calling_convention.txt - Android社区 - https://www.androidos.net.cn/

Nougat 7.0 | 7.0.0_r31

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Register Usage
rax      temporary register; with variable arguments passes information
         about the number of SSE registers used; 1st return register

rbx*     callee-saved register; optionally used as base pointer

rcx      used to pass 4th integer argument to functions

rdx      used to pass 3rd argument to functions 2nd return register

rsp*     stack pointer

rbp*     callee-saved register; optionally used as frame pointer

rsi      used to pass 2nd argument to functions

rdi      used to pass 1st argument to functions

r8       used to pass 5th argument to functions

r9       used to pass 6th argument to functions

r10      temporary register, used for passing a function's static chain pointer

r11      temporary register

r12-15*  callee-saved registers

xmm0�1   used to pass and return floating point arguments

xmm2�7   used to pass floating point arguments

xmm8�15  temporary registers

mmx0�7   temporary registers

st0      temporary register; used to return long double arguments

st1      temporary registers; used to return long double arguments

st2�7    temporary registers

fs       Reserved for system use (as thread specific data register)

*) must be preserved across function calls

Integer arguments from list: rdi,rsi,rdx,rcx,r8,r9,stack
Floating point arguments from list: xmm0-xmm7

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