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