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6538e70b39
Declaring section of the form: .align 4 .section "kernel" .incbin "path-to-kernel" And defining a linker variable before the section output does not always seem to work. The linker seems to add padding even though .align directive comes before .section modified: SConstruct.loader modified: loader/linker.lds modified: loader/main.c
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
#include <elf/elf.h>
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#include <elf/elf32.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "arch.h"
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/* These symbols are defined by the linker script. */
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extern char _start_kernel[];
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extern char _end_kernel[];
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extern char _start_containers[];
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extern char _end_containers[];
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/* This is a kernel symbol exported to loader's linker script from kernel build */
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extern char bkpt_phys_to_virt[];
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/*
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void load_container_images(unsigned long start, unsigned long end)
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{
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struct elf_image *elf_img = (struct elf_image *)start;
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int nsect_headers;
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// Find all section headers
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}
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*/
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int load_elf_image(unsigned long **entry, void *filebuf)
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{
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if (!elf32_checkFile((struct Elf32_Header *)filebuf)) {
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**entry = (unsigned long)elf32_getEntryPoint((struct Elf32_Header *)filebuf);
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printf("Entry point: %lx\n", **entry);
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} else {
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printf("Not a valid elf image.\n");
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return -1;
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}
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if (!elf_loadFile(filebuf, 1)) {
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printf("Elf image seems valid, but unable to load.\n");
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return -1;
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}
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return 0;
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}
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int main(void)
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{
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unsigned long *kernel_entry;
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arch_init();
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printf("ELF Loader: Started.\n");
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printf("Loading the kernel...\n");
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load_elf_image(&kernel_entry, (void *)_start_kernel);
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printf("Loading containers...\n");
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// load_container_images(_start_containers, _end_containers)
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printf("elf-loader:\tkernel entry point is %lx\n", *kernel_entry);
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// arch_start_kernel(kernel_entry);
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// printf("elf-loader:\tKernel start failed!\n");
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return -1;
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}
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