diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/i386/image/bootsector.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/arch/i386/image/bootsector.c b/src/arch/i386/image/bootsector.c index 289be7d70..faf21c6fc 100644 --- a/src/arch/i386/image/bootsector.c +++ b/src/arch/i386/image/bootsector.c @@ -80,9 +80,22 @@ int call_bootsector ( unsigned int segment, unsigned int offset, "movw %%ss, %%ax\n\t" "movw %%ax, %%cs:saved_ss\n\t" "movw %%sp, %%cs:saved_sp\n\t" - /* Jump to boot sector */ + /* Prepare jump to boot sector */ "pushw %%bx\n\t" "pushw %%di\n\t" + /* Clear all registers */ + "xorl %%eax, %%eax\n\t" + "xorl %%ebx, %%ebx\n\t" + "xorl %%ecx, %%ecx\n\t" + "xorl %%edx, %%edx\n\t" + "xorl %%esi, %%esi\n\t" + "xorl %%edi, %%edi\n\t" + "xorl %%ebp, %%ebp\n\t" + "movw %%ax, %%ds\n\t" + "movw %%ax, %%es\n\t" + "movw %%ax, %%fs\n\t" + "movw %%ax, %%gs\n\t" + /* Jump to boot sector */ "sti\n\t" "lret\n\t" /* Preserved variables */ |