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Fix metal bugs so deathstar.com runs in qemu (#20)
- 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/$m/tool/viz/deathstar.com Thank @Theldus for the bug report that made this change possible. Fixes #20 which explains this change further.
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@ -27,10 +27,14 @@
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int nanosleep(const struct timespec *req, struct timespec *rem) {
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if (!req) return efault();
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if (!IsWindows()) {
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if (!IsXnu()) {
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return nanosleep$sysv(req, rem);
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if (!IsMetal()) {
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if (!IsXnu()) {
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return nanosleep$sysv(req, rem);
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} else {
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return nanosleep$xnu(req, rem);
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}
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} else {
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return nanosleep$xnu(req, rem);
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return enosys(); /* TODO: Sleep on Metal */
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}
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} else {
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return nanosleep$nt(req, rem);
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