[lldb][aix] 2. Updating XCOFF,PPC entry in LLDB ArchSpec

[DhruvSrivastavaX]

This PR is in reference to porting LLDB on AIX.

Link to discussions on llvm discourse and github:

1. https://discourse.llvm.org/t/port-lldb-to-ibm-aix/80640
2. Extending LLDB to work on AIX #101657

The complete changes for porting are present in this draft PR:
#102601

The changes in this PR are intended to update the Architecture entry for LLDB with XCOFF,PPC.

1. Added a new ArchDefinitionEntry g_xcoff_arch_entries[]
2. Added a new case for XCOFF in ArchSpec::SetArchitecture(..)
3. Updated ArchDefinition *g_arch_definitions[]

[llvmbot]

@llvm/pr-subscribers-lldb

Author: Dhruv Srivastava (DhruvSrivastavaX)

Changes

This PR is in reference to porting LLDB on AIX.

Link to discussions on llvm discourse and github:

1. https://discourse.llvm.org/t/port-lldb-to-ibm-aix/80640
2. #101657

The complete changes for porting are present in this draft PR:
#102601

The changes in this PR are intended to update the Architecture entry for LLDB with XCOFF,PPC.

1. Added a new ArchDefinitionEntry g_xcoff_arch_entries[]
2. Added a new case for XCOFF in ArchSpec::SetArchitecture(..)
3. Updated ArchDefinition *g_arch_definitions[]

---

Full diff: https://github.com/llvm/llvm-project/pull/105507.diff

1 Files Affected:

• (modified) lldb/source/Utility/ArchSpec.cpp (+18-1)

diff --git a/lldb/source/Utility/ArchSpec.cpp b/lldb/source/Utility/ArchSpec.cpp
index 07ef435ef451d2..4fd1a800023ce3 100644
--- a/lldb/source/Utility/ArchSpec.cpp
+++ b/lldb/source/Utility/ArchSpec.cpp
@@ -16,6 +16,7 @@
 #include "llvm/BinaryFormat/COFF.h"
 #include "llvm/BinaryFormat/ELF.h"
 #include "llvm/BinaryFormat/MachO.h"
+#include "llvm/BinaryFormat/XCOFF.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/TargetParser/ARMTargetParser.h"
 
@@ -459,10 +460,23 @@ static const ArchDefinition g_coff_arch_def = {
     "pe-coff",
 };
 
+static const ArchDefinitionEntry g_xcoff_arch_entries[] = {
+    {ArchSpec::eCore_ppc_generic, llvm::XCOFF::TCPU_COM, LLDB_INVALID_CPUTYPE,
+     0xFFFFFFFFu, 0xFFFFFFFFu},
+    {ArchSpec::eCore_ppc64_generic, llvm::XCOFF::TCPU_PPC64,
+     LLDB_INVALID_CPUTYPE, 0xFFFFFFFFu, 0xFFFFFFFFu}};
+
+static const ArchDefinition g_xcoff_arch_def = {
+    eArchTypeXCOFF,
+    std::size(g_xcoff_arch_entries),
+    g_xcoff_arch_entries,
+    "xcoff",
+};
+
 //===----------------------------------------------------------------------===//
 // Table of all ArchDefinitions
 static const ArchDefinition *g_arch_definitions[] = {
-    &g_macho_arch_def, &g_elf_arch_def, &g_coff_arch_def};
+    &g_macho_arch_def, &g_elf_arch_def, &g_coff_arch_def, &g_xcoff_arch_def};
 
 //===----------------------------------------------------------------------===//
 // Static helper functions.
@@ -903,6 +917,9 @@ bool ArchSpec::SetArchitecture(ArchitectureType arch_type, uint32_t cpu,
         } else if (arch_type == eArchTypeCOFF && os == llvm::Triple::Win32) {
           m_triple.setVendor(llvm::Triple::PC);
           m_triple.setOS(llvm::Triple::Win32);
+        } else if (arch_type == eArchTypeXCOFF && os == llvm::Triple::AIX) {
+          m_triple.setVendor(llvm::Triple::IBM);
+          m_triple.setOS(llvm::Triple::AIX);
         } else {
           m_triple.setVendor(llvm::Triple::UnknownVendor);
           m_triple.setOS(llvm::Triple::UnknownOS);