Relocatable binary - Revision history

Jnc: how they are relocatable

2022-10-09T20:16:02Z

how they are relocatable

← Older revision		Revision as of 20:16, 9 October 2022
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	Larger programs are usually [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing a like number of '''relocatable binary''' modules containing the low-level [[binary]] [[instruction]]s and data 'understood' by a given [[Central Processing Unit\|CPU]]. These can later be [[linking\|linked]] together to produce an ~~[[object code\|~~executable binary]] object.		Larger programs are usually [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing a like number of '''relocatable binary''' modules, containing the low-level [[object code\|binary]] [[instruction]]s and data 'understood' by a given [[Central Processing Unit\|CPU]]. These modules, which can be easily modified to operate at any [[address]] in [[main memory]], can later be [[linking\|linked]] together to produce an executable binary object.

	In addition to the instructions (in binary form) and data, a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table'; a list of:		In addition to the instructions (in binary form) and data, a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table'; a list of:

Jnc: Make linking its own article

2021-10-26T00:33:30Z

Make linking its own article

← Older revision		Revision as of 00:33, 26 October 2021
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	Larger programs are usually [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing a like number of '''relocatable binary''' modules containing the low-level binary [[instruction]]s and data 'understood' by a given [[Central Processing Unit\|CPU]].		Larger programs are usually [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing a like number of '''relocatable binary''' modules containing the low-level [[binary]] [[instruction]]s and data 'understood' by a given [[Central Processing Unit\|CPU]]. These can later be [[linking\|linked]] together to produce an [[object code\|executable binary]] object.

	These ~~are then '''~~linked~~'''~~ together to produce an [[object code\|executable binary]] object~~. This involves two logical stages (although often the the software doing the linking, the '''linker''', merges them together, in actual operation).~~

	~~In the first, the linker must pick an [[address]] at which to place each binary module, and modify the binary of each module to function at that address.~~

	The second stage is one in which references from one module to names in another ('external references') are 'resolved', and the binary in the module which is making the external reference is modified to properly refer to the location in the module where the reference's target is to be found.

	In addition to the instructions (in binary form) and data, a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table'; a list of:		In addition to the instructions (in binary form) and data, a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table'; a list of:

Jnc: typo

2019-09-19T14:15:13Z

typo

← Older revision		Revision as of 14:15, 19 September 2019
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	In the first, the linker must pick an [[address]] at which to place each binary module, and modify the binary of each module to function at that address.		In the first, the linker must pick an [[address]] at which to place each binary module, and modify the binary of each module to function at that address.

	The second stage is one in which references from one module to names in another ('external references') are 'resolved, and the binary in the module which is making the external reference is modified to properly refer to the location in the module where the reference's target is to be found.		The second stage is one in which references from one module to names in another ('external references') are 'resolved', and the binary in the module which is making the external reference is modified to properly refer to the location in the module where the reference's target is to be found.

	In addition to the instructions (in binary form) and data, a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table'; a list of:		In addition to the instructions (in binary form) and data, a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table'; a list of:

Jnc: Clarify

2019-09-19T14:14:02Z

Clarify

← Older revision		Revision as of 14:14, 19 September 2019
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	Larger programs are [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing '''relocatable binary''' modules of the low-level binary 'understood' by a given [[Central Processing Unit\|CPU]]~~, which are then '''linked''' together to produce an [[object code\|executable binary]] object~~.		Larger programs are usually [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing a like number of '''relocatable binary''' modules containing the low-level binary [[instruction]]s and data 'understood' by a given [[Central Processing Unit\|CPU]].

	This involves two logical stages (although often the the software doing the linking, the '''linker''', merges them together, in actual operation).		These are then '''linked''' together to produce an [[object code\|executable binary]] object. This involves two logical stages (although often the the software doing the linking, the '''linker''', merges them together, in actual operation).

	In the first, the linker must pick an address at which to place each binary module, and modify the binary of each module to function at that address.		In the first, the linker must pick an [[address]] at which to place each binary module, and modify the binary of each module to function at that address.

	The second stage is one in which references from one module to names in another are 'resolved', and the binary in the module which is making the 'external' reference is modified to properly refer to the location in the module where the reference is to be found.		The second stage is one in which references from one module to names in another ('external references') are 'resolved, and the binary in the module which is making the external reference is modified to properly refer to the location in the module where the reference's target is to be found.

	In addition to the instructions (in binary form), a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table' (a list of i) all the names on all out-going references to other modules~~, and ii)~~ the names which this module contains within it); ~~and~~ also 'relocation' information, noting the words in this module which need to be modified during the linking process, and ~~what~~ exactly what type(s) of modifications are needed for each.		In addition to the instructions (in binary form) and data, a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table'; a list of:

			* all the names on all out-going references to other modules;
			* the names which this module contains within it;

			There is also 'relocation' information, noting the words in this module which need to be modified during the linking process, and exactly what type(s) of modifications are needed for each.

			{{semi-stub}}

	[[Category: Software Basics]]		[[Category: Software Basics]]

Jnc: +cat

2018-12-15T23:59:14Z

+cat

← Older revision		Revision as of 23:59, 15 December 2018
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	In addition to the instructions (in binary form), a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table' (a list of i) all the names on all out-going references to other modules, and ii) the names which this module contains within it); and also 'relocation' information, noting the words in this module which need to be modified during the linking process, and what exactly what type(s) of modifications are needed for each.		In addition to the instructions (in binary form), a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table' (a list of i) all the names on all out-going references to other modules, and ii) the names which this module contains within it); and also 'relocation' information, noting the words in this module which need to be modified during the linking process, and what exactly what type(s) of modifications are needed for each.

			[[Category: Software Basics]]

Jnc: av

2017-09-21T19:39:07Z

← Older revision		Revision as of 19:39, 21 September 2017
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	Larger programs are [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing '''relocatable binary''' modules of the low-level binary 'understood' by a given [[CPU]], which are then '''linked''' together to produce an [[object code\|executable binary]] object.		Larger programs are [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing '''relocatable binary''' modules of the low-level binary 'understood' by a given [[Central Processing Unit\|CPU]], which are then '''linked''' together to produce an [[object code\|executable binary]] object.

	This involves two logical stages (although often the the software doing the linking, the '''linker''', merges them together, in actual operation).		This involves two logical stages (although often the the software doing the linking, the '''linker''', merges them together, in actual operation).

Jnc: avoid redir

2017-09-09T15:48:23Z

avoid redir

← Older revision		Revision as of 15:48, 9 September 2017
Line 1:		Line 1:
	Larger programs are [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing '''relocatable binary''' modules of the low-level binary 'understood' by a given [[CPU]], which are then '''linked''' together to produce an [[executable binary]] object.		Larger programs are [[compiler\|compiled]] or [[assembler\|assembled]] from a series of smaller modules of [[source code]], producing '''relocatable binary''' modules of the low-level binary 'understood' by a given [[CPU]], which are then '''linked''' together to produce an [[object code\|executable binary]] object.

	This involves two logical stages (although often the the software doing the linking, the '''linker''', merges them together, in actual operation).		This involves two logical stages (although often the the software doing the linking, the '''linker''', merges them together, in actual operation).

Jnc: A good start

2017-08-08T01:46:52Z

A good start

New page

Larger programs are [[compiler|compiled]] or [[assembler|assembled]] from a series of smaller modules of [[source code]], producing '''relocatable binary''' modules of the low-level binary 'understood' by a given [[CPU]], which are then '''linked''' together to produce an [[executable binary]] object.

This involves two logical stages (although often the the software doing the linking, the '''linker''', merges them together, in actual operation).

In the first, the linker must pick an address at which to place each binary module, and modify the binary of each module to function at that address.

The second stage is one in which references from one module to names in another are 'resolved', and the binary in the module which is making the 'external' reference is modified to properly refer to the location in the module where the reference is to be found.

In addition to the instructions (in binary form), a relocatable binary module contains other information, needed for the linking process. It includes a 'symbol table' (a list of i) all the names on all out-going references to other modules, and ii) the names which this module contains within it); and also 'relocation' information, noting the words in this module which need to be modified during the linking process, and what exactly what type(s) of modifications are needed for each.