forked from Bananymous/banan-os
66 lines
802 B
ArmAsm
66 lines
802 B
ArmAsm
.section .userspace, "ax"
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// stack contains
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// return address
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// signal number
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// signal handler
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.global signal_trampoline
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signal_trampoline:
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pushq %rax
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pushq %rbx
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pushq %rcx
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pushq %rdx
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pushq %rbp
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pushq %rdi
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pushq %rsi
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pushq %r8
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pushq %r9
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pushq %r10
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pushq %r11
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pushq %r12
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pushq %r13
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pushq %r14
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pushq %r15
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movq 128(%rsp), %rdi
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movq 120(%rsp), %rax
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// align stack to 16 bytes
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movq %rsp, %rbp
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andq $-16, %rsp
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subq $512, %rsp
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fxsave64 (%rsp)
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call *%rax
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fxrstor64 (%rsp)
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addq $512, %rsp
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// restore stack
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movq %rbp, %rsp
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popq %r15
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popq %r14
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popq %r13
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popq %r12
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popq %r11
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popq %r10
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popq %r9
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popq %r8
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popq %rsi
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popq %rdi
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popq %rbp
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popq %rdx
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popq %rcx
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popq %rbx
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popq %rax
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addq $16, %rsp
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popfq
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movq (%rsp), %rsp
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// return over red-zone
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ret $128
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