diff options
| author | Marvin Borner | 2020-06-27 23:37:27 +0200 |
|---|---|---|
| committer | Marvin Borner | 2020-06-27 23:37:27 +0200 |
| commit | cfb7c8850744b765d04ec54fed1007bf69e4d3c2 (patch) | |
| tree | 129d0ecd94684b33cfd31c45078c11af1a5b809d /src/entry.asm | |
| parent | fde4503bbc921bd839b8562fee5d75a85a1f07b0 (diff) | |
Lea is awesome
The operation of course, not the name
Diffstat (limited to 'src/entry.asm')
| -rw-r--r-- | src/entry.asm | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/src/entry.asm b/src/entry.asm index 34d11cf..7fb3f27 100644 --- a/src/entry.asm +++ b/src/entry.asm @@ -31,8 +31,8 @@ %define EXT2_COUNT_OFFSET 0x1c ; Inode offset of number of data blocks %define EXT2_POINTER_OFFSET 0x28 ; Inode offset of first data pointer %define EXT2_INODE_OFFSET 0x00 ; Dirent offset of inode number -%define EXT2_FILENAME_OFFSET 0x08 ; Dirent offset of file name %define EXT2_ENTRY_LENGTH_OFFSET 0x04 ; Dirent offset of entry length +%define EXT2_FILENAME_OFFSET 0x08 ; Dirent offset of file name %define EXT2_SIG 0xef53 ; Signature %define EXT2_DIR 0x4000 ; Directory indicator %define EXT2_REG 0x8000 ; Regular file indicator @@ -187,8 +187,7 @@ stage_two: ; Find boot directory ; TODO: Fix endless loop when not found .boot_dir_loop: - mov si, bx ; First comparison string - add si, EXT2_FILENAME_OFFSET ; Set pointer to filename + lea si, [bx + EXT2_FILENAME_OFFSET] ; First comparison string mov di, boot_dir_name ; Second comparison string mov cx, boot_dir_name_len ; String length rep cmpsb ; Compare strings @@ -225,8 +224,7 @@ stage_two: ; Find kernel .kernel_file_loop: - mov si, bx ; First comparison string - add si, EXT2_FILENAME_OFFSET ; Set pointer to filename + lea si, [bx + EXT2_FILENAME_OFFSET] ; First comparison string mov di, kernel_file_name ; Second comparison string mov cx, kernel_file_name_len ; String length rep cmpsb ; Compare strings @@ -235,8 +233,7 @@ stage_two: jmp .kernel_file_loop ; Jump to next dirent! .found_kernel: - mov si, bx ; First comparison string - add si, EXT2_FILENAME_OFFSET ; Set pointer to filename + lea si, [bx + EXT2_FILENAME_OFFSET] ; First comparison string call print jmp $ |