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Kernel: Don't read CR registers on every exception

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Bananymous
2026-06-26 01:39:57 +03:00
parent 59ec05c898
commit 2bb9b9b4b3
8 changed files with 94 additions and 33 deletions
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12
kernel/arch/i686/interrupts.S
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@@ -27,14 +27,10 @@
isr_stub:
intr_header 12
movl %cr0, %eax; pushl %eax
movl %cr2, %eax; pushl %eax
movl %cr3, %eax; pushl %eax
movl %cr4, %eax; pushl %eax
movl 48(%esp), %edi // isr number
movl 52(%esp), %esi // error code
leal 56(%esp), %edx // interrupt stack ptr
movl 32(%esp), %edi // isr number
movl 36(%esp), %esi // error code
leal 40(%esp), %edx // interrupt stack ptr
movl %esp, %ecx // register ptr
# stack frame for stack trace
@@ -52,7 +48,7 @@ isr_stub:
call cpp_isr_handler
movl %ebp, %esp
addl $24, %esp
addl $8, %esp
intr_footer 12
addl $8, %esp

13
kernel/arch/x86_64/interrupts.S
View File

@@ -44,17 +44,12 @@
isr_stub:
intr_header 24
movq %cr0, %rax; pushq %rax
movq %cr2, %rax; pushq %rax
movq %cr3, %rax; pushq %rax
movq %cr4, %rax; pushq %rax
movq 152(%rsp), %rdi // isr number
movq 160(%rsp), %rsi // error code
leaq 168(%rsp), %rdx // interrupt stack ptr
movq %rsp, %rcx // register ptr
movq 120(%rsp), %rdi // isr number
movq 128(%rsp), %rsi // error code
leaq 136(%rsp), %rdx // interrupt stack ptr
movq %rsp, %rcx // register ptr
call cpp_isr_handler
addq $32, %rsp
intr_footer 24
addq $16, %rsp