1 files changed, 47 insertions, 0 deletions
diff --git a/rts/linker/JitObjectCoff.c b/rts/linker/JitObjectCoff.c
new file mode 100644
index 0000000000..77ce9fecc9
--- /dev/null
+++ b/rts/linker/JitObjectCoff.c
@@ -0,0 +1,47 @@
+#include "BufferBuilder.h"
+#include "JitObject.h"
+#include "LinkerInternals.h"
+#include "RtsUtils.h"
+
+struct BufferBuilder build_jit_object(ObjectCode *oc)
+{
+    struct BufferBuilder bb = buffer_builder_new(4096);
+
+    // COFF header
+    buffer_builder_uint16(&bb, IMAGE_FILE_MACHINE_AMD64);
+    buffer_builder_uint16(&bb, 1); // NumberOfSections
+    buffer_builder_uint32(&bb, 0); // TimeDateStamp
+    uint32_t *ptr_to_symbol_table = buffer_builder_uint32(&bb, 0); // PointerToSymbolTable
+    buffer_builder_uint32(&bb, n_syms); // NumberOfSymbols
+    buffer_builder_uint16(&bb, 0); // SizeOfOptionalHeader
+    buffer_builder_uint16(&bb, 0); // Characteristics
+
+    // Sections
+    buffer_builder_push(&bb, ".text\0\0\0", 8); // Name
+    buffer_builder_uint32(&bb, sect_sz);        // VirtualSize
+    buffer_builder_uint32(&bb, sect_base);      // VirtualAddress
+    buffer_builder_uint32(&bb, 0);              // SizeOfRawData
+    buffer_builder_uint32(&bb, 0);              // PointerToRawData
+    buffer_builder_uint32(&bb, 0);              // PointerToRelocations
+    buffer_builder_uint32(&bb, 0);              // PointerToLinenumbers
+    buffer_builder_uint16(&bb, 0);              // NumberOfRelocations
+    buffer_builder_uint16(&bb, 0);              // NumberOfLinenumbers
+    buffer_builder_uint32(&bb, 0);              // Characteristics
+
+    struct BufferBuilder strings = buffer_builder_new(4096);
+    for (int i=0; i < oc->n_symbols; i++) {
+        Symbol_t *sym = &oc->symbols[i];
+        size_t offset = buffer_builder_filled_size(&strings);
+        buffer_builder_push(&strings, sym->name, strlen(sym->name));
+        buffer_builder_uint32(&bb, 0);
+        buffer_builder_uint32(&bb, offset); // RawName index
+        buffer_builder_uint32(&bb, value);  // Value
+        buffer_builder_uint16(&bb, 1);      // SectionNumber
+        buffer_builder_uint8(&bb, 0x20);    // StorageClass
+        buffer_builder_uint8(&bb, 0);       // NumberOfAuxSymbols
+    }
+
+    buffer_builder_append(&bb, strings);
+    return bb;
+}
+