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limine-install: Make sure stage 2 chunks are sector aligned

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This commit is contained in:
mintsuki 2021-03-04 12:29:59 +01:00
parent f26b6045a7
commit 5dc8f48d6c
2 changed files with 8 additions and 3 deletions
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9
limine-install.c
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@ -10,6 +10,8 @@
#include <fcntl.h>
#include <unistd.h>
#define DIV_ROUNDUP(a, b) (((a) + ((b) - 1)) / (b))
struct gpt_table_header {
// the head
char signature[8];
@ -318,8 +320,11 @@ int main(int argc, char *argv[]) {
}
size_t stage2_size = bootloader_file_size - 512;
uint16_t stage2_size_a = stage2_size / 2 + stage2_size % 2;
uint16_t stage2_size_b = stage2_size / 2;
size_t stage2_sects = DIV_ROUNDUP(stage2_size, 512);
uint16_t stage2_size_a = (stage2_sects / 2) * 512 + (stage2_sects % 2 ? 512 : 0);
uint16_t stage2_size_b = (stage2_sects / 2) * 512;
// Default split of stage2 for MBR (consecutive in post MBR gap)
uint64_t stage2_loc_a = 512;

2
stage1/hdd/disk.asm
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@ -55,7 +55,7 @@ read_sectors:
; EBP:EAX address to EAX LBA sector
div ebp
mov dword [si+8], eax
mov dword [si+12], edx
mov dword [si+12], 0
pop dx