Extended Section:. attributes in DOJ

 

Happy shrimp

Http://blog.csdn.net/lights_joy/

Lights@hb165.com

 

 

This article applies

Bfinutils-2.19

Vs2008

Visual DSP +++ 5.0

 

Reprinted, but keep the author information

 

The DOJ file in vdsp adopts the ELF format, but some extensions are made. attributes is an additional section, and its section head can be set to the following values:

 

Table 0	Attribute Value	Additional instructions
Sh_name	17	Section name, index in string TBL
Sh_type	Strtab	Type of Section
Sh_flags	Zero X 00000000	Miscellaneous section attributes
Sh_addr	Zero X 00000000	Section virtual ADDR at Execution
Sh_offset	24173	Section file offset
Sh_size	248	Size of section in bytes
Sh_link	0	Index of another section
Sh_info	Zero X 00000000	Additional section information
Sh_addralign	0	Section alignment
Sh_entsize	0	Entry size if section holds table

Its sh_type value is strtab, that is, this segment stores only the string list. Press strtab to expand its content:

Table 0	Start position	String Value
1	0
2	1	Projectname common
3	20	Projectname common
4	39	Funcname _ env_get_addr
5	62	Funcname _ env_get_char_memory
6	92	Funcname _ env_crc_update
7	117	Funcname _ env_get_char_init
8	145	Funcname _ env_relocate
9	168	Funcname _ env_complete
10	191	Content codedata
11	208	Si-revision 0.3
12	224	Processor-ID ADSP-BF561

 

Obviously, each row defines an attribute and separates the attribute names and values with/T. In this way, the content in the Table above can be interpreted:

 

Table 0	Attribute name	Attribute Value
1	Projectname	Common
2	Projectname	Common
3	Funcname	_ Env_get_addr
4	Funcname	_ Env_get_char_memory
5	Funcname	_ Env_crc_update
6	Funcname	_ Env_get_char_init
7	Funcname	_ Env_relocate
8	Funcname	_ Env_complete
9	Content	Codedata
10	Si-Revision	0.3
11	Processor-ID	ADSP-BF561

 

 

References

BFD support for multiple targets( )

BFD support for elf32 format( 2008-11-7 )

Differences between objdump and readelf( 2008-11-10 )

Objdump code analysis( 2008-11-10 )

BFD file format Recognition( 2008-11-10 )

Backend Data Representation of BFD( 2008-11-10 )

Memory leakage in BFD( 2008-11-13 )

Processing ELF file headers using BFD( 2008-11-27 )

Add a target for processing vdsp files in BFD.( 2008-11-27 )

Extended Section:. CommandLine in DOJ( 2008-11-28 )