,
-				   get_ds_pc(block, offset, 0),
-				   31, 0, true);
+	lightrec_emit_end_of_block(state, block, offset, -1, pc, 31, 0, true);
 }
 
 static void rec_special_SYSCALL(struct lightrec_cstate *state,
 				const struct block *block, u16 offset)
 {
 	_jit_name(block->_jit, __func__);
-	rec_break_syscall(state, block, offset, LIGHTREC_EXIT_SYSCALL);
+
+	/* TODO: the return address should be "pc - 4" if we're a delay slot */
+	rec_exit_early(state, block, offset, LIGHTREC_EXIT_SYSCALL,
+		       get_ds_pc(block, offset, 0));
 }
 
 static void rec_special_BREAK(struct lightrec_cstate *state,
 			      const struct block *block, u16 offset)
 {
 	_jit_name(block->_jit, __func__);
-	rec_break_syscall(state, block, offset, LIGHTREC_EXIT_BREAK);
+	rec_exit_early(state, block, offset, LIGHTREC_EXIT_BREAK,
+		       get_ds_pc(block, offset, 0));
 }
 
 static void rec_mfc(struct lightrec_cstate *state, const struct block *block, u16 offset)
@@ -2777,6 +2771,13 @@ static void rec_meta_COM(struct lightrec_cstate *state,
 	lightrec_free_reg(reg_cache, rd);
 }
 
+static void unknown_opcode(struct lightrec_cstate *state,
+			   const struct block *block, u16 offset)
+{
+	rec_exit_early(state, block, offset, LIGHTREC_EXIT_UNKNOWN_OP,
+		       block->pc + (offset << 2));
+}
+
 static const lightrec_rec_func_t rec_standard[64] = {
 	SET_DEFAULT_ELM(rec_standard, unknown_opcode),
 	[OP_SPECIAL]		= rec_SPECIAL,
diff --git a/deps/lightrec/interpreter.c b/deps/lightrec/interpreter.c
index 37264d3e..2112b553 100644
--- a/deps/lightrec/interpreter.c
+++ b/deps/lightrec/interpreter.c
@@ -318,9 +318,9 @@ static u32 int_delay_slot(struct interpreter *inter, u32 pc, bool branch)
 
 static u32 int_unimplemented(struct interpreter *inter)
 {
-	pr_warn("Unimplemented opcode 0x%08x\n", inter->op->opcode);
+	lightrec_set_exit_flags(inter->state, LIGHTREC_EXIT_UNKNOWN_OP);
 
-	return jump_next(inter);
+	return inter->block->pc + (inter->offset << 2);
 }
 
 static u32 int_jump(struct interpreter *inter, bool link)
diff --git a/deps/lightrec/lightrec.h b/deps/lightrec/lightrec.h
index 9779951b..5a66e73e 100644
--- a/deps/lightrec/lightrec.h
+++ b/deps/lightrec/lightrec.h
@@ -63,6 +63,7 @@ struct lightrec_mem_map;
 #define LIGHTREC_EXIT_SYSCALL	(1 << 2)
 #define LIGHTREC_EXIT_SEGFAULT	(1 << 3)
 #define LIGHTREC_EXIT_NOMEM	(1 << 4)
+#define LIGHTREC_EXIT_UNKNOWN_OP	(1 << 5)
 
 /* Unsafe optimizations flags */
 #define LIGHTREC_OPT_INV_DMA_ONLY	(1 << 0)
-- 
2.39.5