gp_gp      uint64
	gp_tp      uint64
	gp_t       [7]uint64
	gp_s       [12]uint64
	gp_a       [8]uint64
	gp_sepc    uint64
	gp_sstatus uint64
}

type fpregs struct {
	fp_x     [64]uint64 // actually __uint64_t fp_x[32][2]
	fp_fcsr  uint64
	fp_flags int32
	pad      int32
}

type mcontext struct {
	mc_gpregs gpregs
	mc_fpregs fpregs
	mc_flags  int32
	mc_pad    int32

	si_uid    uint32
	si_status int32
	si_addr   uint64
	si_value  [8]byte
	_reason   [40]byte
}

type gpregs struct {
	gp_x    [30]uint64
	gp_lr   uint64
	gp_sp   uint64
	gp_elr  uint64
	gp_spsr uint32
	gp_pad  int32
}

type fpregs struct {
	fp_q     [64]uint64 // actually [32]uint128
	fp_sr    uint32
	fp_cr    uint32
	fp_flags int32
	fp_pad   int32
}

func (c *sigctxt) r7() uint64  { return c.regs().mc_gpregs.gp_x[7] }
func (c *sigctxt) r8() uint64  { return c.regs().mc_gpregs.gp_x[8] }
func (c *sigctxt) r9() uint64  { return c.regs().mc_gpregs.gp_x[9] }
func (c *sigctxt) r10() uint64 { return c.regs().mc_gpregs.gp_x[10] }
func (c *sigctxt) r11() uint64 { return c.regs().mc_gpregs.gp_x[11] }
func (c *sigctxt) r12() uint64 { return c.regs().mc_gpregs.gp_x[12] }

			{".strtab", SHT_STRTAB, 0x0, 0x0, 0x1468, 0x206, 0x0, 0x0, 0x1, 0x0, 0x206},
		},
		[]ProgHeader{
			{PT_PHDR, PF_R + PF_X, 0x34, 0x8048034, 0x8048034, 0xa0, 0xa0, 0x4},
			{PT_INTERP, PF_R, 0xd4, 0x80480d4, 0x80480d4, 0x15, 0x15, 0x1},
			{PT_LOAD, PF_R + PF_X, 0x0, 0x8048000, 0x8048000, 0x5fb, 0x5fb, 0x1000},
			{PT_LOAD, PF_R + PF_W, 0x5fc, 0x80495fc, 0x80495fc, 0xd8, 0xf8, 0x1000},

		// 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'.
		// TODO: switch to FPXX after be sure that no odd-number-fpr is used.
		ctxt.Out.Write8(MIPS_FPABI_ANY) // fpAbi
	}

		return "ppc64"
	case elf.EM_S390:
		return "s390x"
	}
	return ""
}

func (f *elfFile) loadAddress() (uint64, error) {
	for _, p := range f.elf.Progs {
		if p.Type == elf.PT_LOAD && p.Flags&elf.PF_X != 0 {
			// The memory mapping that contains the segment
			// starts at an aligned address. Apparently this
			// is what pprof expects, as it uses this and the
			// start address of the mapping to compute PC

	for _, s := range x.f.Sections {
		if s.Name == ".go.buildinfo" {
			return s.Addr, s.Size
		}
	}
	for _, p := range x.f.Progs {
		if p.Type == elf.PT_LOAD && p.Flags&(elf.PF_X|elf.PF_W) == elf.PF_W {
			return p.Vaddr, p.Memsz
		}
	}
	return 0, 0
}

// peExe is the PE (Windows Portable Executable) implementation of the exe interface.
type peExe struct {
	f *pe.File
}

	for _, s := range f.Sections {
		if s.Name == ".text" {
			// Find the LOAD segment containing the .text section.
			for _, p := range f.Progs {
				if p.Type == elf.PT_LOAD && p.Flags&elf.PF_X != 0 && s.Addr >= p.Vaddr && s.Addr < p.Vaddr+p.Memsz {
					return &p.ProgHeader
				}
			}
		}
	}
	return nil
}

// ProgramHeadersForMapping returns the program segment headers that overlap

	}

	base, err := elfexec.GetBase(&ef.FileHeader, ph, f.m.kernelOffset, f.m.start, f.m.limit, f.m.offset)
	if err != nil {
		return err
	}
	f.base = base
	f.isData = ph != nil && ph.Flags&elf.PF_X == 0
	return nil
}

func (f *file) Name() string {
	return f.name
}

func (f *file) ObjAddr(addr uint64) (uint64, error) {
	f.baseOnce.Do(func() { f.baseErr = f.computeBase(addr) })

				"image/vnd.dwg",
				"image/vnd.dxf",
				"image/vnd.fastbidsheet",
				"image/vnd.fpx",
				"image/vnd.fst",
				"image/vnd.fujixerox.edmics-mmr",
				"image/vnd.fujixerox.edmics-rlc",
				"image/vnd.globalgraphics.pgb",
				"image/vnd.microsoft.icon",
				"image/vnd.mix",
				"image/vnd.ms-modi",
				"image/vnd.net-fpx",
				"image/vnd.radiance",
				"image/vnd.sealed.png",