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revert decentralized init

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None of %r8 through %r11 was surviving intact up to the point of the
decentralized init call. Initializing early from %r8 works though.
This commit is contained in:
Jōshin 2023-12-19 16:15:22 +00:00
parent 89c4adad50
commit 140c6adeb4
No known key found for this signature in database
3 changed files with 2 additions and 35 deletions
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2
libc/crt/crt.S
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@ -62,6 +62,8 @@ _start:
// set operating system when already detected
1: mov %cl,__hostos(%rip)
mov %r8,__program_executable_name(%rip)
// get startup timestamp as early as possible
// its used by --strace flag and kprintf() %T
rdtsc

32
libc/nexgen32e/program_executable_name.S
View file

@ -1,32 +0,0 @@
/*-*- 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 2023 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"
#include "libc/notice.inc"
.initbss 300,_init_program_executable_name
// Global variable holding the binary that we are running as
__program_executable_name:
.quad 0
.endobj __program_executable_name,globl
.previous
.init.start 300,_init_program_executable_name
mov %r8,%rax
stosq
.init.end 300,_init_program_executable_name

3
libc/nexgen32e/program_executable_name2.c → libc/nexgen32e/program_executable_name.c
View file

@ -17,8 +17,5 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/runtime/runtime.h"
#ifndef __x86_64__
char *__program_executable_name;
#endif /* __x86_64__ */