[ELF] Move PhdrEntry to SyntheticSections

The next change will change Partition::phdrs to a unique_ptr vector,
which requires PhdrEntry to be a complete type.

And make OutputSection::getLMA out-of-line, since it should not include
either SyntheticSections.h or Writer.h.

Author: MaskRay

lld/ELF/OutputSections.cpp

@@ -72,6 +72,10 @@ OutputSection::OutputSection(Ctx &ctx, StringRef name, uint32_t type,
                   /*info=*/0, /*link=*/0),
       ctx(ctx) {}
 
+uint64_t OutputSection::getLMA() const {
+  return ptLoad ? addr + ptLoad->lmaOffset : addr;
+}
+
 // We allow sections of types listed below to merged into a
 // single progbits section. This is typically done by linker
 // scripts. Merging nobits and progbits will force disk space

lld/ELF/OutputSections.h

@@ -41,7 +41,7 @@ class OutputSection final : public SectionBase {
     return s->kind() == SectionBase::Output;
   }
 
-  uint64_t getLMA() const { return ptLoad ? addr + ptLoad->lmaOffset : addr; }
+  uint64_t getLMA() const;
   template <typename ELFT> void writeHeaderTo(typename ELFT::Shdr *sHdr);
 
   Ctx &ctx;

lld/ELF/SyntheticSections.h

@@ -1439,6 +1439,31 @@ Defined *addSyntheticLocal(Ctx &ctx, StringRef name, uint8_t type,
 
 void addVerneed(Ctx &, Symbol &ss);
 
+// This describes a program header entry.
+// Each contains type, access flags and range of output sections that will be
+// placed in it.
+struct PhdrEntry {
+  PhdrEntry(Ctx &ctx, unsigned type, unsigned flags)
+      : p_align(type == llvm::ELF::PT_LOAD ? ctx.arg.maxPageSize : 0),
+        p_type(type), p_flags(flags) {}
+  void add(OutputSection *sec);
+
+  uint64_t p_paddr = 0;
+  uint64_t p_vaddr = 0;
+  uint64_t p_memsz = 0;
+  uint64_t p_filesz = 0;
+  uint64_t p_offset = 0;
+  uint32_t p_align = 0;
+  uint32_t p_type = 0;
+  uint32_t p_flags = 0;
+
+  OutputSection *firstSec = nullptr;
+  OutputSection *lastSec = nullptr;
+  bool hasLMA = false;
+
+  uint64_t lmaOffset = 0;
+};
+
 // Linker generated per-partition sections.
 struct Partition {
   Ctx &ctx;

lld/ELF/Writer.h

@@ -10,40 +10,12 @@
 #define LLD_ELF_WRITER_H
 
 #include "Config.h"
-#include "llvm/ADT/StringRef.h"
-#include <cstdint>
 
 namespace lld::elf {
-class InputFile;
 class OutputSection;
 void copySectionsIntoPartitions(Ctx &ctx);
 template <class ELFT> void writeResult(Ctx &ctx);
 
-// This describes a program header entry.
-// Each contains type, access flags and range of output sections that will be
-// placed in it.
-struct PhdrEntry {
-  PhdrEntry(Ctx &ctx, unsigned type, unsigned flags)
-      : p_align(type == llvm::ELF::PT_LOAD ? ctx.arg.maxPageSize : 0),
-        p_type(type), p_flags(flags) {}
-  void add(OutputSection *sec);
-
-  uint64_t p_paddr = 0;
-  uint64_t p_vaddr = 0;
-  uint64_t p_memsz = 0;
-  uint64_t p_filesz = 0;
-  uint64_t p_offset = 0;
-  uint32_t p_align = 0;
-  uint32_t p_type = 0;
-  uint32_t p_flags = 0;
-
-  OutputSection *firstSec = nullptr;
-  OutputSection *lastSec = nullptr;
-  bool hasLMA = false;
-
-  uint64_t lmaOffset = 0;
-};
-
 void addReservedSymbols(Ctx &ctx);
 bool includeInSymtab(Ctx &, const Symbol &);
 unsigned getSectionRank(Ctx &, OutputSection &osec);