mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
f0600a898c
- Remove XD bit in page tables
- Fix cylinder+head+sector arithmetic
- Implement fstat() for serial file descriptors on metal
Here's how to boot an Actually Portable Executable in QEMU:
make -j12 o//tool/viz/deathstar.com
qemu-system-x86_64 -serial stdio -fda o//tool/viz/deathstar.com
Here's a screenshot of DEATHSTAR.COM booted in QEMU:
https://justine.lol/cosmopolitan/cosmo-metal-qemu.png
Thus metal support is in much better shape now, but still incomplete.
Only a few system calls have been polyfilled. To figure out which ones
your program needs, simply boot it in the blinkenlights emulator with a
breakpoint, and press CTRL-C to continue to the system call breakpoint.
If it doesn't break then you should be good. (Note: to emulate normally
you can press 'c' and use CTRL-T and ALT-T to tune the speed.)
m=tiny
make -j12 SILENT=0 MODE=$m \
o/$m/tool/build/blinkenlights.com \
o/$m/tool/viz/deathstar.com
o/$m/tool/build/blinkenlights.com \
-r -t -b systemfive.linux \
o/$m/tool/viz/deathstar.com
Thank @Theldus for the bug report that made this change possible.
Fixes #20 which explains this change further.
46 lines
2.3 KiB
ArmAsm
46 lines
2.3 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 sw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.source __FILE__
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/ Supplies basename(argv[0]) The GNU Way.
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.initbss 400,_init_program_invocation_short_name
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program_invocation_short_name:
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.quad 0
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.endobj program_invocation_short_name,globl
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.previous
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.init.start 400,_init_program_invocation_short_name
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push %rsi
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xor %eax,%eax
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test %r12d,%r12d # argc
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jz 2f
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mov (%r13),%rsi # argv[0]
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mov %rsi,%rcx
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1: lodsb
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cmp $'/,%al
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cmoveq %rsi,%rcx
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cmp $'\\,%al
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cmoveq %rsi,%rcx
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test %al,%al
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jnz 1b
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xchg %rcx,%rax
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pop %rsi
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2: stosq
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.init.end 400,_init_program_invocation_short_name
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