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Kernel+LibC+LibELF: Set stack size based on PT_GNU_STACK during execve

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Some programs explicitly ask for a different initial stack size than
what the OS provides. This is implemented in ELF by having a
PT_GNU_STACK header which has its p_memsz set to the amount that the
program requires. This commit implements this policy by reading the
p_memsz of the header and setting the main thread stack size to that.
ELF::Image::validate_program_headers ensures that the size attribute is
a reasonable value.
This commit is contained in:
sin-ack 2022-10-01 19:29:59 +00:00 • committed by Andrew Kaster
parent 3275015786
commit ef6921d7c7
9 changed files with 43 additions and 7 deletions
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3
Kernel/API/POSIX/sys/limits.h
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, sin-ack <sin-ack@protonmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -7,3 +8,5 @@
#pragma once
#define NGROUPS_MAX 32
#define PTHREAD_STACK_MIN (64 * 1024) // 64KiB