40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
#include "elf.h"
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#include "mmgr.h"
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#include "string.h"
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#include "types/status.h"
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const uint32_t elf_magic_number = 0x464c457f;
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int load_program(struct elf_file_header_t *elf)
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{
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struct elf_program_header_t *program_header = (struct elf_program_header_t*)((void*)elf + elf->phoffset);
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unsigned int count = elf->phcount;
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while(count > 0)
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{
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if(program_header->type == ELF_LOAD)
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{
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void *d = program_header->vaddr, *s = (void*)elf + program_header->offset;
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for(size_t n = 0; n < program_header->memsize; n += page_size)
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{
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physaddr_t page = reserve_page();
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if(page == ENOMEM)
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{
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return ENOMEM;
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}
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int status = map_page(d + n, page, PAGE_RW | PAGE_USERMODE | PAGE_EXECUTABLE);
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switch(status)
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{
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case ENOMEM:
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return status;
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case EOUTOFBOUNDS:
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return status;
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case ENONE:
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memcpy(d + n, s + n, n + page_size < program_header->memsize ? page_size : program_header->memsize - n);
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}
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}
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}
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count--;
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program_header = (struct elf_program_header_t*)((void*)program_header + elf->phsize);
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}
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return ENONE;
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} |