qemu/hw/magic-load.c
bellard e80cfcfc88 SPARC merge
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1179 c046a42c-6fe2-441c-8c8c-71466251a162
2004-12-19 23:18:01 +00:00

344 lines
8.3 KiB
C

#include "vl.h"
#include "disas.h"
#include "exec-all.h"
struct exec
{
uint32_t a_info; /* Use macros N_MAGIC, etc for access */
uint32_t a_text; /* length of text, in bytes */
uint32_t a_data; /* length of data, in bytes */
uint32_t a_bss; /* length of uninitialized data area, in bytes */
uint32_t a_syms; /* length of symbol table data in file, in bytes */
uint32_t a_entry; /* start address */
uint32_t a_trsize; /* length of relocation info for text, in bytes */
uint32_t a_drsize; /* length of relocation info for data, in bytes */
};
#ifdef BSWAP_NEEDED
static void bswap_ahdr(struct exec *e)
{
bswap32s(&e->a_info);
bswap32s(&e->a_text);
bswap32s(&e->a_data);
bswap32s(&e->a_bss);
bswap32s(&e->a_syms);
bswap32s(&e->a_entry);
bswap32s(&e->a_trsize);
bswap32s(&e->a_drsize);
}
#else
#define bswap_ahdr(x) do { } while (0)
#endif
#define N_MAGIC(exec) ((exec).a_info & 0xffff)
#define OMAGIC 0407
#define NMAGIC 0410
#define ZMAGIC 0413
#define QMAGIC 0314
#define _N_HDROFF(x) (1024 - sizeof (struct exec))
#define N_TXTOFF(x) \
(N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
(N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
#define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? TARGET_PAGE_SIZE : 0)
#define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
#define _N_SEGMENT_ROUND(x) (((x) + TARGET_PAGE_SIZE - 1) & ~(TARGET_PAGE_SIZE - 1))
#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
#define N_DATADDR(x) \
(N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
: (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
#define ELF_CLASS ELFCLASS32
#define ELF_DATA ELFDATA2MSB
#define ELF_ARCH EM_SPARC
#include "elf.h"
#ifdef BSWAP_NEEDED
static void bswap_ehdr(Elf32_Ehdr *ehdr)
{
bswap16s(&ehdr->e_type); /* Object file type */
bswap16s(&ehdr->e_machine); /* Architecture */
bswap32s(&ehdr->e_version); /* Object file version */
bswap32s(&ehdr->e_entry); /* Entry point virtual address */
bswap32s(&ehdr->e_phoff); /* Program header table file offset */
bswap32s(&ehdr->e_shoff); /* Section header table file offset */
bswap32s(&ehdr->e_flags); /* Processor-specific flags */
bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
bswap16s(&ehdr->e_phnum); /* Program header table entry count */
bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
bswap16s(&ehdr->e_shnum); /* Section header table entry count */
bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
}
static void bswap_phdr(Elf32_Phdr *phdr)
{
bswap32s(&phdr->p_type); /* Segment type */
bswap32s(&phdr->p_offset); /* Segment file offset */
bswap32s(&phdr->p_vaddr); /* Segment virtual address */
bswap32s(&phdr->p_paddr); /* Segment physical address */
bswap32s(&phdr->p_filesz); /* Segment size in file */
bswap32s(&phdr->p_memsz); /* Segment size in memory */
bswap32s(&phdr->p_flags); /* Segment flags */
bswap32s(&phdr->p_align); /* Segment alignment */
}
static void bswap_shdr(Elf32_Shdr *shdr)
{
bswap32s(&shdr->sh_name);
bswap32s(&shdr->sh_type);
bswap32s(&shdr->sh_flags);
bswap32s(&shdr->sh_addr);
bswap32s(&shdr->sh_offset);
bswap32s(&shdr->sh_size);
bswap32s(&shdr->sh_link);
bswap32s(&shdr->sh_info);
bswap32s(&shdr->sh_addralign);
bswap32s(&shdr->sh_entsize);
}
static void bswap_sym(Elf32_Sym *sym)
{
bswap32s(&sym->st_name);
bswap32s(&sym->st_value);
bswap32s(&sym->st_size);
bswap16s(&sym->st_shndx);
}
#else
#define bswap_ehdr(e) do { } while (0)
#define bswap_phdr(e) do { } while (0)
#define bswap_shdr(e) do { } while (0)
#define bswap_sym(e) do { } while (0)
#endif
static int find_phdr(struct elfhdr *ehdr, int fd, struct elf_phdr *phdr, uint32_t type)
{
int i, retval;
retval = lseek(fd, ehdr->e_phoff, SEEK_SET);
if (retval < 0)
return -1;
for (i = 0; i < ehdr->e_phnum; i++) {
retval = read(fd, phdr, sizeof(*phdr));
if (retval < 0)
return -1;
bswap_phdr(phdr);
if (phdr->p_type == type)
return 0;
}
return -1;
}
static void *find_shdr(struct elfhdr *ehdr, int fd, struct elf_shdr *shdr, uint32_t type)
{
int i, retval;
retval = lseek(fd, ehdr->e_shoff, SEEK_SET);
if (retval < 0)
return NULL;
for (i = 0; i < ehdr->e_shnum; i++) {
retval = read(fd, shdr, sizeof(*shdr));
if (retval < 0)
return NULL;
bswap_shdr(shdr);
if (shdr->sh_type == type)
return qemu_malloc(shdr->sh_size);
}
return NULL;
}
static void *find_strtab(struct elfhdr *ehdr, int fd, struct elf_shdr *shdr, struct elf_shdr *symtab)
{
int retval;
retval = lseek(fd, ehdr->e_shoff + sizeof(struct elf_shdr) * symtab->sh_link, SEEK_SET);
if (retval < 0)
return NULL;
retval = read(fd, shdr, sizeof(*shdr));
if (retval < 0)
return NULL;
bswap_shdr(shdr);
if (shdr->sh_type == SHT_STRTAB)
return qemu_malloc(shdr->sh_size);;
return NULL;
}
static int read_program(int fd, struct elf_phdr *phdr, void *dst, uint32_t entry)
{
int retval;
retval = lseek(fd, phdr->p_offset + entry - phdr->p_vaddr, SEEK_SET);
if (retval < 0)
return -1;
return read(fd, dst, phdr->p_filesz);
}
static int read_section(int fd, struct elf_shdr *s, void *dst)
{
int retval;
retval = lseek(fd, s->sh_offset, SEEK_SET);
if (retval < 0)
return -1;
retval = read(fd, dst, s->sh_size);
if (retval < 0)
return -1;
return 0;
}
static void *process_section(struct elfhdr *ehdr, int fd, struct elf_shdr *shdr, uint32_t type)
{
void *dst;
dst = find_shdr(ehdr, fd, shdr, type);
if (!dst)
goto error;
if (read_section(fd, shdr, dst))
goto error;
return dst;
error:
qemu_free(dst);
return NULL;
}
static void *process_strtab(struct elfhdr *ehdr, int fd, struct elf_shdr *shdr, struct elf_shdr *symtab)
{
void *dst;
dst = find_strtab(ehdr, fd, shdr, symtab);
if (!dst)
goto error;
if (read_section(fd, shdr, dst))
goto error;
return dst;
error:
qemu_free(dst);
return NULL;
}
static void load_symbols(struct elfhdr *ehdr, int fd)
{
struct elf_shdr symtab, strtab;
struct elf_sym *syms;
struct syminfo *s;
int nsyms, i;
char *str;
/* Symbol table */
syms = process_section(ehdr, fd, &symtab, SHT_SYMTAB);
if (!syms)
return;
nsyms = symtab.sh_size / sizeof(struct elf_sym);
for (i = 0; i < nsyms; i++)
bswap_sym(&syms[i]);
/* String table */
str = process_strtab(ehdr, fd, &strtab, &symtab);
if (!str)
goto error_freesyms;
/* Commit */
s = qemu_mallocz(sizeof(*s));
s->disas_symtab = syms;
s->disas_num_syms = nsyms;
s->disas_strtab = str;
s->next = syminfos;
syminfos = s;
return;
error_freesyms:
qemu_free(syms);
return;
}
int load_elf(const char *filename, uint8_t *addr)
{
struct elfhdr ehdr;
struct elf_phdr phdr;
int retval, fd;
fd = open(filename, O_RDONLY | O_BINARY);
if (fd < 0)
goto error;
retval = read(fd, &ehdr, sizeof(ehdr));
if (retval < 0)
goto error;
bswap_ehdr(&ehdr);
if (ehdr.e_ident[0] != 0x7f || ehdr.e_ident[1] != 'E'
|| ehdr.e_ident[2] != 'L' || ehdr.e_ident[3] != 'F'
|| (ehdr.e_machine != EM_SPARC
&& ehdr.e_machine != EM_SPARC32PLUS))
goto error;
if (find_phdr(&ehdr, fd, &phdr, PT_LOAD))
goto error;
retval = read_program(fd, &phdr, addr, ehdr.e_entry);
if (retval < 0)
goto error;
load_symbols(&ehdr, fd);
close(fd);
return retval;
error:
close(fd);
return -1;
}
int load_aout(const char *filename, uint8_t *addr)
{
int fd, size, ret;
struct exec e;
uint32_t magic;
fd = open(filename, O_RDONLY | O_BINARY);
if (fd < 0)
return -1;
size = read(fd, &e, sizeof(e));
if (size < 0)
goto fail;
bswap_ahdr(&e);
magic = N_MAGIC(e);
switch (magic) {
case ZMAGIC:
case QMAGIC:
case OMAGIC:
lseek(fd, N_TXTOFF(e), SEEK_SET);
size = read(fd, addr, e.a_text + e.a_data);
if (size < 0)
goto fail;
break;
case NMAGIC:
lseek(fd, N_TXTOFF(e), SEEK_SET);
size = read(fd, addr, e.a_text);
if (size < 0)
goto fail;
ret = read(fd, addr + N_DATADDR(e), e.a_data);
if (ret < 0)
goto fail;
size += ret;
break;
default:
goto fail;
}
close(fd);
return size;
fail:
close(fd);
return -1;
}