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Kernel: optimize yielding

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Doing a yield no longer raises a software interrupt. Instead it just
saves all the callee saved registers, ip, sp and return value. Because
yield is only called in the kernel, it can just restore registers and
jump to the target address. There is never a need to use iret :)
This commit is contained in:
Bananymous
2026-01-11 01:31:09 +02:00
parent 83e5cb81e8
commit 35c97e2ff8
13 changed files with 109 additions and 118 deletions
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10
kernel/arch/x86_64/interrupts.S
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@@ -71,16 +71,6 @@ irq_stub:
addq $16, %rsp
iretq
.global asm_yield_handler
asm_yield_handler:
pushaq 8
cld
leaq 120(%rsp), %rdi # interrupt stack ptr
movq %rsp, %rsi # interrupt register ptr
call cpp_yield_handler
popaq 8
iretq
.global asm_ipi_handler
asm_ipi_handler:
pushaq 8