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synced 2024-10-01 23:37:14 +00:00
take care of a few more magic numbers
R=rsc DELTA=51 (41 added, 0 deleted, 10 changed) OCL=31815 CL=31818
This commit is contained in:
Rob Pike
parent
51c0a84175
commit
94d89ede1c
@ -126,8 +126,10 @@ asmb(void)
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uchar *op1;
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vlong vl, va, fo, w, symo;
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vlong symdatva = 0x99LL<<32;
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int strtabindex;
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Elf64PHdr *ph;
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Elf64SHdr *sh;
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char eident[EI_NIDENT];
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if(debug['v'])
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Bprint(&bso, "%5.2f asmb\n", cputime());
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@ -501,6 +503,7 @@ asmb(void)
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w = STRTABSIZE;
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strtabindex = nume64shdr;
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sh = newElf64SHdr(".shstrtab");
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sh->type = SHT_STRTAB;
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sh->off = fo;
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@ -531,15 +534,19 @@ asmb(void)
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sh->entsize = 24;
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// write out the main header */
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strnput("\177ELF", 4); /* e_ident */
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cput(2); /* class = 64 bit */
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cput(1); /* data = LSB */
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cput(1); /* version = CURRENT */
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strnput("", 9);
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memset(eident, 0, sizeof eident);
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eident[EI_MAG0] = '\177';
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eident[EI_MAG1] = 'E';
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eident[EI_MAG2] = 'L';
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eident[EI_MAG3] = 'F';
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eident[EI_CLASS] = ELFCLASS64;
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eident[EI_DATA] = ELFDATA2LSB;
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eident[EI_VERSION] = EV_CURRENT;
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strnput(eident, EI_NIDENT);
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wputl(2); /* type = EXEC */
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wputl(ET_EXEC); /* type = EXEC */
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wputl(62); /* machine = AMD64 */
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lputl(1L); /* version = CURRENT */
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lputl(EV_CURRENT); /* version = CURRENT */
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vputl(entryvalue()); /* entry vaddr */
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vputl(64L); /* offset to first phdr */
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vputl(64L+56*nume64phdr); /* offset to first shdr */
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@ -549,7 +556,7 @@ asmb(void)
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wputl(nume64phdr); /* # of Phdrs */
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wputl(64); /* Shdr size */
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wputl(nume64shdr); /* # of Shdrs */
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wputl(4); /* Shdr with strings */
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wputl(strtabindex); /* Shdr with strings */
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elf64writephdrs();
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elf64writeshdrs();
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@ -49,9 +49,10 @@ typedef struct Elf64Hdr Elf64Hdr;
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typedef struct Elf64SHdr Elf64SHdr;
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typedef struct Elf64PHdr Elf64PHdr;
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#define EI_NIDENT 16
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struct Elf64Hdr
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{
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uchar ident[16]; /* ELF identification */
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uchar ident[EI_NIDENT]; /* ELF identification */
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Elf64_Half type; /* Object file type */
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Elf64_Half machine; /* Machine type */
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Elf64_Word version; /* Object file version */
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@ -67,16 +68,49 @@ struct Elf64Hdr
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Elf64_Half shstrndx; /* Section name string table index */
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};
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/* E ident indexes */
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#define EI_MAG0 0 /* File identification */
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#define EI_MAG1 1
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#define EI_MAG2 2
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#define EI_MAG3 3
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#define EI_CLASS 4 /* File class */
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#define EI_DATA 5 /* Data encoding */
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#define EI_VERSION 6 /* File version */
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#define EI_OSABI 7 /* OS/ABI identification */
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#define EI_ABIVERSION 8 /* ABI version */
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#define EI_PAD 9 /*Start of padding bytes */
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/* E types */
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#define ET_NONE 0 /* No file type */
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#define ET_REL 1 /* Relocatable object file */
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#define ET_EXEC 2 /* Executable file */
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#define ET_DYN 3 /* Shared object file */
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#define ET_CORE 4 /* Core file */
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#define ET_LOOS 0xFE00 /* Environment-specific use */
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#define ET_HIOS 0xFEFF
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#define ET_LOPROC 0xFF00 /* Processor-specific use */
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#define ET_HIPROC 0xFFFF
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/* E classes */
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#define ELFCLASS32 1 /* 32-bit objects */
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#define ELFCLASS64 2 /* 64-bit objects */
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/* E endians */
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#define ELFDATA2LSB 1 /* little-endian */
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#define ELFDATA2MSB 2 /* big-endian */
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#define EV_CURRENT 1 /* current version of format */
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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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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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@ -116,18 +150,18 @@ struct Elf64SHdr
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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_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_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_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_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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