From 873e5f5094b404c7ac62830341eca4eacf8b4afa Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@swtch.com>
Date: Fri, 24 Sep 2010 12:25:25 -0400
Subject: libmach: more mach-o support

R=rsc
http://codereview.appspot.com/2277041
---
 src/libmach/macho.h | 126 +++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 104 insertions(+), 22 deletions(-)

(limited to 'src/libmach/macho.h')

diff --git a/src/libmach/macho.h b/src/libmach/macho.h
index d2a1a2e8..2b449f04 100644
--- a/src/libmach/macho.h
+++ b/src/libmach/macho.h
@@ -1,11 +1,18 @@
 typedef struct Macho Macho;
 typedef struct MachoCmd MachoCmd;
+typedef struct MachoSeg MachoSeg;
+typedef struct MachoSect MachoSect;
+typedef struct MachoRel MachoRel;
+typedef struct MachoSymtab MachoSymtab;
+typedef struct MachoSym MachoSym;
+typedef struct MachoDysymtab MachoDysymtab;
 
 enum
 {
 	MachoCpuVax = 1,
 	MachoCpu68000 = 6,
 	MachoCpu386 = 7,
+	MachoCpuAmd64 = 0x1000007,
 	MachoCpuMips = 8,
 	MachoCpu98000 = 10,
 	MachoCpuHppa = 11,
@@ -20,6 +27,8 @@ enum
 	MachoCmdSymtab = 2,
 	MachoCmdSymseg = 3,
 	MachoCmdThread = 4,
+	MachoCmdDysymtab = 11,
+	MachoCmdSegment64 = 25,
 
 	MachoFileObject = 1,
 	MachoFileExecutable = 2,
@@ -28,40 +37,111 @@ enum
 	MachoFilePreload = 5
 };
 
+struct MachoSeg
+{
+	char name[16+1];
+	uint64 vmaddr;
+	uint64 vmsize;
+	uint32 fileoff;
+	uint32 filesz;
+	uint32 maxprot;
+	uint32 initprot;
+	uint32 nsect;
+	uint32 flags;
+	MachoSect *sect;
+};
+
+struct MachoSect
+{
+	char	name[16+1];
+	char	segname[16+1];
+	uint64 addr;
+	uint64 size;
+	uint32 offset;
+	uint32 align;
+	uint32 reloff;
+	uint32 nreloc;
+	uint32 flags;
+	
+	MachoRel *rel;
+};
+
+struct MachoRel
+{
+	uint32 addr;
+	uint32 symnum;
+	uint8 pcrel;
+	uint8 length;
+	uint8 extrn;
+	uint8 type;
+};
+
+struct MachoSymtab
+{
+	uint32 symoff;
+	uint32 nsym;
+	uint32 stroff;
+	uint32 strsize;
+	
+	char *str;
+	MachoSym *sym;
+};
+
+struct MachoSym
+{
+	char *name;
+	uint8 type;
+	uint8 sectnum;
+	uint16 desc;
+	char kind;
+	uint64 value;
+};
+
+struct MachoDysymtab
+{
+	uint32 ilocalsym;
+	uint32 nlocalsym;
+	uint32 iextdefsym;
+	uint32 nextdefsym;
+	uint32 iundefsym;
+	uint32 nundefsym;
+	uint32 tocoff;
+	uint32 ntoc;
+	uint32 modtaboff;
+	uint32 nmodtab;
+	uint32 extrefsymoff;
+	uint32 nextrefsyms;
+	uint32 indirectsymoff;
+	uint32 nindirectsyms;
+	uint32 extreloff;
+	uint32 nextrel;
+	uint32 locreloff;
+	uint32 nlocrel;
+};
+
 struct MachoCmd
 {
 	int type;
-	ulong off;
-	ulong size;
-	struct {
-		char name[16+1];
-		ulong vmaddr;
-		ulong vmsize;
-		ulong fileoff;
-		ulong filesz;
-		ulong maxprot;
-		ulong initprot;
-		ulong nsect;
-		ulong flags;
-	} seg;
-	struct {
-		ulong symoff;
-		ulong nsyms;
-		ulong stroff;
-		ulong strsize;
-	} sym;
+	uint32 off;
+	uint32 size;
+	MachoSeg seg;
+	MachoSymtab sym;
+	MachoDysymtab dsym;
 };
 
 struct Macho
 {
 	int fd;
+	int is64;
 	uint cputype;
 	uint subcputype;
-	ulong filetype;
-	ulong flags;
+	uint32 filetype;
+	uint32 flags;
 	MachoCmd *cmd;
 	uint ncmd;
-	u32int (*e4)(uchar*);
+	uint16 (*e2)(uchar*);
+	uint32 (*e4)(uchar*);
+	uint64 (*e8)(uchar*);
 	int (*coreregs)(Macho*, uchar**);
 };
 
@@ -69,3 +149,5 @@ Macho *machoopen(char*);
 Macho *machoinit(int);
 void machoclose(Macho*);
 int coreregsmachopower(Macho*, uchar**);
+int macholoadrel(Macho*, MachoSect*);
+int macholoadsym(Macho*, MachoSymtab*);
-- 
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