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This allows us to actually catch system calls and start to run user
space programs. That being said, the whole thing is still pretty
brittle, and the scheduler is not quite there yet.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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When creating the user space binaries I forgot about their proper names,
which is funny on its own. Anyways, let's get them the name they were
intended.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
alksjdlkajd
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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The given initrd is a CPIO archive of multiple ELF executables. We are
already able to parse the CPIO archive to detect where each file is
located, this commit adds the mapping for each ELF executable to the
corresponding task_struct.
Note that this is still heavily under construction, since we cannot
simply jump into the entry point of an executable as we have not yet
setup the proper layout from performing context switches.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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We expect a CPIO archive with the 'newc' format for the initrd. Parse
this archive from the given initrd address and fetch the address for
each ELF executable while also pairing which task correspond to which
ELF.
This commit leaves to do the actual parsing of the ELF file for each
task, while also leaving some string utilities to be refined.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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Introduce a sample `foo` program which already calls the
`write_and_block` system call which is yet to be implemented by this
kernel. Moreover, the same CPIO format is used for the initramfs as with
Linux, so we can pass it with QEMU without worries.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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