Supported PE relocation types

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vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 25 Jul 2006, 12:15

jsut wondering - which relocation types are supported by FASM?

Code:

// I386 relocation types.
//
#define IMAGE_REL_I386_ABSOLUTE         0x0000  // Reference is absolute, no relocation is necessary
#define IMAGE_REL_I386_DIR16            0x0001  // Direct 16-bit reference to the symbols virtual address
#define IMAGE_REL_I386_REL16            0x0002  // PC-relative 16-bit reference to the symbols virtual address
#define IMAGE_REL_I386_DIR32            0x0006  // Direct 32-bit reference to the symbols virtual address
#define IMAGE_REL_I386_DIR32NB          0x0007  // Direct 32-bit reference to the symbols virtual address, base not included
#define IMAGE_REL_I386_SEG12            0x0009  // Direct 16-bit reference to the segment-selector bits of a 32-bit virtual address
#define IMAGE_REL_I386_SECTION          0x000A
#define IMAGE_REL_I386_SECREL           0x000B
#define IMAGE_REL_I386_TOKEN            0x000C  // clr token
#define IMAGE_REL_I386_SECREL7          0x000D  // 7 bit offset from base of section containing target
#define IMAGE_REL_I386_REL32            0x0014  // PC-relative 32-bit reference to the symbols virtual address

25 Jul 2006, 12:15

f0dder

Joined: 19 Feb 2004
Posts: 3175
Location: Denmark

f0dder 25 Jul 2006, 16:16

Just wondering what relocation types exist in existing 32bit PEs - and which types the win32 PE loader supports Smile

25 Jul 2006, 16:16

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 25 Jul 2006, 16:26

PE laoder supports them all, but they NEVER are used in real executables.

btw, types of relocations depend on processor type, see winnt.h

25 Jul 2006, 16:26

f0dder

Joined: 19 Feb 2004
Posts: 3175
Location: Denmark

f0dder 25 Jul 2006, 16:28

vid wrote:

PE laoder supports them all, but they NEVER are used in real executables.

I'll have to trust you on that, too lazy to fire up IDA right now ^_^

vid wrote:

btw, types of relocations depend on processor type, see winnt.h

Yeah, knew that, thus why I specified 32bit and win32 Smile

25 Jul 2006, 16:28

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8357
Location: Kraków, Poland

Tomasz Grysztar 25 Jul 2006, 19:24

fasm supports IMAGE_REL_BASED_HIGHLOW relocations in 32-bit PE and IMAGE_REL_BASED_DIR64 in 64-bit ones. The IMAGE_REL_I386_* are for COFF objects, not PE images.

25 Jul 2006, 19:24

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