Introduce x87 port

src/gdb-jit.cc

Index: src/gdb-jit.cc
diff --git a/src/gdb-jit.cc b/src/gdb-jit.cc
index f2861c15f3570eba5ea38cf08aa40f237a2a9a35..1924ab8b8392c84ca2bbca4085ac30feef8a186f 100644
--- a/src/gdb-jit.cc
+++ b/src/gdb-jit.cc
@@ -194,7 +194,7 @@ class DebugSectionBase : public ZoneObject {
 struct MachOSectionHeader {
   char sectname[16];
   char segname[16];
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87
   uint32_t addr;
   uint32_t size;
 #else
@@ -511,7 +511,7 @@ class MachO BASE_EMBEDDED {
     uint32_t cmd;
     uint32_t cmdsize;
     char segname[16];
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87
     uint32_t vmaddr;
     uint32_t vmsize;
     uint32_t fileoff;
@@ -537,7 +537,7 @@ class MachO BASE_EMBEDDED {
   Writer::Slot<MachOHeader> WriteHeader(Writer* w) {
     ASSERT(w->position() == 0);
     Writer::Slot<MachOHeader> header = w->CreateSlotHere<MachOHeader>();
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87
     header->magic = 0xFEEDFACEu;
     header->cputype = 7;  // i386
     header->cpusubtype = 3;  // CPU_SUBTYPE_I386_ALL
@@ -562,7 +562,7 @@ class MachO BASE_EMBEDDED {
                                                         uintptr_t code_size) {
     Writer::Slot<MachOSegmentCommand> cmd =
         w->CreateSlotHere<MachOSegmentCommand>();
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87
     cmd->cmd = LC_SEGMENT_32;
 #else
     cmd->cmd = LC_SEGMENT_64;
@@ -649,7 +649,7 @@ class ELF BASE_EMBEDDED {
   void WriteHeader(Writer* w) {
     ASSERT(w->position() == 0);
     Writer::Slot<ELFHeader> header = w->CreateSlotHere<ELFHeader>();
-#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_ARM
+#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_X87
     const uint8_t ident[16] =
         { 0x7f, 'E', 'L', 'F', 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 #elif V8_TARGET_ARCH_X64
@@ -660,7 +660,7 @@ class ELF BASE_EMBEDDED {
 #endif
     OS::MemCopy(header->ident, ident, 16);
     header->type = 1;
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87
     header->machine = 3;
 #elif V8_TARGET_ARCH_X64
     // Processor identification value for x64 is 62 as defined in
@@ -762,7 +762,7 @@ class ELFSymbol BASE_EMBEDDED {
   Binding binding() const {
     return static_cast<Binding>(info >> 4);
   }
-#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_ARM
+#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_X87
   struct SerializedLayout {
     SerializedLayout(uint32_t name,
                      uintptr_t value,
@@ -1084,7 +1084,7 @@ class DebugInfoSection : public DebugSection {
       w->Write<intptr_t>(desc_->CodeStart() + desc_->CodeSize());
       Writer::Slot<uint32_t> fb_block_size = w->CreateSlotHere<uint32_t>();
       uintptr_t fb_block_start = w->position();
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87
       w->Write<uint8_t>(DW_OP_reg5);  // The frame pointer's here on ia32
 #elif V8_TARGET_ARCH_X64
       w->Write<uint8_t>(DW_OP_reg6);  // and here on x64.