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23 lines
783 B
ArmAsm
23 lines
783 B
ArmAsm
/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */
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.global musl_glibc_longjmp
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.type musl_glibc_longjmp,@function
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musl_glibc_longjmp:
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mov 0x30(%rdi),%r8
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mov 0x8(%rdi),%r9
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mov 0x38(%rdi),%rdx
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ror $0x11,%r8
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xor %fs:0x30,%r8 /* this ends up being the stack pointer */
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ror $0x11,%r9
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xor %fs:0x30,%r9
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ror $0x11,%rdx
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xor %fs:0x30,%rdx /* this is the instruction pointer */
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mov (%rdi),%rbx /* rdi is the jmp_buf, restore regs from it */
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mov 0x10(%rdi),%r12
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mov 0x18(%rdi),%r13
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mov 0x20(%rdi),%r14
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mov 0x28(%rdi),%r15
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mov %esi,%eax
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mov %r8,%rsp
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mov %r9,%rbp
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jmpq *%rdx /* goto saved address without altering rsp */
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