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multiboot1: add support for 64-bit ELFs

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This commit is contained in:
Kacper Słomiński 2021-06-29 15:51:20 +02:00
parent 9115bc7b50
commit 6bb204bbd9
1 changed files with 17 additions and 4 deletions
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21
stage23/protos/multiboot1.c
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@ -53,13 +53,26 @@ void multiboot1_load(char *config, char *cmdline) {
if (header.flags & (1 << 16)) if (header.flags & (1 << 16))
panic("multiboot1: Aout kludge not supported"); panic("multiboot1: Aout kludge not supported");
if (elf_bits(kernel) != 32) int bits = elf_bits(kernel);
panic("multiboot1: Kernel binary must be 32-bit");
uint32_t entry_point = 0; uint32_t entry_point = 0;
if (elf32_load(kernel, (uint32_t *)&entry_point, MEMMAP_USABLE)) switch (bits) {
panic("multiboot1: ELF32 load failure"); case 32:
if (elf32_load(kernel, &entry_point, MEMMAP_USABLE))
panic("multiboot1: ELF32 load failure");
break;
case 64: {
uint64_t e;
if (elf64_load(kernel, &e, NULL, MEMMAP_USABLE, false, true))
panic("multiboot1: ELF64 load failure");
entry_point = e;
break;
}
default:
panic("multiboot1: Invalid ELF file bitness");
}
uint32_t n_modules; uint32_t n_modules;