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Kernel: Make separate kernel entry points for each PIC IRQ

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Instead of having a common entry point and looking at the PIC ISR to
figure out which IRQ we're servicing, just make a separate entryway
for each IRQ that pushes the IRQ number and jumps to a common routine.

This fixes a weird issue where incoming network packets would sometimes
cause the mouse to stop working. I didn't track it down further than
realizing we were sometimes EOI'ing the wrong IRQ.
This commit is contained in:
Andreas Kling 2019-12-15 12:11:39 +01:00
parent 12cc518d1e
commit f01fd54d1b
4 changed files with 123 additions and 129 deletions
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31
Kernel/Syscall.cpp
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@ -12,26 +12,21 @@ asm(
"syscall_asm_entry:\n"
" pushl $0x0\n"
" pusha\n"
" pushw %ds\n"
" pushw %es\n"
" pushw %fs\n"
" pushw %gs\n"
" pushw %ss\n"
" pushw %ss\n"
" pushw %ss\n"
" pushw %ss\n"
" pushw %ss\n"
" popw %ds\n"
" popw %es\n"
" popw %fs\n"
" popw %gs\n"
" pushl %ds\n"
" pushl %es\n"
" pushl %fs\n"
" pushl %gs\n"
" pushl %ss\n"
" mov $0x10, %ax\n"
" mov %ax, %ds\n"
" mov %ax, %es\n"
" cld\n"
" call syscall_handler\n"
" popw %gs\n"
" popw %gs\n"
" popw %fs\n"
" popw %es\n"
" popw %ds\n"
" add $0x4, %esp\n"
" popl %gs\n"
" popl %fs\n"
" popl %es\n"
" popl %ds\n"
" popa\n"
" add $0x4, %esp\n"
" iret\n");