Function at 0x421440
Capabilities:
Reference http user-agent string

Disassembly:
lea r12, [rsp - 8]
cmp r12, qword [r14 + 0x10]
jbe 0x42170d
push rbp
mov rbp, rsp
add rsp, 0xffffffffffffff80
prefetcht0 byte [rax]
movabs rdx, 0x800000000000
add rdx, rax
mov rsi, rdx
shr rdx, 0x2a
nop
nop
cmp rdx, 0x40
jae 0x4216ff
lea rdi, [0x0091e178]
mov rdx, qword [rdi + rdx*8]
test byte [rdx], al
mov rdi, rax
shr rax, 0xd
and eax, 0x1ff
shr rsi, 0x16
and esi, 0xfffff
mov rdx, qword [rdx + rsi*8]
test byte [rdx], al
mov rax, qword [rdx + rax*8]
mov rdx, qword [rax + 0x68]
test rdx, rdx
je 0x4216ee
movzx esi, byte [rax + 0x62]
nop dword [rax + rax]
test sil, 1
jne 0x4216dd
mov qword [rsp + 0x70], rdi
mov qword [rsp + 0x98], rbx
nop word [rax + rax]
cmp rdx, 0x20000
jbe 0x421505
cmp qword [rax + 0x18], rdi
jne 0x421616
mov qword [rsp + 0x30], rax
lea rdx, [rdi + 0x20000]
nop
jmp 0x421676
mov qword [rsp + 0x60], rdx
mov rbx, rdi
call sym.runtime._mspan_.typePointersOfUnchecked
mov rdx, qword [rsp + 0x60]
mov qword [rsp + 0x60], rdx
mov r8, qword [rsp + 0x70]
xor esi, esi
jmp 0x421529
lea rsi, [r10 + 8]
test rcx, rcx
jne 0x421533
xor r9d, r9d
jmp 0x421540
bsf r9, rcx
btc rcx, r9
lea r9, [rbx + r9*8]
nop
test r9, r9
jne 0x421569
mov qword [rsp + 0x50], rsi
lea rsi, [r8 + rdx]
call sym.runtime.typePointers.next
test rsi, rsi
je 0x4215f6
mov rdx, qword [rsp + 0x60]
mov r8, qword [rsp + 0x70]
mov r9, rsi
mov r10, r9
mov r9, qword [r9]
sub r10, r8
test r9, r9
je 0x421525
mov r11, r9
sub r9, r8
nop dword [rax]
cmp rdx, r9
ja 0x421525
mov qword [rsp + 0x40], rax
mov qword [rsp + 0x68], r10
mov qword [rsp + 0x78], rdi
mov qword [rsp + 0x38], rcx
mov qword [rsp + 0x48], rbx
mov rax, r11
mov rbx, r8
mov rcx, r10
call sym.runtime.findObject
test rax, rax
je 0x4215ce
mov rdi, rbx
mov rsi, qword [rsp + 0x98]
mov r8, rcx
mov rbx, qword [rsp + 0x70]
mov rcx, qword [rsp + 0x68]
call sym.runtime.greyobject
mov rax, qword [rsp + 0x40]
mov rcx, qword [rsp + 0x38]
mov rdx, qword [rsp + 0x60]
mov rbx, qword [rsp + 0x48]
mov rdi, qword [rsp + 0x78]
mov r8, qword [rsp + 0x70]
mov r10, qword [rsp + 0x68]
jmp 0x421525
mov rax, qword [rsp + 0x60]
mov rcx, qword [rsp + 0x98]
add qword [rcx + 0x10], rax
mov rax, qword [rsp + 0x50]
add qword [rcx + 0x18], rax
sub rsp, 0xffffffffffffff80
pop rbp
ret
mov rcx, qword [rax + 0x68]
mov rbx, qword [rax + 0x18]
add rcx, rbx
sub rcx, rdi
mov qword [rsp + 0x60], rcx
call sym.runtime._mspan_.typePointersOfUnchecked
mov rsi, qword [rsp + 0x70]
mov rdx, rsi
sub rdx, rbx
mov r8, qword [rsp + 0x60]
cmp r8, 0x20000
mov r9d, 0x20000
cmova r8, r9
mov qword [rsp + 0x60], r8
lea r9, [r8 + rsi]
mov rsi, rdx
mov r8, r9
nop
call sym.runtime.typePointers.fastForward
mov rdx, qword [rsp + 0x60]
jmp 0x421517
add rdx, 0x20000
mov rsi, qword [rax + 0x68]
add rsi, qword [rax + 0x18]
nop
cmp rdx, rsi
jae 0x421616
mov rsi, qword [rbx]
test rsi, rsi
je 0x4216a7
mov r8, qword [rsi + 0x10]
cmp r8, 0xfd
je 0x4216a7
jae 0x4216d0
mov qword [rsi + r8*8 + 0x18], rdx
inc qword [rsi + 0x10]
jmp 0x42166f
mov qword [rsp + 0x58], rdx
mov rax, rbx
mov rbx, rdx
call sym.runtime._gcWork_.put
mov rax, qword [rsp + 0x30]
mov rdx, qword [rsp + 0x58]
mov rbx, qword [rsp + 0x98]
mov rdi, qword [rsp + 0x70]
jmp 0x42166f
mov rax, r8
mov ecx, 0xfd
call sym.runtime.panicIndex
lea rax, [0x006db879]
mov ebx, 0x1d
call sym.runtime.throw
lea rax, [0x006d4ae7]
mov ebx, 0x11
call sym.runtime.throw
mov rax, rdx
mov ecx, 0x40
call sym.runtime.panicIndexU
nop
mov qword [rsp + 8], rax
mov qword [rsp + 0x10], rbx
call sym.runtime.morestack_noctxt.abi0
mov rax, qword [rsp + 8]
mov rbx, qword [rsp + 0x10]
jmp sym.runtime.scanobject