mirror of
https://github.com/jart/cosmopolitan.git
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Add x86_64-linux-gnu emulator
I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
This commit is contained in:
Justine Tunney
parent
467504308a
commit
f4f4caab0e
1052 changed files with 65667 additions and 7825 deletions
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@ -17,11 +17,19 @@
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "dsp/core/twixt8.h"
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#include "dsp/scale/scale.h"
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#include "dsp/tty/quant.h"
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#include "dsp/tty/tty.h"
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#include "libc/assert.h"
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#include "libc/bits/bits.h"
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#include "libc/bits/safemacros.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/ioctl.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/calls/struct/winsize.h"
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#include "libc/conv/conv.h"
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#include "libc/dce.h"
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#include "libc/limits.h"
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#include "libc/log/check.h"
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#include "libc/log/log.h"
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@ -34,51 +42,128 @@
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#include "libc/str/str.h"
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#include "libc/sysv/consts/ex.h"
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#include "libc/sysv/consts/exit.h"
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#include "libc/sysv/consts/fileno.h"
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#include "libc/sysv/consts/madv.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/sysv/consts/termios.h"
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#include "libc/x/x.h"
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#include "third_party/getopt/getopt.h"
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#include "third_party/stb/stb_image.h"
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#define LERP(X, Y, P) (((X) + (SAR((P) * ((Y) - (X)), 8))) & 0xff)
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#include "tool/viz/lib/graphic.h"
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static struct Flags {
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const char *out;
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bool subpixel;
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bool unsharp;
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bool dither;
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bool ruler;
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long half;
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bool full;
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long width;
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long height;
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enum TtyBlocksSelection blocks;
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enum TtyQuantizationAlgorithm quant;
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} g_flags;
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static noreturn void PrintUsage(int rc, FILE *f) {
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fprintf(f, "Usage: %s%s", program_invocation_name, "\
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[FLAGS] [PATH]\n\
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\n\
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Flags:\n\
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FLAGS\n\
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\n\
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-o PATH output path\n\
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-w INT manual width\n\
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-w INT manual height\n\
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-4 unicode blocks\n\
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-a ansi color mode\n\
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-t true color mode\n\
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-2 use half blocks\n\
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-3 ibm cp437 blocks\n\
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-f display full size\n\
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-s unsharp sharpening\n\
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-x xterm256 color mode\n\
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-d hilbert curve dithering\n\
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-r display pixel ruler on sides\n\
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-p convert to subpixel layout\n\
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-v increases verbosity\n\
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-? shows this information\n\
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\n\
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EXAMPLES\n\
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\n\
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printimage.com -sxd lemurs.jpg # 256-color dither unsharp\n\
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\n\
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\n");
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exit(rc);
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}
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static int ParseNumberOption(const char *arg) {
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long x;
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x = strtol(arg, NULL, 0);
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if (!(1 <= x && x <= INT_MAX)) {
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fprintf(stderr, "invalid flexidecimal: %s\n\n", arg);
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exit(EXIT_FAILURE);
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}
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return x;
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}
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static void GetOpts(int *argc, char *argv[]) {
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int opt;
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struct winsize ws;
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g_flags.quant = kTtyQuantTrue;
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g_flags.blocks = IsWindows() ? kTtyBlocksCp437 : kTtyBlocksUnicode;
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if (*argc == 2 &&
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(strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-help") == 0)) {
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PrintUsage(EXIT_SUCCESS, stdout);
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}
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while ((opt = getopt(*argc, argv, "?vpo:")) != -1) {
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while ((opt = getopt(*argc, argv, "?vpfrtxads234o:w:h:")) != -1) {
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switch (opt) {
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case 'o':
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g_flags.out = optarg;
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break;
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case 'v':
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++g_loglevel;
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case 'd':
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g_flags.dither = true;
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break;
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case 's':
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g_flags.unsharp = true;
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break;
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case 'w':
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g_flags.width = ParseNumberOption(optarg);
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break;
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case 'h':
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g_flags.height = ParseNumberOption(optarg);
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break;
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case 'f':
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g_flags.full = true;
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break;
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case '2':
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g_flags.half = true;
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break;
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case 'r':
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g_flags.ruler = true;
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break;
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case 'p':
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g_flags.subpixel = true;
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break;
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case 'a':
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g_flags.quant = kTtyQuantAnsi;
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break;
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case 'x':
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g_flags.quant = kTtyQuantXterm256;
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break;
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case 't':
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g_flags.quant = kTtyQuantTrue;
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break;
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case '3':
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g_flags.blocks = kTtyBlocksCp437;
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break;
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case '4':
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g_flags.blocks = kTtyBlocksUnicode;
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break;
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case 'v':
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++g_loglevel;
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break;
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case '?':
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PrintUsage(EXIT_SUCCESS, stdout);
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default:
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@ -89,6 +174,16 @@ static void GetOpts(int *argc, char *argv[]) {
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if (!g_flags.out) g_flags.out = "-";
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argv[(*argc)++] = "-";
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}
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if (!g_flags.full && (!g_flags.width || !g_flags.width)) {
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ws.ws_col = 80;
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ws.ws_row = 24;
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if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) != -1 ||
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1) {
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g_flags.width = ws.ws_col * (1 + !g_flags.half);
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g_flags.height = ws.ws_row * 2;
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}
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}
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ttyquantsetup(g_flags.quant, kTtyQuantRgb, g_flags.blocks);
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}
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static unsigned char ChessBoard(unsigned y, unsigned x, unsigned char a,
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@ -104,15 +199,6 @@ static unsigned char OutOfBoundsBackground(unsigned y, unsigned x) {
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return ChessBoard(y, x, 40, 80);
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}
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static unsigned char Opacify(long yn, long xn, const unsigned char P[yn][xn],
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const unsigned char A[yn][xn], long y, long x) {
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if ((0 <= y && y < yn) && (0 <= x && x < xn)) {
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return LERP(AlphaBackground(y, x), P[y][x], A[y][x]);
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} else {
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return OutOfBoundsBackground(y, x);
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}
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}
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static void PrintRulerRight(long yn, long xn, long y, long x,
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bool *inout_didhalfy) {
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if (y == 0) {
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@ -133,8 +219,8 @@ static void PrintRulerRight(long yn, long xn, long y, long x,
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}
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static void PrintImageImpl(long syn, long sxn, unsigned char RGB[3][syn][sxn],
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long y0, long yn, long x0, long xn, bool rule,
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long dy, long dx) {
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long y0, long yn, long x0, long xn, long dy,
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long dx) {
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long y, x;
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bool didhalfy, didfirstx;
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unsigned char a[3], b[3];
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@ -157,31 +243,56 @@ static void PrintImageImpl(long syn, long sxn, unsigned char RGB[3][syn][sxn],
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b[2], dy > 1 ? u'▄' : u'▐');
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didfirstx = true;
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}
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if (rule) PrintRulerRight(yn, xn, y, x, &didhalfy);
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if (g_flags.ruler) {
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PrintRulerRight(yn, xn, y, x, &didhalfy);
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}
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}
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printf("\e[0m\n");
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}
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static void PrintImage(long syn, long sxn, unsigned char RGB[3][syn][sxn],
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long y0, long yn, long x0, long xn, bool rule) {
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PrintImageImpl(syn, sxn, RGB, y0, yn, x0, xn, rule, 2, 1);
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long y0, long yn, long x0, long xn) {
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PrintImageImpl(syn, sxn, RGB, y0, yn, x0, xn, 2, 1);
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}
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static void PrintImageLR(long syn, long sxn, unsigned char RGB[3][syn][sxn],
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long y0, long yn, long x0, long xn, bool rule) {
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PrintImageImpl(syn, sxn, RGB, y0, yn, x0, xn, rule, 1, 2);
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long y0, long yn, long x0, long xn) {
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PrintImageImpl(syn, sxn, RGB, y0, yn, x0, xn, 1, 2);
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}
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static void *Deblinterlace(long dyn, long dxn, unsigned char dst[3][dyn][dxn],
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long syn, long sxn,
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const unsigned char src[syn][sxn][4], long y0,
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long syn, long sxn, long scn,
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const unsigned char src[syn][sxn][scn], long y0,
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long yn, long x0, long xn) {
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long y, x;
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unsigned char c;
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for (y = y0; y < yn; ++y) {
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for (x = x0; x < xn; ++x) {
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dst[0][y][x] = src[y][x][0];
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dst[1][y][x] = src[y][x][1];
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dst[2][y][x] = src[y][x][2];
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switch (scn) {
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case 1:
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c = src[y][x][0];
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dst[0][y][x] = c;
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dst[1][y][x] = c;
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dst[2][y][x] = c;
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break;
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case 2:
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c = twixt8(AlphaBackground(y, x), src[y][x][0], src[y][x][1]);
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dst[0][y][x] = c;
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dst[1][y][x] = c;
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dst[2][y][x] = c;
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break;
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case 3:
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dst[0][y][x] = src[y][x][0];
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dst[1][y][x] = src[y][x][1];
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dst[2][y][x] = src[y][x][2];
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break;
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case 4:
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c = AlphaBackground(y, x);
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dst[0][y][x] = twixt8(c, src[y][x][0], src[y][x][3]);
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dst[1][y][x] = twixt8(c, src[y][x][1], src[y][x][3]);
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dst[2][y][x] = twixt8(c, src[y][x][2], src[y][x][3]);
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break;
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}
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}
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}
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return dst;
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@ -209,32 +320,44 @@ static void *DeblinterlaceSubpixelBgr(long dyn, long dxn,
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return dst;
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}
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static void ProcessImage(long syn, long sxn, unsigned char RGB[syn][sxn][4],
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long cn) {
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if (g_flags.subpixel) {
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PrintImageLR(
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syn, sxn * 3,
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DeblinterlaceSubpixelBgr(
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syn, sxn,
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gc(memalign(32, sizeof(unsigned char) * syn * sxn * 3 * 3)), syn,
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sxn, RGB, 0, syn, 0, sxn),
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0, syn, 0, sxn * 3, true);
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static void PrintImageSerious(long yn, long xn, unsigned char RGB[3][yn][xn],
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struct TtyRgb TTY[yn][xn], char *vt) {
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char *p;
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long y, x;
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struct TtyRgb bg = {0x12, 0x34, 0x56, 0};
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struct TtyRgb fg = {0x12, 0x34, 0x56, 0};
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if (g_flags.unsharp) unsharp(3, yn, xn, RGB, yn, xn);
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if (g_flags.dither) dither(yn, xn, RGB, yn, xn);
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for (y = 0; y < yn; ++y) {
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for (x = 0; x < xn; ++x) {
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TTY[y][x] = rgb2tty(RGB[0][y][x], RGB[1][y][x], RGB[2][y][x]);
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}
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}
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p = ttyraster(vt, (void *)TTY, yn, xn, bg, fg);
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p = stpcpy(p, "\r\e[0m");
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ttywrite(STDOUT_FILENO, vt, p - vt);
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}
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static void ProcessImage(long yn, long xn, unsigned char RGB[3][yn][xn]) {
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if (g_flags.half) {
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if (g_flags.subpixel) {
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PrintImageLR(yn, xn * 3, RGB, 0, yn, 0, xn * 3);
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} else {
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PrintImage(yn, xn, RGB, 0, yn, 0, xn);
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}
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} else {
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PrintImage(
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syn, sxn,
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Deblinterlace(syn, sxn,
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gc(memalign(32, sizeof(unsigned char) * syn * sxn * 3)),
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syn, sxn, RGB, 0, syn, 0, sxn),
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0, syn, 0, sxn, true);
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PrintImageSerious(
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yn, xn, RGB, gc(memalign(32, sizeof(struct TtyRgb) * yn * xn)),
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gc(memalign(32, ((yn * xn * strlen("\e[48;2;255;48;2;255m▄")) +
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(yn * strlen("\e[0m\r\n")) + 128))));
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}
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}
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void WithImageFile(const char *path,
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void fn(long syn, long sxn, unsigned char RGB[syn][sxn][4],
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long cn)) {
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void fn(long yn, long xn, unsigned char RGB[3][yn][xn])) {
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struct stat st;
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void *map, *data;
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int fd, yn, xn, cn;
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void *map, *data, *data2;
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int fd, yn, xn, cn, dyn, dxn;
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CHECK_NE(-1, (fd = open(path, O_RDONLY)), "%s", path);
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CHECK_NE(-1, fstat(fd, &st));
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CHECK_GT(st.st_size, 0);
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@ -243,17 +366,33 @@ void WithImageFile(const char *path,
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CHECK_NE(MAP_FAILED,
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(map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0)));
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CHECK_NOTNULL(
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(data = stbi_load_from_memory(map, st.st_size, &xn, &yn, &cn, 4)), "%s",
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path);
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(data = gc(stbi_load_from_memory(map, st.st_size, &xn, &yn, &cn, 0))),
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"%s", path);
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CHECK_NE(-1, munmap(map, st.st_size));
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CHECK_NE(-1, close(fd));
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fn(yn, xn, data, 4);
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free(data);
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if (g_flags.subpixel) {
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data = DeblinterlaceSubpixelBgr(yn, xn, gc(memalign(32, yn * xn * 4 * 3)),
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yn, xn, data, 0, yn, 0, xn);
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xn *= 3;
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} else {
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data = Deblinterlace(yn, xn, gc(memalign(32, yn * xn * 4)), yn, xn, cn,
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data, 0, yn, 0, xn);
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cn = 3;
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}
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if (g_flags.height && g_flags.width) {
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dyn = g_flags.height;
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dxn = g_flags.width;
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data = EzGyarados(3, dyn, dxn, gc(memalign(32, dyn * dxn * 3)), cn, yn, xn,
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data, 0, cn, dyn, dxn, yn, xn, 0, 0, 0, 0);
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yn = dyn;
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xn = dxn;
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}
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fn(yn, xn, data);
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}
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int main(int argc, char *argv[]) {
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int i;
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showcrashreports();
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cancolor();
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GetOpts(&argc, argv);
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stbi_set_unpremultiply_on_load(true);
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for (i = optind; i < argc; ++i) {
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