mirror of
https://github.com/golang/go
synced 2024-11-22 16:25:07 -07:00
more elf64 support: phdrs, constants
R=rsc DELTA=130 (68 added, 6 deleted, 56 changed) OCL=31798 CL=31798
This commit is contained in:
Rob Pike
parent
f95a42e6ba
commit
e86dcf1603
@ -127,6 +127,7 @@ asmb(void)
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vlong vl, va, fo, w, symo;
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int strtabsize;
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vlong symdatva = 0x99LL<<32;
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Elf64PHdr *ph;
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Elf64SHdr *sh;
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strtabsize = 0;
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@ -450,47 +451,49 @@ asmb(void)
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va = INITTEXT & ~((vlong)INITRND - 1);
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w = HEADR+textsize;
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elf64phdr(1, /* text - type = PT_LOAD */
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1L+4L, /* text - flags = PF_X+PF_R */
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0, /* file offset */
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va, /* vaddr */
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va, /* paddr */
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w, /* file size */
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w, /* memory size */
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INITRND); /* alignment */
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ph = newElf64PHdr();
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ph->type = PT_LOAD;
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ph->flags = PF_X+PF_R;
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ph->vaddr = va;
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ph->paddr = va;
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ph->filesz = w;
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ph->memsz = w;
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ph->align = INITRND;
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elf64phdr(ph);
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fo = rnd(fo+w, INITRND);
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va = rnd(va+w, INITRND);
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w = datsize;
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elf64phdr(1, /* data - type = PT_LOAD */
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2L+4L, /* data - flags = PF_W+PF_R */
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fo, /* file offset */
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va, /* vaddr */
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va, /* paddr */
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w, /* file size */
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w+bsssize, /* memory size */
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INITRND); /* alignment */
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ph = newElf64PHdr();
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ph->type = PT_LOAD;
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ph->flags = PF_W+PF_R;
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ph->off = fo;
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ph->vaddr = va;
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ph->paddr = va;
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ph->filesz = w;
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ph->memsz = w+bsssize;
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ph->align = INITRND;
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elf64phdr(ph);
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if(!debug['s']) {
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elf64phdr(1, /* data - type = PT_LOAD */
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2L+4L, /* data - flags = PF_W+PF_R */
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symo, /* file offset */
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symdatva, /* vaddr */
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symdatva, /* paddr */
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8+symsize+lcsize, /* file size */
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8+symsize+lcsize, /* memory size */
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INITRND); /* alignment */
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ph = newElf64PHdr();
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ph->type = PT_LOAD;
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ph->flags = PF_W+PF_R;
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ph->off = symo;
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ph->vaddr = symdatva;
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ph->paddr = symdatva;
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ph->filesz = 8+symsize+lcsize;
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ph->memsz = 8+symsize+lcsize;
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ph->align = INITRND;
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elf64phdr(ph);
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}
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elf64phdr(0x6474e551, /* gok - type = gok */
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1L+2L+4L, /* gok - flags = PF_X+PF_W+PF_R */
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0, /* file offset */
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0, /* vaddr */
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0, /* paddr */
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0, /* file size */
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0, /* memory size */
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8); /* alignment */
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ph = newElf64PHdr();
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ph->type = 0x6474e551; /* gok */
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ph->flags = PF_X+PF_W+PF_R;
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ph->align = 8;
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elf64phdr(ph);
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sh = newElf64SHdr();
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elf64shdr(nil, sh);
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@ -501,8 +504,8 @@ asmb(void)
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w = textsize;
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sh = newElf64SHdr();
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sh->type = 1;
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sh->flags = 6;
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sh->type = SHT_PROGBITS;
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sh->flags = SHF_ALLOC+SHF_EXECINSTR;
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sh->addr = va;
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sh->off = fo;
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sh->size = w;
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@ -514,8 +517,8 @@ asmb(void)
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w = datsize;
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sh = newElf64SHdr();
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sh->type = 1;
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sh->flags = 3;
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sh->type = SHT_PROGBITS;
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sh->flags = SHF_WRITE+SHF_ALLOC;
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sh->addr = va;
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sh->off = fo;
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sh->size = w;
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@ -527,8 +530,8 @@ asmb(void)
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w = bsssize;
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sh = newElf64SHdr();
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sh->type = 8;
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sh->flags = 3;
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sh->type = SHT_NOBITS;
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sh->flags = SHF_WRITE+SHF_ALLOC;
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sh->addr = va;
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sh->off = fo;
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sh->size = w;
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@ -538,7 +541,7 @@ asmb(void)
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w = strtabsize;
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sh = newElf64SHdr();
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sh->type = 3;
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sh->type = SHT_STRTAB;
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sh->off = fo;
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sh->size = w;
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sh->addralign = 1;
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@ -551,7 +554,7 @@ asmb(void)
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w = symsize;
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sh = newElf64SHdr();
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sh->type = 1; /* type 1 = SHT_PROGBITS */
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sh->type = SHT_PROGBITS;
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sh->off = fo;
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sh->size = w;
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sh->addralign = 1;
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@ -562,7 +565,7 @@ asmb(void)
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w = lcsize;
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sh = newElf64SHdr();
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sh->type = 1; /* type 1 = SHT_PROGBITS */
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sh->type = SHT_PROGBITS;
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sh->off = fo;
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sh->size = w;
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sh->addralign = 1;
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@ -7,19 +7,16 @@
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#include "../ld/elf64.h"
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void
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elf64phdr(int type, int flags, vlong foff,
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vlong vaddr, vlong paddr,
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vlong filesize, vlong memsize, vlong align)
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elf64phdr(Elf64PHdr *e)
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{
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lputl(type); /* type */
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lputl(flags); /* flags */
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vputl(foff); /* file offset */
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vputl(vaddr); /* vaddr */
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vputl(paddr); /* paddr */
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vputl(filesize); /* file size */
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vputl(memsize); /* memory size */
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vputl(align); /* alignment */
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lputl(e->type);
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lputl(e->flags);
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vputl(e->off);
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vputl(e->vaddr);
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vputl(e->paddr);
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vputl(e->filesz);
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vputl(e->memsz);
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vputl(e->align);
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}
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void
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@ -106,3 +103,14 @@ newElf64SHdr()
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return e;
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}
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Elf64PHdr*
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newElf64PHdr()
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{
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Elf64PHdr *e;
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e = malloc(sizeof *e);
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memset(e, 0, sizeof *e);
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return e;
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}
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@ -47,6 +47,7 @@ typedef int64 Elf64_Sxword; /* Signed long integer */
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typedef struct Elf64Hdr Elf64Hdr;
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typedef struct Elf64SHdr Elf64SHdr;
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typedef struct Elf64PHdr Elf64PHdr;
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struct Elf64Hdr
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{
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@ -66,6 +67,32 @@ struct Elf64Hdr
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Elf64_Half shstrndx; /* Section name string table index */
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};
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struct Elf64PHdr
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{
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Elf64_Word type; /* Type of segment */
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Elf64_Word flags; /* Segment attributes */
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Elf64_Off off; /* Offset in file */
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Elf64_Addr vaddr; /* Virtual address in memory */
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Elf64_Addr paddr; /* Reserved */
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Elf64_Xword filesz; /* Size of segment in file */
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Elf64_Xword memsz; /* Size of segment in memory */
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Elf64_Xword align; /* Alignment of segment */
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};
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/* P types */
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#define PT_NULL 0 /* Unused entry */
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#define PT_LOAD 1 /* Loadable segment */
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#define PT_DYNAMIC 2 /* Dynamic linking tables */
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#define PT_INTERP 3 /* Program interpreter path name */
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#define PT_NOTE 4 /* Note sections */
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/* P flags */
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#define PF_X 0x1 /* Execute permission */
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#define PF_W 0x2 /* Write permission */
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#define PF_R 0x4 /* Read permission */
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#define PF_MASKOS 0x00FF0000 /* reserved for environment-specific use */
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#define PF_MASKPROC 0xFF000000 /*reserved for processor-specific use */
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struct Elf64SHdr
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{
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Elf64_Word name; /* Section name */
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@ -80,10 +107,34 @@ struct Elf64SHdr
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Elf64_Xword entsize; /* Size of entries, if section has table */
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};
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/* S types */
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#define SHT_NULL 0 /* Unused section header */
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#define SHT_PROGBITS 1 /* Information defined by the program */
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#define SHT_SYMTAB 2 /* Linker symbol table */
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#define SHT_STRTAB 3 /* String table */
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#define SHT_RELA 4 /* "Rela" type relocation entries */
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#define SHT_HASH 5 /* Symbol hash table */
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#define SHT_DYNAMIC 6 /* Dynamic linking tables */
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#define SHT_NOTE 7 /* Note information */
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#define SHT_NOBITS 8 /* Uninitialized space; does not occupy any space in the file */
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#define SHT_REL 9 /* "Rel" type relocation entries */
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#define SHT_SHLIB 10 /* Reserved */
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#define SHT_DYNSYM 11 /* A dynamic loader symbol table */
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#define SHT_LOOS 0x60000000 /* Environment-specific use */
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#define SHT_HIOS 0x6FFFFFFF
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#define SHT_LOPROC 0x70000000 /* Processor-specific use */
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#define SHT_HIPROC 0x7FFFFFFF
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/* S flags */
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#define SHF_WRITE 0x1 /* Writable data */
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#define SHF_ALLOC 0x2 /* Allocated in memory image of program */
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#define SHF_EXECINSTR 0x4 /* Executable instructions */
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#define SHF_MASKOS 0x0F000000 /* Environment-specific use */
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#define SHF_MASKPROC 0xF0000000 /* Processor-specific use */
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Elf64SHdr *newElf64SHdr();
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Elf64PHdr *newElf64PHdr();
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uint32 elf64headr(void);
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void elf64phdr(int type, int flags, vlong foff,
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vlong vaddr, vlong paddr,
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vlong filesize, vlong memsize, vlong align);
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void elf64phdr(Elf64PHdr*);
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void elf64shdr(char*, Elf64SHdr*);
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int elf64strtable(void);
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