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mention Elf32_auxv[AT_EXECFN]

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John Reiser
2010-02-15 11:07:46 -08:00
parent 269cc91fd5
commit c5a8256500
1 changed files with 7 additions and 5 deletions
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doc/elf-to-mem.txt
+7 -5
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@@ -69,11 +69,13 @@ from the address space, then the Linux kernel erases the symlink
/proc/self/exe. Linux stores the pathname argument that was specified /proc/self/exe. Linux stores the pathname argument that was specified
to execve() immediately after the '\0' which terminates the character to execve() immediately after the '\0' which terminates the character
string of the last environment variable [as of execve()]. This is true string of the last environment variable [as of execve()]. This is true
for at least all Linux 2.6, 2.4, and 2.2 kernels. The pathname is not for at least all Linux 2.6, 2.4, and 2.2 kernels. Linux kernel 2.6.29
"bound" to the file as strongly as /proc/self/exe (the file may be changed and later records a pointer to that character string in
without affecting the pathname), but the pathname does provide some Elf32_auxv[AT_EXECFN]. The pathname is not "bound" to the file as
information. The pathname may be relative to the working directory, strongly as /proc/self/exe (the file may be changed without affecting
so look before any chdir(). the pathname), but the pathname does provide some information.
The pathname may be relative to the working directory, so look before
any chdir().
The Elf formats for Linux add an environment variable named " " [three The Elf formats for Linux add an environment variable named " " [three
spaces] which saves the results of readlink("/proc/self/exe",,) before spaces] which saves the results of readlink("/proc/self/exe",,) before