git.wh0rd.org / patches.git / blame
| Commit | Line | Data |
|---|---|---|
| b53d1f41 MF |
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 |