cosmopolitan/libc/intrin/stackchkguard.S

/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8     -*-│
│ vi: set noet ft=asm ts=8 sw=8 fenc=utf-8                                 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"

//	Canary for -fstack-protector.
//
//	This global is referenced by synthetic code generated by GCC.
//	The -mstack-protector-guard=global flag might need to be passed.
//
//	@note	this value is protected by piro
	.initbss 200,_init___stack_chk_guard
__stack_chk_guard:
	.quad	0
	.endobj	__stack_chk_guard,globl
	.previous

	.init.start 301,_init___stack_chk_guard
	rdtsc
	stosl
	xchg	%edx,%eax
	stosl
	.init.end 301,_init___stack_chk_guard
Polish up repository and other revisions 2020-06-16 13:38:43 +00:00			`/-- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│`
Fix more vi modelines (#1006) * modelines: tw -> sw shiftwidth, not textwidth. * space-surround modelines * fix irregular modelines * Fix modeline in titlegen.c 2023-12-13 07:28:11 +00:00			`│ vi: set noet ft=asm ts=8 sw=8 fenc=utf-8 :vi │`
Initial import 2020-06-15 14:18:57 +00:00			`╞══════════════════════════════════════════════════════════════════════════════╡`
			`│ Copyright 2020 Justine Alexandra Roberts Tunney │`
			`│ │`
Change license 2020-12-28 01:18:44 +00:00			`│ Permission to use, copy, modify, and/or distribute this software for │`
			`│ any purpose with or without fee is hereby granted, provided that the │`
			`│ above copyright notice and this permission notice appear in all copies. │`
Initial import 2020-06-15 14:18:57 +00:00			`│ │`
Change license 2020-12-28 01:18:44 +00:00			`│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │`
			`│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │`
			`│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │`
			`│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │`
			`│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │`
			`│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │`
			`│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │`
			`│ PERFORMANCE OF THIS SOFTWARE. │`
Initial import 2020-06-15 14:18:57 +00:00			`╚─────────────────────────────────────────────────────────────────────────────*/`
Remove more nonstandard stuff from cosmopolitan.h Fixes #61 2021-03-01 07:42:35 +00:00			`#include "libc/macros.internal.h"`
Initial import 2020-06-15 14:18:57 +00:00
Get codebase completely working with LLVM You can now build Cosmopolitan with Clang: make -j8 MODE=llvm o/llvm/examples/hello.com The assembler and linker code is now friendly to LLVM too. So it's not needed to configure Clang to use binutils under the hood. If you love LLVM then you can now use pure LLVM. 2021-02-08 17:19:00 +00:00			`// Canary for -fstack-protector.`
			`//`
			`// This global is referenced by synthetic code generated by GCC.`
			`// The -mstack-protector-guard=global flag might need to be passed.`
			`//`
			`// @note this value is protected by piro`
Add x86_64-linux-gnu emulator I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4 2020-08-25 11:23:25 +00:00			`.initbss 200,_init___stack_chk_guard`
Initial import 2020-06-15 14:18:57 +00:00			`__stack_chk_guard:`
			`.quad 0`
			`.endobj __stack_chk_guard,globl`
			`.previous`

			`.init.start 301,_init___stack_chk_guard`
Add x86_64-linux-gnu emulator I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4 2020-08-25 11:23:25 +00:00			`rdtsc`
			`stosl`
			`xchg %edx,%eax`
			`stosl`
Initial import 2020-06-15 14:18:57 +00:00			`.init.end 301,_init___stack_chk_guard`