freebsd-dev/contrib/elftoolchain/libdwarf/dwarf_get_fde_range.3
Ed Maste ae500c1ff8 Update to ELF Tool Chain r3668
Highlights:
- Make sure that only TLS sections are sorted into TLS segment.
- Fixed multiple errors in "Section to Segment mapping".
- Man page updates
- ar improvements
- elfcopy: avoid filter_reloc uninitialized variable for rela
- elfcopy: avoid stripping relocations from static binaries
- readelf: avoid printing directory in front of absolute path
- readelf: add NT_FREEBSD_FEATURE_CTL FreeBSD note type
- test improvements

NOTES:

Some of these changes originated in FreeBSD and simply reduce diffs
between contrib and vendor.

ELF Tool Chain ar is not (currently) used in FreeBSD, and there are
improvements in both FreeBSD and ELF Tool Chain ar that are not in
the other.

Sponsored by:	The FreeBSD Foundation
2019-01-10 14:35:23 +00:00

150 lines
4.2 KiB
Groff

.\" Copyright (c) 2011 Kai Wang
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.\" $Id: dwarf_get_fde_range.3 3644 2018-10-15 19:55:01Z jkoshy $
.\"
.Dd May 22, 2011
.Dt DWARF_GET_FDE_RANGE 3
.Os
.Sh NAME
.Nm dwarf_get_fde_range
.Nd retrieve range information from an FDE descriptor
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft int
.Fo dwarf_get_fde_range
.Fa "Dwarf_Fde fde"
.Fa "Dwarf_Addr *low_pc"
.Fa "Dwarf_Unsigned *func_len"
.Fa "Dwarf_Ptr *fde_bytes"
.Fa "Dwarf_Unsigned *fde_byte_len"
.Fa "Dwarf_Off *cie_offset"
.Fa "Dwarf_Signed *cie_index"
.Fa "Dwarf_Off *fde_offset"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_get_fde_range
retrieves range and offset information from a given FDE descriptor.
.Pp
Argument
.Ar fde
should reference a valid DWARF FDE descriptor.
.Pp
Argument
.Ar low_pc
should point to a location that will be set to the lowest
program counter address covered by the FDE descriptor.
.Pp
Argument
.Ar func_len
should point to a location that will hold the length in bytes of
the address range covered by the FDE descriptor.
.Pp
Argument
.Ar fde_bytes
should point to a location that will be set to a pointer to the
content of the FDE descriptor itself.
.Pp
Argument
.Ar fde_byte_len
should point to a location that will hold the length in bytes of
the FDE descriptor itself.
.Pp
Argument
.Ar cie_offset
should point to a location that will be set to the offset, relative to
the DWARF
.Dq ".debug_frame"
section, of the CIE descriptor associated with the given FDE
descriptor.
.Pp
Argument
.Ar cie_index
should point to a location that will hold the index of the CIE
descriptor associated with the FDE descriptor.
The returned value is a zero-based index into the array of CIE
descriptors returned by a prior call to functions
.Xr dwarf_get_fde_list 3
or
.Xr dwarf_get_fde_list_eh 3 .
.Pp
Argument
.Ar fde_offset
should point to a location that will be set to the offset, relative to
the DWARF
.Dq ".debug_frame"
section, of the FDE descriptor.
.Pp
If argument
.Ar err
is not NULL, it will be used to store error information in case of an
error.
.Sh RETURN VALUES
Function
.Fn dwarf_get_fde_range
returns
.Dv DW_DLV_OK
when it succeeds.
In case of an error, it returns
.Dv DW_DLV_ERROR
and sets the argument
.Ar err .
.Sh ERRORS
Function
.Fn dwarf_get_fde_range
can fail with:
.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
.It Bq Er DW_DLE_ARGUMENT
One of the arguments
.Ar fde ,
.Ar low_pc ,
.Ar func_len ,
.Ar fde_bytes ,
.Ar fde_byte_len ,
.Ar cie_offset ,
.Ar cie_index
or
.Ar fde_offset
was NULL.
.El
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_get_cie_index 3 ,
.Xr dwarf_get_cie_info 3 ,
.Xr dwarf_get_cie_of_fde 3 ,
.Xr dwarf_get_fde_at_pc 3 ,
.Xr dwarf_get_fde_info_for_all_regs 3 ,
.Xr dwarf_get_fde_info_for_all_regs3 3 ,
.Xr dwarf_get_fde_info_for_cfa_reg3 3 ,
.Xr dwarf_get_fde_info_for_reg 3 ,
.Xr dwarf_get_fde_info_for_reg3 3 ,
.Xr dwarf_get_fde_instr_bytes 3 ,
.Xr dwarf_get_fde_list 3 ,
.Xr dwarf_get_fde_list_eh 3 ,
.Xr dwarf_get_fde_n 3