cpu_context Struct Reference

#include <scheduler.h>

Data Fields
uint64_t	x19
uint64_t	x20
uint64_t	x21
uint64_t	x22
uint64_t	x23
uint64_t	x24
uint64_t	x25
uint64_t	x26
uint64_t	x27
uint64_t	x28
uint64_t	fp
uint64_t	sp
uint64_t	pc

Detailed Description

Structure that contains values of all registers that might be different between the tasks, that are being switched.

Note

For aarch64: We don't save registers x0 - x18 becuase they can be overwritten by the called function, so the caller must not assume that the values of those registers will survive after a function call.
For aarch32: We don't save register r12 because it is a caller-save register, so its value need not be preserved.

Field Documentation

fp

uint64_t cpu_context::fp

Fram Pointer: 64-bit register X29 (Callee-saved)

pc

uint64_t cpu_context::pc

Program Counter

sp

uint64_t cpu_context::sp

Stack Pointer

x19

uint64_t cpu_context::x19

General Purpose 64-bit register X19 (Callee-saved)

x20

uint64_t cpu_context::x20

General Purpose 64-bit register X20 (Callee-saved)

x21

uint64_t cpu_context::x21

General Purpose 64-bit register X21 (Callee-saved)

x22

uint64_t cpu_context::x22

General Purpose 64-bit register X22 (Callee-saved)

x23

uint64_t cpu_context::x23

General Purpose 64-bit register X23 (Callee-saved)

x24

uint64_t cpu_context::x24

General Purpose 64-bit register X24 (Callee-saved)

x25

uint64_t cpu_context::x25

General Purpose 64-bit register X25 (Callee-saved)

x26

uint64_t cpu_context::x26

General Purpose 64-bit register X26 (Callee-saved)

x27

uint64_t cpu_context::x27

General Purpose 64-bit register X27 (Callee-saved)

x28

uint64_t cpu_context::x28

General Purpose 64-bit register X28 (Callee-saved)

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The documentation for this struct was generated from the following file:

• include/kernel/scheduler.h