From: Xi Ruoyao <xry111@xry111.site>
Date: Tue, 19 Aug 2025 07:33:44 +0000 (+0800)
Subject: gdb: LoongArch: Handle newly added llsc instructions
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;ds=inline;p=thirdparty%2Fbinutils-gdb.git

gdb: LoongArch: Handle newly added llsc instructions

We can't put a breakpoint in the middle of a ll/sc atomic sequence,
handle the instructions sc.q, llacq.{w/d}, screl.{w/d} newly added
in the LoongArch Reference Manual v1.10 so a ll/sc atomic sequence
using them won't loop forever being debugged.

Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---

diff --git a/gdb/loongarch-tdep.c b/gdb/loongarch-tdep.c
index 3bf47d2c6d2..e497848bfce 100644
--- a/gdb/loongarch-tdep.c
+++ b/gdb/loongarch-tdep.c
@@ -98,7 +98,9 @@ static bool
 loongarch_insn_is_ll (insn_t insn)
 {
   if ((insn & 0xff000000) == 0x20000000		/* ll.w  */
-      || (insn & 0xff000000) == 0x22000000)	/* ll.d  */
+      || (insn & 0xff000000) == 0x22000000	/* ll.d  */
+      || (insn & 0xfffffc00) == 0x38578000	/* llacq.w  */
+      || (insn & 0xfffffc00) == 0x38578800)	/* llacq.d  */
     return true;
   return false;
 }
@@ -109,7 +111,10 @@ static bool
 loongarch_insn_is_sc (insn_t insn)
 {
   if ((insn & 0xff000000) == 0x21000000		/* sc.w  */
-      || (insn & 0xff000000) == 0x23000000)	/* sc.d  */
+      || (insn & 0xff000000) == 0x23000000	/* sc.d  */
+      || (insn & 0xffff8000) == 0x38570000	/* sc.q  */
+      || (insn & 0xfffffc00) == 0x38578400	/* screl.w  */
+      || (insn & 0xfffffc00) == 0x38578c00)	/* screl.d  */
     return true;
   return false;
 }