Data Structures
class	eh_frame

class	common_entry

class	ci_entry

class	fd_entry

Macros
#define	DW_EH_PE_absptr 0x00

#define	DW_EH_PE_uleb128 0x01

#define	DW_EH_PE_udata2 0x02

#define	DW_EH_PE_udata4 0x03

#define	DW_EH_PE_udata8 0x04

#define	DW_EH_PE_sleb128 0x09

#define	DW_EH_PE_sdata2 0x0A

#define	DW_EH_PE_sdata4 0x0B

#define	DW_EH_PE_sdata8 0x0C

#define	DW_EH_PE_pcrel 0x10

#define	DW_EH_PE_textrel 0x20

#define	DW_EH_PE_datarel 0x30

#define	DW_EH_PE_funcrel 0x40

#define	DW_EH_PE_aligned 0x50

#define	DW_EH_PE_omit 0xFF

#define	DW_CFA_GNU_args_size 0x2E

#define	DW_CFA_GNU_negative_offset_extended 0x2F

Functions
uint64_t	decode_pointer (char **addr, uint64_t encoding)

Macro Definition Documentation

◆ DW_EH_PE_absptr

#define DW_EH_PE_absptr 0x00

Definition at line 98 of file eh_frame.h.

◆ DW_EH_PE_uleb128

#define DW_EH_PE_uleb128 0x01

Definition at line 99 of file eh_frame.h.

◆ DW_EH_PE_udata2

#define DW_EH_PE_udata2 0x02

Definition at line 100 of file eh_frame.h.

◆ DW_EH_PE_udata4

#define DW_EH_PE_udata4 0x03

Definition at line 101 of file eh_frame.h.

◆ DW_EH_PE_udata8

#define DW_EH_PE_udata8 0x04

Definition at line 102 of file eh_frame.h.

◆ DW_EH_PE_sleb128

#define DW_EH_PE_sleb128 0x09

Definition at line 103 of file eh_frame.h.

◆ DW_EH_PE_sdata2

#define DW_EH_PE_sdata2 0x0A

Definition at line 104 of file eh_frame.h.

◆ DW_EH_PE_sdata4

#define DW_EH_PE_sdata4 0x0B

Definition at line 105 of file eh_frame.h.

◆ DW_EH_PE_sdata8

#define DW_EH_PE_sdata8 0x0C

Definition at line 106 of file eh_frame.h.

◆ DW_EH_PE_pcrel

#define DW_EH_PE_pcrel 0x10

Definition at line 109 of file eh_frame.h.

◆ DW_EH_PE_textrel

#define DW_EH_PE_textrel 0x20

Definition at line 110 of file eh_frame.h.

◆ DW_EH_PE_datarel

#define DW_EH_PE_datarel 0x30

Definition at line 111 of file eh_frame.h.

◆ DW_EH_PE_funcrel

#define DW_EH_PE_funcrel 0x40

Definition at line 112 of file eh_frame.h.

◆ DW_EH_PE_aligned

#define DW_EH_PE_aligned 0x50

Definition at line 113 of file eh_frame.h.

◆ DW_EH_PE_omit

#define DW_EH_PE_omit 0xFF

Definition at line 116 of file eh_frame.h.

◆ DW_CFA_GNU_args_size

#define DW_CFA_GNU_args_size 0x2E

Definition at line 147 of file eh_frame.h.

◆ DW_CFA_GNU_negative_offset_extended

#define DW_CFA_GNU_negative_offset_extended 0x2F

Definition at line 148 of file eh_frame.h.

Function Documentation

◆ decode_pointer()

uint64_t decode_pointer	(	char **	addr,
		uint64_t	encoding
	)

Decode Pointer

Decodes a pointer located at addr, given the provided encoding scheme. The whole reason this function exists is that for most pointers in an executable, not all of the address bits are needed. For example, on a 64bit system, most executables are well under 1GB, and thus, the vast majority of address bits are not needed to relay an address. To save space, pointers are encoded, and this function provides the decoding logic.

Note that for 64bit, you are only likely to PC relative addressing. This is because in 64bit, all of the code is relocatable.

Parameters

addr	the location of the encoded pointer. Note that this takes a double pointer. This is because the total size of the pointer is not know until it is decoded. Therefore, this function not only decodes but it also advances the address based on the size of the pointer.
encoding	the scheme by which the pointer is encoded.

Returns: the resulting pointer

Definition at line 33 of file eh_frame.cpp.

Data Structures

Macros

Functions