Arch/ABI Instruction System# Ret1 Ret2
arm/OABI swi NR - r0 -
arm/EABI swi 0x0 r7 r0 r1
arm64 svc #0 w8 x0 x1
i386 int $0x80 eax eax edx
riscv ecall a7 a0 a1
x86-64 syscall rax rax rdx
x32 syscall rax rax rdx
Arch/ABI arg1 arg2 arg3 arg4 arg5 arg6 arg7 Notes
arm/OABI r0 r1 r2 r3 r4 r5 r6
arm/EABI r0 r1 r2 r3 r4 r5 r6
arm64 x0 x1 x2 x3 x4 x5 -
i386 ebx ecx edx esi edi ebp -
riscv a0 a1 a2 a3 a4 a5 -
x86-64 rdi rsi rdx r10 r8 r9 -
x32 rdi rsi rdx r10 r8 r9 -
Arch/ABI a0 a1 a2 a3 a4 a5 ret1 ret2 caller
x86-64 rdi rsi rdx rcx r8 r9 rax rdx rbx,rsp,rbp