Add pseudoteletypewriter to emulator

https://justine.storage.googleapis.com/emulator628.mp4
This commit is contained in:
Justine Tunney 2020-08-26 23:08:08 -07:00
parent e86cff8ba0
commit 5aabacb361
94 changed files with 3245 additions and 2179 deletions

View file

@ -23,6 +23,11 @@
.source __FILE__
/ Calls global initialization functions.
/
/ @param r12 is argc
/ @param r13 is argv
/ @param r14 is environ
/ @param r15 is auxv
_construct:
push %rbp
mov %rsp,%rbp

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@ -43,8 +43,8 @@ static struct CxaAtexitBlocks {
*
* Destructors are called in reverse order. They won't be called if the
* program aborts or _exit() is called. Invocations of this function are
* usually generated by the C++ compiler. Behavior is limitless if you
* choose to link calloc() and free().
* usually generated by the C++ compiler. Behavior is limitless if some
* other module has linked calloc().
*
* @param fp is void(*)(T)
* @param arg is passed to callback
@ -78,8 +78,11 @@ int __cxa_atexit(void *fp, void *arg, void *pred) {
/**
* Triggers global destructors.
*
* They're called in LIFO order. If a destructor adds more destructors,
* then those destructors will be called immediately following, before
* iteration continues.
*
* @param pred can be null to match all
* @note reentrant emptor
*/
void __cxa_finalize(void *pred) {
unsigned i;

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@ -1,71 +0,0 @@
/*-*- 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
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "ape/lib/pc.h"
#include "libc/dce.h"
#include "libc/nexgen32e/nexgen32e.h"
#include "libc/nt/struct/context.h"
#include "libc/nt/thunk/msabi.h"
#define kNtContextXstate 0x00100040
#define kNtXstateAvx 2
#define kNtXstateMaskAvx (1ull << kNtXstateAvx)
static void EnableAvx(void) {
asm volatile("mov\t%%cr4,%%rax\n\t"
"or\t%0,%%rax\n\t"
"mov\t%%rax,%%cr4\n\t"
"xor\t%%ecx,%%ecx\n\t"
"xgetbv\n\t"
"or\t%1,%%eax\n\t"
"xsetbv"
: /* no outputs */
: "i"(CR4_OSXSAVE), "i"(XCR0_X87 | XCR0_SSE | XCR0_AVX)
: "rax", "rcx", "rdx", "memory", "cc");
}
static void EnableAvxOnWindows(void) {
/* typedef uint64_t (*getenabledxstatefeatures_f)(void) __msabi; */
/* typedef bool32 (*initializecontext_f)(void *buffer, uint32_t flags, */
/* struct NtContext **out_context, */
/* uint32_t *inout_buffersize) __msabi;
*/
/* typedef bool32 (*getxstatefeaturesmask_f)(struct NtContext * context, */
/* uint64_t * out_featuremask)
* __msabi; */
/* typedef bool32 (*setxstatefeaturesmask_f)(struct NtContext * context, */
/* uint64_t featuremask) __msabi; */
/* getenabledxstatefeatures_f GetEnabledXStateFeatures; */
/* initializecontext_f InitializeContext; */
/* getxstatefeaturesmask_f GetXStateFeaturesMask; */
/* setxstatefeaturesmask_f SetXStateFeaturesMask; */
}
/**
* Requests authorization from operating system to do 256-bit math.
* @assume avx cpuid check performed by caller
*/
int _init_enableavx(void) {
if (IsMetal()) {
EnableAvx();
} else if (IsWindows()) {
EnableAvxOnWindows();
}
return 0;
}

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@ -129,7 +129,7 @@ void *mmap(void *addr, size_t size, int prot, int flags, int fd, int64_t off) {
if (!CANONICAL(addr)) return VIP(einval());
if (!(!!(flags & MAP_ANONYMOUS) ^ (fd != -1))) return VIP(einval());
if (!(!!(flags & MAP_PRIVATE) ^ !!(flags & MAP_SHARED))) return VIP(einval());
if (!(IsWindows() && fd != -1)) size = ROUNDUP(size, FRAMESIZE);
if (fd != -1) size = ROUNDUP(size, FRAMESIZE);
if (flags & MAP_FIXED) {
if (UntrackMemoryIntervals(addr, size) == -1) {
return MAP_FAILED;

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@ -37,6 +37,7 @@ LIBC_RUNTIME_A_DIRECTDEPS = \
LIBC_BITS \
LIBC_CALLS \
LIBC_CONV \
LIBC_TINYMATH \
LIBC_ELF \
LIBC_FMT \
LIBC_NEXGEN32E \

View file

@ -22,6 +22,11 @@
#include "libc/macros.h"
/ Self-bootstraps process upon existence before calling main.
/
/ @param r12 is argc
/ @param r13 is argv
/ @param r14 is environ
/ @param r15 is auxv
_spawn: push %rbp
mov %rsp,%rbp