323 lines
8.7 KiB
C
323 lines
8.7 KiB
C
/*
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* Architecture-dependent application data
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*/
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#include "a.out.h"
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#pragma src "/sys/src/libmach"
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#pragma lib "libmach.a"
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/*
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* Supported architectures:
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* mips,
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* 68020,
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* i386,
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* amd64,
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* sparc,
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* sparc64,
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* mips2 (R4000)
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* arm
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* powerpc,
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* powerpc64
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* alpha
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* arm64
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*/
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enum
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{
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MMIPS, /* machine types */
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MSPARC,
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M68020,
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MI386,
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MI960, /* retired */
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M3210, /* retired */
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MMIPS2,
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NMIPS2,
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M29000, /* retired */
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MARM,
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MPOWER,
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MALPHA,
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NMIPS,
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MSPARC64,
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MAMD64,
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MPOWER64,
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MARM64,
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/* types of executables */
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FNONE = 0, /* unidentified */
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FMIPS, /* v.out */
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FMIPSB, /* mips bootable */
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FSPARC, /* k.out */
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FSPARCB, /* Sparc bootable */
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F68020, /* 2.out */
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F68020B, /* 68020 bootable */
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FNEXTB, /* Next bootable */
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FI386, /* 8.out */
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FI386B, /* I386 bootable */
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FI960, /* retired */
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FI960B, /* retired */
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F3210, /* retired */
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FMIPS2BE, /* 4.out */
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F29000, /* retired */
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FARM, /* 5.out */
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FARMB, /* ARM bootable */
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FPOWER, /* q.out */
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FPOWERB, /* power pc bootable */
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FMIPS2LE, /* 0.out */
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FALPHA, /* 7.out */
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FALPHAB, /* DEC Alpha bootable */
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FMIPSLE, /* 3k little endian */
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FSPARC64, /* u.out */
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FAMD64, /* 6.out */
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FAMD64B, /* 6.out bootable */
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FPOWER64, /* 9.out */
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FPOWER64B, /* 9.out bootable */
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FARM64, /* arm64 */
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FARM64B, /* arm64 bootable */
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ANONE = 0, /* dissembler types */
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AMIPS,
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AMIPSCO, /* native mips */
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ASPARC,
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ASUNSPARC, /* native sun */
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A68020,
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AI386,
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AI8086, /* oh god */
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AI960, /* retired */
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A29000, /* retired */
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AARM,
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APOWER,
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AALPHA,
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ASPARC64,
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AAMD64,
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APOWER64,
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AARM64,
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/* object file types */
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Obj68020 = 0, /* .2 */
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ObjSparc, /* .k */
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ObjMips, /* .v */
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Obj386, /* .8 */
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Obj960, /* retired */
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Obj3210, /* retired */
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ObjMips2, /* .4 */
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Obj29000, /* retired */
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ObjArm, /* .5 */
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ObjPower, /* .q */
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ObjMips2le, /* .0 */
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ObjAlpha, /* .7 */
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ObjSparc64, /* .u */
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ObjAmd64, /* .6 */
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ObjSpim, /* .0 */
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ObjPower64, /* .9 */
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ObjArm64, /* .4? */
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Maxobjtype,
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CNONE = 0, /* symbol table classes */
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CAUTO,
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CPARAM,
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CSTAB,
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CTEXT,
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CDATA,
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CANY, /* to look for any class */
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};
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typedef struct Map Map;
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typedef struct Symbol Symbol;
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typedef struct Reglist Reglist;
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typedef struct Mach Mach;
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typedef struct Machdata Machdata;
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/*
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* Structure to map a segment to a position in a file
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*/
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struct Map {
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int nsegs; /* number of segments */
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struct segment { /* per-segment map */
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char *name; /* the segment name */
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int fd; /* file descriptor */
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long (*read)(int, void *, long, vlong);
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int inuse; /* in use - not in use */
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int cache; /* should cache reads? */
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uvlong b; /* base */
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uvlong e; /* end */
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vlong f; /* offset within file */
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} seg[1]; /* actually n of these */
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};
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/*
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* Internal structure describing a symbol table entry
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*/
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struct Symbol {
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void *handle; /* used internally - owning func */
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struct {
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char *name;
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vlong value; /* address or stack offset */
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char type; /* as in a.out.h */
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char class; /* as above */
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int index; /* in findlocal, globalsym, textsym */
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};
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};
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/*
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* machine register description
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*/
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struct Reglist {
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char *rname; /* register name */
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short roffs; /* offset in u-block */
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char rflags; /* INTEGER/FLOAT, WRITABLE */
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char rformat; /* print format: 'x', 'X', 'f', '8', '3', 'Y', 'W' */
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};
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enum { /* bits in rflags field */
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RINT = (0<<0),
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RFLT = (1<<0),
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RRDONLY = (1<<1),
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};
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/*
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* Machine-dependent data is stored in two structures:
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* Mach - miscellaneous general parameters
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* Machdata - jump vector of service functions used by debuggers
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*
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* Mach is defined in ?.c and set in executable.c
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*
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* Machdata is defined in ?db.c
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* and set in the debugger startup.
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*/
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struct Mach{
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char *name;
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int mtype; /* machine type code */
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Reglist *reglist; /* register set */
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long regsize; /* sizeof registers in bytes */
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long fpregsize; /* sizeof fp registers in bytes */
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char *pc; /* pc name */
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char *sp; /* sp name */
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char *link; /* link register name */
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char *sbreg; /* static base register name */
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uvlong sb; /* static base register value */
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int pgsize; /* page size */
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uvlong kbase; /* kernel base address */
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uvlong ktmask; /* ktzero = kbase & ~ktmask */
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uvlong utop; /* user stack top */
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int pcquant; /* quantization of pc */
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int szaddr; /* sizeof(void*) */
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int szreg; /* sizeof(register) */
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int szfloat; /* sizeof(float) */
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int szdouble; /* sizeof(double) */
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};
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extern Mach *mach; /* Current machine */
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typedef uvlong (*Rgetter)(Map*, char*);
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typedef void (*Tracer)(Map*, uvlong, uvlong, Symbol*);
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struct Machdata { /* Machine-dependent debugger support */
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uchar bpinst[4]; /* break point instr. */
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short bpsize; /* size of break point instr. */
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ushort (*swab)(ushort); /* ushort to local byte order */
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ulong (*swal)(ulong); /* ulong to local byte order */
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uvlong (*swav)(uvlong); /* uvlong to local byte order */
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int (*ctrace)(Map*, uvlong, uvlong, uvlong, Tracer); /* C traceback */
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uvlong (*findframe)(Map*, uvlong, uvlong, uvlong, uvlong);/* frame finder */
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char* (*excep)(Map*, Rgetter); /* last exception */
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ulong (*bpfix)(uvlong); /* breakpoint fixup */
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int (*sftos)(char*, int, void*); /* single precision float */
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int (*dftos)(char*, int, void*); /* double precision float */
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int (*foll)(Map*, uvlong, Rgetter, uvlong*);/* follow set */
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int (*das)(Map*, uvlong, char, char*, int); /* symbolic disassembly */
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int (*hexinst)(Map*, uvlong, char*, int); /* hex disassembly */
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int (*instsize)(Map*, uvlong); /* instruction size */
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};
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/*
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* Common a.out header describing all architectures
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*/
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typedef struct Fhdr
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{
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char *name; /* identifier of executable */
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uchar type; /* file type - see codes above */
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uchar hdrsz; /* header size */
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uchar _magic; /* _MAGIC() magic */
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uchar spare;
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long magic; /* magic number */
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uvlong txtaddr; /* text address */
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vlong txtoff; /* start of text in file */
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uvlong dataddr; /* start of data segment */
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vlong datoff; /* offset to data seg in file */
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vlong symoff; /* offset of symbol table in file */
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uvlong entry; /* entry point */
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vlong sppcoff; /* offset of sp-pc table in file */
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vlong lnpcoff; /* offset of line number-pc table in file */
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long txtsz; /* text size */
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long datsz; /* size of data seg */
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long bsssz; /* size of bss */
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long symsz; /* size of symbol table */
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long sppcsz; /* size of sp-pc table */
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long lnpcsz; /* size of line number-pc table */
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} Fhdr;
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extern int asstype; /* dissembler type - machdata.c */
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extern Machdata *machdata; /* jump vector - machdata.c */
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Map* attachproc(int, int, int, Fhdr*);
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int beieee80ftos(char*, int, void*);
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int beieeesftos(char*, int, void*);
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int beieeedftos(char*, int, void*);
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ushort beswab(ushort);
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ulong beswal(ulong);
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uvlong beswav(uvlong);
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uvlong ciscframe(Map*, uvlong, uvlong, uvlong, uvlong);
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int cisctrace(Map*, uvlong, uvlong, uvlong, Tracer);
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int crackhdr(int fd, Fhdr*);
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uvlong file2pc(char*, long);
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int fileelem(Sym**, uchar *, char*, int);
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long fileline(char*, int, uvlong);
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int filesym(int, char*, int);
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int findlocal(Symbol*, char*, Symbol*);
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int findseg(Map*, char*);
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int findsym(uvlong, int, Symbol *);
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int fnbound(uvlong, uvlong*);
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int fpformat(Map*, Reglist*, char*, int, int);
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int get1(Map*, uvlong, uchar*, int);
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int get2(Map*, uvlong, ushort*);
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int get4(Map*, uvlong, ulong*);
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int get8(Map*, uvlong, uvlong*);
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int geta(Map*, uvlong, uvlong*);
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int getauto(Symbol*, int, int, Symbol*);
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Sym* getsym(int);
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int globalsym(Symbol *, int);
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char* _hexify(char*, ulong, int);
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int ieeesftos(char*, int, ulong);
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int ieeedftos(char*, int, ulong, ulong);
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int isar(Biobuf*);
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int leieee80ftos(char*, int, void*);
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int leieeesftos(char*, int, void*);
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int leieeedftos(char*, int, void*);
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ushort leswab(ushort);
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ulong leswal(ulong);
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uvlong leswav(uvlong);
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uvlong line2addr(long, uvlong, uvlong);
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Map* loadmap(Map*, int, Fhdr*);
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int localaddr(Map*, char*, char*, uvlong*, Rgetter);
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int localsym(Symbol*, int);
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int lookup(char*, char*, Symbol*);
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void machbytype(int);
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int machbyname(char*);
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int nextar(Biobuf*, int, char*);
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Map* newmap(Map*, int);
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void objtraverse(void(*)(Sym*, void*), void*);
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int objtype(Biobuf*, char**);
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uvlong pc2sp(uvlong);
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long pc2line(uvlong);
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int put1(Map*, uvlong, uchar*, int);
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int put2(Map*, uvlong, ushort);
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int put4(Map*, uvlong, ulong);
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int put8(Map*, uvlong, uvlong);
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int puta(Map*, uvlong, uvlong);
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int readar(Biobuf*, int, vlong, int);
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int readobj(Biobuf*, int);
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uvlong riscframe(Map*, uvlong, uvlong, uvlong, uvlong);
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int risctrace(Map*, uvlong, uvlong, uvlong, Tracer);
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int setmap(Map*, int, uvlong, uvlong, vlong, char*);
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Sym* symbase(long*);
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int syminit(int, Fhdr*);
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int symoff(char*, int, uvlong, int);
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void textseg(uvlong, Fhdr*);
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int textsym(Symbol*, int);
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void unusemap(Map*, int);
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