6f7dd7fc05
CDB seemed to be too simple for the needs of init, and squashfs is too laden with design choices to work around Linux's APIs. This commit adds creation of an initrd image of a new format I've called `j6romfs`. Note that this commit currently does not work! The initrd-reading code still needs to be added.
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
#include <uefi/boot_services.h>
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#include <uefi/types.h>
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#include "bootconfig.h"
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#include "error.h"
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#include "fs.h"
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#include "status.h"
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namespace boot {
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constexpr uint64_t jsixboot = 0x746f6f627869736a; // "jsixboot"
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static const wchar_t *
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read_string(util::buffer &data)
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{
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uint16_t size = *util::read<uint16_t>(data);
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const wchar_t *string = reinterpret_cast<const wchar_t*>(data.pointer);
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data += size;
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return string;
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}
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static void
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read_descriptor(descriptor &e, util::buffer &data)
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{
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e.flags = static_cast<desc_flags>(*util::read<uint16_t>(data));
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e.path = read_string(data);
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}
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bootconfig::bootconfig(util::buffer data, uefi::boot_services *bs)
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{
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status_line status {L"Loading boot config"};
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if (*util::read<uint64_t>(data) != jsixboot)
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error::raise(uefi::status::load_error, L"Bad header in jsix_boot.dat");
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const uint8_t version = *util::read<uint8_t>(data);
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if (version != 1)
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error::raise(uefi::status::incompatible_version, L"Bad version in jsix_boot.dat");
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uint8_t num_panics = *util::read<uint8_t>(data);
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m_flags = *util::read<uint16_t>(data);
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read_descriptor(m_kernel, data);
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read_descriptor(m_init, data);
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m_initrd = read_string(data);
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m_panics.count = num_panics;
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m_panics.pointer = new descriptor [num_panics];
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for (unsigned i = 0; i < num_panics; ++i)
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read_descriptor(m_panics[i], data);
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}
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} // namespace boot
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