RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 05:27:45 +00:00
Code Issues Activity Actions

Kernel: Detect syscall/sysenter support

Browse source
This commit is contained in:
Tom 2020-07-07 19:23:38 -06:00 • committed by Andreas Kling
parent 5b6920a18a
commit ce5ae83963
2 changed files with 25 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

11
Kernel/Arch/i386/CPU.h
View file

@ -599,7 +599,9 @@ enum class CPUFeature : u32 {
SMEP = (1 << 6),
SSE = (1 << 7),
TSC = (1 << 8),
UMIP = (1 << 9)
UMIP = (1 << 9),
SEP = (1 << 10),
SYSCALL = (1 << 11)
};
class Thread;
@ -613,6 +615,13 @@ struct TrapFrame;
#define GDT_SELECTOR_PROC 0x30
#define GDT_SELECTOR_TSS 0x38
// SYSENTER makes certain assumptions on how the GDT is structured:
static_assert(GDT_SELECTOR_CODE0 + 8 == GDT_SELECTOR_DATA0); // SS0 = CS0 + 8
// SYSEXIT makes certain assumptions on how the GDT is structured:
static_assert(GDT_SELECTOR_CODE0 + 16 == GDT_SELECTOR_CODE3); // CS3 = CS0 + 16
static_assert(GDT_SELECTOR_CODE0 + 24 == GDT_SELECTOR_DATA3); // SS3 = CS0 + 32
class ProcessorInfo;
struct MemoryManagerData;
struct ProcessorMessageEntry;