elf.5.updates.patch

   1 --- man5/elf.5
   2 +++ man5/elf.5
   3 @@ -584,6 +584,11 @@
   4  Values less than or equal to
   5  .Sy PT_LOPROC
   6  are reserved for processor-specific semantics.
   7 +.It PT_GNU_STACK
   8 +GNU extension which is used by the Linux kernel to control the state of the
   9 +stack via the flags set in the
  10 +.Sy p_flags
  11 +member.
  12  .El
  13  .Pp
  14  .It Dv p_offset
  15 @@ -606,7 +611,7 @@
  16  This member holds the number of bytes in the memory image of the segment.
  17  It may be zero.
  18  .It Dv p_flags
  19 -This member holds flags relevant to the segment:
  20 +This member holds a bitmask of flags relevant to the segment:
  21  .Pp
  22  .Bl -tag -width "PF_X" -compact
  23  .It Dv PF_X
  24 @@ -998,6 +1003,25 @@
  25  .Sy SHF_ALLOC
  26  and
  27  .Sy SHF_EXECINSTR .
  28 +.It .gnu.version
  29 +This section holds the version symbol table, an array of ElfN_Half elements.
  30 +This section is of type
  31 +.Sy SHT_GNU_versym .
  32 +The attribute type used is
  33 +.Sy SHF_ALLOC .
  34 +.It .gnu.version_d
  35 +This section holds the version symbol definitons, a table of ElfN_Verdef
  36 +structures.  This section is of type
  37 +.Sy SHT_GNU_verdef .
  38 +The attribute type used is
  39 +.Sy SHF_ALLOC .
  40 +.It .gnu.version_r
  41 +This section holds the version symbol needed elements, a table of
  42 +ElfN_Verneed structures.  This section is of
  43 +type
  44 +.Sy SHT_GNU_versym .
  45 +The attribute type used is
  46 +.Sy SHF_ALLOC .
  47  .It .got
  48  This section holds the global offset table.
  49  This section is of type
  50 @@ -1049,6 +1073,14 @@
  51  .Sy .note.openbsd.ident
  52  section to identify themselves, for the kernel to bypass any compatibility
  53  ELF binary emulation tests when loading the file.
  54 +.It .note.GNU-stack
  55 +This section is used in Linux object files for declaring stack attributes.
  56 +This section is of type
  57 +.Sy SHT_PROGBITS .
  58 +The only attribute used is
  59 +.Sy SHF_EXECINSTR .
  60 +This indicates to the GNU linker that the object file requires an
  61 +executable stack.
  62  .It .plt
  63  This section holds the procedure linkage table.
  64  This section is of type
  65 @@ -1271,7 +1301,23 @@
  66  .El
  67  .Pp
  68  .It Dv st_other
  69 -This member currently holds zero and has no defined meaning.
  70 +This member defines the symbol visibility.
  71 +.Bl -tag -width "STV_PROTECTED"
  72 +.It Dv STV_DEFAULT
  73 +Default symbol visibility rules.
  74 +.It Dv STV_INTERNAL
  75 +Processor specific hidden class.
  76 +.It Dv STV_HIDDEN
  77 +Symbol is unavailable in other modules.
  78 +.It Dv STV_PROTECTED
  79 +Not preemptible, not exported.
  80 +.Pp
  81 +There are macros for extracting the visibility type:
  82 +.Pp
  83 +.Fn ELF32_ST_VISIBILITY other
  84 +or
  85 +.Fn ELF64_ST_VISIBILITY other
  86 +.El
  87  .It Dv st_shndx
  88  Every symbol table entry is
  89  .Dq defined