mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +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.
82 lines
3.7 KiB
C
82 lines
3.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 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/calls/internal.h"
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#include "libc/macros.h"
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#include "libc/nt/enum/offerpriority.h"
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#include "libc/nt/memory.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/struct/memoryrangeentry.h"
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#include "libc/sysv/consts/madv.h"
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#include "libc/sysv/errfuns.h"
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forceinline typeof(PrefetchVirtualMemory) *GetPrefetchVirtualMemory(void) {
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static bool once;
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static typeof(PrefetchVirtualMemory) *PrefetchVirtualMemory_;
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if (!once) {
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once = true;
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PrefetchVirtualMemory_ = /* win8.1+ */
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GetProcAddressModule("Kernel32.dll", "PrefetchVirtualMemory");
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}
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return PrefetchVirtualMemory_;
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}
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forceinline typeof(OfferVirtualMemory) *GetOfferVirtualMemory(void) {
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static bool once;
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static typeof(OfferVirtualMemory) *OfferVirtualMemory_;
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if (!once) {
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once = true;
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OfferVirtualMemory_ = /* win8.1+ */
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GetProcAddressModule("Kernel32.dll", "OfferVirtualMemory");
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}
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return OfferVirtualMemory_;
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}
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textwindows int madvise$nt(void *addr, size_t length, int advice) {
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uint32_t rangecount;
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struct NtMemoryRangeEntry ranges[1];
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if ((advice & (int)MADV_WILLNEED) == (int)MADV_WILLNEED ||
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(advice & (int)MADV_SEQUENTIAL) == (int)MADV_SEQUENTIAL) {
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typeof(PrefetchVirtualMemory) *fn = GetPrefetchVirtualMemory();
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if (fn) {
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ranges[0].VirtualAddress = addr;
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ranges[0].NumberOfBytes = length;
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rangecount = ARRAYLEN(ranges);
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if (fn(GetCurrentProcess(), &rangecount, ranges, 0)) {
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return 0;
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} else {
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return __winerr();
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}
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} else {
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return enosys();
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}
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} else if ((advice & (int)MADV_FREE) == (int)MADV_FREE) {
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typeof(OfferVirtualMemory) *fn = GetOfferVirtualMemory();
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if (fn) {
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if (fn(addr, length, kNtVmOfferPriorityNormal)) {
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return 0;
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} else {
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return __winerr();
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}
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} else {
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return enosys();
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}
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} else {
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return einval();
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}
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}
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