forked from Bananymous/banan-os
59 lines
974 B
ArmAsm
59 lines
974 B
ArmAsm
// jmp_buf: rsp, rip, rbx, rbp, r12-r15
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// int setjmp(jmp_buf env)
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.global setjmp
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setjmp:
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leaq 8(%rsp), %rax
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movq %rax, 0(%rdi)
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movq (%rsp), %rax
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movq %rax, 8(%rdi)
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movq %rbx, 16(%rdi)
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movq %rbp, 24(%rdi)
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movq %r12, 32(%rdi)
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movq %r13, 40(%rdi)
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movq %r14, 48(%rdi)
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movq %r15, 56(%rdi)
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xorq %rax, %rax
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ret
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.size setjmp, . - setjmp
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// void longjmp(jmp_buf env, int val)
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.global longjmp
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longjmp:
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movq $1, %rax
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testq %rsi, %rsi
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cmovnzq %rsi, %rax
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movq 0(%rdi), %rsp
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movq 8(%rdi), %rcx
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movq 16(%rdi), %rbx
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movq 24(%rdi), %rbp
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movq 32(%rdi), %r12
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movq 40(%rdi), %r13
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movq 48(%rdi), %r14
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movq 56(%rdi), %r15
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jmp *%rcx
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.size longjmp, . - longjmp
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// int sigsetjmp(sigjmp_buf env, int savemask)
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.global sigsetjmp
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sigsetjmp:
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movq %rsi, 64(%rdi)
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testq %rsi, %rsi
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jz setjmp
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subq $8, %rsp
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movq %rdi, (%rsp)
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leaq 72(%rdi), %rdx
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xorq %rsi, %rsi
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call pthread_sigmask
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movq (%rsp), %rdi
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addq $8, %rsp
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jmp setjmp
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.size sigsetjmp, . - sigsetjmp
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