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Make terminal ui binaries work well everywhere

Browse source 
Here's some screenshots of an emulator tui program that was compiled on
Linux, then scp'd it to Windows, Mac, and FreeBSD.

https://justine.storage.googleapis.com/blinkenlights-cmdexe.png
https://justine.storage.googleapis.com/blinkenlights-imac.png
https://justine.storage.googleapis.com/blinkenlights-freebsd.png
https://justine.storage.googleapis.com/blinkenlights-lisp.png

How is this even possible that we have a nontrivial ui binary that just
works on Mac, Windows, Linux, and BSD? Surely a first ever achievement.

Fixed many bugs. Bootstrapped John McCarthy's metacircular evaluator on
bare metal in half the size of Altair BASIC (about 2.5kb) and ran it in
emulator for fun and profit.
This commit is contained in:
Justine Tunney 2020-10-10 21:18:53 -07:00
parent 680daf1210
commit 9e3e985ae5
276 changed files with 7026 additions and 3790 deletions
Download patch file Download diff file Expand all files Collapse all files

67
tool/build/lib/memory.c
View file

@ -31,39 +31,54 @@
#include "tool/build/lib/throw.h"
void SetReadAddr(struct Machine *m, int64_t addr, uint32_t size) {
m->readaddr = addr;
m->readsize = size;
if (size) {
m->readaddr = addr;
m->readsize = size;
}
}
void SetWriteAddr(struct Machine *m, int64_t addr, uint32_t size) {
m->writeaddr = addr;
m->writesize = size;
if (size) {
m->writeaddr = addr;
m->writesize = size;
}
}
void *FindReal(struct Machine *m, int64_t v) {
uint64_t *p;
unsigned skew;
unsigned char i;
skew = v & 0xfff;
v &= -0x1000;
void *FindReal(struct Machine *m, int64_t virt) {
uint8_t *host;
uint64_t real, pte, *pt;
unsigned skew, level, i;
if (!(-0x800000000000 <= virt && virt < 0x800000000000)) {
return NULL;
}
skew = virt & 0xfff;
virt &= -0x1000;
for (i = 0; i < ARRAYLEN(m->tlb); ++i) {
if (m->tlb[i].v == v && m->tlb[i].r) {
return (char *)m->tlb[i].r + skew;
if (m->tlb[i].virt == virt && m->tlb[i].host) {
return m->tlb[i].host + skew;
}
}
for (p = m->cr3, i = 39; i >= 12; i -= 9) {
if (IsValidPage(p[(v >> i) & 511])) {
p = UnmaskPageAddr(p[(v >> i) & 511]);
} else {
level = 39;
real = m->cr3;
for (;;) {
if (real + 0x1000 > m->real.n) {
return NULL;
}
host = m->real.p + real;
if (level < 12) break;
pt = (uint64_t *)host;
pte = pt[(virt >> level) & 511];
if (!(pte & 1)) {
return NULL;
}
real = pte & 0x00007ffffffff000;
level -= 9;
}
m->tlbindex = (m->tlbindex + 1) & (ARRAYLEN(m->tlb) - 1);
m->tlb[m->tlbindex] = m->tlb[0];
m->tlb[0].r = p;
m->tlb[0].v = ROUNDDOWN(v, 0x1000);
DCHECK_NOTNULL(p);
return (char *)p + skew;
m->tlb[0].host = host;
m->tlb[0].virt = virt;
return host + skew;
}
void *ResolveAddress(struct Machine *m, int64_t v) {
@ -196,7 +211,7 @@ void *LoadStr(struct Machine *m, int64_t addr) {
if (!addr) return NULL;
if (!(page = FindReal(m, addr))) return NULL;
if ((p = memchr(page, '\0', have))) {
SetReadAddr(m, addr, p - page);
SetReadAddr(m, addr, p - page + 1);
return page;
}
CHECK_LT(m->freelist.i, ARRAYLEN(m->freelist.p));
@ -205,7 +220,7 @@ void *LoadStr(struct Machine *m, int64_t addr) {
for (;;) {
if (!(page = FindReal(m, addr + have))) break;
if ((p = memccpy(copy + have, page, '\0', 0x1000))) {
SetReadAddr(m, addr, have + (p - (copy + have)));
SetReadAddr(m, addr, have + (p - (copy + have)) + 1);
return (m->freelist.p[m->freelist.i++] = copy);
}
have += 0x1000;
@ -217,19 +232,19 @@ void *LoadStr(struct Machine *m, int64_t addr) {
}
void *LoadBuf(struct Machine *m, int64_t addr, size_t size) {
char *buf, *copy;
size_t have, need;
char *buf, *copy, *page;
have = 0x1000 - (addr & 0xfff);
if (!addr) return NULL;
if (!(buf = FindReal(m, addr))) return NULL;
if (size > have) {
CHECK_LT(m->freelist.i, ARRAYLEN(m->freelist.p));
if (!(copy = malloc(size))) return NULL;
memcpy(copy, buf, have);
buf = memcpy(copy, buf, have);
do {
need = MIN(0x1000, size - have);
if ((buf = FindReal(m, addr + have))) {
memcpy(copy + have, buf, need);
if ((page = FindReal(m, addr + have))) {
memcpy(copy + have, page, need);
have += need;
} else {
free(copy);