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Kernel: Make kernel symbols available much earlier in the boot process

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This adds a new section .ksyms at the end of the linker map, reserves
5MiB for it (which are after end_of_kernel_image so they get re-used
once MemoryManager is initialized) and then embeds the symbol map into
the kernel binary with objcopy. This also shrinks the .ksyms section to
the real size of the symbol file (around 900KiB at the moment).

By doing this we can make the symbol map available much earlier in the
boot process, i.e. even before VFS is available.
This commit is contained in:
Gunnar Beutner 2021-07-14 21:04:18 +02:00 • committed by Andreas Kling
parent 5a44a0b9f4
commit 7236584132
5 changed files with 28 additions and 18 deletions
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4
Kernel/init.cpp
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@ -123,6 +123,8 @@ extern "C" [[noreturn]] UNMAP_AFTER_INIT void init()
kmalloc_init();
slab_alloc_init();
load_kernel_symbol_table();
ConsoleDevice::initialize();
s_bsp_processor.initialize(0);
@ -264,8 +266,6 @@ void init_stage2(void*)
Process::current()->set_root_directory(VirtualFileSystem::the().root_custody());
load_kernel_symbol_table();
// Switch out of early boot mode.
g_in_early_boot = false;