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Implement fork()!
This is quite cool! The syscall entry point plumbs the register dump down to sys$fork(), which uses it to set up the child process's TSS in order to resume execution right after the int 0x80 fork() call. :^) This works pretty well, although there is some problem with the kernel alias mappings used to clone the parent process's regions. If I disable the MM::release_page_directory() code, there's no problem. Probably there's a premature freeing of a physical page somehow.
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@ -47,6 +47,7 @@ enum Function {
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PosixGetpgrp = 0x2015,
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PosixTcsetpgrp = 0x2016,
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PosixTcgetpgrp = 0x2017,
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PosixFork = 0x2018,
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};
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void initialize();
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