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ElfReader now supports section information.

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ElfReader can now get Section start address,
end address and size by its name.
Or the according section name to any address within
a section

See ElfReader.hpp for API.

git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@2070 8c4709b5-6ec9-48aa-a5cd-a96041d1645a
This commit is contained in:
hoffmann
2013-02-07 00:51:25 +00:00
parent 7b7ae8e825
commit 609ac58c8f
4 changed files with 190 additions and 47 deletions
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60
src/core/util/elfinfo/elfinfo.cc
View File

@ -1,8 +1,8 @@
/* DISCLAIMER :This is a FREE SOFTWARE You can Use it at your own RISK
that is if you are screwed by using this software, then
that is if you are screwed by using this software, then
accept the fact that you screwed yourself.
## THIS HAS BEEN DEVELOPED AND TESTED UNDER FEDORA-9 HOPEFULLY IT WILL
## WORK ON OTHER SYSTEMS
## THIS HAS BEEN DEVELOPED AND TESTED UNDER FEDORA-9 HOPEFULLY IT WILL
## WORK ON OTHER SYSTEMS
======================================================================
elfinfo.c - Copyright (C)2008 Ashok Shankar Das ashok.s.das@gmail.com
@ -28,10 +28,10 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include <string.h>
#include <elf.h>
void read_ELF_file_header(FILE* fp,Elf32_Ehdr *filehdr)
{
//rewind(fp);
//rewind(fp);
fread(filehdr,sizeof(Elf32_Ehdr),1,fp);
}
@ -50,7 +50,7 @@ int read_ELF_section_header(int sect_num,Elf32_Shdr *sect_hdr,FILE *fp)
Elf32_Ehdr elfhdr;
off_t sect_hdr_off;
fseek(fp,(off_t)0,SEEK_SET);
read_ELF_file_header(fp,&elfhdr);
read_ELF_file_header(fp,&elfhdr);
numsect=elfhdr.e_shnum;
if ((numsect<sect_num)||(sect_num<0))
return -1;
@ -59,20 +59,21 @@ int read_ELF_section_header(int sect_num,Elf32_Shdr *sect_hdr,FILE *fp)
sect_hdr_off+=elfhdr.e_shentsize*sect_num;
fseek(fp,(off_t)sect_hdr_off,SEEK_SET);
fread(sect_hdr,sizeof(Elf32_Shdr),1,fp);
return 1;
return 1;
}
void process_sect_hdr(Elf32_Shdr *sect_hdr,char *sect_name_buff)
{
int idx;
idx=sect_hdr->sh_name;
printf(" %-20s ",sect_name_buff+idx);
printf(" %-20s (0x%x++0x%x) ",sect_name_buff+idx, sect_hdr->sh_addr, sect_hdr->sh_size);
if(sect_hdr->sh_entsize)
printf(" %c ",'*');
else
printf(" %c ",' ');
switch(sect_hdr->sh_type)
{
{
case 0: printf("NULL \t");
break;
case 1: printf("PROGBITS \t");
@ -120,7 +121,7 @@ void process_sect_hdr(Elf32_Shdr *sect_hdr,char *sect_name_buff)
case 0x6ffffff8: printf("CKSUM \t");
break;
case 0x6ffffffa: printf("SUN SPECIFIC \t");
break;
break;
case 0x6ffffffb: printf("SUNCOMDAT \t");
break;
case 0x6ffffffc: printf("SUNSYMINFO \t");
@ -148,7 +149,7 @@ void display_sections(FILE *fp)
Elf32_Ehdr ehdr;
Elf32_Shdr sec_hdr;
int num_hdrs,i;
char *buff=NULL;
char *buff=NULL;
fseek(fp,(off_t)0,SEEK_SET);
read_ELF_file_header(fp, &ehdr);
if(is_ELF(&ehdr)==-1)
@ -173,7 +174,7 @@ void display_sections(FILE *fp)
//seek to the offset in the file,
fseek(fp,(off_t)sec_hdr.sh_offset,SEEK_SET);
fread(buff,sec_hdr.sh_size,1,fp);
printf("There are [%d] sections\n",num_hdrs);
printf("There are [%d] sections\n",num_hdrs);
for(i=0;i<num_hdrs;i++)
{
if(read_ELF_section_header(i,&sec_hdr,fp)==-1)
@ -184,7 +185,7 @@ void display_sections(FILE *fp)
{
printf("[section %3d] ",i);
process_sect_hdr(&sec_hdr,buff);
}
}
if(buff)
@ -193,7 +194,7 @@ void display_sections(FILE *fp)
int process_symtab(int sect_num,FILE *fp)
{
Elf32_Shdr sect_hdr;
Elf32_Shdr sect_hdr;
Elf32_Sym mysym;
char *name_buf=NULL;
int num_sym,link,i,idx;
@ -207,32 +208,32 @@ int process_symtab(int sect_num,FILE *fp)
link=sect_hdr.sh_link;
sym_data_offset=sect_hdr.sh_offset;
sym_data_size=sect_hdr.sh_size;
num_sym=sym_data_size/sizeof(Elf32_Sym);
num_sym=sym_data_size/sizeof(Elf32_Sym);
//read the coresponding strtab
if(read_ELF_section_header(link,&sect_hdr,fp)==-1)
{
return -1;
}
//get the size of strtab in file and allocate a buffer
//get the size of strtab in file and allocate a buffer
name_buf=(char*)malloc(sect_hdr.sh_size);
if(!name_buf)
return -1;
//get the offset of strtab in file and seek to it
fseek(fp,sect_hdr.sh_offset,SEEK_SET);
//read all data from the section to the buffer.
fread(name_buf,sect_hdr.sh_size,1,fp);
fread(name_buf,sect_hdr.sh_size,1,fp);
//so we have the namebuf now seek to symtab data
fseek(fp,sym_data_offset,SEEK_SET);
printf("[%d] symbols\n",num_sym);
for(i=0;i<num_sym;i++)
{
//memcpy((char *)&mysym,(char *)sym_buf,sizeof(Elf32_Sym));
fread(&mysym,sizeof(Elf32_Sym),1,fp);
//dump_sym(&mysym);
idx=mysym.st_name;
//printf("symbol %d index in strtab %d\n",i,idx);
//printf("symbol %d index in strtab %d\n",i,idx);
printf("[%3d] %s ",i,name_buf+idx);
switch(ELF32_ST_BIND(mysym.st_info))
{
@ -253,8 +254,8 @@ int process_symtab(int sect_num,FILE *fp)
case 15: printf("CPU-specific-end ");
break;
}
switch(ELF32_ST_TYPE(mysym.st_info))
{
case 0: printf(" NOTYPE ");
@ -302,14 +303,14 @@ int process_symtab(int sect_num,FILE *fp)
break;
case SHN_XINDEX: printf(" XINDEX ");
break;
}
}
printf("\n");
}
if(name_buf)
free(name_buf);
return 0;
}
@ -329,15 +330,16 @@ void dump_symbols(FILE *fp)
}
else
{
if((sec_hdr.sh_type==SHT_SYMTAB)||(sec_hdr.sh_type==SHT_DYNSYM))
if((sec_hdr.sh_type==SHT_SYMTAB)||(sec_hdr.sh_type==SHT_DYNSYM))
{
printf("\n[section %3d] contains ",i);
process_symtab(i,fp);
}
else
continue;
continue;
}
}
}

1
src/core/util/elfinfo/elfinfo.h
View File

@ -17,5 +17,6 @@
void read_ELF_file_header(FILE* fp,Elf32_Ehdr *filehdr);
int read_ELF_section_header(int sect_num,Elf32_Shdr *sect_hdr,FILE *fp);
void display_sections(FILE *fp);
#endif // ELFINFO_H