OpenE2K/qemu-e2k
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qemu-e2k/hw/magic-load.c
bellard 8d5f07fa3b sparc merge (Blue Swirl) 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1098 c046a42c-6fe2-441c-8c8c-71466251a162
2004-10-04 21:23:09 +00:00

327 lines
7.6 KiB
C
Raw Blame History

#include "vl.h"
#include "disas.h"
#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 int 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 -1;
retval = read(fd, shdr, sizeof(*shdr));
if (retval < 0)
return -1;
bswap_shdr(shdr);
if (shdr->sh_type == SHT_STRTAB)
return qemu_malloc(shdr->sh_size);;
return 0;
}
static int read_program(int fd, struct elf_phdr *phdr, void *dst)
{
int retval;
retval = lseek(fd, 0x4000, 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;
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 */
if (disas_symtab)
qemu_free(disas_symtab); /* XXX Merge with old symbols? */
if (disas_strtab)
qemu_free(disas_strtab);
disas_symtab = syms;
disas_num_syms = nsyms;
disas_strtab = str;
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)
goto error;
if (find_phdr(&ehdr, fd, &phdr, PT_LOAD))
goto error;
retval = read_program(fd, &phdr, addr);
if (retval < 0)
goto error;
load_symbols(&ehdr, fd);
close(fd);
return retval;
error:
close(fd);
return -1;
}
int load_kernel(const char *filename, uint8_t *addr)
{
int fd, size;
fd = open(filename, O_RDONLY | O_BINARY);
if (fd < 0)
return -1;
/* load 32 bit code */
size = read(fd, addr, 16 * 1024 * 1024);
if (size < 0)
goto fail;
close(fd);
return size;
fail:
close(fd);
return -1;
}
typedef struct MAGICState {
uint32_t addr;
uint32_t saved_addr;
int magic_state;
char saved_kfn[1024];
} MAGICState;
static uint32_t magic_mem_readl(void *opaque, target_phys_addr_t addr)
{
int ret;
MAGICState *s = opaque;
if (s->magic_state == 0) {
ret = load_elf(s->saved_kfn, (uint8_t *)s->saved_addr);
if (ret < 0)
ret = load_kernel(s->saved_kfn, (uint8_t *)s->saved_addr);
if (ret < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
s->saved_kfn);
}
s->magic_state = 1; /* No more magic */
tb_flush();
return bswap32(ret);
}
return 0;
}
static void magic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
}
static CPUReadMemoryFunc *magic_mem_read[3] = {
magic_mem_readl,
magic_mem_readl,
magic_mem_readl,
};
static CPUWriteMemoryFunc *magic_mem_write[3] = {
magic_mem_writel,
magic_mem_writel,
magic_mem_writel,
};
void magic_init(const char *kfn, int kloadaddr, uint32_t addr)
{
int magic_io_memory;
MAGICState *s;
s = qemu_mallocz(sizeof(MAGICState));
if (!s)
return;
strcpy(s->saved_kfn, kfn);
s->saved_addr = kloadaddr;
s->magic_state = 0;
s->addr = addr;
magic_io_memory = cpu_register_io_memory(0, magic_mem_read, magic_mem_write, s);
cpu_register_physical_memory(addr, 4, magic_io_memory);
}
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