Module index

# Module `ida_segment`

Functions that deal with segments.

IDA requires that all program addresses belong to segments (each address must belong to exactly one segment). The situation when an address doesn't belong to any segment is allowed as a temporary situation only when the user changes program segmentation. Bytes outside a segment can't be converted to instructions, have names, comments, etc. Each segment has its start address, ending address and represents a contiguous range of addresses. There might be unused holes between segments.

Each segment has its unique segment selector. This selector is used to distinguish the segment from other segments. For 16-bit programs the selector is equal to the segment base paragraph. For 32-bit programs there is special array to translate the selectors to the segment base paragraphs. A selector is a 32/64 bit value.

The segment base paragraph determines the offsets in the segment. If the start address of the segment == (base << 4) then the first offset in the segment will be 0. The start address should be higher or equal to (base << 4). We will call the offsets in the segment 'virtual addresses'. So, the virtual address of the first byte of the segment is

(start address of segment - segment base linear address)

For IBM PC, the virtual address corresponds to the offset part of the address. For other processors (Z80, for example), virtual addresses correspond to Z80 addresses and linear addresses are used only internally. For MS Windows programs the segment base paragraph is 0 and therefore the segment virtual addresses are equal to linear addresses.

## Global variables

`var ADDSEG_FILLGAP`

  fill gap between new segment and previous one. i.e. if such a gap exists, and this gap is less than 64K, then fill the gap by extending the previous segment and adding .align directive to it. This way we avoid gaps between segments. too many gaps lead to a virtual array failure. it cannot hold more than ~1000 gaps.

`var ADDSEG_IDBENC`

  'name' and 'sclass' are given in the IDB encoding; non-ASCII bytes will be decoded accordingly

`var ADDSEG_NOAA`

  do not mark new segment for auto-analysis

`var ADDSEG_NOSREG`

  set all default segment register values to BADSEL (undefine all default segment registers)

`var ADDSEG_NOTRUNC`

  don't truncate the new segment at the beginning of the next segment if they overlap. destroy/truncate old segments instead.

`var ADDSEG_OR_DIE`

  qexit() if can't add a segment

`var ADDSEG_QUIET`

  silent mode, no "Adding segment…" in the messages window

`var ADDSEG_SPARSE`

  use sparse storage method for the new ranges of the created segment. please note that the ranges that were already enabled before creating the segment will not change their storage type.

`var CSS_BREAK`

  memory reading process stopped by user

`var CSS_NODBG`

  debugger is not running

`var CSS_NOMEM`

  not enough memory (might be because the segment is too big)

`var CSS_NORANGE`

  could not find corresponding memory range

`var CSS_OK`

  ok

`var MAX_GROUPS`

  max number of segment groups

`var MAX_SEGM_TRANSLATIONS`

  max number of segment translations

`var MOVE_SEGM_CHUNK`

  Too many chunks are defined, can't move.

`var MOVE_SEGM_DEBUG`

  Debugger segments cannot be moved.

`var MOVE_SEGM_IDP`

  IDP module forbids moving the segment.

`var MOVE_SEGM_INVAL`

  Invalid argument (delta/target does not fit the address space)

`var MOVE_SEGM_LOADER`

  The segment has been moved but the loader complained.

`var MOVE_SEGM_MAPPING`

  Memory mapping ranges of addresses hinder segment movement.

`var MOVE_SEGM_ODD`

  Cannot move segments by an odd number of bytes.

`var MOVE_SEGM_OK`

  all ok

`var MOVE_SEGM_ORPHAN`

  Orphan bytes hinder segment movement.

`var MOVE_SEGM_PARAM`

  The specified segment does not exist.

`var MOVE_SEGM_ROOM`

  Not enough free room at the target address.

`var MOVE_SEGM_SOURCEFILES`

  Source files ranges of addresses hinder segment movement.

`var MSF_FIXONCE`

  call loader only once with the special calling method. valid for rebase_program(). see loader_t::move_segm.

`var MSF_LDKEEP`

  keep the loader in the memory (optimization)

`var MSF_NETNODES`

  move netnodes instead of changing inf.netdelta (this is slower); valid for rebase_program()

`var MSF_NOFIX`

  don't call the loader to fix relocations

`var MSF_PRIORITY`

  loader segments will overwrite any existing debugger segments when moved. valid for move_segm()

`var MSF_SILENT`

  don't display a "please wait" box on the screen

`var SEGMOD_KEEP`

  keep information (code & data, etc)

`var SEGMOD_KEEP0`

  flag for internal use, don't set

`var SEGMOD_KEEPSEL`

  do not try to delete unused selector

`var SEGMOD_KILL`

  disable addresses if segment gets shrinked or deleted

`var SEGMOD_NOMOVE`

  don't move info from the start of segment to the new start address (for set_segm_start())

`var SEGMOD_SILENT`

  be silent

`var SEGMOD_SPARSE`

  use sparse storage if extending the segment (for set_segm_start(), set_segm_end())

`var SEGPERM_EXEC`

  Execute.

`var SEGPERM_MAXVAL`

  Execute + Write + Read.

`var SEGPERM_READ`

  Read.

`var SEGPERM_WRITE`

  Write.

`var SEG_ABSSYM`
  - segment with definitions of absolute symbols
`var SEG_BSS`

  uninitialized segment

`var SEG_CODE`

  code segment

`var SEG_COMM`
  - segment with communal definitions
`var SEG_DATA`

  data segment

`var SEG_GRP`
  - group of segments
`var SEG_IMEM`

  internal processor memory & sfr (8051)

`var SEG_IMP`

  java: implementation segment

`var SEG_MAX_BITNESS_CODE`

  Maximum segment bitness value.

`var SEG_MAX_SEGTYPE_CODE`

  maximum value segment type can take

`var SEG_NORM`

  unknown type, no assumptions

`var SEG_NULL`

  zero-length segment

`var SEG_UNDF`

  undefined segment type (not used)

`var SEG_XTRN`
  - segment with 'extern' definitions. no instructions are allowed
`var SFL_COMORG`

  IDP dependent field (IBM PC: if set, ORG directive is not commented out)

`var SFL_DEBUG`

  Is the segment created for the debugger?. Such segments are temporary and do not have permanent flags.

`var SFL_HEADER`

  Header segment (do not create offsets to it in the disassembly)

`var SFL_HIDDEN`

  Is the segment hidden?

`var SFL_HIDETYPE`

  Hide segment type (do not print it in the listing)

`var SFL_LOADER`

  Is the segment created by the loader?

`var SFL_OBOK`

  Orgbase is present? (IDP dependent field)

`var SNAP_ALL_SEG`

  Take a snapshot of all segments.

`var SNAP_CUR_SEG`

  Take a snapshot of current segment.

`var SNAP_LOAD_SEG`

  Take a snapshot of loader segments.

`var SREG_NUM`

  Maximum number of segment registers is 16 (see segregs.hpp)

`var saAbs`

  Absolute segment.

`var saGroup`

  Segment group.

`var saRel1024Bytes`

  1024 bytes

`var saRel128Bytes`

  128 bytes

`var saRel2048Bytes`

  2048 bytes

`var saRel32Bytes`

  32 bytes

`var saRel4K`

  This value is used by the PharLap OMF for page (4K) alignment. It is not supported by LINK.

`var saRel512Bytes`

  512 bytes

`var saRel64Bytes`

  64 bytes

`var saRelByte`

  Relocatable, byte aligned.

`var saRelDble`

  Relocatable, aligned on a double word (4-byte) boundary.

`var saRelPage`

  Relocatable, aligned on 256-byte boundary.

`var saRelPara`

  Relocatable, paragraph (16-byte) aligned.

`var saRelQword`

  8 bytes

`var saRelWord`

  Relocatable, word (2-byte) aligned.

`var scCommon`

  Common. Combine by overlay using maximum size.

`var scGroup`

  Segment group.

`var scPriv`

  Private. Do not combine with any other program segment.

`var scPub`

  Public. Combine by appending at an offset that meets the alignment requirement.

`var scPub2`

  As defined by Microsoft, same as C=2 (public).

`var scPub3`

  As defined by Microsoft, same as C=2 (public).

`var scStack`

  Stack. Combine as for C=2. This combine type forces byte alignment.

## Functions

`def add_segm(para: ea_t, start: ea_t, end: ea_t, name: char const *, sclass: char const *, flags: int = 0)`

  add_segm(para, start, end, name, sclass, flags=0) -> bool Add a new segment, second form. Segment alignment is set to saRelByte. Segment combination is "public" or "stack" (if segment class is "STACK"). Addressing mode of segment is taken as default (16bit or 32bit). Default segment registers are set to BADSEL. If a segment already exists at the specified range of addresses, this segment will be truncated. Instructions and data in the old segment will be deleted if the new segment has another addressing mode or another segment base address.

  @param para: (C++: ea_t) segment base paragraph. if paragraph can't fit in 16bit, then a new selector is allocated and mapped to the paragraph. @param start: (C++: ea_t) start address of the segment. if start==BADADDR then start <- to_ea(para,0). @param end: (C++: ea_t) end address of the segment. end address should be higher than start address. For emulate empty segments, use SEG_NULL segment type. If the end address is lower than start address, then fail. If end==BADADDR, then a segment up to the next segment will be created (if the next segment doesn't exist, then 1 byte segment will be created). If 'end' is too high and the new segment would overlap the next segment, 'end' is adjusted properly. @param name: (C++: const char ) name of new segment. may be nullptr @param sclass: (C++: const char ) class of the segment. may be nullptr. type of the new segment is modified if class is one of predefined names: * "CODE" -> SEG_CODE * "DATA" -> SEG_DATA * "CONST" -> SEG_DATA * "STACK" -> SEG_BSS * "BSS" -> SEG_BSS * "XTRN" -> SEG_XTRN * "COMM" -> SEG_COMM * "ABS" -> SEG_ABSSYM @param flags: (C++: int) Add segment flags @retval 1: ok @retval 0: failed, a warning message is displayed

`def add_segm_ex(NONNULL_s: segment_t, name: char const *, sclass: char const *, flags: int)`

  add_segm_ex(NONNULL_s, name, sclass, flags) -> bool Add a new segment. If a segment already exists at the specified range of addresses, this segment will be truncated. Instructions and data in the old segment will be deleted if the new segment has another addressing mode or another segment base address.

  @param NONNULL_s: (C++: segment_t ) @param name: (C++: const char ) name of new segment. may be nullptr. if specified, the segment is immediately renamed @param sclass: (C++: const char *) class of the segment. may be nullptr. if specified, the segment class is immediately changed @param flags: (C++: int) Add segment flags @retval 1: ok @retval 0: failed, a warning message is displayed

`def add_segment_translation(segstart: ea_t, mappedseg: ea_t)`

  add_segment_translation(segstart, mappedseg) -> bool Add segment translation.

  @param segstart: (C++: ea_t) start address of the segment to add translation to @param mappedseg: (C++: ea_t) start address of the overlayed segment @retval 1: ok @retval 0: too many translations or bad segstart

`def allocate_selector(segbase: ea_t)`

  allocate_selector(segbase) -> sel_t Allocate a selector for a segment unconditionally. You must call this function before calling add_segm_ex(). add_segm() calls this function itself, so you don't need to allocate a selector. This function will allocate a new free selector and setup its mapping using find_free_selector() and set_selector() functions.

  @param segbase: (C++: ea_t) a new segment base paragraph @return: the allocated selector number

`def change_segment_status(s: segment_t, is_deb_segm: bool) ‑> int`

  change_segment_status(s, is_deb_segm) -> int Convert a debugger segment to a regular segment and vice versa. When converting debug->regular, the memory contents will be copied to the database.

  @param s: (C++: segment_t *) segment to modify @param is_deb_segm: (C++: bool) new status of the segment @return: Change segment status result codes

`def del_segm(ea: ea_t, flags: int)`

  del_segm(ea, flags) -> bool Delete a segment.

  @param ea: (C++: ea_t) any address belonging to the segment @param flags: (C++: int) Segment modification flags @retval 1: ok @retval 0: failed, no segment at 'ea'.

`def del_segment_translations(segstart: ea_t)`

  del_segment_translations(segstart) Delete the translation list

  @param segstart: (C++: ea_t) start address of the segment to delete translation list

`def del_selector(selector: sel_t)`

  del_selector(selector) Delete mapping of a selector. Be wary of deleting selectors that are being used in the program, this can make a mess in the segments.

  @param selector: (C++: sel_t) number of selector to remove from the translation table

`def find_free_selector()`

  find_free_selector() -> sel_t Find first unused selector.

  @return: a number >= 1

`def find_selector(base: ea_t)`

  find_selector(base) -> sel_t Find a selector that has mapping to the specified paragraph.

  @param base: (C++: ea_t) paragraph to search in the translation table @return: selector value or base

`def get_defsr(s: segment_t, reg: int)`

  get_defsr(s, reg) -> sel_t Deprecated, use instead: value = s.defsr[reg]

  @param s: segment_t * @param reg: int

`def get_first_seg()`

  get_first_seg() -> segment_t Get pointer to the first segment.

`def get_group_selector(grpsel: sel_t)`

  get_group_selector(grpsel) -> sel_t Get common selector for a group of segments.

  @param grpsel: (C++: sel_t) selector of group segment @return: common selector of the group or 'grpsel' if no such group is found

`def get_last_seg()`

  get_last_seg() -> segment_t Get pointer to the last segment.

`def get_next_seg(ea: ea_t)`

  get_next_seg(ea) -> segment_t Get pointer to the next segment.

  @param ea: (C++: ea_t)

`def get_prev_seg(ea: ea_t)`

  get_prev_seg(ea) -> segment_t Get pointer to the previous segment.

  @param ea: (C++: ea_t)

`def get_segm_base(s: segment_t)`

  get_segm_base(s) -> ea_t Get segment base linear address. Segment base linear address is used to calculate virtual addresses. The virtual address of the first byte of the segment will be (start address of segment - segment base linear address)

  @param s: (C++: const segment_t *) pointer to segment @return: 0 if s == nullptr, otherwise segment base linear address

`def get_segm_by_name(name: char const *)`

  get_segm_by_name(name) -> segment_t Get pointer to segment by its name. If there are several segments with the same name, returns the first of them.

  @param name: (C++: const char *) segment name. may be nullptr. @return: nullptr or pointer to segment structure

`def get_segm_by_sel(selector: sel_t)`

  get_segm_by_sel(selector) -> segment_t Get pointer to segment structure. This function finds a segment by its selector. If there are several segments with the same selectors, the last one will be returned.

  @param selector: (C++: sel_t) a segment with the specified selector will be returned @return: pointer to segment or nullptr

`def get_segm_class(s: segment_t)`

  get_segm_class(s) -> str Get segment class. Segment class is arbitrary text (max 8 characters).

  @param s: (C++: const segment_t *) pointer to segment @return: size of segment class (-1 if s==nullptr or bufsize<=0)

`def get_segm_name(s: segment_t, flags: int = 0)`

  get_segm_name(s, flags=0) -> ssize_t Get true segment name by pointer to segment.

  @param s: (C++: const segment_t *) pointer to segment @param flags: (C++: int) 0-return name as is; 1-substitute bad symbols with _ 1 corresponds to GN_VISIBLE @return: size of segment name (-1 if s==nullptr)

`def get_segm_num(ea: ea_t)`

  get_segm_num(ea) -> int Get number of segment by address.

  @param ea: (C++: ea_t) linear address belonging to the segment @return: -1 if no segment occupies the specified address. otherwise returns number of the specified segment (0..get_segm_qty()-1)

`def get_segm_para(s: segment_t)`

  get_segm_para(s) -> ea_t Get segment base paragraph. Segment base paragraph may be converted to segment base linear address using to_ea() function. In fact, to_ea(get_segm_para(s), 0) == get_segm_base(s).

  @param s: (C++: const segment_t *) pointer to segment @return: 0 if s == nullptr, the segment base paragraph

`def get_segm_qty() ‑> int`

  get_segm_qty() -> int Get number of segments.

`def get_segment_alignment(align: uchar)`

  get_segment_alignment(align) -> char const * Get text representation of segment alignment code.

  @param align: (C++: uchar) @return: text digestable by IBM PC assembler.

`def get_segment_cmt(s: segment_t, repeatable: bool)`

  get_segment_cmt(s, repeatable) -> str Get segment comment.

  @param s: (C++: const segment_t *) pointer to segment structure @param repeatable: (C++: bool) 0: get regular comment. 1: get repeatable comment. @return: size of comment or -1

`def get_segment_combination(comb: uchar)`

  get_segment_combination(comb) -> char const * Get text representation of segment combination code.

  @param comb: (C++: uchar) @return: text digestable by IBM PC assembler.

`def get_segment_translations(transmap: eavec_t *, segstart: ea_t)`

  get_segment_translations(transmap, segstart) -> ssize_t Get segment translation list.

  @param transmap: (C++: eavec_t *) vector of segment start addresses for the translation list @param segstart: (C++: ea_t) start address of the segment to get information about @return: -1 if no translation list or bad segstart. otherwise returns size of translation list.

`def get_selector_qty()`

  get_selector_qty() -> size_t Get number of defined selectors.

`def get_visible_segm_name(s: segment_t)`

  get_visible_segm_name(s) -> str Get segment name by pointer to segment.

  @param s: (C++: const segment_t *) pointer to segment @return: size of segment name (-1 if s==nullptr)

`def getn_selector(n: int)`

  getn_selector(n) -> bool Get description of selector (0..get_selector_qty()-1)

  @param n: (C++: int)

`def getnseg(n: int)`

  getnseg(n) -> segment_t Get pointer to segment by its number. @warning: Obsoleted because it can slow down the debugger (it has to refresh the whole memory segmentation to calculate the correct answer)

  @param n: (C++: int) segment number in the range (0..get_segm_qty()-1) @return: nullptr or pointer to segment structure

`def getseg(ea: ea_t)`

  getseg(ea) -> segment_t Get pointer to segment by linear address.

  @param ea: (C++: ea_t) linear address belonging to the segment @return: nullptr or pointer to segment structure

`def is_finally_visible_segm(s: segment_t) ‑> bool`

  is_finally_visible_segm(s) -> bool See SFL_HIDDEN, SCF_SHHID_SEGM.

  @param s: (C++: segment_t *)

`def is_miniidb() ‑> bool`

  is_miniidb() -> bool Is the database a miniidb created by the debugger?.

  @return: true if the database contains no segments or only debugger segments

`def is_segm_locked(segm: segment_t) ‑> bool`

  is_segm_locked(segm) -> bool Is a segment pointer locked?

  @param segm: (C++: const segment_t *) segment_t const *

`def is_spec_ea(ea: ea_t)`

  is_spec_ea(ea) -> bool Does the address belong to a segment with a special type?. (SEG_XTRN, SEG_GRP, SEG_ABSSYM, SEG_COMM)

  @param ea: (C++: ea_t) linear address

`def is_spec_segm(seg_type: uchar)`

  is_spec_segm(seg_type) -> bool Has segment a special type?. (SEG_XTRN, SEG_GRP, SEG_ABSSYM, SEG_COMM)

  @param seg_type: (C++: uchar)

`def is_visible_segm(s: segment_t) ‑> bool`

  is_visible_segm(s) -> bool See SFL_HIDDEN.

  @param s: (C++: segment_t *)

`def lock_segm(segm: segment_t, lock: bool)`

  lock_segm(segm, lock) Lock segment pointer Locked pointers are guaranteed to remain valid until they are unlocked. Ranges with locked pointers cannot be deleted or moved.

  @param segm: (C++: const segment_t *) segment_t const * @param lock: (C++: bool)

`def move_segm(s: segment_t, to: ea_t, flags: int = 0)`

  move_segm(s, to, flags=0) -> move_segm_code_t This function moves all information to the new address. It fixes up address sensitive information in the kernel. The total effect is equal to reloading the segment to the target address. For the file format dependent address sensitive information, loader_t::move_segm is called. Also IDB notification event idb_event::segm_moved is called.

  @param s: (C++: segment_t *) segment to move @param to: (C++: ea_t) new segment start address @param flags: (C++: int) Move segment flags @return: Move segment result codes

`def move_segm_start(ea: ea_t, newstart: ea_t, mode: int)`

  move_segm_start(ea, newstart, mode) -> bool Move segment start. The main difference between this function and set_segm_start() is that this function may expand the previous segment while set_segm_start() never does it. So, this function allows to change bounds of two segments simultaneously. If the previous segment and the specified segment have the same addressing mode and segment base, then instructions and data are not destroyed - they simply move from one segment to another. Otherwise all instructions/data which migrate from one segment to another are destroyed. @note: this function never disables addresses.

  @param ea: (C++: ea_t) any address belonging to the segment @param newstart: (C++: ea_t) new start address of the segment note that segment start address should be higher than segment base linear address. @param mode: (C++: int) policy for destroying defined items * 0: if it is necessary to destroy defined items, display a dialog box and ask confirmation * 1: if it is necessary to destroy defined items, just destroy them without asking the user * -1: if it is necessary to destroy defined items, don't destroy them (i.e. function will fail) * -2: don't destroy defined items (function will succeed) @retval 1: ok @retval 0: failed, a warning message is displayed

`def move_segm_strerror(code: move_segm_code_t)`

  move_segm_strerror(code) -> char const * Return string describing error MOVE_SEGM_… code.

  @param code: (C++: move_segm_code_t) enum move_segm_code_t

`def rebase_program(delta: PyObject *, flags: int)`

  rebase_program(delta, flags) -> int Rebase the whole program by 'delta' bytes.

  @param delta: (C++: adiff_t) number of bytes to move the program @param flags: (C++: int) Move segment flags it is recommended to use MSF_FIXONCE so that the loader takes care of global variables it stored in the database @return: Move segment result codes

`def segm_adjust_diff(s: segment_t, delta: adiff_t)`

  segm_adjust_diff(s, delta) -> adiff_t Truncate and sign extend a delta depending on the segment.

  @param s: (C++: const segment_t *) segment_t const * @param delta: (C++: adiff_t)

`def segm_adjust_ea(s: segment_t, ea: ea_t)`

  segm_adjust_ea(s, ea) -> ea_t Truncate an address depending on the segment.

  @param s: (C++: const segment_t *) segment_t const * @param ea: (C++: ea_t)

`def segtype(ea: ea_t)`

  segtype(ea) -> uchar Get segment type.

  @param ea: (C++: ea_t) any linear address within the segment @return: Segment types, SEG_UNDF if no segment found at 'ea'

`def sel2ea(selector: sel_t)`

  sel2ea(selector) -> ea_t Get mapping of a selector as a linear address.

  @param selector: (C++: sel_t) number of selector to translate to linear address @return: linear address the specified selector is mapped to. if there is no mapping, returns to_ea(selector,0);

`def sel2para(selector: sel_t)`

  sel2para(selector) -> ea_t Get mapping of a selector.

  @param selector: (C++: sel_t) number of selector to translate @return: paragraph the specified selector is mapped to. if there is no mapping, returns 'selector'.

`def set_defsr(s: segment_t, reg: int, value: sel_t)`

  set_defsr(s, reg, value) Deprecated, use instead: s.defsr[reg] = value

  @param s: segment_t * @param reg: int @param value: sel_t

`def set_group_selector(grp: sel_t, sel: sel_t)`

  set_group_selector(grp, sel) -> int Create a new group of segments (used OMF files).

  @param grp: (C++: sel_t) selector of group segment (segment type is SEG_GRP) You should create an 'empty' (1 byte) group segment It won't contain anything and will be used to redirect references to the group of segments to the common selector. @param sel: (C++: sel_t) common selector of all segments belonging to the segment You should create all segments within the group with the same selector value. @return: 1 ok 0 too many groups (see MAX_GROUPS)

`def set_segm_addressing(s: segment_t, bitness: size_t)`

  set_segm_addressing(s, bitness) -> bool Change segment addressing mode (16, 32, 64 bits). You must use this function to change segment addressing, never change the 'bitness' field directly. This function will delete all instructions, comments and names in the segment

  @param s: (C++: segment_t *) pointer to segment @param bitness: (C++: size_t) new addressing mode of segment * 2: 64bit segment * 1: 32bit segment * 0: 16bit segment @return: success

`def set_segm_base(s: segment_t, newbase: ea_t)`

  set_segm_base(s, newbase) -> bool Internal function.

  @param s: (C++: segment_t *) @param newbase: (C++: ea_t)

`def set_segm_class(s: segment_t, sclass: char const *, flags: int = 0)`

  set_segm_class(s, sclass, flags=0) -> int Set segment class.

  @param s: (C++: segment_t ) pointer to segment (may be nullptr) @param sclass: (C++: const char ) segment class (may be nullptr). If segment type is SEG_NORM and segment class is one of predefined names, then segment type is changed to: * "CODE" -> SEG_CODE * "DATA" -> SEG_DATA * "STACK" -> SEG_BSS * "BSS" -> SEG_BSS * if "UNK" then segment type is reset to SEG_NORM. @param flags: (C++: int) Add segment flags @retval 1: ok, name is good and segment is renamed @retval 0: failure, name is nullptr or bad or segment is nullptr

`def set_segm_end(ea: ea_t, newend: ea_t, flags: int)`

  set_segm_end(ea, newend, flags) -> bool Set segment end address. The next segment is shrinked to allow expansion of the specified segment. The kernel might even delete the next segment if necessary. The kernel will ask the user for a permission to destroy instructions or data going out of segment scope if such instructions exist.

  @param ea: (C++: ea_t) any address belonging to the segment @param newend: (C++: ea_t) new end address of the segment @param flags: (C++: int) Segment modification flags @retval 1: ok @retval 0: failed, a warning message is displayed

`def set_segm_name(s: segment_t, name: char const *, flags: int = 0)`

  set_segm_name(s, name, flags=0) -> int Rename segment. The new name is validated (see validate_name). A segment always has a name. If you hadn't specified a name, the kernel will assign it "seg###" name where ### is segment number.

  @param s: (C++: segment_t ) pointer to segment (may be nullptr) @param name: (C++: const char ) new segment name @param flags: (C++: int) ADDSEG_IDBENC or 0 @retval 1: ok, name is good and segment is renamed @retval 0: failure, name is bad or segment is nullptr

`def set_segm_start(ea: ea_t, newstart: ea_t, flags: int)`

  set_segm_start(ea, newstart, flags) -> bool Set segment start address. The previous segment is trimmed to allow expansion of the specified segment. The kernel might even delete the previous segment if necessary. The kernel will ask the user for a permission to destroy instructions or data going out of segment scope if such instructions exist.

  @param ea: (C++: ea_t) any address belonging to the segment @param newstart: (C++: ea_t) new start address of the segment note that segment start address should be higher than segment base linear address. @param flags: (C++: int) Segment modification flags @retval 1: ok @retval 0: failed, a warning message is displayed

`def set_segment_cmt(s: segment_t, cmt: char const *, repeatable: bool)`

  set_segment_cmt(s, cmt, repeatable) Set segment comment.

  @param s: (C++: const segment_t ) pointer to segment structure @param cmt: (C++: const char ) comment string, may be multiline (with ' '). maximal size is 4096 bytes. Use empty str ("") to delete comment @param repeatable: (C++: bool) 0: set regular comment. 1: set repeatable comment.

`def set_segment_translations(segstart: ea_t, transmap: eavec_t const &)`

  set_segment_translations(segstart, transmap) -> bool Set new translation list.

  @param segstart: (C++: ea_t) start address of the segment to add translation to @param transmap: (C++: const eavec_t &) vector of segment start addresses for the translation list. If transmap is empty, the translation list is deleted. @retval 1: ok @retval 0: too many translations or bad segstart

`def set_selector(selector: sel_t, paragraph: ea_t)`

  set_selector(selector, paragraph) -> int Set mapping of selector to a paragraph. You should call this function before creating a segment which uses the selector, otherwise the creation of the segment will fail.

  @param selector: (C++: sel_t) number of selector to map * if selector == BADSEL, then return 0 (fail) * if the selector has had a mapping, old mapping is destroyed * if the selector number is equal to paragraph value, then the mapping is destroyed because we don't need to keep trivial mappings. @param paragraph: (C++: ea_t) paragraph to map selector @retval 1: ok @retval 0: failure (bad selector or too many mappings)

`def set_visible_segm(s: segment_t, visible: bool)`

  set_visible_segm(s, visible) See SFL_HIDDEN.

  @param s: (C++: segment_t *) @param visible: (C++: bool)

`def setup_selector(segbase: ea_t)`

  setup_selector(segbase) -> sel_t Allocate a selector for a segment if necessary. You must call this function before calling add_segm_ex(). add_segm() calls this function itself, so you don't need to allocate a selector. This function will allocate a selector if 'segbase' requires more than 16 bits and the current processor is IBM PC. Otherwise it will return the segbase value.

  @param segbase: (C++: ea_t) a new segment base paragraph @return: the allocated selector number

`def std_out_segm_footer(ctx: outctx_t &, seg: segment_t)`

  std_out_segm_footer(ctx, seg) Generate segment footer line as a comment line. This function may be used in IDP modules to generate segment footer if the target assembler doesn't have 'ends' directive.

  @param ctx: (C++: struct outctx_t &) outctx_t & @param seg: (C++: segment_t *)

`def take_memory_snapshot(type: int) ‑> bool`

  take_memory_snapshot(type) -> bool Take a memory snapshot of the running process.

  @param type: (C++: int) specifies which snapshot we want (see SNAP_ Snapshot types) @return: success

`def update_segm(s: segment_t) ‑> bool`

  update_segm(s) -> bool

  @param s: segment_t *

## Classes

`class lock_segment (_segm: segment_t)`

  Proxy of C++ lock_segment class.

  init(self, _segm) -> lock_segment

  @param _segm: segment_t const *

  ### Instance variables

  `var thisown`

    The membership flag

`class segment_defsr_array (data: unsigned long long (&)[SREG_NUM])`

  Proxy of C++ wrapped_array_t< sel_t,SREG_NUM > class.

  init(self, data) -> segment_defsr_array

  @param data: unsigned long long (&)[SREG_NUM]

  ### Instance variables

  `var bytes : bytevec_t`

    _get_bytes(self) -> bytevec_t

  `var data : unsigned long long (&)[SREG_NUM]`

    data

  `var thisown`

    The membership flag

`class segment_t`

  Proxy of C++ segment_t class.

  init(self) -> segment_t

  ### Ancestors

  - range_t

  ### Instance variables

  `var align : uchar`

    Segment alignment codes

  `var bitness : uchar`

    Number of bits in the segment addressing * 0: 16 bits * 1: 32 bits * 2: 64 bits

  `var color : bgcolor_t`

    the segment color

  `var comb : uchar`

    Segment combination codes

  `var defsr : wrapped_array_t< sel_t,SREG_NUM >`

    default segment register values. first element of this array keeps information about value of processor_t::reg_first_sreg

  `var end_ea : ea_t`

    end_ea

  `var flags : ushort`

    Segment flags

  `var name : uval_t`

    use get/set_segm_name() functions

  `var orgbase : uval_t`

    this field is IDP dependent. you may keep your information about the segment here

  `var perm : uchar`

    Segment permissions (0 means no information)

  `var sclass : uval_t`

    use get/set_segm_class() functions

  `var sel : sel_t`

    segment selector - should be unique. You can't change this field after creating the segment. Exception: 16bit OMF files may have several segments with the same selector, but this is not good (no way to denote a segment exactly) so it should be fixed in the future.

  `var start_ea : ea_t`

    start_ea

  `var type : uchar`

    segment type (see Segment types). The kernel treats different segment types differently. Segments marked with '*' contain no instructions or data and are not declared as 'segments' in the disassembly.

  ### Methods

  `def abits(self) ‑> int`

    abits(self) -> int Get number of address bits.

  `def abytes(self) ‑> int`

    abytes(self) -> int Get number of address bytes.

  `def clr_comorg(self)`

    clr_comorg(self)

  `def clr_ob_ok(self)`

    clr_ob_ok(self)

  `def comorg(self) ‑> bool`

    comorg(self) -> bool

  `def is_16bit(self) ‑> bool`

    is_16bit(self) -> bool Is a 16-bit segment?

  `def is_32bit(self) ‑> bool`

    is_32bit(self) -> bool Is a 32-bit segment?

  `def is_64bit(self) ‑> bool`

    is_64bit(self) -> bool Is a 64-bit segment?

  `def is_header_segm(self) ‑> bool`

    is_header_segm(self) -> bool

  `def is_hidden_segtype(self) ‑> bool`

    is_hidden_segtype(self) -> bool

  `def is_loader_segm(self) ‑> bool`

    is_loader_segm(self) -> bool

  `def is_visible_segm(self) ‑> bool`

    is_visible_segm(self) -> bool

  `def ob_ok(self) ‑> bool`

    ob_ok(self) -> bool

  `def set_comorg(self)`

    set_comorg(self)

  `def set_debugger_segm(self, debseg: bool)`

    set_debugger_segm(self, debseg)

    @param debseg: bool

  `def set_header_segm(self, on: bool)`

    set_header_segm(self, on)

    @param on: bool

  `def set_hidden_segtype(self, hide: bool)`

    set_hidden_segtype(self, hide)

    @param hide: bool

  `def set_loader_segm(self, ldrseg: bool)`

    set_loader_segm(self, ldrseg)

    @param ldrseg: bool

  `def set_ob_ok(self)`

    set_ob_ok(self)

  `def set_visible_segm(self, visible: bool)`

    set_visible_segm(self, visible)

    @param visible: bool

  `def update(self) ‑> bool`

    update(self) -> bool Update segment information. You must call this function after modification of segment characteristics. Note that not all fields of segment structure may be modified directly, there are special functions to modify some fields.

    @return: success

  `def use64(self) ‑> bool`

    is_64bit(self) -> bool Is a 64-bit segment?

  ### Inherited members

  - `range_t`:
    - `clear`
    - `compare`
    - `contains`
    - `empty`
    - `extend`
    - `intersect`
    - `overlaps`
    - `size`
    - `thisown`