Talk:SELF File Format

Relocations

Offset	Size	Description
0x0	0x4	Relocation Type
0x4	0x4	Long entry: Addend
0x4	0x4	Short entry: 0-19 = Bits 10-29 of offset, 20-31 = addend
0x8	0x4	Long entry: Offset

Relocations can be of two types: 8 byte "short" entries or 12 byte "long" entries. The relocation code is the same as ARM ELF format.

Segment start = Buffer address of segment indexed at "Patch segment"

Symbol start = Buffer address of segment indexed at "Symbol segment"

Address to patch = segment start + offset

P = address to patch

S = "Symbol segment" == 15 ? 0 : symbol start

A = addend

Relocation Type

Start	End	Description
0	3	Short entry if set
4	7	Symbol segment
8	15	Relocation code
16	19	Patch segment
20	27	Long entry: Optional relocation code 2
28	31	Long entry: Optional distance 2
20	31	Short entry: Lower 12 bits of offset

Supported Relocation Codes (1.69)

Code	Description
0	R_ARM_NONE
2	R_ARM_ABS32
3	R_ARM_REL32
10	R_ARM_THM_CALL
28	R_ARM_CALL
29	R_ARM_JUMP24
38	R_ARM_TARGET1 (same as R_ARM_ABS32)
40	R_ARM_V4BX (same as R_ARM_NONE)
41	R_ARM_TARGET2 (same as R_ARM_REL32)
42	R_ARM_PREL31
43	R_ARM_MOVW_ABS_NC
44	R_ARM_MOVT_ABS
47	R_ARM_THM_MOVW_ABS_NC
48	R_ARM_THM_MOVT_ABS