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/*
* Architecture-dependent application data
*/
#include "a.out.h"
#pragma src "/sys/src/libmach"
#pragma lib "libmach.a"
/*
* Supported architectures:
* mips,
* 68020,
* i386,
* amd64,
* sparc,
* mips2 (R4000)
* arm
* powerpc,
* powerpc64
* arm64
*/
enum
{
MMIPS, /* machine types */
MSPARC,
M68020,
MI386,
MI960, /* retired */
M3210, /* retired */
MMIPS2,
NMIPS2,
M29000, /* retired */
MARM,
MPOWER,
MALPHA, /* retired */
NMIPS,
MSPARC64, /* retired */
MAMD64,
MPOWER64,
MARM64,
/* types of executables */
FNONE = 0, /* unidentified */
FMIPS, /* v.out */
FMIPSB, /* mips bootable */
FSPARC, /* k.out */
FSPARCB, /* Sparc bootable */
F68020, /* 2.out */
F68020B, /* 68020 bootable */
FNEXTB, /* Next bootable */
FI386, /* 8.out */
FI386B, /* I386 bootable */
FI960, /* retired */
FI960B, /* retired */
F3210, /* retired */
FMIPS2BE, /* 4.out */
F29000, /* retired */
FARM, /* 5.out */
FARMB, /* ARM bootable */
FPOWER, /* q.out */
FPOWERB, /* power pc bootable */
FMIPS2LE, /* 0.out */
FALPHA, /* retired */
FALPHAB, /* retired DEC Alpha bootable */
FMIPSLE, /* 3k little endian */
FSPARC64, /* retired */
FAMD64, /* 6.out */
FAMD64B, /* 6.out bootable */
FPOWER64, /* 9.out */
FPOWER64B, /* 9.out bootable */
FARM64, /* arm64 */
FARM64B, /* arm64 bootable */
ANONE = 0, /* dissembler types */
AMIPS,
AMIPSCO, /* native mips */
ASPARC,
ASUNSPARC, /* native sun */
A68020,
AI386,
AI8086, /* oh god */
AI960, /* retired */
A29000, /* retired */
AARM,
APOWER,
AALPHA, /* retired */
ASPARC64, /* retired */
AAMD64,
APOWER64,
AARM64,
/* object file types */
Obj68020 = 0, /* .2 */
ObjSparc, /* .k */
ObjMips, /* .v */
Obj386, /* .8 */
Obj960, /* retired */
Obj3210, /* retired */
ObjMips2, /* .4 */
Obj29000, /* retired */
ObjArm, /* .5 */
ObjPower, /* .q */
ObjMips2le, /* .0 */
ObjAlpha, /* retired */
ObjSparc64, /* retired */
ObjAmd64, /* .6 */
ObjSpim, /* .0 */
ObjPower64, /* .9 */
ObjArm64, /* .4? */
Maxobjtype,
CNONE = 0, /* symbol table classes */
CAUTO,
CPARAM,
CSTAB,
CTEXT,
CDATA,
CANY, /* to look for any class */
};
typedef struct Map Map;
typedef struct Symbol Symbol;
typedef struct Reglist Reglist;
typedef struct Mach Mach;
typedef struct Machdata Machdata;
/*
* Structure to map a segment to a position in a file
*/
struct Map {
int nsegs; /* number of segments */
struct segment { /* per-segment map */
char *name; /* the segment name */
int fd; /* file descriptor */
int inuse; /* in use - not in use */
int cache; /* should cache reads? */
uvlong b; /* base */
uvlong e; /* end */
vlong f; /* offset within file */
} seg[1]; /* actually n of these */
};
/*
* Internal structure describing a symbol table entry
*/
struct Symbol {
void *handle; /* used internally - owning func */
struct {
char *name;
vlong value; /* address or stack offset */
char type; /* as in a.out.h */
char class; /* as above */
int index; /* in findlocal, globalsym, textsym */
};
};
/*
* machine register description
*/
struct Reglist {
char *rname; /* register name */
short roffs; /* offset in u-block */
char rflags; /* INTEGER/FLOAT, WRITABLE */
char rformat; /* print format: 'x', 'X', 'f', '8', '3', 'Y', 'W' */
};
enum { /* bits in rflags field */
RINT = (0<<0),
RFLT = (1<<0),
RRDONLY = (1<<1),
};
/*
* Machine-dependent data is stored in two structures:
* Mach - miscellaneous general parameters
* Machdata - jump vector of service functions used by debuggers
*
* Mach is defined in ?.c and set in executable.c
*
* Machdata is defined in ?db.c
* and set in the debugger startup.
*/
struct Mach{
char *name;
int mtype; /* machine type code */
Reglist *reglist; /* register set */
long regsize; /* sizeof registers in bytes */
long fpregsize; /* sizeof fp registers in bytes */
char *pc; /* pc name */
char *sp; /* sp name */
char *link; /* link register name */
char *sbreg; /* static base register name */
uvlong sb; /* static base register value */
int pgsize; /* page size */
uvlong kbase; /* kernel base address */
uvlong ktmask; /* ktzero = kbase & ~ktmask */
uvlong utop; /* user stack top */
int pcquant; /* quantization of pc */
int szaddr; /* sizeof(void*) */
int szreg; /* sizeof(register) */
int szfloat; /* sizeof(float) */
int szdouble; /* sizeof(double) */
};
extern Mach *mach; /* Current machine */
typedef uvlong (*Rgetter)(Map*, char*);
typedef void (*Tracer)(Map*, uvlong, uvlong, Symbol*);
struct Machdata { /* Machine-dependent debugger support */
uchar bpinst[4]; /* break point instr. */
short bpsize; /* size of break point instr. */
ushort (*swab)(ushort); /* ushort to local byte order */
ulong (*swal)(ulong); /* ulong to local byte order */
uvlong (*swav)(uvlong); /* uvlong to local byte order */
int (*ctrace)(Map*, uvlong, uvlong, uvlong, Tracer); /* C traceback */
uvlong (*findframe)(Map*, uvlong, uvlong, uvlong, uvlong);/* frame finder */
char* (*excep)(Map*, Rgetter); /* last exception */
ulong (*bpfix)(uvlong); /* breakpoint fixup */
int (*sftos)(char*, int, void*); /* single precision float */
int (*dftos)(char*, int, void*); /* double precision float */
int (*foll)(Map*, uvlong, Rgetter, uvlong*);/* follow set */
int (*das)(Map*, uvlong, char, char*, int); /* symbolic disassembly */
int (*hexinst)(Map*, uvlong, char*, int); /* hex disassembly */
int (*instsize)(Map*, uvlong); /* instruction size */
};
/*
* Common a.out header describing all architectures
*/
typedef struct Fhdr
{
char *name; /* identifier of executable */
uchar type; /* file type - see codes above */
uchar hdrsz; /* header size */
uchar _magic; /* _MAGIC() magic */
uchar spare;
long magic; /* magic number */
uvlong txtaddr; /* text address */
vlong txtoff; /* start of text in file */
uvlong dataddr; /* start of data segment */
vlong datoff; /* offset to data seg in file */
vlong symoff; /* offset of symbol table in file */
uvlong entry; /* entry point */
vlong sppcoff; /* offset of sp-pc table in file */
vlong lnpcoff; /* offset of line number-pc table in file */
long txtsz; /* text size */
long datsz; /* size of data seg */
long bsssz; /* size of bss */
long symsz; /* size of symbol table */
long sppcsz; /* size of sp-pc table */
long lnpcsz; /* size of line number-pc table */
} Fhdr;
extern int asstype; /* dissembler type - machdata.c */
extern Machdata *machdata; /* jump vector - machdata.c */
Map* attachproc(int, int, int, Fhdr*);
int beieee80ftos(char*, int, void*);
int beieeesftos(char*, int, void*);
int beieeedftos(char*, int, void*);
ushort beswab(ushort);
ulong beswal(ulong);
uvlong beswav(uvlong);
uvlong ciscframe(Map*, uvlong, uvlong, uvlong, uvlong);
int cisctrace(Map*, uvlong, uvlong, uvlong, Tracer);
int crackhdr(int fd, Fhdr*);
uvlong file2pc(char*, long);
int fileelem(Sym**, uchar *, char*, int);
long fileline(char*, int, uvlong);
int filesym(int, char*, int);
int findlocal(Symbol*, char*, Symbol*);
int findseg(Map*, char*);
int findsym(uvlong, int, Symbol *);
int fnbound(uvlong, uvlong*);
int fpformat(Map*, Reglist*, char*, int, int);
int get1(Map*, uvlong, uchar*, int);
int get2(Map*, uvlong, ushort*);
int get4(Map*, uvlong, ulong*);
int get8(Map*, uvlong, uvlong*);
int geta(Map*, uvlong, uvlong*);
int getauto(Symbol*, int, int, Symbol*);
Sym* getsym(int);
int globalsym(Symbol *, int);
char* _hexify(char*, ulong, int);
int ieeesftos(char*, int, ulong);
int ieeedftos(char*, int, ulong, ulong);
int isar(Biobuf*);
int leieee80ftos(char*, int, void*);
int leieeesftos(char*, int, void*);
int leieeedftos(char*, int, void*);
ushort leswab(ushort);
ulong leswal(ulong);
uvlong leswav(uvlong);
uvlong line2addr(long, uvlong, uvlong);
Map* loadmap(Map*, int, Fhdr*);
int localaddr(Map*, char*, char*, uvlong*, Rgetter);
int localsym(Symbol*, int);
int lookup(char*, char*, Symbol*);
void machbytype(int);
int machbyname(char*);
int nextar(Biobuf*, int, char*);
Map* newmap(Map*, int);
void objtraverse(void(*)(Sym*, void*), void*);
int objtype(Biobuf*, char**);
uvlong pc2sp(uvlong);
long pc2line(uvlong);
int put1(Map*, uvlong, uchar*, int);
int put2(Map*, uvlong, ushort);
int put4(Map*, uvlong, ulong);
int put8(Map*, uvlong, uvlong);
int puta(Map*, uvlong, uvlong);
int readar(Biobuf*, int, vlong, int);
int readobj(Biobuf*, int);
uvlong riscframe(Map*, uvlong, uvlong, uvlong, uvlong);
int risctrace(Map*, uvlong, uvlong, uvlong, Tracer);
int setmap(Map*, int, uvlong, uvlong, vlong, char*);
Sym* symbase(long*);
int syminit(int, Fhdr*);
int symoff(char*, int, uvlong, int);
void textseg(uvlong, Fhdr*);
int textsym(Symbol*, int);
void unusemap(Map*, int);