mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-30 08:18:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Get codebase completely working with LLVM

Browse source 
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.
This commit is contained in:
Justine Tunney 2021-02-08 09:19:00 -08:00
parent 0e36cb3ac4
commit e75ffde09e
4528 changed files with 7776 additions and 11640 deletions
Download patch file Download diff file Expand all files Collapse all files

2
examples/cplusplus.cc
View file

@ -48,6 +48,6 @@ int main(int argc, char *argv[]) {
for (int i = 0; i < min(64, argc); ++i) g_log.x()[i] += argc;
printf("%p %d %d %d\n", (void *)(intptr_t)g_log.x(), g_log.x()[0],
g_log.x()[0], g_log.x()[0]);
delete x;
delete[] x;
return 0;
}

16
examples/package/lib/myasm.S
View file

@ -1,13 +1,13 @@
#include "libc/macros.h"
/ Example assembly function.
/
/ @note param agnostic
/ @note we love stack frames
/ easiest way to do backtraces
/ somehow they usually make code faster
/ it's convention for keeping stack 16-byte aligned
/ cpus still devote much to pushing & popping b/c i386
// Example assembly function.
//
// @note param agnostic
// @note we love stack frames
// easiest way to do backtraces
// somehow they usually make code faster
// it's convention for keeping stack 16-byte aligned
// cpus still devote much to pushing & popping b/c i386
MyAsm: push %rbp
mov %rsp,%rbp
call MyPrint2

59
examples/tiny-raw-linux-tutorial.S
View file

@ -1,59 +0,0 @@
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
│vi: set et ft=asm ts=8 tw=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.h"
.privileged
/ Tiny Raw Linux Binary Tutorial
/
/ i.e. how to not use cosmopolitan runtimes at all
/ cosmopolitan basically abstracts this
/ except for all major platforms
/
/ make o//examples/raw-linux-hello.elf
/ o/examples/raw-linux-hello.elf # about 6kb
/
/ Next try C but with fancy build tuning
/
/ make -j8 -O \
/ MODE=tiny \
/ LDFLAGS+=-s \
/ CPPFLAGS+=-DIM_FEELING_NAUGHTY \
/ CPPFLAGS+=-DSUPPORT_VECTOR=0b00000001 \
/ o/tiny/examples/hello2.elf
/ o/tiny/examples/hello2.elf # about 8kb
/
/ @param rsp is [n,argv₀..argvₙ₋₁,0,envp₀..,0,auxv₀..,0,..]
/ @see also glibc static binaries which start at 800kb!!!
/ @see also go where interfaces sadly disempower ld prune
/ @see also the stl where bad linkage is due to tech debt
/ @note libc/elf/elf.lds can be tinier with page align off
/ @note gas is more powerful than nasm due to rms notation
/ @noreturn
_start: mov $12,%rdx # arg no. 3 is length
getstr "hello world\n",%rsi,%esi # arg no. 2 is memory
mov $1,%edi # arg no. 1 is stdout
mov $1,%eax # write()
syscall # libc/sysv/syscalls.sh
mov $0,%edi # arg no. 1 is success status
mov $0xE7,%eax # exit_group()
syscall # context switch
0: rep nop # basic blockading
jmp 0b
.endfn _start,globl
.source __FILE__