// distinguished by the mapping name for the kernel image:
		// '[kernel.kallsyms]_text' or '[kernel.kallsyms]_stext', respectively. If we haven't
		// been able to parse it from the mapping, we default to _stext.
		if relocationSymbol == "" {
			relocationSymbol = "_stext"
		}
		for _, s := range symbols {
			if s.Name == relocationSymbol {
				kernelOffset = &s.Value
				break
			}
		}
	}

	// NOTE(rsc): It seems strange to set the buffer to have
	// size CTL_MAXNAME+2 but use only CTL_MAXNAME
	// as the size. I don't know why the +2 is here, but the
	// kernel uses +2 for its own implementation of this function.
	// I am scared that if we don't include the +2 here, the kernel
	// will silently write 2 words farther than we specify
	// and we'll get memory corruption.
	var buf [CTL_MAXNAME + 2]_C_int
	n := uintptr(CTL_MAXNAME) * siz

	// Open opens the named object file. If the object is a shared
	// library, start/limit/offset are the addresses where it is mapped
	// into memory in the address space being inspected. If the object
	// is a linux kernel, relocationSymbol is the name of the symbol
	// corresponding to the start address.
	Open(file string, start, limit, offset uint64, relocationSymbol string) (ObjFile, error)

	printerNormalizeNumbers = 1 << 30
)

// fdSem guards the number of concurrently-open file descriptors.
//
// For now, this is arbitrarily set to 200, based on the observation that many
// platforms default to a kernel limit of 256. Ideally, perhaps we should derive
// it from rlimit on platforms that support that system call.
//
// File descriptors opened from outside of this package are not tracked,
// so this limit may be approximate.

//	addr := &SockaddrCAN{Ifindex: index}
//	Bind(fd, addr)
//	frame := make([]byte, 16)
//	Read(fd, frame)
//
// The full SocketCAN documentation can be found in the linux kernel
// archives at: https://www.kernel.org/doc/Documentation/networking/can.txt
type SockaddrCAN struct {
	Ifindex int
	RxID    uint32
	TxID    uint32
	raw     RawSockaddrCAN
}

			mappingIds[m.ID] = m
		} else {
			mappings[m.ID] = m
		}

		// If this a main linux kernel mapping with a relocation symbol suffix
		// ("[kernel.kallsyms]_text"), extract said suffix.
		// It is fairly hacky to handle at this level, but the alternatives appear even worse.
		const prefix = "[kernel.kallsyms]"
		if strings.HasPrefix(m.File, prefix) {
			m.KernelRelocationSymbol = m.File[len(prefix):]
		}
	}

	fileX    int64
	buildIDX int64

	// Name of the kernel relocation symbol ("_text" or "_stext"), extracted from File.
	// For linux kernel mappings generated by some tools, correct symbolization depends
	// on knowing which of the two possible relocation symbols was used for `Start`.
	// This is given to us as a suffix in `File` (e.g. "[kernel.kallsyms]_stext").
	//

	// proprietary sections like __apple_types.
	compressedSects, compressedBytes, err := machoCompressSections(ctxt, dwarfm)
	if err != nil {
		return err
	}

	// Now copy the dwarf data into the output.
	// Kernel requires all loaded segments to be page-aligned in the file,
	// even though we mark this one as being 0 bytes of virtual address space.
	dwarfstart := Rnd(int64(linkseg.Offset), *FlagRound)

			o2 = OP_RRR(c.oprrr(AADDVU), REGSB, p.To.Reg, p.To.Reg)
			rel2.Off += 4
		}

	case 53: /* mov r, tlsvar ==> rdhwr + sw o(r3) */
		// clobbers R3 !
		// load thread pointer with RDHWR, R3 is used for fast kernel emulation on Linux
		// NOTE: this case does not use REGTMP. If it ever does,
		// remove the NOTUSETMP flag in optab.
		o1 = (037<<26 + 073) | (29 << 11) | (3 << 16) // rdhwr $29, r3

		// Go cannot make sure non odd-number-fpr is used (ie, in load a double from memory).
		// So, we mark the object is MIPS I style paired float/double register scheme,
		// aka MIPS_FPABI_ANY. If we mark the object as FPXX, the kernel may use FR=1 mode,
		// then we meet some problem.
		// Note: MIPS_FPABI_ANY is bad naming: in fact it is MIPS I style FPR usage.
		//       It is not for 'ANY'.