mirror of
https://github.com/golang/go
synced 2024-11-25 07:17:56 -07:00
linker work
* remove now-unused D_SBIG (was for typestrings) * rename elf64.[ch] to elf.[ch] * pull in elf headers from FreeBSD instead of writing our own * emit non-header ELF data in data section * stub out a few more ELF sections needed for dynamic loading R=r DELTA=1928 (1237 added, 635 deleted, 56 changed) OCL=33642 CL=33658
This commit is contained in:
parent
ef45e64afc
commit
0e25c1dc6d
@ -822,7 +822,7 @@ enum
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D_INDIR, /* additive */
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D_SBIG = D_INDIR + D_INDIR,
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D_SIZE = D_INDIR + D_INDIR, /* 6l internal */
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T_TYPE = 1<<0,
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T_INDEX = 1<<1,
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@ -10,7 +10,7 @@ TARG=\
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OFILES=\
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asm.$O\
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compat.$O\
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elf64.$O\
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elf.$O\
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enam.$O\
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go.$O\
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list.$O\
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@ -22,7 +22,7 @@ OFILES=\
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HFILES=\
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l.h\
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../6l/6.out.h\
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../ld/elf64.h\
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../ld/elf.h\
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../6l/compat.h\
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@ -42,4 +42,4 @@ install: $(TARG)
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go.o: ../ld/go.c
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elf64.o: ../ld/elf64.c
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elf.o: ../ld/elf.c
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519
src/cmd/6l/asm.c
519
src/cmd/6l/asm.c
@ -29,7 +29,7 @@
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// THE SOFTWARE.
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#include "l.h"
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#include "../ld/elf64.h"
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#include "../ld/elf.h"
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#define Dbufslop 100
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@ -121,18 +121,276 @@ strnput(char *s, int n)
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}
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}
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vlong
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addstring(Sym *s, char *str)
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{
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int n, m;
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vlong r;
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Prog *p;
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if(s->type == 0)
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s->type = SDATA;
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s->reachable = 1;
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r = s->value;
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n = strlen(str)+1;
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while(n > 0) {
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m = n;
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if(m > sizeof(p->to.scon))
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m = sizeof(p->to.scon);
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p = newdata(s, s->value, m, D_EXTERN);
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p->to.type = D_SCONST;
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memmove(p->to.scon, str, m);
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s->value += m;
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str += m;
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n -= m;
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}
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return r;
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}
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vlong
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adduint32(Sym *s, uint32 v)
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{
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vlong r;
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Prog *p;
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if(s->type == 0)
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s->type = SDATA;
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s->reachable = 1;
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r = s->value;
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p = newdata(s, s->value, 4, D_EXTERN);
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s->value += 4;
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p->to.type = D_CONST;
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p->to.offset = v;
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return r;
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}
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vlong
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adduint64(Sym *s, uint64 v)
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{
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vlong r;
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Prog *p;
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if(s->type == 0)
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s->type = SDATA;
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s->reachable = 1;
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r = s->value;
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p = newdata(s, s->value, 8, D_EXTERN);
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s->value += 8;
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p->to.type = D_CONST;
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p->to.offset = v;
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return r;
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}
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vlong
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addaddr(Sym *s, Sym *t)
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{
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vlong r;
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Prog *p;
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enum { Ptrsize = 8 };
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if(s->type == 0)
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s->type = SDATA;
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s->reachable = 1;
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r = s->value;
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p = newdata(s, s->value, Ptrsize, D_EXTERN);
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s->value += Ptrsize;
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p->to.type = D_ADDR;
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p->to.index = D_EXTERN;
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p->to.offset = 0;
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p->to.sym = t;
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return r;
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}
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vlong
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addsize(Sym *s, Sym *t)
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{
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vlong r;
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Prog *p;
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enum { Ptrsize = 8 };
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if(s->type == 0)
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s->type = SDATA;
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s->reachable = 1;
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r = s->value;
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p = newdata(s, s->value, Ptrsize, D_EXTERN);
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s->value += Ptrsize;
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p->to.type = D_SIZE;
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p->to.index = D_EXTERN;
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p->to.offset = 0;
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p->to.sym = t;
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return r;
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}
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vlong
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datoff(vlong addr)
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{
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if(addr >= INITDAT)
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return addr - INITDAT + rnd(HEADR+textsize, INITRND);
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diag("datoff %#llx", addr);
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return 0;
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}
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int nrela;
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enum {
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ElfStrEmpty,
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ElfStrInterp,
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ElfStrHash,
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ElfStrGot,
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ElfStrGotPlt,
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ElfStrDynamic,
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ElfStrDynsym,
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ElfStrDynstr,
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ElfStrRela,
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ElfStrText,
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ElfStrData,
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ElfStrBss,
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ElfStrGosymtab,
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ElfStrGopclntab,
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ElfStrShstrtab,
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NElfStr
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};
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vlong elfstr[NElfStr];
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void
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doelf(void)
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{
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Sym *s, *shstrtab;
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if(HEADTYPE != 7)
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return;
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/* predefine strings we need for section headers */
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shstrtab = lookup(".shstrtab", 0);
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elfstr[ElfStrEmpty] = addstring(shstrtab, "");
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elfstr[ElfStrText] = addstring(shstrtab, ".text");
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elfstr[ElfStrData] = addstring(shstrtab, ".data");
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elfstr[ElfStrBss] = addstring(shstrtab, ".bss");
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if(!debug['s']) {
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elfstr[ElfStrGosymtab] = addstring(shstrtab, ".gosymtab");
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elfstr[ElfStrGopclntab] = addstring(shstrtab, ".gopclntab");
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}
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elfstr[ElfStrShstrtab] = addstring(shstrtab, ".shstrtab");
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if(!debug['d']) { /* -d suppresses dynamic loader format */
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elfstr[ElfStrInterp] = addstring(shstrtab, ".interp");
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elfstr[ElfStrHash] = addstring(shstrtab, ".hash");
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elfstr[ElfStrGot] = addstring(shstrtab, ".got");
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elfstr[ElfStrGotPlt] = addstring(shstrtab, ".got.plt");
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elfstr[ElfStrDynamic] = addstring(shstrtab, ".dynamic");
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elfstr[ElfStrDynsym] = addstring(shstrtab, ".dynsym");
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elfstr[ElfStrDynstr] = addstring(shstrtab, ".dynstr");
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elfstr[ElfStrRela] = addstring(shstrtab, ".rela");
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/* interpreter string */
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s = lookup(".interp", 0);
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s->reachable = 1;
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s->type = SDATA; // TODO: rodata
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addstring(lookup(".interp", 0), linuxdynld);
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/* hash table - empty for now */
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s = lookup(".hash", 0);
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s->type = SDATA; // TODO: rodata
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s->reachable = 1;
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s->value += 8; // two leading zeros
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/* dynamic symbol table - first entry all zeros */
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s = lookup(".dynsym", 0);
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s->type = SDATA;
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s->reachable = 1;
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s->value += ELF64SYMSIZE;
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/* dynamic string table */
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s = lookup(".dynstr", 0);
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addstring(s, "");
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/* relocation table */
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s = lookup(".rela", 0);
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s->reachable = 1;
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s->type = SDATA;
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/* global offset table */
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s = lookup(".got", 0);
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s->reachable = 1;
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s->type = SDATA;
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/* got.plt - ??? */
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s = lookup(".got.plt", 0);
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s->reachable = 1;
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s->type = SDATA;
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/* define dynamic elf table */
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s = lookup(".dynamic", 0);
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elfwritedynentsym(s, DT_HASH, lookup(".hash", 0));
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elfwritedynentsym(s, DT_SYMTAB, lookup(".dynsym", 0));
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elfwritedynent(s, DT_SYMENT, ELF64SYMSIZE);
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elfwritedynentsym(s, DT_STRTAB, lookup(".dynstr", 0));
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elfwritedynentsymsize(s, DT_STRSZ, lookup(".dynstr", 0));
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elfwritedynentsym(s, DT_RELA, lookup(".rela", 0));
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elfwritedynentsymsize(s, DT_RELASZ, lookup(".rela", 0));
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elfwritedynent(s, DT_RELAENT, ELF64RELASIZE);
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elfwritedynent(s, DT_NULL, 0);
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}
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/*
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putc = lookup("main·putc", 0);
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if(putc->type != SDATA && putc->type != SBSS)
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return;
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// smash main.putc with putc
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s = lookup(".elfrela", 0);
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s->type = SDATA;
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s->value = 24;
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p = newdata(s, 0, 8, D_EXTERN); // r_offset
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p->to.type = D_ADDR;
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p->to.index = D_EXTERN;
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p->to.sym = putc;
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p = newdata(s, 8, 8, D_EXTERN); // r_info
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p->to.type = D_CONST;
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p->to.offset = ELF64_R_INFO(0, 1); // use 0 as symbol value; 1 is S+A calculation
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p = newdata(s, 16, 8, D_EXTERN); // r_addend
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p->to.type = D_CONST;
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p->to.offset = 1000;
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nrela = 1;
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*/
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}
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void
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shsym(Elf64_Shdr *sh, Sym *s)
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{
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sh->addr = symaddr(s);
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sh->off = datoff(sh->addr);
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sh->size = s->size;
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}
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void
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phsh(Elf64_Phdr *ph, Elf64_Shdr *sh)
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{
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ph->vaddr = sh->addr;
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ph->paddr = ph->vaddr;
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ph->off = sh->off;
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ph->filesz = sh->size;
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ph->memsz = sh->size;
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ph->align = sh->addralign;
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}
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void
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asmb(void)
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{
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Prog *p;
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int32 v, magic;
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int a, nl;
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int a, nl, dynsym;
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uchar *op1;
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vlong vl, va, startva, fo, w, symo, hashoff, dstrtab, off;
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vlong vl, va, startva, fo, w, symo;
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vlong symdatva = 0x99LL<<32;
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Elf64Hdr *eh;
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Elf64PHdr *ph, *pph;
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Elf64SHdr *sh;
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Elf64_Ehdr *eh;
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Elf64_Phdr *ph, *pph;
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Elf64_Shdr *sh;
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if(debug['v'])
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Bprint(&bso, "%5.2f asmb\n", cputime());
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@ -200,7 +458,6 @@ asmb(void)
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debug['8'] = 1; /* 64-bit addresses */
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v = rnd(HEADR+textsize, INITRND);
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seek(cout, v, 0);
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elf64init();
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break;
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}
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@ -422,143 +679,53 @@ asmb(void)
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case 7:
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/* elf amd-64 */
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eh = getElf64_Ehdr();
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fo = 0;
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startva = INITTEXT - HEADR;
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va = startva;
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w = HEADR+textsize;
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/* This null SHdr must appear before all others */
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sh = newElf64SHdr("");
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sh = newElf64_Shdr(elfstr[ElfStrEmpty]);
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pph = nil; /* silence compiler */
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dstrtab = 0;
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/* Dynamic linking sections */
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if (!debug['d']) { /* -d suppresses dynamic loader format */
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/* P headers */
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/* program header info */
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pph = newElf64PHdr();
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pph = newElf64_Phdr();
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pph->type = PT_PHDR;
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pph->flags = PF_R + PF_X;
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pph->off = ELF64HDRSIZE;
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pph->off = eh->ehsize;
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pph->vaddr = startva + pph->off;
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pph->paddr = startva + pph->off;
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pph->align = INITRND;
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if(!debug['d']) {
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/* interpreter */
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ph = newElf64PHdr();
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sh = newElf64_Shdr(elfstr[ElfStrInterp]);
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sh->type = SHT_PROGBITS;
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sh->flags = SHF_ALLOC;
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sh->addralign = 1;
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shsym(sh, lookup(".interp", 0));
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ph = newElf64_Phdr();
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ph->type = PT_INTERP;
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ph->flags = PF_R;
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ph->off = startelf();
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ph->vaddr = startva + ph->off;
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ph->paddr = startva + ph->off;
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write(cout, linuxdynld, sizeof linuxdynld);
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ph->filesz = endelf() - ph->off;
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ph->align = 1;
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/* S header for interpreter */
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sh = newElf64SHdr(".interp");
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sh->type = SHT_PROGBITS;
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sh->flags = SHF_ALLOC;
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sh->off = ph->off;
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sh->addr = startva + sh->off;
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sh->size = ph->filesz;
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sh->addralign = 1;
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/* S headers inside dynamic load section */
|
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sh = newElf64SHdr(".hash");
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sh->type = SHT_HASH;
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sh->flags = SHF_ALLOC;
|
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sh->entsize = 4;
|
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sh->off = startelf();
|
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hashoff = sh->off;
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sh->addr = startva + sh->off;
|
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/* temporary hack: 8 zeroes means 0 buckets, 0 chains */
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write(cout, zeroes, 8);
|
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sh->size = endelf() - sh->off;
|
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sh->addralign = 8;
|
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|
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sh = newElf64SHdr(".got");
|
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sh->type = SHT_PROGBITS;
|
||||
sh->flags = SHF_ALLOC+SHF_WRITE;
|
||||
sh->entsize = 8;
|
||||
sh->off = startelf();
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sh->addr = startva + sh->off;
|
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sh->size = endelf() - sh->off;
|
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sh->addralign = 8;
|
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|
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sh = newElf64SHdr(".got.plt");
|
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sh->type = SHT_PROGBITS;
|
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sh->flags = SHF_ALLOC+SHF_WRITE;
|
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sh->entsize = 8;
|
||||
sh->off = startelf();
|
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sh->addr = startva + sh->off;
|
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sh->size = endelf() - sh->off;
|
||||
sh->addralign = 8;
|
||||
|
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sh = newElf64SHdr(".dynamic");
|
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sh->type = SHT_DYNAMIC;
|
||||
sh->flags = SHF_ALLOC+SHF_WRITE;
|
||||
sh->entsize = 16;
|
||||
sh->addr = startva + sh->off;
|
||||
sh->off = startelf();
|
||||
elf64writedynent(DT_HASH, startva+hashoff);
|
||||
elf64writedynent(DT_SYMTAB, startva);
|
||||
elf64writedynent(DT_RELA, startva);
|
||||
elf64writedynent(DT_RELASZ, 0); // size of the whole rela in bytes
|
||||
elf64writedynent(DT_RELAENT, ELF64RELASIZE);
|
||||
elf64writedynent(DT_SYMENT, 0);
|
||||
// elf64writedynent(DT_NEEDED, elf64addstr("libc.so.6"));
|
||||
|
||||
/* make space for these now but fill them in later */
|
||||
cflush();
|
||||
dstrtab = seek(cout, 0, 1);
|
||||
elf64writedynent(DT_STRTAB, -1);
|
||||
elf64writedynent(DT_STRSZ, -1);
|
||||
|
||||
elf64writedynent(DT_NULL, 0);
|
||||
sh->size = endelf() - sh->off;
|
||||
sh->addralign = 8;
|
||||
|
||||
/* PT_DYNAMIC for .dynamic section */
|
||||
ph = newElf64PHdr();
|
||||
ph->type = PT_DYNAMIC;
|
||||
ph->flags = PF_R + PF_W;
|
||||
ph->off = sh->off;
|
||||
ph->vaddr = startva + ph->off;
|
||||
ph->paddr = startva + ph->off;
|
||||
ph->filesz = sh->size;
|
||||
ph->memsz = sh->size;
|
||||
ph->align = 8;
|
||||
|
||||
/* PT_LOAD for all dynamic sections */
|
||||
ph = newElf64PHdr();
|
||||
ph->type = PT_LOAD;
|
||||
ph->flags = PF_R + PF_W;
|
||||
ph->off = 0;
|
||||
ph->vaddr = startva + ph->off;
|
||||
ph->paddr = startva + ph->off;
|
||||
ph->filesz = sh->off + sh->size - ph->off;
|
||||
ph->memsz = ph->filesz;
|
||||
ph->align = INITRND;
|
||||
phsh(ph, sh);
|
||||
}
|
||||
|
||||
ph = newElf64PHdr();
|
||||
ph = newElf64_Phdr();
|
||||
ph->type = PT_LOAD;
|
||||
ph->flags = PF_X+PF_R;
|
||||
ph->vaddr = va + ELF64RESERVE;
|
||||
ph->paddr = va + ELF64RESERVE;
|
||||
ph->off = ELF64RESERVE;
|
||||
ph->filesz = w - ELF64RESERVE;
|
||||
ph->memsz = w - ELF64RESERVE;
|
||||
ph->vaddr = va;
|
||||
ph->paddr = va;
|
||||
ph->off = 0;
|
||||
ph->filesz = w;
|
||||
ph->memsz = w;
|
||||
ph->align = INITRND;
|
||||
|
||||
fo = rnd(fo+w, INITRND);
|
||||
va = rnd(va+w, INITRND);
|
||||
w = datsize;
|
||||
|
||||
ph = newElf64PHdr();
|
||||
ph = newElf64_Phdr();
|
||||
ph->type = PT_LOAD;
|
||||
ph->flags = PF_W+PF_R;
|
||||
ph->off = fo;
|
||||
@ -569,7 +736,7 @@ asmb(void)
|
||||
ph->align = INITRND;
|
||||
|
||||
if(!debug['s']) {
|
||||
ph = newElf64PHdr();
|
||||
ph = newElf64_Phdr();
|
||||
ph->type = PT_LOAD;
|
||||
ph->flags = PF_W+PF_R;
|
||||
ph->off = symo;
|
||||
@ -580,16 +747,78 @@ asmb(void)
|
||||
ph->align = INITRND;
|
||||
}
|
||||
|
||||
ph = newElf64PHdr();
|
||||
/* Dynamic linking sections */
|
||||
if (!debug['d']) { /* -d suppresses dynamic loader format */
|
||||
/* S headers for dynamic linking */
|
||||
sh = newElf64_Shdr(elfstr[ElfStrHash]);
|
||||
sh->type = SHT_HASH;
|
||||
sh->flags = SHF_ALLOC;
|
||||
sh->entsize = 4;
|
||||
sh->addralign = 8;
|
||||
// sh->link = xxx;
|
||||
shsym(sh, lookup(".hash", 0));
|
||||
|
||||
sh = newElf64_Shdr(elfstr[ElfStrGot]);
|
||||
sh->type = SHT_PROGBITS;
|
||||
sh->flags = SHF_ALLOC+SHF_WRITE;
|
||||
sh->entsize = 8;
|
||||
sh->addralign = 8;
|
||||
shsym(sh, lookup(".got", 0));
|
||||
|
||||
sh = newElf64_Shdr(elfstr[ElfStrGotPlt]);
|
||||
sh->type = SHT_PROGBITS;
|
||||
sh->flags = SHF_ALLOC+SHF_WRITE;
|
||||
sh->entsize = 8;
|
||||
sh->addralign = 8;
|
||||
shsym(sh, lookup(".got.plt", 0));
|
||||
|
||||
dynsym = eh->shnum;
|
||||
sh = newElf64_Shdr(elfstr[ElfStrDynsym]);
|
||||
sh->type = SHT_DYNSYM;
|
||||
sh->flags = SHF_ALLOC;
|
||||
sh->entsize = 1;
|
||||
sh->addralign = 8;
|
||||
sh->link = dynsym+1; // dynstr
|
||||
// sh->info = index of first non-local symbol (number of local symbols)
|
||||
shsym(sh, lookup(".dynsym", 0));
|
||||
|
||||
sh = newElf64_Shdr(elfstr[ElfStrDynstr]);
|
||||
sh->type = SHT_STRTAB;
|
||||
sh->flags = SHF_ALLOC;
|
||||
sh->addralign = 1;
|
||||
shsym(sh, lookup(".dynstr", 0));
|
||||
|
||||
sh = newElf64_Shdr(elfstr[ElfStrRela]);
|
||||
sh->type = SHT_RELA;
|
||||
sh->flags = SHF_ALLOC;
|
||||
sh->addralign = 8;
|
||||
sh->link = dynsym;
|
||||
shsym(sh, lookup(".rela", 0));
|
||||
|
||||
/* sh and PT_DYNAMIC for .dynamic section */
|
||||
sh = newElf64_Shdr(elfstr[ElfStrDynamic]);
|
||||
sh->type = SHT_DYNAMIC;
|
||||
sh->flags = SHF_ALLOC+SHF_WRITE;
|
||||
sh->entsize = 16;
|
||||
sh->addralign = 8;
|
||||
sh->link = dynsym+1; // dynstr
|
||||
shsym(sh, lookup(".dynamic", 0));
|
||||
ph = newElf64_Phdr();
|
||||
ph->type = PT_DYNAMIC;
|
||||
ph->flags = PF_R + PF_W;
|
||||
phsh(ph, sh);
|
||||
}
|
||||
|
||||
ph = newElf64_Phdr();
|
||||
ph->type = 0x6474e551; /* GNU_STACK */
|
||||
ph->flags = PF_W+PF_R;
|
||||
ph->align = 8;
|
||||
|
||||
fo = ELF64RESERVE;
|
||||
fo = ELFRESERVE;
|
||||
va = startva + fo;
|
||||
w = textsize;
|
||||
|
||||
sh = newElf64SHdr(".text");
|
||||
sh = newElf64_Shdr(elfstr[ElfStrText]);
|
||||
sh->type = SHT_PROGBITS;
|
||||
sh->flags = SHF_ALLOC+SHF_EXECINSTR;
|
||||
sh->addr = va;
|
||||
@ -601,7 +830,7 @@ asmb(void)
|
||||
va = rnd(va+w, INITRND);
|
||||
w = datsize;
|
||||
|
||||
sh = newElf64SHdr(".data");
|
||||
sh = newElf64_Shdr(elfstr[ElfStrData]);
|
||||
sh->type = SHT_PROGBITS;
|
||||
sh->flags = SHF_WRITE+SHF_ALLOC;
|
||||
sh->addr = va;
|
||||
@ -613,7 +842,7 @@ asmb(void)
|
||||
va += w;
|
||||
w = bsssize;
|
||||
|
||||
sh = newElf64SHdr(".bss");
|
||||
sh = newElf64_Shdr(elfstr[ElfStrBss]);
|
||||
sh->type = SHT_NOBITS;
|
||||
sh->flags = SHF_WRITE+SHF_ALLOC;
|
||||
sh->addr = va;
|
||||
@ -625,7 +854,7 @@ asmb(void)
|
||||
fo = symo+8;
|
||||
w = symsize;
|
||||
|
||||
sh = newElf64SHdr(".gosymtab");
|
||||
sh = newElf64_Shdr(elfstr[ElfStrGosymtab]);
|
||||
sh->type = SHT_PROGBITS;
|
||||
sh->off = fo;
|
||||
sh->size = w;
|
||||
@ -635,7 +864,7 @@ asmb(void)
|
||||
fo += w;
|
||||
w = lcsize;
|
||||
|
||||
sh = newElf64SHdr(".gopclntab");
|
||||
sh = newElf64_Shdr(elfstr[ElfStrGopclntab]);
|
||||
sh->type = SHT_PROGBITS;
|
||||
sh->off = fo;
|
||||
sh->size = w;
|
||||
@ -643,27 +872,12 @@ asmb(void)
|
||||
sh->entsize = 24;
|
||||
}
|
||||
|
||||
sh = newElf64SHdr(".shstrtab");
|
||||
sh = newElf64_Shstrtab(elfstr[ElfStrShstrtab]);
|
||||
sh->type = SHT_STRTAB;
|
||||
sh->off = startelf();
|
||||
sh->addr = sh->off + startva;
|
||||
sh->addralign = 1;
|
||||
elf64writestrtable();
|
||||
sh->size = endelf() - sh->off;
|
||||
|
||||
if(dstrtab != 0) {
|
||||
// update DT_STRTAB entry
|
||||
cflush();
|
||||
off = seek(cout, 0, 1);
|
||||
seek(cout, dstrtab, 0);
|
||||
elf64writedynent(DT_STRTAB, sh->addr);
|
||||
elf64writedynent(DT_STRSZ, sh->size);
|
||||
cflush();
|
||||
seek(cout, off, 0);
|
||||
}
|
||||
shsym(sh, lookup(".shstrtab", 0));
|
||||
|
||||
/* Main header */
|
||||
eh = getElf64Hdr();
|
||||
eh->ident[EI_MAG0] = '\177';
|
||||
eh->ident[EI_MAG1] = 'E';
|
||||
eh->ident[EI_MAG2] = 'L';
|
||||
@ -677,18 +891,16 @@ asmb(void)
|
||||
eh->version = EV_CURRENT;
|
||||
eh->entry = entryvalue();
|
||||
|
||||
if (!debug['d']) {
|
||||
pph->filesz = eh->phnum * ELF64PHDRSIZE;
|
||||
pph->filesz = eh->phnum * eh->phentsize;
|
||||
pph->memsz = pph->filesz;
|
||||
}
|
||||
|
||||
seek(cout, 0, 0);
|
||||
a = 0;
|
||||
a += elf64writehdr();
|
||||
a += elf64writephdrs();
|
||||
a += elf64writeshdrs();
|
||||
if (a > ELF64FULLHDRSIZE) {
|
||||
diag("ELF64FULLHDRSIZE too small:", a);
|
||||
if (a > ELFRESERVE) {
|
||||
diag("ELFRESERVE too small: %d > %d", a, ELFRESERVE);
|
||||
}
|
||||
cflush();
|
||||
|
||||
@ -739,7 +951,7 @@ datblk(int32 s, int32 n)
|
||||
for(p = datap; p != P; p = p->link) {
|
||||
curp = p;
|
||||
if(!p->from.sym->reachable)
|
||||
sysfatal("unreachable symbol in datblk - %s", p->from.sym->name);
|
||||
diag("unreachable symbol in datblk - %s", p->from.sym->name);
|
||||
l = p->from.sym->value + p->from.offset - s;
|
||||
c = p->from.scale;
|
||||
i = 0;
|
||||
@ -795,17 +1007,10 @@ datblk(int32 s, int32 n)
|
||||
}
|
||||
break;
|
||||
|
||||
case D_SBIG:
|
||||
if(debug['a'] && i == 0)
|
||||
outa(c, (uchar*)p->to.sbig, nil, l+s+INITDAT);
|
||||
for(; i<c; i++) {
|
||||
buf.dbuf[l] = p->to.sbig[i];
|
||||
l++;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
o = p->to.offset;
|
||||
if(p->to.type == D_SIZE)
|
||||
o += p->to.sym->size;
|
||||
if(p->to.type == D_ADDR) {
|
||||
if(p->to.index != D_STATIC && p->to.index != D_EXTERN)
|
||||
diag("DADDR type%P", p);
|
||||
|
@ -3,4 +3,4 @@
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
#include "l.h"
|
||||
#include "../ld/elf64.c"
|
||||
#include "../ld/elf.c"
|
@ -120,6 +120,7 @@ struct Sym
|
||||
uchar dupok;
|
||||
uchar reachable;
|
||||
vlong value;
|
||||
vlong size;
|
||||
int32 sig;
|
||||
Sym* link;
|
||||
Prog* text;
|
||||
@ -358,6 +359,7 @@ EXTERN char* EXPTAB;
|
||||
EXTERN Prog undefp;
|
||||
EXTERN vlong textstksiz;
|
||||
EXTERN vlong textarg;
|
||||
extern char thechar;
|
||||
|
||||
#define UP (&undefp)
|
||||
|
||||
@ -373,6 +375,11 @@ int Sconv(Fmt*);
|
||||
void addhist(int32, int);
|
||||
void addstackmark(void);
|
||||
Prog* appendp(Prog*);
|
||||
vlong addstring(Sym*, char*);
|
||||
vlong adduint32(Sym*, uint32);
|
||||
vlong adduint64(Sym*, uint64);
|
||||
vlong addaddr(Sym*, Sym*);
|
||||
vlong addsize(Sym*, Sym*);
|
||||
void asmb(void);
|
||||
void asmdyn(void);
|
||||
void asmins(Prog*);
|
||||
@ -392,6 +399,7 @@ void deadcode(void);
|
||||
void diag(char*, ...);
|
||||
void dobss(void);
|
||||
void dodata(void);
|
||||
void doelf(void);
|
||||
void doinit(void);
|
||||
void doprof1(void);
|
||||
void doprof2(void);
|
||||
@ -438,6 +446,7 @@ void strnput(char*, int);
|
||||
void undef(void);
|
||||
void undefsym(Sym*);
|
||||
vlong vaddr(Adr*);
|
||||
vlong symaddr(Sym*);
|
||||
void vputl(uint64);
|
||||
void wputb(uint16);
|
||||
void wputl(uint16);
|
||||
|
@ -30,7 +30,7 @@
|
||||
|
||||
#define EXTERN
|
||||
#include "l.h"
|
||||
#include "../ld/elf64.h"
|
||||
#include "../ld/elf.h"
|
||||
#include <ar.h>
|
||||
|
||||
char *noname = "<none>";
|
||||
@ -197,7 +197,8 @@ main(int argc, char *argv[])
|
||||
INITRND = 4096;
|
||||
break;
|
||||
case 7: /* elf64 executable */
|
||||
HEADR = ELF64RESERVE;
|
||||
elfinit();
|
||||
HEADR = ELFRESERVE;
|
||||
if(INITTEXT == -1)
|
||||
INITTEXT = (1<<22)+HEADR;
|
||||
if(INITDAT == -1)
|
||||
@ -389,6 +390,7 @@ main(int argc, char *argv[])
|
||||
|
||||
patch();
|
||||
follow();
|
||||
doelf();
|
||||
dodata();
|
||||
dobss();
|
||||
dostkoff();
|
||||
@ -438,7 +440,6 @@ loop:
|
||||
void
|
||||
errorexit(void)
|
||||
{
|
||||
|
||||
if(nerrors) {
|
||||
if(cout >= 0)
|
||||
remove(outfile);
|
||||
|
@ -73,7 +73,7 @@ dodata(void)
|
||||
if(s->type != SBSS)
|
||||
continue;
|
||||
t = s->value;
|
||||
if(t == 0) {
|
||||
if(t == 0 && s->name[0] != '.') {
|
||||
diag("%s: no size", s->name);
|
||||
t = 1;
|
||||
}
|
||||
@ -83,6 +83,7 @@ dodata(void)
|
||||
continue;
|
||||
if(t >= 8)
|
||||
datsize = rnd(datsize, 8);
|
||||
s->size = t;
|
||||
s->value = datsize;
|
||||
datsize += t;
|
||||
s->type = SDATA1;
|
||||
@ -101,6 +102,7 @@ dodata(void)
|
||||
t = s->value;
|
||||
if(t >= 8)
|
||||
datsize = rnd(datsize, 8);
|
||||
s->size = t;
|
||||
s->value = datsize;
|
||||
datsize += t;
|
||||
}
|
||||
@ -124,6 +126,7 @@ dodata(void)
|
||||
if(t > u)
|
||||
continue;
|
||||
u -= t;
|
||||
s->size = t;
|
||||
s->value = datsize;
|
||||
s->type = SDATA;
|
||||
datsize += t;
|
||||
@ -148,6 +151,7 @@ dobss(void)
|
||||
if(s->type != SBSS)
|
||||
continue;
|
||||
t = s->value;
|
||||
s->size = t;
|
||||
if(t >= 8)
|
||||
bsssize = rnd(bsssize, 8);
|
||||
s->value = bsssize + datsize;
|
||||
|
@ -185,7 +185,7 @@ putsymb(char *s, int t, vlong v, int ver, Sym *go)
|
||||
gv = 0;
|
||||
if(go) {
|
||||
if(!go->reachable)
|
||||
sysfatal("unreachable type %s", go->name);
|
||||
diag("unreachable type %s", go->name);
|
||||
gv = go->value+INITDAT;
|
||||
}
|
||||
if(l == 8)
|
||||
@ -268,7 +268,6 @@ asmsym(void)
|
||||
/* frame, auto and param after */
|
||||
putsymb(".frame", 'm', p->to.offset+8, 0, 0);
|
||||
|
||||
/* TODO(rsc): Add types for D_AUTO and D_PARAM */
|
||||
for(a=p->to.autom; a; a=a->link)
|
||||
if(a->type == D_AUTO)
|
||||
putsymb(a->asym->name, 'a', -a->aoffset, 0, a->gotype);
|
||||
@ -673,6 +672,18 @@ put8(vlong v)
|
||||
andptr += 8;
|
||||
}
|
||||
|
||||
vlong
|
||||
symaddr(Sym *s)
|
||||
{
|
||||
Adr a;
|
||||
|
||||
a.type = D_ADDR;
|
||||
a.index = D_EXTERN;
|
||||
a.offset = 0;
|
||||
a.sym = s;
|
||||
return vaddr(&a);
|
||||
}
|
||||
|
||||
vlong
|
||||
vaddr(Adr *a)
|
||||
{
|
||||
@ -697,14 +708,14 @@ vaddr(Adr *a)
|
||||
case STEXT:
|
||||
case SCONST:
|
||||
if(!s->reachable)
|
||||
sysfatal("unreachable symbol in vaddr - %s", s->name);
|
||||
diag("unreachable symbol in vaddr - %s", s->name);
|
||||
if((uvlong)s->value < (uvlong)INITTEXT)
|
||||
v += INITTEXT; /* TO DO */
|
||||
v += s->value;
|
||||
break;
|
||||
default:
|
||||
if(!s->reachable)
|
||||
sysfatal("unreachable symbol in vaddr - %s", s->name);
|
||||
diag("unreachable symbol in vaddr - %s", s->name);
|
||||
v += INITDAT + s->value;
|
||||
}
|
||||
}
|
||||
|
@ -449,8 +449,7 @@ enum
|
||||
|
||||
D_INDIR, /* additive */
|
||||
|
||||
D_SBIG = D_INDIR + D_INDIR,
|
||||
D_CONST2,
|
||||
D_CONST2 = D_INDIR+D_INDIR,
|
||||
|
||||
T_TYPE = 1<<0,
|
||||
T_INDEX = 1<<1,
|
||||
|
@ -700,7 +700,7 @@ datblk(int32 s, int32 n)
|
||||
for(p = datap; p != P; p = p->link) {
|
||||
curp = p;
|
||||
if(!p->from.sym->reachable)
|
||||
sysfatal("unreachable symbol in datblk - %s", p->from.sym->name);
|
||||
diag("unreachable symbol in datblk - %s", p->from.sym->name);
|
||||
l = p->from.sym->value + p->from.offset - s;
|
||||
c = p->from.scale;
|
||||
i = 0;
|
||||
@ -769,19 +769,6 @@ datblk(int32 s, int32 n)
|
||||
}
|
||||
break;
|
||||
|
||||
case D_SBIG:
|
||||
if(debug['a'] && i == 0) {
|
||||
Bprint(&bso, pcstr, l+s+INITDAT);
|
||||
for(j=0; j<c; j++)
|
||||
Bprint(&bso, "%.2ux", p->to.scon[j] & 0xff);
|
||||
Bprint(&bso, "\t%P\n", curp);
|
||||
}
|
||||
for(; i<c; i++) {
|
||||
buf.dbuf[l] = p->to.sbig[i];
|
||||
l++;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
fl = p->to.offset;
|
||||
if(p->to.type == D_ADDR) {
|
||||
|
@ -2,35 +2,52 @@
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// Support for 64-bit Elf binaries
|
||||
|
||||
#include "../ld/elf64.h"
|
||||
#include "../ld/elf.h"
|
||||
|
||||
/*
|
||||
* We use the 64-bit data structures on both 32- and 64-bit machines
|
||||
* in order to write the code just once. The 64-bit data structure is
|
||||
* written in the 32-bit format on the 32-bit machines.
|
||||
*/
|
||||
#define NSECT 16
|
||||
static int numstr;
|
||||
static int stroffset;
|
||||
static Elf64Hdr hdr;
|
||||
static Elf64PHdr *phdr[NSECT];
|
||||
static Elf64SHdr *shdr[NSECT];
|
||||
|
||||
static int elf64;
|
||||
static Elf64_Ehdr hdr;
|
||||
static Elf64_Phdr *phdr[NSECT];
|
||||
static Elf64_Shdr *shdr[NSECT];
|
||||
static char *sname[NSECT];
|
||||
static char *str[20];
|
||||
|
||||
/*
|
||||
Initialize the global variable that describes the ELF header. It will be updated as
|
||||
we write section and prog headers.
|
||||
*/
|
||||
void
|
||||
elf64init(void)
|
||||
elfinit(void)
|
||||
{
|
||||
switch(thechar) {
|
||||
// 64-bit architectures
|
||||
case '6':
|
||||
elf64 = 1;
|
||||
hdr.phoff = ELF64HDRSIZE; /* Must be be ELF64HDRSIZE: first PHdr must follow ELF header */
|
||||
hdr.shoff = ELF64HDRSIZE; /* Will move as we add PHeaders */
|
||||
hdr.ehsize = ELF64HDRSIZE; /* Must be ELF64HDRSIZE */
|
||||
hdr.phentsize = ELF64PHDRSIZE; /* Must be ELF64PHDRSIZE */
|
||||
hdr.shentsize = ELF64SHDRSIZE; /* Must be ELF64SHDRSIZE */
|
||||
break;
|
||||
|
||||
// 32-bit architectures
|
||||
default:
|
||||
hdr.phoff = ELF32HDRSIZE; /* Must be be ELF32HDRSIZE: first PHdr must follow ELF header */
|
||||
hdr.shoff = ELF32HDRSIZE; /* Will move as we add PHeaders */
|
||||
hdr.ehsize = ELF32HDRSIZE; /* Must be ELF32HDRSIZE */
|
||||
hdr.phentsize = ELF32PHDRSIZE; /* Must be ELF32PHDRSIZE */
|
||||
hdr.shentsize = ELF32SHDRSIZE; /* Must be ELF32SHDRSIZE */
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
elf64phdr(Elf64PHdr *e)
|
||||
elf64phdr(Elf64_Phdr *e)
|
||||
{
|
||||
LPUT(e->type);
|
||||
LPUT(e->flags);
|
||||
@ -43,7 +60,7 @@ elf64phdr(Elf64PHdr *e)
|
||||
}
|
||||
|
||||
void
|
||||
elf64shdr(char *name, Elf64SHdr *e)
|
||||
elf64shdr(char *name, Elf64_Shdr *e)
|
||||
{
|
||||
LPUT(e->name);
|
||||
LPUT(e->type);
|
||||
@ -57,44 +74,6 @@ elf64shdr(char *name, Elf64SHdr *e)
|
||||
VPUT(e->entsize);
|
||||
}
|
||||
|
||||
int
|
||||
putelf64strtab(char* name)
|
||||
{
|
||||
int w;
|
||||
|
||||
w = strlen(name)+1;
|
||||
strnput(name, w);
|
||||
return w;
|
||||
}
|
||||
|
||||
void
|
||||
elf64writestrtable(void)
|
||||
{
|
||||
int i;
|
||||
uint32 size;
|
||||
|
||||
size = 0;
|
||||
for (i = 0; i < numstr; i++)
|
||||
size += putelf64strtab(str[i]);
|
||||
if (size > STRTABSIZE)
|
||||
diag("elf64 string table overflow");
|
||||
}
|
||||
|
||||
uint32
|
||||
elf64addstr(char *name)
|
||||
{
|
||||
int r;
|
||||
|
||||
if (numstr >= nelem(str)) {
|
||||
diag("too many elf strings");
|
||||
return 0;
|
||||
}
|
||||
str[numstr++] = strdup(name);
|
||||
r = stroffset;
|
||||
stroffset += strlen(name)+1;
|
||||
return r;
|
||||
}
|
||||
|
||||
uint32
|
||||
elf64writeshdrs(void)
|
||||
{
|
||||
@ -115,10 +94,10 @@ elf64writephdrs(void)
|
||||
return hdr.phnum * ELF64PHDRSIZE;
|
||||
}
|
||||
|
||||
Elf64PHdr*
|
||||
newElf64PHdr(void)
|
||||
Elf64_Phdr*
|
||||
newElf64_Phdr(void)
|
||||
{
|
||||
Elf64PHdr *e;
|
||||
Elf64_Phdr *e;
|
||||
|
||||
e = malloc(sizeof *e);
|
||||
memset(e, 0, sizeof *e);
|
||||
@ -130,16 +109,21 @@ newElf64PHdr(void)
|
||||
return e;
|
||||
}
|
||||
|
||||
Elf64SHdr*
|
||||
newElf64SHdr(char *name)
|
||||
Elf64_Shdr*
|
||||
newElf64_Shstrtab(vlong name)
|
||||
{
|
||||
Elf64SHdr *e;
|
||||
|
||||
if (strcmp(name, ".shstrtab") == 0)
|
||||
hdr.shstrndx = hdr.shnum;
|
||||
return newElf64_Shdr(name);
|
||||
}
|
||||
|
||||
Elf64_Shdr*
|
||||
newElf64_Shdr(vlong name)
|
||||
{
|
||||
Elf64_Shdr *e;
|
||||
|
||||
e = malloc(sizeof *e);
|
||||
memset(e, 0, sizeof *e);
|
||||
e->name = elf64addstr(name);
|
||||
e->name = name;
|
||||
if (hdr.shnum >= NSECT) {
|
||||
diag("too many shdrs");
|
||||
} else {
|
||||
@ -148,8 +132,8 @@ newElf64SHdr(char *name)
|
||||
return e;
|
||||
}
|
||||
|
||||
Elf64Hdr*
|
||||
getElf64Hdr(void)
|
||||
Elf64_Ehdr*
|
||||
getElf64_Ehdr(void)
|
||||
{
|
||||
return &hdr;
|
||||
}
|
||||
@ -192,41 +176,33 @@ elf64_hash(uchar *name)
|
||||
}
|
||||
|
||||
void
|
||||
elf64writedynent(int tag, uint64 val)
|
||||
elfwritedynent(Sym *s, int tag, uint64 val)
|
||||
{
|
||||
VPUT(tag);
|
||||
VPUT(val);
|
||||
if(elf64) {
|
||||
adduint64(s, tag);
|
||||
adduint64(s, val);
|
||||
} else {
|
||||
adduint32(s, tag);
|
||||
adduint32(s, val);
|
||||
}
|
||||
}
|
||||
|
||||
/* Where to write the next piece of data attached to an SHeader */
|
||||
uint64 elfaddr = ELF64FULLHDRSIZE;
|
||||
|
||||
/* Mark a start location in the SHeader data */
|
||||
uint64
|
||||
startelf(void)
|
||||
void
|
||||
elfwritedynentsym(Sym *s, int tag, Sym *t)
|
||||
{
|
||||
seek(cout, elfaddr, 0);
|
||||
return elfaddr;
|
||||
if(elf64)
|
||||
adduint64(s, tag);
|
||||
else
|
||||
adduint32(s, tag);
|
||||
addaddr(s, t);
|
||||
}
|
||||
|
||||
/* Mark the end of a location in the SHeader data */
|
||||
uint64
|
||||
endelf(void)
|
||||
void
|
||||
elfwritedynentsymsize(Sym *s, int tag, Sym *t)
|
||||
{
|
||||
uint64 p;
|
||||
|
||||
cflush();
|
||||
p = seek(cout, 0, 1);
|
||||
if (p < elfaddr) {
|
||||
diag("endelf before elfaddr");
|
||||
}
|
||||
if ((p & 7) != 0) {
|
||||
p = (p + 7) & ~7LL;
|
||||
seek(cout, p, 0);
|
||||
}
|
||||
elfaddr = p;
|
||||
if (p > ELF64RESERVE) {
|
||||
diag("endelf overflows reserve %lld\n", p);
|
||||
}
|
||||
return elfaddr;
|
||||
if(elf64)
|
||||
adduint64(s, tag);
|
||||
else
|
||||
adduint32(s, tag);
|
||||
addsize(s, t);
|
||||
}
|
665
src/cmd/ld/elf.h
Normal file
665
src/cmd/ld/elf.h
Normal file
@ -0,0 +1,665 @@
|
||||
/*
|
||||
* Derived from:
|
||||
* $FreeBSD: src/sys/sys/elf32.h,v 1.8.14.1 2005/12/30 22:13:58 marcel Exp $
|
||||
* $FreeBSD: src/sys/sys/elf64.h,v 1.10.14.1 2005/12/30 22:13:58 marcel Exp $
|
||||
* $FreeBSD: src/sys/sys/elf_common.h,v 1.15.8.1 2005/12/30 22:13:58 marcel Exp $
|
||||
*
|
||||
* Copyright (c) 1996-1998 John D. Polstra. All rights reserved.
|
||||
* Portions Copyright 2009 The Go Authors. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* ELF definitions that are independent of architecture or word size.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Note header. The ".note" section contains an array of notes. Each
|
||||
* begins with this header, aligned to a word boundary. Immediately
|
||||
* following the note header is n_namesz bytes of name, padded to the
|
||||
* next word boundary. Then comes n_descsz bytes of descriptor, again
|
||||
* padded to a word boundary. The values of n_namesz and n_descsz do
|
||||
* not include the padding.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
uint32 n_namesz; /* Length of name. */
|
||||
uint32 n_descsz; /* Length of descriptor. */
|
||||
uint32 n_type; /* Type of this note. */
|
||||
} Elf_Note;
|
||||
|
||||
/* Indexes into the e_ident array. Keep synced with
|
||||
http://www.sco.com/developer/gabi/ch4.eheader.html */
|
||||
#define EI_MAG0 0 /* Magic number, byte 0. */
|
||||
#define EI_MAG1 1 /* Magic number, byte 1. */
|
||||
#define EI_MAG2 2 /* Magic number, byte 2. */
|
||||
#define EI_MAG3 3 /* Magic number, byte 3. */
|
||||
#define EI_CLASS 4 /* Class of machine. */
|
||||
#define EI_DATA 5 /* Data format. */
|
||||
#define EI_VERSION 6 /* ELF format version. */
|
||||
#define EI_OSABI 7 /* Operating system / ABI identification */
|
||||
#define EI_ABIVERSION 8 /* ABI version */
|
||||
#define OLD_EI_BRAND 8 /* Start of architecture identification. */
|
||||
#define EI_PAD 9 /* Start of padding (per SVR4 ABI). */
|
||||
#define EI_NIDENT 16 /* Size of e_ident array. */
|
||||
|
||||
/* Values for the magic number bytes. */
|
||||
#define ELFMAG0 0x7f
|
||||
#define ELFMAG1 'E'
|
||||
#define ELFMAG2 'L'
|
||||
#define ELFMAG3 'F'
|
||||
#define ELFMAG "\177ELF" /* magic string */
|
||||
#define SELFMAG 4 /* magic string size */
|
||||
|
||||
/* Values for e_ident[EI_VERSION] and e_version. */
|
||||
#define EV_NONE 0
|
||||
#define EV_CURRENT 1
|
||||
|
||||
/* Values for e_ident[EI_CLASS]. */
|
||||
#define ELFCLASSNONE 0 /* Unknown class. */
|
||||
#define ELFCLASS32 1 /* 32-bit architecture. */
|
||||
#define ELFCLASS64 2 /* 64-bit architecture. */
|
||||
|
||||
/* Values for e_ident[EI_DATA]. */
|
||||
#define ELFDATANONE 0 /* Unknown data format. */
|
||||
#define ELFDATA2LSB 1 /* 2's complement little-endian. */
|
||||
#define ELFDATA2MSB 2 /* 2's complement big-endian. */
|
||||
|
||||
/* Values for e_ident[EI_OSABI]. */
|
||||
#define ELFOSABI_NONE 0 /* UNIX System V ABI */
|
||||
#define ELFOSABI_HPUX 1 /* HP-UX operating system */
|
||||
#define ELFOSABI_NETBSD 2 /* NetBSD */
|
||||
#define ELFOSABI_LINUX 3 /* GNU/Linux */
|
||||
#define ELFOSABI_HURD 4 /* GNU/Hurd */
|
||||
#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */
|
||||
#define ELFOSABI_SOLARIS 6 /* Solaris */
|
||||
#define ELFOSABI_AIX 7 /* AIX */
|
||||
#define ELFOSABI_IRIX 8 /* IRIX */
|
||||
#define ELFOSABI_FREEBSD 9 /* FreeBSD */
|
||||
#define ELFOSABI_TRU64 10 /* TRU64 UNIX */
|
||||
#define ELFOSABI_MODESTO 11 /* Novell Modesto */
|
||||
#define ELFOSABI_OPENBSD 12 /* OpenBSD */
|
||||
#define ELFOSABI_OPENVMS 13 /* Open VMS */
|
||||
#define ELFOSABI_NSK 14 /* HP Non-Stop Kernel */
|
||||
#define ELFOSABI_ARM 97 /* ARM */
|
||||
#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
|
||||
|
||||
#define ELFOSABI_SYSV ELFOSABI_NONE /* symbol used in old spec */
|
||||
#define ELFOSABI_MONTEREY ELFOSABI_AIX /* Monterey */
|
||||
|
||||
/* e_ident */
|
||||
#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
|
||||
(ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
|
||||
(ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
|
||||
(ehdr).e_ident[EI_MAG3] == ELFMAG3)
|
||||
|
||||
/* Values for e_type. */
|
||||
#define ET_NONE 0 /* Unknown type. */
|
||||
#define ET_REL 1 /* Relocatable. */
|
||||
#define ET_EXEC 2 /* Executable. */
|
||||
#define ET_DYN 3 /* Shared object. */
|
||||
#define ET_CORE 4 /* Core file. */
|
||||
#define ET_LOOS 0xfe00 /* First operating system specific. */
|
||||
#define ET_HIOS 0xfeff /* Last operating system-specific. */
|
||||
#define ET_LOPROC 0xff00 /* First processor-specific. */
|
||||
#define ET_HIPROC 0xffff /* Last processor-specific. */
|
||||
|
||||
/* Values for e_machine. */
|
||||
#define EM_NONE 0 /* Unknown machine. */
|
||||
#define EM_M32 1 /* AT&T WE32100. */
|
||||
#define EM_SPARC 2 /* Sun SPARC. */
|
||||
#define EM_386 3 /* Intel i386. */
|
||||
#define EM_68K 4 /* Motorola 68000. */
|
||||
#define EM_88K 5 /* Motorola 88000. */
|
||||
#define EM_860 7 /* Intel i860. */
|
||||
#define EM_MIPS 8 /* MIPS R3000 Big-Endian only. */
|
||||
#define EM_S370 9 /* IBM System/370. */
|
||||
#define EM_MIPS_RS3_LE 10 /* MIPS R3000 Little-Endian. */
|
||||
#define EM_PARISC 15 /* HP PA-RISC. */
|
||||
#define EM_VPP500 17 /* Fujitsu VPP500. */
|
||||
#define EM_SPARC32PLUS 18 /* SPARC v8plus. */
|
||||
#define EM_960 19 /* Intel 80960. */
|
||||
#define EM_PPC 20 /* PowerPC 32-bit. */
|
||||
#define EM_PPC64 21 /* PowerPC 64-bit. */
|
||||
#define EM_S390 22 /* IBM System/390. */
|
||||
#define EM_V800 36 /* NEC V800. */
|
||||
#define EM_FR20 37 /* Fujitsu FR20. */
|
||||
#define EM_RH32 38 /* TRW RH-32. */
|
||||
#define EM_RCE 39 /* Motorola RCE. */
|
||||
#define EM_ARM 40 /* ARM. */
|
||||
#define EM_SH 42 /* Hitachi SH. */
|
||||
#define EM_SPARCV9 43 /* SPARC v9 64-bit. */
|
||||
#define EM_TRICORE 44 /* Siemens TriCore embedded processor. */
|
||||
#define EM_ARC 45 /* Argonaut RISC Core. */
|
||||
#define EM_H8_300 46 /* Hitachi H8/300. */
|
||||
#define EM_H8_300H 47 /* Hitachi H8/300H. */
|
||||
#define EM_H8S 48 /* Hitachi H8S. */
|
||||
#define EM_H8_500 49 /* Hitachi H8/500. */
|
||||
#define EM_IA_64 50 /* Intel IA-64 Processor. */
|
||||
#define EM_MIPS_X 51 /* Stanford MIPS-X. */
|
||||
#define EM_COLDFIRE 52 /* Motorola ColdFire. */
|
||||
#define EM_68HC12 53 /* Motorola M68HC12. */
|
||||
#define EM_MMA 54 /* Fujitsu MMA. */
|
||||
#define EM_PCP 55 /* Siemens PCP. */
|
||||
#define EM_NCPU 56 /* Sony nCPU. */
|
||||
#define EM_NDR1 57 /* Denso NDR1 microprocessor. */
|
||||
#define EM_STARCORE 58 /* Motorola Star*Core processor. */
|
||||
#define EM_ME16 59 /* Toyota ME16 processor. */
|
||||
#define EM_ST100 60 /* STMicroelectronics ST100 processor. */
|
||||
#define EM_TINYJ 61 /* Advanced Logic Corp. TinyJ processor. */
|
||||
#define EM_X86_64 62 /* Advanced Micro Devices x86-64 */
|
||||
|
||||
/* Non-standard or deprecated. */
|
||||
#define EM_486 6 /* Intel i486. */
|
||||
#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */
|
||||
#define EM_ALPHA_STD 41 /* Digital Alpha (standard value). */
|
||||
#define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI) */
|
||||
|
||||
/* Special section indexes. */
|
||||
#define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */
|
||||
#define SHN_LORESERVE 0xff00 /* First of reserved range. */
|
||||
#define SHN_LOPROC 0xff00 /* First processor-specific. */
|
||||
#define SHN_HIPROC 0xff1f /* Last processor-specific. */
|
||||
#define SHN_LOOS 0xff20 /* First operating system-specific. */
|
||||
#define SHN_HIOS 0xff3f /* Last operating system-specific. */
|
||||
#define SHN_ABS 0xfff1 /* Absolute values. */
|
||||
#define SHN_COMMON 0xfff2 /* Common data. */
|
||||
#define SHN_XINDEX 0xffff /* Escape -- index stored elsewhere. */
|
||||
#define SHN_HIRESERVE 0xffff /* Last of reserved range. */
|
||||
|
||||
/* sh_type */
|
||||
#define SHT_NULL 0 /* inactive */
|
||||
#define SHT_PROGBITS 1 /* program defined information */
|
||||
#define SHT_SYMTAB 2 /* symbol table section */
|
||||
#define SHT_STRTAB 3 /* string table section */
|
||||
#define SHT_RELA 4 /* relocation section with addends */
|
||||
#define SHT_HASH 5 /* symbol hash table section */
|
||||
#define SHT_DYNAMIC 6 /* dynamic section */
|
||||
#define SHT_NOTE 7 /* note section */
|
||||
#define SHT_NOBITS 8 /* no space section */
|
||||
#define SHT_REL 9 /* relocation section - no addends */
|
||||
#define SHT_SHLIB 10 /* reserved - purpose unknown */
|
||||
#define SHT_DYNSYM 11 /* dynamic symbol table section */
|
||||
#define SHT_INIT_ARRAY 14 /* Initialization function pointers. */
|
||||
#define SHT_FINI_ARRAY 15 /* Termination function pointers. */
|
||||
#define SHT_PREINIT_ARRAY 16 /* Pre-initialization function ptrs. */
|
||||
#define SHT_GROUP 17 /* Section group. */
|
||||
#define SHT_SYMTAB_SHNDX 18 /* Section indexes (see SHN_XINDEX). */
|
||||
#define SHT_LOOS 0x60000000 /* First of OS specific semantics */
|
||||
#define SHT_HIOS 0x6fffffff /* Last of OS specific semantics */
|
||||
#define SHT_LOPROC 0x70000000 /* reserved range for processor */
|
||||
#define SHT_HIPROC 0x7fffffff /* specific section header types */
|
||||
#define SHT_LOUSER 0x80000000 /* reserved range for application */
|
||||
#define SHT_HIUSER 0xffffffff /* specific indexes */
|
||||
|
||||
/* Flags for sh_flags. */
|
||||
#define SHF_WRITE 0x1 /* Section contains writable data. */
|
||||
#define SHF_ALLOC 0x2 /* Section occupies memory. */
|
||||
#define SHF_EXECINSTR 0x4 /* Section contains instructions. */
|
||||
#define SHF_MERGE 0x10 /* Section may be merged. */
|
||||
#define SHF_STRINGS 0x20 /* Section contains strings. */
|
||||
#define SHF_INFO_LINK 0x40 /* sh_info holds section index. */
|
||||
#define SHF_LINK_ORDER 0x80 /* Special ordering requirements. */
|
||||
#define SHF_OS_NONCONFORMING 0x100 /* OS-specific processing required. */
|
||||
#define SHF_GROUP 0x200 /* Member of section group. */
|
||||
#define SHF_TLS 0x400 /* Section contains TLS data. */
|
||||
#define SHF_MASKOS 0x0ff00000 /* OS-specific semantics. */
|
||||
#define SHF_MASKPROC 0xf0000000 /* Processor-specific semantics. */
|
||||
|
||||
/* Values for p_type. */
|
||||
#define PT_NULL 0 /* Unused entry. */
|
||||
#define PT_LOAD 1 /* Loadable segment. */
|
||||
#define PT_DYNAMIC 2 /* Dynamic linking information segment. */
|
||||
#define PT_INTERP 3 /* Pathname of interpreter. */
|
||||
#define PT_NOTE 4 /* Auxiliary information. */
|
||||
#define PT_SHLIB 5 /* Reserved (not used). */
|
||||
#define PT_PHDR 6 /* Location of program header itself. */
|
||||
#define PT_TLS 7 /* Thread local storage segment */
|
||||
#define PT_LOOS 0x60000000 /* First OS-specific. */
|
||||
#define PT_HIOS 0x6fffffff /* Last OS-specific. */
|
||||
#define PT_LOPROC 0x70000000 /* First processor-specific type. */
|
||||
#define PT_HIPROC 0x7fffffff /* Last processor-specific type. */
|
||||
|
||||
/* Values for p_flags. */
|
||||
#define PF_X 0x1 /* Executable. */
|
||||
#define PF_W 0x2 /* Writable. */
|
||||
#define PF_R 0x4 /* Readable. */
|
||||
#define PF_MASKOS 0x0ff00000 /* Operating system-specific. */
|
||||
#define PF_MASKPROC 0xf0000000 /* Processor-specific. */
|
||||
|
||||
/* Values for d_tag. */
|
||||
#define DT_NULL 0 /* Terminating entry. */
|
||||
#define DT_NEEDED 1 /* String table offset of a needed shared
|
||||
library. */
|
||||
#define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */
|
||||
#define DT_PLTGOT 3 /* Processor-dependent address. */
|
||||
#define DT_HASH 4 /* Address of symbol hash table. */
|
||||
#define DT_STRTAB 5 /* Address of string table. */
|
||||
#define DT_SYMTAB 6 /* Address of symbol table. */
|
||||
#define DT_RELA 7 /* Address of ElfNN_Rela relocations. */
|
||||
#define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */
|
||||
#define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */
|
||||
#define DT_STRSZ 10 /* Size of string table. */
|
||||
#define DT_SYMENT 11 /* Size of each symbol table entry. */
|
||||
#define DT_INIT 12 /* Address of initialization function. */
|
||||
#define DT_FINI 13 /* Address of finalization function. */
|
||||
#define DT_SONAME 14 /* String table offset of shared object
|
||||
name. */
|
||||
#define DT_RPATH 15 /* String table offset of library path. [sup] */
|
||||
#define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. [sup] */
|
||||
#define DT_REL 17 /* Address of ElfNN_Rel relocations. */
|
||||
#define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */
|
||||
#define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */
|
||||
#define DT_PLTREL 20 /* Type of relocation used for PLT. */
|
||||
#define DT_DEBUG 21 /* Reserved (not used). */
|
||||
#define DT_TEXTREL 22 /* Indicates there may be relocations in
|
||||
non-writable segments. [sup] */
|
||||
#define DT_JMPREL 23 /* Address of PLT relocations. */
|
||||
#define DT_BIND_NOW 24 /* [sup] */
|
||||
#define DT_INIT_ARRAY 25 /* Address of the array of pointers to
|
||||
initialization functions */
|
||||
#define DT_FINI_ARRAY 26 /* Address of the array of pointers to
|
||||
termination functions */
|
||||
#define DT_INIT_ARRAYSZ 27 /* Size in bytes of the array of
|
||||
initialization functions. */
|
||||
#define DT_FINI_ARRAYSZ 28 /* Size in bytes of the array of
|
||||
terminationfunctions. */
|
||||
#define DT_RUNPATH 29 /* String table offset of a null-terminated
|
||||
library search path string. */
|
||||
#define DT_FLAGS 30 /* Object specific flag values. */
|
||||
#define DT_ENCODING 32 /* Values greater than or equal to DT_ENCODING
|
||||
and less than DT_LOOS follow the rules for
|
||||
the interpretation of the d_un union
|
||||
as follows: even == 'd_ptr', even == 'd_val'
|
||||
or none */
|
||||
#define DT_PREINIT_ARRAY 32 /* Address of the array of pointers to
|
||||
pre-initialization functions. */
|
||||
#define DT_PREINIT_ARRAYSZ 33 /* Size in bytes of the array of
|
||||
pre-initialization functions. */
|
||||
#define DT_LOOS 0x6000000d /* First OS-specific */
|
||||
#define DT_HIOS 0x6ffff000 /* Last OS-specific */
|
||||
#define DT_LOPROC 0x70000000 /* First processor-specific type. */
|
||||
#define DT_HIPROC 0x7fffffff /* Last processor-specific type. */
|
||||
|
||||
/* Values for DT_FLAGS */
|
||||
#define DF_ORIGIN 0x0001 /* Indicates that the object being loaded may
|
||||
make reference to the $ORIGIN substitution
|
||||
string */
|
||||
#define DF_SYMBOLIC 0x0002 /* Indicates "symbolic" linking. */
|
||||
#define DF_TEXTREL 0x0004 /* Indicates there may be relocations in
|
||||
non-writable segments. */
|
||||
#define DF_BIND_NOW 0x0008 /* Indicates that the dynamic linker should
|
||||
process all relocations for the object
|
||||
containing this entry before transferring
|
||||
control to the program. */
|
||||
#define DF_STATIC_TLS 0x0010 /* Indicates that the shared object or
|
||||
executable contains code using a static
|
||||
thread-local storage scheme. */
|
||||
|
||||
/* Values for n_type. Used in core files. */
|
||||
#define NT_PRSTATUS 1 /* Process status. */
|
||||
#define NT_FPREGSET 2 /* Floating point registers. */
|
||||
#define NT_PRPSINFO 3 /* Process state info. */
|
||||
|
||||
/* Symbol Binding - ELFNN_ST_BIND - st_info */
|
||||
#define STB_LOCAL 0 /* Local symbol */
|
||||
#define STB_GLOBAL 1 /* Global symbol */
|
||||
#define STB_WEAK 2 /* like global - lower precedence */
|
||||
#define STB_LOOS 10 /* Reserved range for operating system */
|
||||
#define STB_HIOS 12 /* specific semantics. */
|
||||
#define STB_LOPROC 13 /* reserved range for processor */
|
||||
#define STB_HIPROC 15 /* specific semantics. */
|
||||
|
||||
/* Symbol type - ELFNN_ST_TYPE - st_info */
|
||||
#define STT_NOTYPE 0 /* Unspecified type. */
|
||||
#define STT_OBJECT 1 /* Data object. */
|
||||
#define STT_FUNC 2 /* Function. */
|
||||
#define STT_SECTION 3 /* Section. */
|
||||
#define STT_FILE 4 /* Source file. */
|
||||
#define STT_COMMON 5 /* Uninitialized common block. */
|
||||
#define STT_TLS 6 /* TLS object. */
|
||||
#define STT_LOOS 10 /* Reserved range for operating system */
|
||||
#define STT_HIOS 12 /* specific semantics. */
|
||||
#define STT_LOPROC 13 /* reserved range for processor */
|
||||
#define STT_HIPROC 15 /* specific semantics. */
|
||||
|
||||
/* Symbol visibility - ELFNN_ST_VISIBILITY - st_other */
|
||||
#define STV_DEFAULT 0x0 /* Default visibility (see binding). */
|
||||
#define STV_INTERNAL 0x1 /* Special meaning in relocatable objects. */
|
||||
#define STV_HIDDEN 0x2 /* Not visible. */
|
||||
#define STV_PROTECTED 0x3 /* Visible but not preemptible. */
|
||||
|
||||
/* Special symbol table indexes. */
|
||||
#define STN_UNDEF 0 /* Undefined symbol index. */
|
||||
|
||||
/*
|
||||
* ELF definitions common to all 32-bit architectures.
|
||||
*/
|
||||
|
||||
typedef uint32 Elf32_Addr;
|
||||
typedef uint16 Elf32_Half;
|
||||
typedef uint32 Elf32_Off;
|
||||
typedef int32 Elf32_Sword;
|
||||
typedef uint32 Elf32_Word;
|
||||
|
||||
typedef Elf32_Word Elf32_Hashelt;
|
||||
|
||||
/* Non-standard class-dependent datatype used for abstraction. */
|
||||
typedef Elf32_Word Elf32_Size;
|
||||
typedef Elf32_Sword Elf32_Ssize;
|
||||
|
||||
/*
|
||||
* ELF header.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
unsigned char ident[EI_NIDENT]; /* File identification. */
|
||||
Elf32_Half type; /* File type. */
|
||||
Elf32_Half machine; /* Machine architecture. */
|
||||
Elf32_Word version; /* ELF format version. */
|
||||
Elf32_Addr entry; /* Entry point. */
|
||||
Elf32_Off phoff; /* Program header file offset. */
|
||||
Elf32_Off shoff; /* Section header file offset. */
|
||||
Elf32_Word flags; /* Architecture-specific flags. */
|
||||
Elf32_Half ehsize; /* Size of ELF header in bytes. */
|
||||
Elf32_Half phentsize; /* Size of program header entry. */
|
||||
Elf32_Half phnum; /* Number of program header entries. */
|
||||
Elf32_Half shentsize; /* Size of section header entry. */
|
||||
Elf32_Half shnum; /* Number of section header entries. */
|
||||
Elf32_Half shstrndx; /* Section name strings section. */
|
||||
} Elf32_Ehdr;
|
||||
|
||||
/*
|
||||
* Section header.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
Elf32_Word name; /* Section name (index into the
|
||||
section header string table). */
|
||||
Elf32_Word type; /* Section type. */
|
||||
Elf32_Word flags; /* Section flags. */
|
||||
Elf32_Addr vaddr; /* Address in memory image. */
|
||||
Elf32_Off off; /* Offset in file. */
|
||||
Elf32_Word size; /* Size in bytes. */
|
||||
Elf32_Word link; /* Index of a related section. */
|
||||
Elf32_Word info; /* Depends on section type. */
|
||||
Elf32_Word addralign; /* Alignment in bytes. */
|
||||
Elf32_Word entsize; /* Size of each entry in section. */
|
||||
} Elf32_Shdr;
|
||||
|
||||
/*
|
||||
* Program header.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
Elf32_Word type; /* Entry type. */
|
||||
Elf32_Off off; /* File offset of contents. */
|
||||
Elf32_Addr vaddr; /* Virtual address in memory image. */
|
||||
Elf32_Addr paddr; /* Physical address (not used). */
|
||||
Elf32_Word filesz; /* Size of contents in file. */
|
||||
Elf32_Word memsz; /* Size of contents in memory. */
|
||||
Elf32_Word flags; /* Access permission flags. */
|
||||
Elf32_Word align; /* Alignment in memory and file. */
|
||||
} Elf32_Phdr;
|
||||
|
||||
/*
|
||||
* Dynamic structure. The ".dynamic" section contains an array of them.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
Elf32_Sword d_tag; /* Entry type. */
|
||||
union {
|
||||
Elf32_Word d_val; /* Integer value. */
|
||||
Elf32_Addr d_ptr; /* Address value. */
|
||||
} d_un;
|
||||
} Elf32_Dyn;
|
||||
|
||||
/*
|
||||
* Relocation entries.
|
||||
*/
|
||||
|
||||
/* Relocations that don't need an addend field. */
|
||||
typedef struct {
|
||||
Elf32_Addr off; /* Location to be relocated. */
|
||||
Elf32_Word info; /* Relocation type and symbol index. */
|
||||
} Elf32_Rel;
|
||||
|
||||
/* Relocations that need an addend field. */
|
||||
typedef struct {
|
||||
Elf32_Addr off; /* Location to be relocated. */
|
||||
Elf32_Word info; /* Relocation type and symbol index. */
|
||||
Elf32_Sword addend; /* Addend. */
|
||||
} Elf32_Rela;
|
||||
|
||||
/* Macros for accessing the fields of r_info. */
|
||||
#define ELF32_R_SYM(info) ((info) >> 8)
|
||||
#define ELF32_R_TYPE(info) ((unsigned char)(info))
|
||||
|
||||
/* Macro for constructing r_info from field values. */
|
||||
#define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type))
|
||||
|
||||
/*
|
||||
* Symbol table entries.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
Elf32_Word name; /* String table index of name. */
|
||||
Elf32_Addr value; /* Symbol value. */
|
||||
Elf32_Word size; /* Size of associated object. */
|
||||
unsigned char info; /* Type and binding information. */
|
||||
unsigned char other; /* Reserved (not used). */
|
||||
Elf32_Half shndx; /* Section index of symbol. */
|
||||
} Elf32_Sym;
|
||||
|
||||
/* Macros for accessing the fields of st_info. */
|
||||
#define ELF32_ST_BIND(info) ((info) >> 4)
|
||||
#define ELF32_ST_TYPE(info) ((info) & 0xf)
|
||||
|
||||
/* Macro for constructing st_info from field values. */
|
||||
#define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
|
||||
|
||||
/* Macro for accessing the fields of st_other. */
|
||||
#define ELF32_ST_VISIBILITY(oth) ((oth) & 0x3)
|
||||
|
||||
/*
|
||||
* ELF definitions common to all 64-bit architectures.
|
||||
*/
|
||||
|
||||
typedef uint64 Elf64_Addr;
|
||||
typedef uint16 Elf64_Half;
|
||||
typedef uint64 Elf64_Off;
|
||||
typedef int32 Elf64_Sword;
|
||||
typedef int64 Elf64_Sxword;
|
||||
typedef uint32 Elf64_Word;
|
||||
typedef uint64 Elf64_Xword;
|
||||
|
||||
/*
|
||||
* Types of dynamic symbol hash table bucket and chain elements.
|
||||
*
|
||||
* This is inconsistent among 64 bit architectures, so a machine dependent
|
||||
* typedef is required.
|
||||
*/
|
||||
|
||||
#ifdef __alpha__
|
||||
typedef Elf64_Off Elf64_Hashelt;
|
||||
#else
|
||||
typedef Elf64_Word Elf64_Hashelt;
|
||||
#endif
|
||||
|
||||
/* Non-standard class-dependent datatype used for abstraction. */
|
||||
typedef Elf64_Xword Elf64_Size;
|
||||
typedef Elf64_Sxword Elf64_Ssize;
|
||||
|
||||
/*
|
||||
* ELF header.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
unsigned char ident[EI_NIDENT]; /* File identification. */
|
||||
Elf64_Half type; /* File type. */
|
||||
Elf64_Half machine; /* Machine architecture. */
|
||||
Elf64_Word version; /* ELF format version. */
|
||||
Elf64_Addr entry; /* Entry point. */
|
||||
Elf64_Off phoff; /* Program header file offset. */
|
||||
Elf64_Off shoff; /* Section header file offset. */
|
||||
Elf64_Word flags; /* Architecture-specific flags. */
|
||||
Elf64_Half ehsize; /* Size of ELF header in bytes. */
|
||||
Elf64_Half phentsize; /* Size of program header entry. */
|
||||
Elf64_Half phnum; /* Number of program header entries. */
|
||||
Elf64_Half shentsize; /* Size of section header entry. */
|
||||
Elf64_Half shnum; /* Number of section header entries. */
|
||||
Elf64_Half shstrndx; /* Section name strings section. */
|
||||
} Elf64_Ehdr;
|
||||
|
||||
/*
|
||||
* Section header.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
Elf64_Word name; /* Section name (index into the
|
||||
section header string table). */
|
||||
Elf64_Word type; /* Section type. */
|
||||
Elf64_Xword flags; /* Section flags. */
|
||||
Elf64_Addr addr; /* Address in memory image. */
|
||||
Elf64_Off off; /* Offset in file. */
|
||||
Elf64_Xword size; /* Size in bytes. */
|
||||
Elf64_Word link; /* Index of a related section. */
|
||||
Elf64_Word info; /* Depends on section type. */
|
||||
Elf64_Xword addralign; /* Alignment in bytes. */
|
||||
Elf64_Xword entsize; /* Size of each entry in section. */
|
||||
} Elf64_Shdr;
|
||||
|
||||
/*
|
||||
* Program header.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
Elf64_Word type; /* Entry type. */
|
||||
Elf64_Word flags; /* Access permission flags. */
|
||||
Elf64_Off off; /* File offset of contents. */
|
||||
Elf64_Addr vaddr; /* Virtual address in memory image. */
|
||||
Elf64_Addr paddr; /* Physical address (not used). */
|
||||
Elf64_Xword filesz; /* Size of contents in file. */
|
||||
Elf64_Xword memsz; /* Size of contents in memory. */
|
||||
Elf64_Xword align; /* Alignment in memory and file. */
|
||||
} Elf64_Phdr;
|
||||
|
||||
/*
|
||||
* Dynamic structure. The ".dynamic" section contains an array of them.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
Elf64_Sxword d_tag; /* Entry type. */
|
||||
union {
|
||||
Elf64_Xword d_val; /* Integer value. */
|
||||
Elf64_Addr d_ptr; /* Address value. */
|
||||
} d_un;
|
||||
} Elf64_Dyn;
|
||||
|
||||
/*
|
||||
* Relocation entries.
|
||||
*/
|
||||
|
||||
/* Relocations that don't need an addend field. */
|
||||
typedef struct {
|
||||
Elf64_Addr off; /* Location to be relocated. */
|
||||
Elf64_Xword info; /* Relocation type and symbol index. */
|
||||
} Elf64_Rel;
|
||||
|
||||
/* Relocations that need an addend field. */
|
||||
typedef struct {
|
||||
Elf64_Addr off; /* Location to be relocated. */
|
||||
Elf64_Xword info; /* Relocation type and symbol index. */
|
||||
Elf64_Sxword addend; /* Addend. */
|
||||
} Elf64_Rela;
|
||||
|
||||
/* Macros for accessing the fields of r_info. */
|
||||
#define ELF64_R_SYM(info) ((info) >> 32)
|
||||
#define ELF64_R_TYPE(info) ((info) & 0xffffffffL)
|
||||
|
||||
/* Macro for constructing r_info from field values. */
|
||||
#define ELF64_R_INFO(sym, type) (((sym) << 32) + ((type) & 0xffffffffL))
|
||||
|
||||
/*
|
||||
* Symbol table entries.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
Elf64_Word name; /* String table index of name. */
|
||||
unsigned char info; /* Type and binding information. */
|
||||
unsigned char other; /* Reserved (not used). */
|
||||
Elf64_Half shndx; /* Section index of symbol. */
|
||||
Elf64_Addr value; /* Symbol value. */
|
||||
Elf64_Xword size; /* Size of associated object. */
|
||||
} Elf64_Sym;
|
||||
|
||||
/* Macros for accessing the fields of st_info. */
|
||||
#define ELF64_ST_BIND(info) ((info) >> 4)
|
||||
#define ELF64_ST_TYPE(info) ((info) & 0xf)
|
||||
|
||||
/* Macro for constructing st_info from field values. */
|
||||
#define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
|
||||
|
||||
/* Macro for accessing the fields of st_other. */
|
||||
#define ELF64_ST_VISIBILITY(oth) ((oth) & 0x3)
|
||||
|
||||
/*
|
||||
* Go linker interface
|
||||
*/
|
||||
|
||||
#define ELF64HDRSIZE 64
|
||||
#define ELF64PHDRSIZE 56
|
||||
#define ELF64SHDRSIZE 64
|
||||
#define ELF64RELSIZE 16
|
||||
#define ELF64RELASIZE 24
|
||||
#define ELF64SYMSIZE sizeof(Elf64_Sym)
|
||||
|
||||
#define ELF32HDRSIZE sizeof(Elf32_Ehdr)
|
||||
#define ELF32PHDRSIZE sizeof(Elf32_Phdr)
|
||||
#define ELF32SHDRSIZE sizeof(Elf32_Shdr)
|
||||
|
||||
void elfinit(void);
|
||||
Elf64_Ehdr *getElf64_Ehdr();
|
||||
Elf64_Shdr *newElf64_Shstrtab(vlong);
|
||||
Elf64_Shdr *newElf64_Shdr(vlong);
|
||||
Elf64_Phdr *newElf64_Phdr();
|
||||
uint32 elf64writehdr(void);
|
||||
uint32 elf64writephdrs(void);
|
||||
uint32 elf64writeshdrs(void);
|
||||
void elfwritedynent(Sym*, int, uint64);
|
||||
void elfwritedynentsym(Sym*, int, Sym*);
|
||||
void elfwritedynentsymsize(Sym*, int, Sym*);
|
||||
uint32 elf64_hash(uchar*);
|
||||
uint64 startelf(void);
|
||||
uint64 endelf(void);
|
||||
extern int nume64phdr;
|
||||
extern int nume64shdr;
|
||||
|
||||
/*
|
||||
* Total amount of ELF space to reserve at the start of the file
|
||||
* for Header, PHeaders, and SHeaders.
|
||||
* May waste some.
|
||||
*/
|
||||
#define ELFRESERVE 2048
|
||||
|
@ -1,292 +0,0 @@
|
||||
/*
|
||||
* Derived from:
|
||||
* $FreeBSD: src/sys/sys/elf32.h,v 1.8.14.1 2005/12/30 22:13:58 marcel Exp $
|
||||
* $FreeBSD: src/sys/sys/elf64.h,v 1.10.14.1 2005/12/30 22:13:58 marcel Exp $
|
||||
* $FreeBSD: src/sys/sys/elf_common.h,v 1.15.8.1 2005/12/30 22:13:58 marcel Exp $
|
||||
* $FreeBSD: src/sys/alpha/include/elf.h,v 1.14 2003/09/25 01:10:22 peter Exp $
|
||||
* $FreeBSD: src/sys/amd64/include/elf.h,v 1.18 2004/08/03 08:21:48 dfr Exp $
|
||||
* $FreeBSD: src/sys/arm/include/elf.h,v 1.5.2.1 2006/06/30 21:42:52 cognet Exp $
|
||||
* $FreeBSD: src/sys/i386/include/elf.h,v 1.16 2004/08/02 19:12:17 dfr Exp $
|
||||
* $FreeBSD: src/sys/powerpc/include/elf.h,v 1.7 2004/11/02 09:47:01 ssouhlal Exp $
|
||||
* $FreeBSD: src/sys/sparc64/include/elf.h,v 1.12 2003/09/25 01:10:26 peter Exp $
|
||||
*
|
||||
* Copyright (c) 1996-1998 John D. Polstra. All rights reserved.
|
||||
* Copyright (c) 2001 David E. O'Brien
|
||||
* Portions Copyright 2009 The Go Authors. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
typedef uint64 Elf64_Addr; /* Unsigned program address */
|
||||
typedef uint64 Elf64_Off; /* Unsigned file offset */
|
||||
typedef uint16 Elf64_Half; /* Unsigned medium integer */
|
||||
typedef uint32 Elf64_Word; /* Unsigned integer */
|
||||
typedef int32 Elf64_Sword; /* Signed integer */
|
||||
typedef uint64 Elf64_Xword; /* Unsigned long integer */
|
||||
typedef int64 Elf64_Sxword; /* Signed long integer */
|
||||
|
||||
typedef struct Elf64Hdr Elf64Hdr;
|
||||
typedef struct Elf64SHdr Elf64SHdr;
|
||||
typedef struct Elf64PHdr Elf64PHdr;
|
||||
|
||||
#define EI_NIDENT 16
|
||||
struct Elf64Hdr
|
||||
{
|
||||
uchar ident[EI_NIDENT]; /* ELF identification */
|
||||
Elf64_Half type; /* Object file type */
|
||||
Elf64_Half machine; /* Machine type */
|
||||
Elf64_Word version; /* Object file version */
|
||||
Elf64_Addr entry; /* Entry point address */
|
||||
Elf64_Off phoff; /* Program header offset */
|
||||
Elf64_Off shoff; /* Section header offset */
|
||||
Elf64_Word flags; /* Processor-specific flags */
|
||||
Elf64_Half ehsize; /* ELF header size */
|
||||
Elf64_Half phentsize; /* Size of program header entry */
|
||||
Elf64_Half phnum; /* Number of program header entries */
|
||||
Elf64_Half shentsize; /* Size of section header entry */
|
||||
Elf64_Half shnum; /* Number of section header entries */
|
||||
Elf64_Half shstrndx; /* Section name string table index */
|
||||
};
|
||||
#define ELF64HDRSIZE 64
|
||||
|
||||
/* E ident indexes */
|
||||
#define EI_MAG0 0 /* File identification */
|
||||
#define EI_MAG1 1
|
||||
#define EI_MAG2 2
|
||||
#define EI_MAG3 3
|
||||
#define EI_CLASS 4 /* File class */
|
||||
#define EI_DATA 5 /* Data encoding */
|
||||
#define EI_VERSION 6 /* File version */
|
||||
#define EI_OSABI 7 /* OS/ABI identification */
|
||||
#define EI_ABIVERSION 8 /* ABI version */
|
||||
#define EI_PAD 9 /*Start of padding bytes */
|
||||
|
||||
/* E types */
|
||||
#define ET_NONE 0 /* No file type */
|
||||
#define ET_REL 1 /* Relocatable object file */
|
||||
#define ET_EXEC 2 /* Executable file */
|
||||
#define ET_DYN 3 /* Shared object file */
|
||||
#define ET_CORE 4 /* Core file */
|
||||
#define ET_LOOS 0xFE00 /* Environment-specific use */
|
||||
#define ET_HIOS 0xFEFF
|
||||
#define ET_LOPROC 0xFF00 /* Processor-specific use */
|
||||
#define ET_HIPROC 0xFFFF
|
||||
|
||||
/* E classes */
|
||||
#define ELFCLASS32 1 /* 32-bit objects */
|
||||
#define ELFCLASS64 2 /* 64-bit objects */
|
||||
|
||||
/* E endians */
|
||||
#define ELFDATA2LSB 1 /* little-endian */
|
||||
#define ELFDATA2MSB 2 /* big-endian */
|
||||
|
||||
#define EV_CURRENT 1 /* current version of format */
|
||||
|
||||
struct Elf64PHdr
|
||||
{
|
||||
Elf64_Word type; /* Type of segment */
|
||||
Elf64_Word flags; /* Segment attributes */
|
||||
Elf64_Off off; /* Offset in file */
|
||||
Elf64_Addr vaddr; /* Virtual address in memory */
|
||||
Elf64_Addr paddr; /* Reserved */
|
||||
Elf64_Xword filesz; /* Size of segment in file */
|
||||
Elf64_Xword memsz; /* Size of segment in memory */
|
||||
Elf64_Xword align; /* Alignment of segment */
|
||||
};
|
||||
#define ELF64PHDRSIZE 56
|
||||
|
||||
/* P types */
|
||||
#define PT_NULL 0 /* Unused entry */
|
||||
#define PT_LOAD 1 /* Loadable segment */
|
||||
#define PT_DYNAMIC 2 /* Dynamic linking tables */
|
||||
#define PT_INTERP 3 /* Program interpreter path name */
|
||||
#define PT_NOTE 4 /* Note sections */
|
||||
#define PT_PHDR 6 /* Program header table */
|
||||
|
||||
/* P flags */
|
||||
#define PF_X 0x1 /* Execute permission */
|
||||
#define PF_W 0x2 /* Write permission */
|
||||
#define PF_R 0x4 /* Read permission */
|
||||
#define PF_MASKOS 0x00FF0000 /* reserved for environment-specific use */
|
||||
#define PF_MASKPROC 0xFF000000 /*reserved for processor-specific use */
|
||||
|
||||
struct Elf64SHdr
|
||||
{
|
||||
Elf64_Word name; /* Section name */
|
||||
Elf64_Word type; /* Section type */
|
||||
Elf64_Xword flags; /* Section attributes */
|
||||
Elf64_Addr addr; /* Virtual address in memory */
|
||||
Elf64_Off off; /* Offset in file */
|
||||
Elf64_Xword size; /* Size of section */
|
||||
Elf64_Word link; /* Link to other section */
|
||||
Elf64_Word info; /* Miscellaneous information */
|
||||
Elf64_Xword addralign; /* Address alignment boundary */
|
||||
Elf64_Xword entsize; /* Size of entries, if section has table */
|
||||
};
|
||||
#define ELF64SHDRSIZE 64
|
||||
|
||||
/* S types */
|
||||
#define SHT_NULL 0 /* Unused section header */
|
||||
#define SHT_PROGBITS 1 /* Information defined by the program */
|
||||
#define SHT_SYMTAB 2 /* Linker symbol table */
|
||||
#define SHT_STRTAB 3 /* String table */
|
||||
#define SHT_RELA 4 /* "Rela" type relocation entries */
|
||||
#define SHT_HASH 5 /* Symbol hash table */
|
||||
#define SHT_DYNAMIC 6 /* Dynamic linking tables */
|
||||
#define SHT_NOTE 7 /* Note information */
|
||||
#define SHT_NOBITS 8 /* Uninitialized space; does not occupy any space in the file */
|
||||
#define SHT_REL 9 /* "Rel" type relocation entries */
|
||||
#define SHT_SHLIB 10 /* Reserved */
|
||||
#define SHT_DYNSYM 11 /* A dynamic loader symbol table */
|
||||
#define SHT_LOOS 0x60000000 /* Environment-specific use */
|
||||
#define SHT_HIOS 0x6FFFFFFF
|
||||
#define SHT_LOPROC 0x70000000 /* Processor-specific use */
|
||||
#define SHT_HIPROC 0x7FFFFFFF
|
||||
|
||||
/* S flags */
|
||||
#define SHF_WRITE 0x1 /* Writable data */
|
||||
#define SHF_ALLOC 0x2 /* Allocated in memory image of program */
|
||||
#define SHF_EXECINSTR 0x4 /* Executable instructions */
|
||||
#define SHF_MASKOS 0x0F000000 /* Environment-specific use */
|
||||
#define SHF_MASKPROC 0xF0000000 /* Processor-specific use */
|
||||
|
||||
|
||||
typedef struct Elf64Dyn Elf64Dyn;
|
||||
struct Elf64Dyn
|
||||
{
|
||||
Elf64_Sxword d_tag;
|
||||
union {
|
||||
Elf64_Xword d_val;
|
||||
Elf64_Addr d_ptr;
|
||||
} d_un;
|
||||
};
|
||||
|
||||
/* Dyn table entries */
|
||||
#define DT_NULL 0 /* ignored: Marks the end of the dynamic array */
|
||||
#define DT_NEEDED 1 /* d_val: The string table offset of the name of
|
||||
a needed library. */
|
||||
#define DT_PLTRELSZ 2 /* d_val: Total size, in bytes, of the relocation
|
||||
entries associated with the procedure linkage table. */
|
||||
#define DT_PLTGOT 3 /* d_ptr: Contains an address associated with the linkage
|
||||
table. The specific meaning of this field is
|
||||
processor-dependent. */
|
||||
#define DT_HASH 4 /* d_ptr: Address of the symbol hash table. */
|
||||
#define DT_STRTAB 5 /* d_ptr: Address of the dynamic string table. */
|
||||
#define DT_SYMTAB 6 /* d_ptr: Address of the dynamic symbol table. */
|
||||
#define DT_RELA 7 /* d_ptr Address of a relocation table with Elf64_Rela
|
||||
entries. */
|
||||
#define DT_RELASZ 8 /* d_val: Total size, in bytes, of the DT_RELA relocation
|
||||
table. */
|
||||
#define DT_RELAENT 9 /* d_val: Size, in bytes, of each DT_RELA relocation
|
||||
entry. */
|
||||
#define DT_STRSZ 10 /* d_val: Total size, in bytes, of the string table. */
|
||||
#define DT_SYMENT 11 /* d_val: Size, in bytes, of each symbol table entry. */
|
||||
#define DT_INIT 12 /* d_ptr Address of the initialization function. */
|
||||
#define DT_FINI 13 /* d_ptr Address of the termination function. */
|
||||
#define DT_SONAME 14 /* d_val The string table offset of the name of this
|
||||
shared object. */
|
||||
#define DT_RPATH 15 /* d_val The string table offset of a shared library
|
||||
search path string. */
|
||||
#define DT_SYMBOLIC 16 /* ignored The presence of this dynamic table entry
|
||||
modifies the symbol resolution algorithm for references
|
||||
within the library. Symbols defined within the library
|
||||
are used to resolve references before the dynamic
|
||||
linker searches the usual search path. */
|
||||
#define DT_REL 17 /* d_ptr Address of a relocation table with Elf64_Rel
|
||||
entries. */
|
||||
#define DT_RELSZ 18 /* d_val Total size, in bytes, of the DT_REL relocation
|
||||
table. */
|
||||
#define DT_RELENT 19 /* d_val Size, in bytes, of each DT_REL relocation
|
||||
entry. */
|
||||
#define DT_PLTREL 20 /* d_val Type of relocation entry used for the procedure
|
||||
linkage table. The d_val member contains either DT_REL
|
||||
or DT_RELA. */
|
||||
#define DT_DEBUG 21 /* d_ptr Reserved for debugger use. */
|
||||
#define DT_TEXTREL 22 /* ignored The presence of this dynamic table entry
|
||||
signals that the relocation table contains relocations
|
||||
for a non-writable segment. */
|
||||
#define DT_JMPREL 23 /* d_ptr Address of the relocations associated with the
|
||||
procedure linkage table. */
|
||||
#define DT_BIND_NOW 24 /* ignored The presence of this dynamic table entry
|
||||
signals that the dynamic loader should process all
|
||||
relocations for this object before transferring
|
||||
control to the program. */
|
||||
#define DT_INIT_ARRAY 25 /* d_ptr Pointer to an array of pointers to initialization
|
||||
functions. */
|
||||
#define DT_FINI_ARRAY 26 /* d_ptr Pointer to an array of pointers to termination
|
||||
functions. */
|
||||
#define DT_INIT_ARRAYSZ 27 /* d_val Size, in bytes, of the array of initialization
|
||||
functions. */
|
||||
#define DT_FINI_ARRAYSZ 28 /* d_val Size, in bytes, of the array of termination
|
||||
functions. */
|
||||
#define DT_LOOS 0x60000000 /* Defines a range of dynamic table tags that are reserved
|
||||
for environment-specific use. */
|
||||
#define DT_HIOS 0x6FFFFFFF
|
||||
#define DT_LOPROC 0x70000000 /* Defines a range of dynamic table tags that are
|
||||
reserved for processor-specific use. */
|
||||
#define DT_HIPROC 0x7FFFFFFF
|
||||
|
||||
typedef struct Elf64_Rel Elf64_Rel;
|
||||
struct Elf64_Rel
|
||||
{
|
||||
Elf64_Addr r_offset; /* Address of reference */
|
||||
Elf64_Xword r_info; /* Symbol index and type of relocation */
|
||||
};
|
||||
#define ELF64RELSIZE 8
|
||||
|
||||
typedef struct Elf64_Rela Elf64_Rela;
|
||||
struct Elf64_Rela
|
||||
{
|
||||
Elf64_Addr r_offset; /* Address of reference */
|
||||
Elf64_Xword r_info; /* Symbol index and type of relocation */
|
||||
Elf64_Sxword r_addend; /* Constant part of expression */
|
||||
};
|
||||
#define ELF64RELASIZE 24
|
||||
|
||||
#define ELF64_R_SYM(i) ((i) >> 32)
|
||||
#define ELF64_R_TYPE(i) ((i) & 0xffffffffL)
|
||||
#define ELF64_R_INFO(s, t) (((s) << 32) + ((t) & 0xffffffffL))
|
||||
|
||||
void elf64init(void);
|
||||
Elf64Hdr *getElf64Hdr();
|
||||
Elf64SHdr *newElf64SHdr(char*);
|
||||
Elf64PHdr *newElf64PHdr();
|
||||
uint32 elf64writehdr(void);
|
||||
uint32 elf64writephdrs(void);
|
||||
uint32 elf64writeshdrs(void);
|
||||
uint32 elf64addstr(char*);
|
||||
void elf64writestrtable(void);
|
||||
void elf64writedynent(int, uint64);
|
||||
uint32 elf64_hash(uchar*);
|
||||
uint64 startelf(void);
|
||||
uint64 endelf(void);
|
||||
extern int nume64phdr;
|
||||
extern int nume64shdr;
|
||||
|
||||
#define STRTABSIZE 256
|
||||
/* Amount of space available for Header, PHeaders and SHeaders */
|
||||
#define ELF64FULLHDRSIZE 2048
|
||||
/* Space reserved after ELF64FULLHEADERSIZE for dynamic info */
|
||||
#define ELFDYNAMICSIZE 256
|
||||
/* Total amount of ELF space to reserve at the start of the file; may waste some */
|
||||
#define ELF64RESERVE 4096
|
@ -325,6 +325,8 @@ marktext(Prog *p)
|
||||
markdepth++;
|
||||
if(debug['v'] > 1)
|
||||
Bprint(&bso, "%d marktext %s\n", markdepth, p->from.sym->name);
|
||||
for(a=p->to.autom; a; a=a->link)
|
||||
mark(a->gotype);
|
||||
for(p=p->link; p != P; p=p->link) {
|
||||
if(p->as == ATEXT || p->as == ADATA || p->as == AGLOBL)
|
||||
break;
|
||||
|
Loading…
Reference in New Issue
Block a user