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Kernel: Add alignment specifier to aarch64 register definitions

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When disabling UBSAN, the compiler would complain that the constraints
of the inline assembly could not be met. By adding the alignas specifier
the compiler can now determine that the struct can be passed into a
register, and thus the constraints are met.
This commit is contained in:
Timon Kruiper 2022-05-10 20:23:38 +02:00 • committed by Linus Groh
parent b35293d945
commit 9f730fab8d
1 changed files with 9 additions and 8 deletions
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17
Kernel/Arch/aarch64/Registers.h
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@ -14,7 +14,7 @@ namespace Kernel::Aarch64 {
// https://developer.arm.com/documentation/ddi0595/2021-06/AArch64-Registers/ID-AA64MMFR0-EL1--AArch64-Memory-Model-Feature-Register-0
// Memory Model Feature Register 0
struct ID_AA64MMFR0_EL1 {
struct alignas(u64) ID_AA64MMFR0_EL1 {
int PARange : 4;
int ASIDBits : 4;
int BigEnd : 4;
@ -41,10 +41,11 @@ struct ID_AA64MMFR0_EL1 {
return feature_register;
}
};
static_assert(sizeof(ID_AA64MMFR0_EL1) == 8);
// https://developer.arm.com/documentation/ddi0595/2021-06/AArch64-Registers/TCR-EL1--Translation-Control-Register--EL1-
// Translation Control Register
struct TCR_EL1 {
struct alignas(u64) TCR_EL1 {
enum Shareability {
NonSharable = 0b00,
@ -155,7 +156,7 @@ static_assert(sizeof(TCR_EL1) == 8);
// https://developer.arm.com/documentation/ddi0595/2021-03/AArch64-Registers/SCTLR-EL1--System-Control-Register--EL1-
// System Control Register
struct SCTLR_EL1 {
struct alignas(u64) SCTLR_EL1 {
int M : 1;
int A : 1;
int C : 1;
@ -235,7 +236,7 @@ static_assert(sizeof(SCTLR_EL1) == 8);
// https://developer.arm.com/documentation/ddi0595/2021-06/AArch64-Registers/HCR-EL2--Hypervisor-Configuration-Register
// Hypervisor Configuration Register
struct HCR_EL2 {
struct alignas(u64) HCR_EL2 {
int VM : 1;
int SWIO : 1;
int PTW : 1;
@ -300,7 +301,7 @@ static_assert(sizeof(HCR_EL2) == 8);
// https://developer.arm.com/documentation/ddi0595/2021-06/AArch64-Registers/SCR-EL3--Secure-Configuration-Register
// Secure Configuration Register
struct SCR_EL3 {
struct alignas(u64) SCR_EL3 {
int NS : 1;
int IRQ : 1;
int FIQ : 1;
@ -354,7 +355,7 @@ struct SCR_EL3 {
};
static_assert(sizeof(SCR_EL3) == 8);
struct SPSR_EL2 {
struct alignas(u64) SPSR_EL2 {
enum Mode : u16 {
EL0t = 0b0000,
EL1t = 0b0100,
@ -405,7 +406,7 @@ static_assert(sizeof(SPSR_EL2) == 8);
// https://developer.arm.com/documentation/ddi0595/2021-06/AArch64-Registers/SPSR-EL3--Saved-Program-Status-Register--EL3-
// Saved Program Status Register
struct SPSR_EL3 {
struct alignas(u64) SPSR_EL3 {
enum Mode : uint16_t {
EL0t = 0b0000,
EL1t = 0b0100,
@ -454,7 +455,7 @@ static_assert(sizeof(SPSR_EL3) == 8);
// https://developer.arm.com/documentation/ddi0595/2020-12/AArch64-Registers/MAIR-EL1--Memory-Attribute-Indirection-Register--EL1-?lang=en#fieldset_0-63_0
// Memory Attribute Indirection Register
struct MAIR_EL1 {
struct alignas(u64) MAIR_EL1 {
using AttributeEncoding = uint8_t;
AttributeEncoding Attr[8];