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Kernel: Clear DF on every interrupt handler

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I was missing this and it lead to UB with my new mem* functions that
were implemented with `rep`
This commit is contained in:
Bananymous
2025-01-17 16:11:13 +02:00
parent 03b5c8e76e
commit 34775633b2
4 changed files with 12 additions and 1 deletions
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1
kernel/arch/x86_64/Syscall.S
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@@ -16,6 +16,7 @@ asm_syscall_handler:
pushq %r13
pushq %r14
pushq %r15
cld
movq %rsi, %r8
movq %rdi, %r9

6
kernel/arch/x86_64/interrupts.S
View File

@@ -36,7 +36,7 @@
isr_stub:
pushaq
cld
movq %cr0, %rax; pushq %rax
movq %cr2, %rax; pushq %rax
movq %cr3, %rax; pushq %rax
@@ -55,6 +55,7 @@ isr_stub:
irq_stub:
pushaq
cld
movq 120(%rsp), %rdi # irq number
call cpp_irq_handler
popaq
@@ -64,6 +65,7 @@ irq_stub:
.global asm_yield_handler
asm_yield_handler:
pushaq
cld
leaq 120(%rsp), %rdi # interrupt stack ptr
movq %rsp, %rsi # interrupt register ptr
call cpp_yield_handler
@@ -73,6 +75,7 @@ asm_yield_handler:
.global asm_ipi_handler
asm_ipi_handler:
pushaq
cld
call cpp_ipi_handler
popaq
iretq
@@ -80,6 +83,7 @@ asm_ipi_handler:
.global asm_timer_handler
asm_timer_handler:
pushaq
cld
call cpp_timer_handler
popaq
iretq