94 lines
1.2 KiB
ArmAsm
94 lines
1.2 KiB
ArmAsm
.code64
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.extern THREAD_sp
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.global ml_thread_switch
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.type ml_thread_switch, @function
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// %rdi = (struct thread *) current thread.
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// %rsi = (struct thread *) next thread.
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ml_thread_switch:
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pushfq
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push %rax
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push %rcx
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push %rdx
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// set fs-base
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mov $0xC0000100, %rcx
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movq THREAD_fsbase(%rsi), %rax
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movq THREAD_fsbase(%rsi), %rdx
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shr $32, %rdx
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wrmsr
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// set (kernel) gs-base (it will be swapped back into user-gs-base at
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// the end of this function)
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mov $0xC0000102, %rcx
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movq THREAD_gsbase(%rsi), %rax
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movq THREAD_gsbase(%rsi), %rdx
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shr $32, %rdx
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wrmsr
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push %rbx
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pushq $0
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push %rbp
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push %rsi
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push %rdi
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push %r8
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push %r9
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push %r10
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push %r11
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push %r12
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push %r13
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push %r14
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push %r15
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movq %rsp, THREAD_sp(%rdi)
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movq THREAD_sp(%rsi), %rsp
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pop %r15
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pop %r14
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pop %r13
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pop %r12
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pop %r11
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pop %r10
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pop %r9
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pop %r8
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pop %rdi
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pop %rsi
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pop %rbp
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add $8, %rsp
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pop %rbx
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pop %rdx
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pop %rcx
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pop %rax
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popfq
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ret
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.global ml_thread_switch_user
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.type ml_thread_switch_user, @function
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ml_thread_switch_user:
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pop %r15
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pop %r14
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pop %r13
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pop %r12
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pop %r11
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pop %r10
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pop %r9
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pop %r8
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pop %rdi
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pop %rsi
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pop %rbp
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add $8, %rsp
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pop %rbx
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pop %rdx
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pop %rcx
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pop %rax
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add $16, %rsp
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swapgs
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iretq
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