Legacy Document

Inside Macintosh: PowerPC System Software /

Chapter 4 - Exception Manager / Exception Manager Reference

Data Structures

Register Information Records

The Exception Manager uses a register information record to encode the state of the general-purpose registers at the time an exception occurs. A register information record is defined by the RegisterInformation data type.

struct RegisterInformation {
   UnsignedWide         R0;
   UnsignedWide         R1;
   UnsignedWide         R2;
   UnsignedWide         R3;
   UnsignedWide         R4;
   UnsignedWide         R5;
   UnsignedWide         R6;
   UnsignedWide         R7;
   UnsignedWide         R8;
   UnsignedWide         R9;
   UnsignedWide         R10;
   UnsignedWide         R11;
   UnsignedWide         R12;
   UnsignedWide         R13;
   UnsignedWide         R14;
   UnsignedWide         R15;
   UnsignedWide         R16;
   UnsignedWide         R17;
   UnsignedWide         R18;
   UnsignedWide         R19;
   UnsignedWide         R20;
   UnsignedWide         R21;
   UnsignedWide         R22;
   UnsignedWide         R23;
   UnsignedWide         R24;
   UnsignedWide         R25;
   UnsignedWide         R26;
   UnsignedWide         R27;
   UnsignedWide         R28;
   UnsignedWide         R29;
   UnsignedWide         R30;
   UnsignedWide         R31;
};
typedef struct RegisterInformation RegisterInformation;

Field Description

R0

The contents of general-purpose register GPR0.

R1

The contents of general-purpose register GPR1.

R2

The contents of general-purpose register GPR2.

R3

The contents of general-purpose register GPR3.

R4

The contents of general-purpose register GPR4.

R5

The contents of general-purpose register GPR5.

R6

The contents of general-purpose register GPR6.

R7

The contents of general-purpose register GPR7.

R8

The contents of general-purpose register GPR8.

R9

The contents of general-purpose register GPR9.

R10

The contents of general-purpose register GPR10.

R11

The contents of general-purpose register GPR11.

R12

The contents of general-purpose register GPR12.

R13

The contents of general-purpose register GPR13.

R14

The contents of general-purpose register GPR14.

R15

The contents of general-purpose register GPR15.

R16

The contents of general-purpose register GPR16.

R17

The contents of general-purpose register GPR17.

R18

The contents of general-purpose register GPR18.

R19

The contents of general-purpose register GPR19.

R20

The contents of general-purpose register GPR20.

R21

The contents of general-purpose register GPR21.

R22

The contents of general-purpose register GPR22.

R23

The contents of general-purpose register GPR23.

R24

The contents of general-purpose register GPR24.

R25

The contents of general-purpose register GPR25.

R26

The contents of general-purpose register GPR26.

R27

The contents of general-purpose register GPR27.

R28

The contents of general-purpose register GPR28.

R29

The contents of general-purpose register GPR29.

R30

The contents of general-purpose register GPR30.

R31

The contents of general-purpose register GPR31.

IMPORTANT

The fields of a register information record are aligned in memory
in accordance with 680x0 alignment conventions.