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PR19871, description of --pie

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Say why we even mention shared libraries here (ET_DYN), and clarify
symbol resolution.  There are of course many other ways that PIEs
resemble PDEs more closely than shared libraries.

	PR 19871
	* ld.texi (-pie): Clarify.
This commit is contained in:
Alan Modra
2024-03-01 09:00:27 +10:30
parent f9771d0e80
commit d5c5b27095
1 changed files with 7 additions and 6 deletions
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13
ld/ld.texi
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@@ -2298,12 +2298,13 @@ the i386 PE and ELF targetted ports of the linker.
@item -pie
@itemx --pic-executable
@cindex position independent executables
Create a position independent executable. This is currently only supported on
ELF platforms. Position independent executables are similar to shared
libraries in that they are relocated by the dynamic linker to the virtual
address the OS chooses for them (which can vary between invocations). Like
normal dynamically linked executables they can be executed and symbols
defined in the executable cannot be overridden by shared libraries.
Create a position independent executable. This is currently only
supported on ELF platforms. Position independent executables are
relocated by the dynamic linker to the virtual address the OS chooses
for them, which can vary between invocations. They are marked ET_DYN
in the ELF file header, but differ from shared libraries in a number
of ways. In particular, defined symbols in a PIE by default can not
be overridden by another object as they can be in a shared library.
@kindex -no-pie
@item -no-pie