[gem5-dev] Change in gem5/gem5[develop]: arch-arm: gdb support Thumb ISA

[Yu-hsin Wang (Gerrit) via gem5-dev]

Yu-hsin Wang has uploaded this change for review. (  
https://gem5-review.googlesource.com/c/public/gem5/+/52624 )

Change subject: arch-arm: gdb support Thumb ISA
......................................................................

arch-arm: gdb support Thumb ISA

BaseRemoteGDB only checks if the breakpoint size equals to MachInst size.
However, there are two kinds of instruction size in ARM. We should allow
the 16-bits breakpoint for Thumb ISA.

Change-Id: I79c0e1503092ecf233c719f2e354739edb8e6b25
---
M src/arch/arm/remote_gdb.cc
M src/arch/arm/remote_gdb.hh
2 files changed, 21 insertions(+), 0 deletions(-)



diff --git a/src/arch/arm/remote_gdb.cc b/src/arch/arm/remote_gdb.cc
index d14e1c1..5382d51 100644
--- a/src/arch/arm/remote_gdb.cc
+++ b/src/arch/arm/remote_gdb.cc
@@ -361,4 +361,11 @@
         return &regCache32;
 }

+bool
+RemoteGDB::checkBpLen(size_t len)
+{
+    // 2 for Thumb ISA, 4 for ARM ISA.
+    return len == 2 || len == 4;
+}
+
 } // namespace gem5
diff --git a/src/arch/arm/remote_gdb.hh b/src/arch/arm/remote_gdb.hh
index 847dee7..b8f224a 100644
--- a/src/arch/arm/remote_gdb.hh
+++ b/src/arch/arm/remote_gdb.hh
@@ -120,6 +120,7 @@
   public:
     RemoteGDB(System *_system, int _port);
     BaseGdbRegCache *gdbRegs();
+    bool checkBpLen(size_t len) override;
     std::vector<std::string>
     availableFeatures() const
     {

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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I79c0e1503092ecf233c719f2e354739edb8e6b25
Gerrit-Change-Number: 52624
Gerrit-PatchSet: 1
Gerrit-Owner: Yu-hsin Wang <yuhsi...@google.com>
Gerrit-MessageType: newchange
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