Subversion Repositories mips789

/* convert.c by Steve Rhoads 4/26/01 */

/* Now uses the ELF format (get gccmips_elf.zip) */

/* set $gp and zero .sbss and .bss */

/* Reads test.axf and creates code.txt */

/* modified by Liwei 2007-8-29 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define BUF_SIZE (1024*1024*4)

/*Assumes running on PC little endian*/

#ifndef USE_BIG_ENDIAN 

#define ntohl(A) (((A)>>24)|(((A)&0x00ff0000)>>8)|(((A)&0xff00)<<8)|((A)<<24))

#define ntohs(A) (unsigned short)((((A)&0xff00)>>8)|((A)<<8))

#else 

#define ntohl(A) A 

#define ntohs(A) A 

#endif 

#define EI_NIDENT 16 

#define SHT_PROGBITS 1 

#define SHT_STRTAB 3 

#define SHT_NOBITS 8 

typedef struct

{

    unsigned char e_ident[EI_NIDENT];

    unsigned short e_e_type ;

    unsigned short e_machine ;

    unsigned long e_version ;

    unsigned long e_entry ;

    unsigned long e_phoff ;

    unsigned long e_shoff ;

    unsigned long e_flags ;

    unsigned short e_ehsize ;

    unsigned short e_phentsize ;

    unsigned short e_phnum ;

    unsigned short e_shentsize ;

    unsigned short e_shnum ;

    unsigned short e_shstrndx ;

}

ElfHeader ;

typedef struct

{

    unsigned long p_type ;

    unsigned long p_offset ;

    unsigned long p_vaddr ;

    unsigned long p_paddr ;

    unsigned long p_filesz ;

    unsigned long p_memsz ;

    unsigned long p_flags ;

    unsigned long p_align ;

}

Elf32_Phdr ;

typedef struct

{

    unsigned long sh_name ;

    unsigned long sh_type ;

    unsigned long sh_flags ;

    unsigned long sh_addr ;

    unsigned long sh_offset ;

    unsigned long sh_size ;

    unsigned long sh_link ;

    unsigned long sh_info ;

    unsigned long sh_addralign ;

    unsigned long sh_entsize ;

}

Elf32_Shdr ;

typedef struct

{

    unsigned long ri_gprmask ;

    unsigned long ri_cprmask[4];

    unsigned long ri_gp_value ;

}

ELF_RegInfo ;

#define PT_MIPS_REGINFO 0x70000000 

#define SHT_MIPS_REGINFO 0x70000006 

void set_low(unsigned char*ptr,unsigned long address,unsigned long value)

{

    unsigned long opcode ;

    opcode=*(unsigned long*)(ptr+address);

    opcode=ntohl(opcode);

    opcode=(opcode&0xffff0000)|(value&0xffff);

    opcode=ntohl(opcode);

    *(unsigned long*)(ptr+address)=opcode ;

}

/*the two functions listed between are added by Liwei 2007-8-29*/

char HEX[]="0123456789ABCDEF" ;

char hex[]="0123456789abcdef" ;

unsigned char hex2byte(char hex_char)

{

    unsigned char i ;

    for(i=0;i<16;++i)if(HEX[i]==hex_char)return i ;

    for(i=0;i<16;++i)if(hex[i]==hex_char)return i ;

    return 0 ;

}

unsigned int par2u32(char*par)

{

    unsigned int i,ret=0 ;

    if(par==NULL)return ;

    if((0==strncmp(par,"0x",2))||(0==strncmp(par,"0X",2)))

    for(i=2;;++i)

    {

        if(par[i]=='\0')return ret ;

        ret=ret*16+hex2byte(par[i]);

    }

    else

    for(i=0;;++i)

    {

        if(par[i]=='\0')return ret ;

        ret=ret*10+hex2byte(par[i]);

    }

    return 0 ;

}

/****************************/

int main(int argc,char*argv[])

{

    FILE*infile,*outfile,*txtfile ;

    unsigned char*buf,*code ;

    long size,stack_pointer ;

    long stack_limit=0 ;

    unsigned long length,d,i,gp_ptr=0,gp_ptr_backup=0 ;

    unsigned long bss_start=0,bss_end=0 ;

    ElfHeader*elfHeader ;

    Elf32_Phdr*elfProgram ;

    ELF_RegInfo*elfRegInfo ;

    Elf32_Shdr*elfSection ;

    (void)argc ;

    (void)argv ;

    //    printf(">%s<=>%d<\n",argv[1],par2u32((char*)argv[1]));//Liwei 2007-8.29

    //   printf(">%s<=>%d<\n",argv[2],par2u32((char*)argv[2]));//Liwei 2007-8.29

    // printf("argc = %d\n",argc);

    if(argc>=3)

    stack_limit=((par2u32((char*)argv[1])-par2u32((char*)argv[2])));

    //alig 4

    /* added by Liwei  2007_8_29 */

    /*usage example :

                       convert_sp 0x800 0xf0

                       the sp_pointer is limited and set as (0x800 - 0xf0)

                       0x800 is your instructions space lenth while 0xf0 is your stack lenth

                       but make sure your instructions space is big enough...

                       comment by Liwei

                       */

    printf("test.axf -> code.txt & test.bin\n");

    infile=fopen("test.axf","rb");

    if(infile==NULL)

    {

        printf("Can't open test.axf");

        return 0 ;

    }

    buf=(unsigned char*)malloc(BUF_SIZE);

    size=(int)fread(buf,1,BUF_SIZE,infile);

    fclose(infile);

    code=(unsigned char*)malloc(BUF_SIZE);

    memset(code,0,BUF_SIZE);

    elfHeader=(ElfHeader*)buf ;

    if(strncmp((char*)elfHeader->e_ident+1,"ELF",3))

    {

        printf("Error:  Not an ELF file!\n");

        printf("Use the gccmips_elf.zip from opencores/projects/plasma!\n");

        return-1 ;

    }

    elfHeader->e_entry=ntohl(elfHeader->e_entry);

    elfHeader->e_phoff=ntohl(elfHeader->e_phoff);

    elfHeader->e_shoff=ntohl(elfHeader->e_shoff);

    elfHeader->e_flags=ntohl(elfHeader->e_flags);

    elfHeader->e_phentsize=ntohs(elfHeader->e_phentsize);

    elfHeader->e_phnum=ntohs(elfHeader->e_phnum);

    elfHeader->e_shentsize=ntohs(elfHeader->e_shentsize);

    elfHeader->e_shnum=ntohs(elfHeader->e_shnum);

    printf("Entry=0x%x ",elfHeader->e_entry);

    length=0 ;

    for(i=0;i<elfHeader->e_phnum;++i)

    {

        elfProgram=(Elf32_Phdr*)(buf+elfHeader->e_phoff+

        elfHeader->e_phentsize*i);

        elfProgram->p_type=ntohl(elfProgram->p_type);

        elfProgram->p_offset=ntohl(elfProgram->p_offset);

        elfProgram->p_vaddr=ntohl(elfProgram->p_vaddr);

        elfProgram->p_filesz=ntohl(elfProgram->p_filesz);

        elfProgram->p_memsz=ntohl(elfProgram->p_memsz);

        elfProgram->p_flags=ntohl(elfProgram->p_flags);

        elfProgram->p_vaddr-=elfHeader->e_entry ;

        if(elfProgram->p_type==PT_MIPS_REGINFO)

        {

            elfRegInfo=(ELF_RegInfo*)(buf+elfProgram->p_offset);

            gp_ptr=ntohl(elfRegInfo->ri_gp_value);

        }

        if(elfProgram->p_vaddr<BUF_SIZE)

        {

            /* printf("[0x%x,0x%x,0x%x,0x%x,0x%x]\n", elfProgram->p_vaddr, */

            /*    elfProgram->p_offset, elfProgram->p_filesz, elfProgram->p_memsz, */

            /*    elfProgram->p_flags); */

            memcpy(code+elfProgram->p_vaddr,buf+elfProgram->p_offset,

            elfProgram->p_filesz);

            length=elfProgram->p_vaddr+elfProgram->p_filesz ;

            /* printf("length = %d 0x%x\n", length, length); */

        }

    }

    for(i=0;i<elfHeader->e_shnum;++i)

    {

        elfSection=(Elf32_Shdr*)(buf+elfHeader->e_shoff+

        elfHeader->e_shentsize*i);

        elfSection->sh_name=ntohl(elfSection->sh_name);

        elfSection->sh_type=ntohl(elfSection->sh_type);

        elfSection->sh_addr=ntohl(elfSection->sh_addr);

        elfSection->sh_offset=ntohl(elfSection->sh_offset);

        elfSection->sh_size=ntohl(elfSection->sh_size);

        if(elfSection->sh_type==SHT_MIPS_REGINFO)

        {

            elfRegInfo=(ELF_RegInfo*)(buf+elfSection->sh_offset);

            gp_ptr=ntohl(elfRegInfo->ri_gp_value);

        }

        if(elfSection->sh_type==SHT_PROGBITS)

        {

            /* printf("elfSection->sh_addr=0x%x\n", elfSection->sh_addr); */

            if(elfSection->sh_addr>gp_ptr_backup)

            gp_ptr_backup=elfSection->sh_addr ;

        }

        if(elfSection->sh_type==SHT_NOBITS)

        {

            if(bss_start==0)

            {

                bss_start=elfSection->sh_addr ;

            }

            bss_end=elfSection->sh_addr+elfSection->sh_size ;

        }

    }

    if(length>bss_start-elfHeader->e_entry)

    {

        length=bss_start-elfHeader->e_entry ;

    }

    if(bss_start==length)

    {

        bss_start=length ;

        bss_end=length+4 ;

    }

    if(gp_ptr==0)

    gp_ptr=gp_ptr_backup+0x7ff0 ;

    /* #if 0 */

    /*Initialize the $gp register for sdata and sbss */

    printf("gp_ptr=0x%x ",gp_ptr);

    /*modify the first opcodes in boot.asm */

    /*modify the lui opcode */

    set_low(code,0,gp_ptr>>16);

    /*modify the ori opcode */

    set_low(code,4,gp_ptr&0xffff);

    /*Clear .sbss and .bss */

    printf("sbss=0x%x bss_end=0x%x\nlength=0x%x ",bss_start,bss_end,length);

    set_low(code,8,bss_start>>16);

    set_low(code,12,bss_start&0xffff);

    set_low(code,16,bss_end>>16);

    set_low(code,20,bss_end&0xffff);

    /*Set stack pointer */

    if(elfHeader->e_entry<0x10000000)

    stack_pointer=bss_end+512 ;

    else

    stack_pointer=bss_end+1024*4 ;

    if(stack_limit)stack_pointer=(stack_pointer<stack_limit)?stack_pointer:stack_limit ;

    //added by Liwei 2007-8-29

    stack_pointer&=~7 ;

    printf("SP=0x%x\n",stack_pointer);

    set_low(code,24,stack_pointer>>16);

    set_low(code,28,stack_pointer&0xffff);

    /* #endif */

    /*write out test.bin */

    outfile=fopen("test.bin","wb");

    fwrite(code,length,1,outfile);

    fclose(outfile);

    /*write out code.txt */

    txtfile=fopen("code.txt","w");

    for(i=0;i<=length;i+=4)

    {

        d=ntohl(*(unsigned long*)(code+i));

        fprintf(txtfile,"%8.8x\n",d);

    }

    fclose(txtfile);

    free(buf);

    printf("\n");

    return 0 ;

}