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elf2hunk.c
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elf2hunk.c
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/*
Copyright � 1995-2017, The AROS Development Team. All rights reserved.
Modified 2018-2021, Bartman/Abyss
Modified 2024, JOB (OS3.1 bug limiting hunk reloc count to 65537)
$Id$
*/
#define PROTOTYPES
#define HAVE_STDARG_H
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#ifndef _MSC_VER
#include <unistd.h>
#include <dirent.h>
#endif
#include <fcntl.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
// Linux does not have O_BINARY - petmac
#ifndef O_BINARY
#define O_BINARY 0
#endif
#if OPTION_LIMIT_RELOC_SIZE
#define MAX_RELOC_SIZE 65535
#endif
#define F_VERBOSE (1 << 0)
#define F_NOCONVERT (1 << 1)
#define F_PCREL (1 << 2)
#define F_BINARY (1 << 3)
#define F_STRIP (1 << 4)
#if defined(_MSC_VER) || defined(WIN32)
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")
#define mkdir(path, mode) mkdir(path)
#else
#include <arpa/inet.h>
typedef uint32_t ULONG;
typedef int BOOL;
#endif
typedef uint8_t UBYTE;
typedef uint16_t UWORD;
typedef uint32_t IPTR;
typedef int32_t SIPTR;
typedef char * STRPTR;
#include "demangle.h"
#if !defined(FALSE)&&!defined(TRUE)
#define FALSE 0
#define TRUE (!FALSE)
#endif
/* Memory allocation flags */
#define MEMF_ANY 0L
#define MEMF_PUBLIC (1L<<0)
#define MEMF_CHIP (1L<<1)
#define MEMF_FAST (1L<<2)
#define MEMF_EXECUTABLE (1L<<4) /* AmigaOS v4 compatible */
#define MEMF_LOCAL (1L<<8)
#define MEMF_24BITDMA (1L<<9)
#define MEMF_KICK (1L<<10)
#define MEMF_31BIT (1L<<12) /* Low address space (<2GB). Effective only on 64 bit machines. */
#define MEMF_CLEAR (1L<<16) /* Explicitly clear memory after allocation */
#define MEMF_LARGEST (1L<<17)
#define MEMF_REVERSE (1L<<18)
#define MEMF_TOTAL (1L<<19)
#define MEMF_HWALIGNED (1L<<20) /* For AllocMem() - align address and size to physical page boundary */
#define MEMF_SEM_PROTECTED (1L<<20) /* For CreatePool() - add semaphore protection to the pool */
#define MEMF_NO_EXPUNGE (1L<<31)
#define HUNKF_ADVISORY (1L<<29)
#define HUNKF_CHIP (1L<<30)
#define HUNKF_FAST (1L<<31)
#define HUNKF_MEMFLAGS (HUNKF_CHIP | HUNKF_FAST)
#define HUNK_CODE 1001
#define HUNK_DATA 1002
#define HUNK_BSS 1003
#define HUNK_RELOC32 1004
#define HUNK_SYMBOL 1008
#define HUNK_END 1010
#define HUNK_HEADER 1011
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SYMTAB_SHNDX 18
#define ET_REL 1
#define ET_EXEC 2
#define ET_DYN 3
#define EM_386 3
#define EM_68K 4
#define EM_PPC 20
#define EM_ARM 40
#define EM_X86_64 62 /* AMD x86-64 */
#define R_386_NONE 0
#define R_386_32 1
#define R_386_PC32 2
/* AMD x86-64 relocations. */
#define R_X86_64_NONE 0 /* No reloc */
#define R_X86_64_64 1 /* Direct 64 bit */
#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
#define R_X86_64_32 10
#define R_X86_64_32S 11
#define R_68k_NONE 0
#define R_68K_32 1
#define R_68K_PC32 4
#define R_68K_PC16 5
#define R_PPC_NONE 0
#define R_PPC_ADDR32 1
#define R_PPC_ADDR16_LO 4
#define R_PPC_ADDR16_HA 6
#define R_PPC_REL24 10
#define R_PPC_REL32 26
#define R_PPC_REL16_LO 250
#define R_PPC_REL16_HA 252
#define R_ARM_NONE 0
#define R_ARM_PC24 1
#define R_ARM_ABS32 2
#define R_ARM_CALL 28
#define R_ARM_JUMP24 29
#define R_ARM_V4BX 40
#define R_ARM_PREL31 42
#define R_ARM_MOVW_ABS_NC 43
#define R_ARM_MOVT_ABS 44
#define STT_NOTYPE 0
#define STT_OBJECT 1
#define STT_FUNC 2
#define STT_SECTION 3
#define STT_FILE 4
#define STT_LOPROC 13
#define STT_HIPROC 15
#define SHN_UNDEF 0
#define SHN_LORESERVE 0xff00
#define SHN_ABS 0xfff1
#define SHN_COMMON 0xfff2
#define SHN_XINDEX 0xffff
#define SHN_HIRESERVE 0xffff
#define SHF_WRITE (1 << 0)
#define SHF_ALLOC (1 << 1)
#define SHF_EXECINSTR (1 << 2)
#define ELF_ST_TYPE(i) ((i) & 0x0F)
#define EI_VERSION 6
#define EV_CURRENT 1
#define EI_DATA 5
#define ELFDATA2LSB 1
#define ELFDATA2MSB 2
#define EI_CLASS 4
#define ELFCLASS32 1
#define ELFCLASS64 2 /* 64-bit objects */
#define EI_OSABI 7
#define EI_ABIVERSION 8
#define ELFOSABI_AROS 15
#define PF_X (1 << 0)
#pragma pack(push)
struct elfheader
{
UBYTE ident[16];
UWORD type;
UWORD machine;
ULONG version;
IPTR entry;
IPTR phoff;
IPTR shoff;
ULONG flags;
UWORD ehsize;
UWORD phentsize;
UWORD phnum;
UWORD shentsize;
UWORD shnum;
UWORD shstrndx;
};
struct sheader
{
ULONG name;
ULONG type;
IPTR flags;
IPTR addr;
IPTR offset;
IPTR size;
ULONG link;
ULONG info;
IPTR addralign;
IPTR entsize;
};
#define PT_LOAD 1
struct pheader
{
ULONG type;
ULONG offset;
IPTR vaddr;
IPTR paddr;
ULONG filesz;
ULONG memsz;
ULONG flags;
ULONG align;
};
struct symbol
{
ULONG name; /* Offset of the name string in the string table */
IPTR value; /* Varies; eg. the offset of the symbol in its hunk */
IPTR size; /* How much memory does the symbol occupy */
UBYTE info; /* What kind of symbol is this ? (global, variable, etc) */
UBYTE other; /* undefined */
UWORD shindex; /* In which section is the symbol defined ? */
};
#pragma pack(pop)
#define ELF_R_SYM(val) ((val) >> 8)
#define ELF_R_TYPE(val) ((val) & 0xff)
#define ELF_R_INFO(sym, type) (((sym) << 8) + ((type) & 0xff))
struct relo
{
IPTR offset; /* Address of the relocation relative to the section it refers to */
IPTR info; /* Type of the relocation */
SIPTR addend; /* Constant addend used to compute value */
};
/* Note: the conversion below is not in line with ELF specification and is fixed in GNU binutils since 2008
* See: https://sourceware.org/bugzilla/show_bug.cgi?id=5900
*/
/* convert section header number to array index */
/*#define SHINDEX(n) \
((n) < SHN_LORESERVE ? (n) : ((n) <= SHN_HIRESERVE ? 0 : (n) - (SHN_HIRESERVE + 1 - SHN_LORESERVE)))*/
/* convert section header array index to section number */
/*#define SHNUM(i) \
((i) < SHN_LORESERVE ? (i) : (i) + (SHN_HIRESERVE + 1 - SHN_LORESERVE))*/
/* m68k Machine's native values */
#define AROS_ELF_CLASS ELFCLASS32
#define AROS_ELF_DATA ELFDATA2MSB
#define AROS_ELF_MACHINE EM_68K
#define AROS_ELF_REL SHT_RELA
#if defined(HAVE_STDARG_H) && defined(__STDC__) && __STDC__
# include <stdarg.h>
# define VA_START(args, lastarg) va_start(args, lastarg)
#else
# include <varargs.h>
# define VA_START(args, lastarg) va_start(args)
#endif
#ifdef PROTOTYPES
# define PARAMS(x) x
#else
# define PARAMS(x) ()
#endif /* PROTOTYPES */
static void set_error(int err)
{
errno = err;
}
#if (defined(DEBUG) && DEBUG) || defined(_DEBUG)
#define D(x) x
#define DB2(x) x
#else
#define D(x)
#define DB2(x)
#endif
#ifdef _MSC_VER
#define bug(fmt,...) fprintf(stderr, fmt ,__VA_ARGS__ )
#else
#define bug(fmt,args...) fprintf(stderr, fmt ,##args )
#endif
static int must_swap = -1;
static void eh_fixup(struct elfheader *eh)
{
/* Endian swaps */
if(eh->type >= 256) {
must_swap = 1;
eh->type = ntohs(eh->type);
eh->machine = ntohs(eh->machine);
eh->version = ntohl(eh->version);
eh->entry = ntohl(eh->entry);
eh->phoff = ntohl(eh->phoff);
eh->shoff = ntohl(eh->shoff);
eh->flags = ntohl(eh->flags);
eh->ehsize = ntohs(eh->ehsize);
eh->phentsize = ntohs(eh->phentsize);
eh->phnum = ntohs(eh->phnum);
eh->shentsize = ntohs(eh->shentsize);
eh->shnum = ntohs(eh->shnum);
eh->shstrndx = ntohs(eh->shstrndx);
} else {
must_swap = 0;
}
}
static void sh_fixup(struct sheader *sh, int n)
{
if(must_swap == 0)
return;
for(; n > 0; n--, sh++) {
sh->name = ntohl(sh->name);
sh->type = ntohl(sh->type);
sh->flags = ntohl(sh->flags);
sh->addr = ntohl(sh->addr);
sh->offset = ntohl(sh->offset);
sh->size = ntohl(sh->size);
sh->link = ntohl(sh->link);
sh->info = ntohl(sh->info);
sh->addralign = ntohl(sh->addralign);
sh->entsize = ntohl(sh->entsize);
}
}
static void rel_fixup(struct relo *rel)
{
if(must_swap == 0)
return;
rel->offset = ntohl(rel->offset);
rel->info = ntohl(rel->info);
rel->addend = ntohl(rel->addend);
}
void sym_fixup(struct symbol *sym)
{
if(must_swap == 0)
return;
sym->name = ntohl(sym->name);
sym->value = ntohl(sym->value);
sym->size = ntohl(sym->size);
sym->shindex = ntohs(sym->shindex);
}
static void *load_block(int file, ULONG offset, ULONG size)
{
ULONG lsize = (size + sizeof(ULONG) - 1) / sizeof(ULONG);
D(bug("[ELF2HUNK] Load Block (size=%d)\n", (int)size));
void *block = malloc(lsize * sizeof(ULONG));
if(block) {
lseek(file, offset, SEEK_SET);
if(read(file, block, size) == size) {
return block;
}
free(block);
set_error(EIO);
} else
set_error(ENOMEM);
return NULL;
}
static ULONG read_shnum(int file, struct elfheader *eh)
{
ULONG shnum = eh->shnum;
/* the ELF header only uses 16 bits to store the count of section headers,
* so it can't handle more than 65535 headers. if the count is 0, and an
* offset is defined, then the real count can be found in the first
* section header (which always exists).
*
* similarly, if the string table index is SHN_XINDEX, then the actual
* index is found in the first section header also.
*
* see the System V ABI 2001-04-24 draft for more details.
*/
if(eh->shnum == 0)
{
struct sheader sh;
if(eh->shoff == 0) {
set_error(ENOEXEC);
return 0;
}
lseek(file, eh->shoff, SEEK_SET);
if(read(file, &sh, sizeof(sh)) != sizeof(sh))
return 0;
sh_fixup(&sh, 1);
/* wider section header count is in the size field */
shnum = sh.size;
/* sanity, if they're still invalid then this isn't elf */
if(shnum == 0)
set_error(ENOEXEC);
}
return shnum;
}
static int load_header(int file, struct elfheader *eh)
{
lseek(file, 0, SEEK_SET);
if(read(file, eh, sizeof(struct elfheader)) != sizeof(struct elfheader)) {
D(bug("[ELF2HUNK] Can't read the %d byte ELF header\n", (int)sizeof(struct elfheader)));
return 0;
}
eh_fixup(eh);
if(eh->ident[0] != 0x7f || eh->ident[1] != 'E' ||
eh->ident[2] != 'L' || eh->ident[3] != 'F') {
D(bug("[ELF2HUNK] Not an ELF object\n"));
return 0;
}
D(bug("[ELF2HUNK] ELF object\n"));
/* WANT_CLASS should be defined for your target */
if(eh->ident[EI_CLASS] != AROS_ELF_CLASS ||
eh->ident[EI_VERSION] != EV_CURRENT ||
(eh->type != ET_REL && eh->type != ET_EXEC && eh->type != ET_DYN) ||
eh->ident[EI_DATA] != AROS_ELF_DATA ||
eh->machine != AROS_ELF_MACHINE)
{
D(bug("[ELF2HUNK] Object is of wrong type\n"));
D(bug("[ELF2HUNK] EI_CLASS is %d - should be %d\n", eh->ident[EI_CLASS], AROS_ELF_CLASS));
D(bug("[ELF2HUNK] EI_VERSION is %d - should be %d\n", eh->ident[EI_VERSION], EV_CURRENT));
D(bug("[ELF2HUNK] type is %d - should be %d or %d or %d\n", eh->type, ET_REL, ET_EXEC, ET_DYN));
D(bug("[ELF2HUNK] EI_DATA is %d - should be %d\n", eh->ident[EI_DATA], AROS_ELF_DATA));
D(bug("[ELF2HUNK] machine is %d - should be %d\n", eh->machine, AROS_ELF_MACHINE));
set_error(ENOEXEC);
return 0;
}
return 1;
}
struct hunkheader {
ULONG type;
ULONG memflags; /* Memory flags */
ULONG size; /* Size in ULONGs */
void *data;
ULONG relocs;
int hunk; /* Allocatable hunk ID */
struct hunkreloc {
ULONG shid; /* ELF hunk base to add to... */
ULONG offset; /* offset in this hunk. */
const char *symbol;
} *reloc;
};
static int relocate
(
struct elfheader *eh,
struct sheader *sh,
ULONG shrel_idx,
int symtab_shndx,
struct relo *rel,
struct hunkheader **hh
)
{
struct sheader *shrel = &sh[shrel_idx];
struct sheader *shsymtab = &sh[shrel->link];
struct sheader *toreloc = &sh[shrel->info];
struct symbol *symtab = (struct symbol *)hh[shrel->link]->data;
struct hunkheader *h = hh[shrel->info];
/*
* Ignore relocs if the target section has no allocation. that can happen
* eg. with a .debug PROGBITS and a .rel.debug section
*/
D(bug("[ELF2HUNK] relocate(): sh[%d].flags = 0x%x, .size = %d\n", (int)(shrel->info), (int)toreloc->flags, (int)toreloc->size));
if(!(toreloc->flags & SHF_ALLOC))
return 1;
ULONG numrel = shrel->size / shrel->entsize;
ULONG i;
ULONG hrels;
hrels = h->relocs;
h->relocs += numrel;
h->reloc = realloc(h->reloc, h->relocs * sizeof(struct hunkreloc));
struct hunkreloc *hrel = &h->reloc[hrels];
for(i = 0; i < numrel; i++, rel++)
{
struct symbol sym;
ULONG offset;
ULONG shindex;
ULONG shid = 0;
ULONG value = 0;
const char *symname;
rel_fixup(rel);
#ifdef __arm__
/*
* R_ARM_V4BX are actually special marks for the linker.
* They even never have a target (shindex == SHN_UNDEF),
* so we simply ignore them before doing any checks.
*/
if(ELF_R_TYPE(rel->info) == R_ARM_V4BX)
continue;
#endif
sym = symtab[ELF_R_SYM(rel->info)];
sym_fixup(&sym);
offset = rel->offset;
symname = (const char *)((uintptr_t)hh[shsymtab->link]->data + sym.name);
if(sym.shindex != SHN_XINDEX)
shindex = sym.shindex;
else {
if(symtab_shndx < 0) {
bug("[ELF2HUNK] got symbol with shndx 0xfff, but there's no symtab shndx table\n");
set_error(EINVAL);
return 0;
}
shindex = ntohl(((ULONG *)hh[symtab_shndx]->data)[ELF_R_SYM(rel->info)]);
}
if(eh->type == ET_EXEC) {
D(bug("sh[%d].base=%x offset %x -= %x => %x\n", shrel->info, sh[shrel->info].addr, offset, sh[shrel->info].addr, offset - sh[shrel->info].addr));
offset -= sh[shrel->info].addr;
}
D(bug("[ELF2HUNK] Processing section %d symbol '%s' value %x add %x\n", (int)shindex, symname, sym.value, rel->addend));
switch(shindex)
{
case SHN_UNDEF:
if(ELF_R_TYPE(rel->info) != 0) {
bug("[ELF2HUNK] SHN_UNDEF symbol '%s', type %d unsupported\n", symname, (int)ELF_R_TYPE(rel->info));
set_error(EINVAL);
return 0;
}
break;
case SHN_COMMON:
bug("[ELF2HUNK] SHN_COMMON symbol '%s' unsupported\n", symname);
set_error(EINVAL);
return 0;
case SHN_ABS:
shid = ~0; value = sym.value;
break;
default:
shid = shindex;
value = sym.value;
break;
}
switch(ELF_R_TYPE(rel->info))
{
case R_68K_32:
value += rel->addend;
break;
case R_68K_PC32:
value += rel->addend - offset;
break;
case R_68K_PC16:
bug("[ELF2HUNK] Unsupported relocation type R_68K_PC16,\n");
bug("[ELF2HUNK] for symbol '%s'\n", symname);
set_error(EINVAL);
return 0;
break;
case R_68k_NONE:
shid = ~0;
break;
default:
bug("[ELF2HUNK] Unrecognized relocation type %d %d,\n", (int)i, (int)ELF_R_TYPE(rel->info));
bug("[ELF2HUNK] for symbol '%s'\n", symname);
set_error(EINVAL);
return 0;
}
// skip relocations to empty sections
if(shid != ~0 && !hh[shid]) {
*(ULONG*)((uintptr_t)h->data + offset) = ~0;
h->relocs--;
continue;
}
if(eh->type == ET_EXEC) {
value -= sh[shindex].addr;
D(bug("ET_EXEC %x -= %x => %x\n", ntohl(*(ULONG *)((uintptr_t)h->data + offset)), sh[shindex].addr, value));
*(ULONG *)((uintptr_t)h->data + offset) = 0;
}
D(bug("[ELF2HUNK] shid %d, offset 0x%x: base 0x%x\n", (int)shid, (int)offset, (int)value));
*(ULONG *)((uintptr_t)h->data + offset) = htonl(value + ntohl(*(ULONG *)((uintptr_t)h->data + offset)));
// SHN_ABS don't need relocation, we already modified it inplace
if(shid == ~0) {
h->relocs--;
continue;
}
hrel->shid = shid;
hrel->offset = offset;
hrel->symbol = symname;
hrel++;
}
return 1;
}
int reloc_cmp(const void *a, const void *b)
{
const struct hunkreloc *ha = a, *hb = b;
if(ha->shid != hb->shid)
return hb->shid - ha->shid;
return hb->offset - ha->offset;
}
static int wlong(int fd, ULONG val)
{
val = htonl(val);
return write(fd, &val, sizeof(val));
}
int sym_dump(int hunk_fd, struct elfheader* eh, struct sheader *sh, struct hunkheader **hh, int shid, int symtabndx, int flags)
{
if(flags & F_STRIP)
return 1;
int i, err, syms;
struct symbol *sym = hh[symtabndx]->data;
struct sheader *symtab = &sh[symtabndx];
syms = symtab->size / sizeof(struct symbol);
if(syms == 0)
return 1;
wlong(hunk_fd, HUNK_SYMBOL);
// wlong(hunk_fd, syms);
/* Dump symbols for this hunk */
for(i = 0; i < syms; i++) {
struct symbol s;
const char *name;
int lsize;
s = sym[i];
sym_fixup(&s);
if(s.shindex != shid)
continue;
if(eh->type == ET_EXEC)
s.value -= sh[shid].addr;
name = (const char *)((uintptr_t)hh[symtab->link]->data + s.name);
if(name[0] == '\0')
continue;
char name2[512];
char* demangled = cplus_demangle_v3(name, 0);
snprintf(name2, sizeof(name2), "%.96s@%x", demangled ? demangled : name, s.size); // there seems to be a limit of symbol names in AmigaDOS, 128 won't work.
free(demangled);
if(flags & F_VERBOSE)
printf("\t0x%08x: %s\n", (int)s.value, name2);
lsize = (strlen(name2) + 4) / 4;
wlong(hunk_fd, lsize);
err = write(hunk_fd, name2, lsize * 4);
if(err < 0)
return 0;
wlong(hunk_fd, s.value);
}
wlong(hunk_fd, 0);
return 1;
}
#if OPTION_LIMIT_RELOC_SIZE
static void fcnt_write_reloc32(int hunk_fd, struct hunkheader **hh, int h, int i, int count, int shid)
{
wlong(hunk_fd, count);
D(bug("\t %d relocations relative to Hunk %d\n", count, hh[shid]->hunk));
/* Convert from ELF hunk ID to AOS hunk ID */
wlong(hunk_fd, hh[shid]->hunk);
for(; count > 0; i++, count--) {
char* symbol = hh[h]->reloc[i].symbol;
char* demangled = cplus_demangle_v3(symbol, 0);
D(bug("\t\t%d: 0x%08x %s\n", i, (int)hh[h]->reloc[i].offset, demangled ? demangled : symbol));
free(demangled);
wlong(hunk_fd, hh[h]->reloc[i].offset);
}
}
#endif
static void reloc_dump(int hunk_fd, struct hunkheader **hh, int h)
{
int i;
if(hh[h]->relocs == 0)
return;
/* Sort the relocations by reference hunk id */
qsort(hh[h]->reloc, hh[h]->relocs, sizeof(hh[h]->reloc[0]), reloc_cmp);
wlong(hunk_fd, HUNK_RELOC32);
D(bug("\tHUNK_RELOC32: %d relocations\n", (int)hh[h]->relocs));
for(i = 0; i < hh[h]->relocs; ) {
int count;
int shid = hh[h]->reloc[i].shid;
for(count = i; count < hh[h]->relocs; count++)
if(hh[h]->reloc[count].shid != shid)
break;
count -= i;
#if OPTION_LIMIT_RELOC_SIZE
int max_reloc_cnt = count/MAX_RELOC_SIZE;
int sub_count_remainder = count % MAX_RELOC_SIZE;
int j;
for(int j=0;j < max_reloc_cnt;j++)
{
fcnt_write_reloc32(hunk_fd,hh,h,i,MAX_RELOC_SIZE,shid);
i += MAX_RELOC_SIZE; /* adjust i */
}
if(sub_count_remainder != 0)
{
fcnt_write_reloc32(hunk_fd,hh,h,i,sub_count_remainder,shid);
i += sub_count_remainder; /* adjust i */
}
#else
wlong(hunk_fd, count);
D(bug("\t %d relocations relative to Hunk %d\n", count, hh[shid]->hunk));
/* Convert from ELF hunk ID to AOS hunk ID */
wlong(hunk_fd, hh[shid]->hunk);
for(; count > 0; i++, count--) {
char* symbol = hh[h]->reloc[i].symbol;
char* demangled = cplus_demangle_v3(symbol, 0);
D(bug("\t\t%d: 0x%08x %s\n", i, (int)hh[h]->reloc[i].offset, demangled ? demangled : symbol));
free(demangled);
wlong(hunk_fd, hh[h]->reloc[i].offset);
}
#endif
}
wlong(hunk_fd, 0);
}
static int copy_to(int in, int out)
{
static char buff[64 * 1024];
int len, err = 0;
do {
len = read(in, buff, sizeof(buff));
if(len < 0) {
perror("Can't read from input file\n");
err = len;
}
if(len == 0)
break;
} while((err = write(out, buff, len)) == len);
if(err < 0) {
perror("Can't write to output file\n");
return -errno;
}
return 0;
}
int elf2hunk(int file, int hunk_fd, const char *libname, int flags)
{
const char *names[3] = { "CODE", "DATA", "BSS" };
struct hunkheader **hh;
struct elfheader eh;
struct sheader *sh;
char **strtab = NULL;
int symtab_shndx = -1;
int err;
ULONG i;
BOOL exec_hunk_seen = FALSE;
ULONG int_shnum;
int hunks = 0;
/* load and validate ELF header */
D(bug("Load header\n"));
if((flags & F_NOCONVERT) || !load_header(file, &eh)) {
/* If it's not an ELF, just copy it.
*
* This simplifies a number of makefiles
* for the m68k-amiga boot and ISO creation
*/
lseek(file, 0, SEEK_SET);
return (copy_to(file, hunk_fd) == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}
D(bug("Read SHNum\n"));
int_shnum = read_shnum(file, &eh);
if(!int_shnum)
return EXIT_FAILURE;
/* load section headers */
D(bug("Load %d Section Headers @0x%08x\n", int_shnum, (int)eh.shoff));
if(!(sh = load_block(file, eh.shoff, int_shnum * eh.shentsize)))
return EXIT_FAILURE;
sh_fixup(sh, int_shnum);
/* Looks like we have a valid executable. Generate a
* HUNK header set. Not all may be filled in.
*/
hh = calloc(sizeof(*hh), int_shnum);
strtab = calloc(sizeof(*strtab), int_shnum);
/* Look for the string table */
D(bug("Look for string tables\n"));
for(i = 0; i < int_shnum; i++) {
if(sh[i].type == SHT_STRTAB) {
strtab[i] = load_block(file, sh[i].offset, sh[i].size);
D(bug("> [%d] offset=%d size=%d\n", i, sh[i].offset, sh[i].size));
}
}
/* Iterate over the section headers in order to do some stuff... */
D(bug("Look for symbol tables\n"));
for(i = 0; i < int_shnum; i++)
{
/*
Load the symbol and string table(s).
NOTICE: the ELF standard, at the moment (Nov 2002) explicitly states
that only one symbol table per file is allowed. However, it
also states that this may change in future... we already handle it.
*/
if(flags & F_VERBOSE)
printf("sh[%2d].type = 0x%08x, .offset = 0x%08x, .size = 0x%08x, .name = '%s'\n",
(int)i, (int)sh[i].type, (int)sh[i].offset, (int)sh[i].size, strtab[eh.shstrndx] ? (strtab[eh.shstrndx] + sh[i].name) : "");
if(sh[i].type == SHT_SYMTAB || sh[i].type == SHT_STRTAB || sh[i].type == SHT_SYMTAB_SHNDX) {
hh[i] = calloc(sizeof(struct hunkheader), 1);
hh[i]->type = (sh[i].type == SHT_SYMTAB) ? HUNK_SYMBOL : 0;
hh[i]->memflags = 0;
hh[i]->hunk = -1;
hh[i]->data = load_block(file, sh[i].offset, sh[i].size);
if(!hh[i]->data)
goto error;
if(sh[i].type == SHT_SYMTAB_SHNDX) {
if(symtab_shndx == -1)
symtab_shndx = i;
else
printf("[ELF2HUNK] file contains multiple symtab shndx tables. only using the first one\n");
}
} else {
/* Load the section in memory if needed, and make an hunk out of it */
if((sh[i].flags & SHF_ALLOC) && sh[i].size > 0) {
hh[i] = calloc(sizeof(struct hunkheader), 1);
hh[i]->size = sh[i].size;
hh[i]->hunk = hunks++;
if(sh[i].type == SHT_NOBITS) {
/* BSS area */
hh[i]->type = HUNK_BSS;
hh[i]->memflags = 0;
hh[i]->data = NULL;
} else {
if(sh[i].flags & SHF_EXECINSTR) {
hh[i]->type = HUNK_CODE;
exec_hunk_seen = TRUE;
} else {
hh[i]->type = HUNK_DATA;
}
hh[i]->data = load_block(file, sh[i].offset, sh[i].size);
}
if(strtab[eh.shstrndx]) {
const char* nameext;
//D(bug("section %d '%s'\n", sh[i].name, strtab[eh.shstrndx] + sh[i].name));
nameext = strrchr(strtab[eh.shstrndx] + sh[i].name, '.');
if(nameext) {
if(strcmp(nameext, ".MEMF_CHIP") == 0) {
hh[i]->memflags |= MEMF_CHIP;
} else if(strcmp(nameext, ".MEMF_LOCAL") == 0) {
hh[i]->memflags |= MEMF_LOCAL;
} else if(strcmp(nameext, ".MEMF_KICK") == 0) {
hh[i]->memflags |= MEMF_KICK;
} else if(strcmp(nameext, ".MEMF_FAST") == 0) {
hh[i]->memflags |= MEMF_FAST;
}
}
}
}
}
}
if(flags & F_PCREL) {
// calc total size
ULONG total_size = 0;
for(i = 0; i < int_shnum; i++) {
if(hh[i] == NULL || hh[i]->hunk < 0)
continue;
ULONG end_of_section = sh[i].addr + sh[i].size;
if(end_of_section > total_size)
total_size = end_of_section;
}
total_size = (total_size + 3) & ~3; // round up to longword
if(flags & F_VERBOSE)
printf("Total size: $%08x\n", total_size);
// create combined data
char* total_data = calloc(1, total_size);
for(i = 0; i < int_shnum; i++) {
if(hh[i] == NULL || hh[i]->hunk < 0)
continue;
if(flags & F_VERBOSE)
printf("HUNK_%d: addr = $%08x, size = $%08x\n", hh[i]->type, sh[i].addr, hh[i]->size);
if(!hh[i]->data)
continue;
memcpy(total_data + sh[i].addr, hh[i]->data, hh[i]->size);
}
if(flags & F_BINARY) {
// write combined data
err = write(hunk_fd, total_data, total_size);
if(err < 0)
return EXIT_FAILURE;
} else {
wlong(hunk_fd, HUNK_HEADER);
wlong(hunk_fd, 0); // No name
wlong(hunk_fd, 1);
wlong(hunk_fd, 0); // First hunk is #0
wlong(hunk_fd, 0); // Last hunk is #0
wlong(hunk_fd, total_size / 4); // hunk size #0 in long words
wlong(hunk_fd, HUNK_CODE);
wlong(hunk_fd, total_size / 4);
// write combined data
err = write(hunk_fd, total_data, total_size);
if(err < 0)
return EXIT_FAILURE;
wlong(hunk_fd, HUNK_END);
}
free(total_data);
} else {
/* Relocate the sections */
D(bug("Convert relocation tables\n"));
for(i = 0; i < int_shnum; i++)
{
/* Does this relocation section refer to a hunk? If so, addr must be != 0 */
if((sh[i].type == AROS_ELF_REL) && hh[sh[i].info] && hh[sh[i].info]->data)
{
void *reloc = load_block(file, sh[i].offset, sh[i].size);
if(!relocate(&eh, sh, i, symtab_shndx, reloc, hh))
return EXIT_FAILURE;