offset.h File Reference

Relative addresses of registers. More...

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General registers

#define OFFSET_ZERO   0x00
#define OFFSET_AT   0x04
#define OFFSET_V0   0x08
#define OFFSET_V1   0x0c
#define OFFSET_A0   0x10
#define OFFSET_A1   0x14
#define OFFSET_A2   0x18
#define OFFSET_A3   0x1c
#define OFFSET_T0   0x20
#define OFFSET_T1   0x24
#define OFFSET_T2   0x28
#define OFFSET_T3   0x2c
#define OFFSET_T4   0x30
#define OFFSET_T5   0x34
#define OFFSET_T6   0x38
#define OFFSET_T7   0x3c
#define OFFSET_S0   0x40
#define OFFSET_S1   0x44
#define OFFSET_S2   0x48
#define OFFSET_S3   0x4c
#define OFFSET_S4   0x50
#define OFFSET_S5   0x54
#define OFFSET_S6   0x58
#define OFFSET_S7   0x5c
#define OFFSET_T8   0x60
#define OFFSET_T9   0x64
#define OFFSET_K0   0x68
#define OFFSET_K1   0x6c
#define OFFSET_GP   0x70
#define OFFSET_FP   0x74
#define OFFSET_SP   0x78
#define OFFSET_RA   0x7c

Special registers

#define OFFSET_LO   0x80
#define OFFSET_HI   0x84

System registers

#define OFFSET_EPC   0x88
#define OFFSET_CAUSE   0x8c
#define OFFSET_BADVADDR   0x90
#define OFFSET_STATUS   0x94

Defines

#define EX_STACK_FRAME   (32*4 + 2*4 + 3*4 + 1*4)
 Context frame size Context frame size. The calculation is : general registers - 32*4, Lo and Hi - 2*4, Status, BadVAddr and Cause - 3*4, Return address - 1*4.


Detailed Description

Relative addresses of registers.

Relative addresses of registers as they are stored on the stack. Add these constants to the context top to address concrete register.

This file is usable to include into the C source code as well as into the assembler code.

Note that registers K0, K1 and SP are not stored.


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