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Fix user apps randomly crashing (APIC, GDT layout, syscall entry)
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Kamil Kowalczyk
2026-01-14 19:51:18 +01:00
parent 0d8f9e565f
commit d1d772cb42
23 changed files with 276 additions and 204 deletions
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19
kernel/amd64/syscallentry.S
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@@ -4,39 +4,40 @@
.global amd64_syscall_entry
amd64_syscall_entry:
cli
movq %rsp, %gs:0
movq %gs:8, %rsp
pushq $0x23
pushq $0x1b
pushq %gs:0
pushq %r11
pushq $0x1b
pushq $0x23
pushq %rcx
pushq $0
pushq $0
push_regs
movw $0x10, %ax
movw %ax, %ds
movw %ax, %es
movw %ax, %ss
cld
movq %rsp, %rdi
movq %cr3, %rax
pushq %rax
movq %cr3, %rax; pushq %rax
movq %rsp, %rbp
subq $8, %rsp
andq $~0xF, %rsp
andq $-16, %rsp
callq amd64_syscall_dispatch
movq %rbp, %rsp
popq %rax
movq %rax, %cr3
popq %rax; movq %rax, %cr3
pop_regs_skip_rax