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function _stp_bpf_syscall_get_nr:long(regs:long)
{
return @choose_defined( @cast(regs, "struct pt_regs", "kernel")->orig_ax, // STAPCONF_X86_UNIREGS
@choose_defined(@cast(regs, "struct pt_regs", "kernel")->orig_rax, // __x86_64__
@choose_defined(@cast(regs, "struct pt_regs", "kernel")->orig_eax, // __i386__
@choose_defined(@cast(regs, "struct pt_regs", "kernel")->ARM_r7, // __arm__
@choose_defined(@cast(regs, "struct pt_regs", "kernel")->regs[2], //__mips__
@choose_defined(@cast(regs, "struct pt_regs", "kernel")->gpr[0], //__powerpc__
@choose_defined(@cast(regs, "struct pt_regs", "kernel")->gprs[2], // __s390__ || __s390x__
@choose_defined(@cast(regs, "struct pt_regs", "kernel")->syscallno, // __aarch64__
@cast(regs, "struct pt_regs", "kernel")->a7)))))))); // __riscv__
}