diff options
Diffstat (limited to 'src/arch/x86/boot.c')
| -rw-r--r-- | src/arch/x86/boot.c | 53 |
1 files changed, 25 insertions, 28 deletions
diff --git a/src/arch/x86/boot.c b/src/arch/x86/boot.c index 71b79fe12a..b23e322d6c 100644 --- a/src/arch/x86/boot.c +++ b/src/arch/x86/boot.c @@ -60,43 +60,40 @@ static void jmp_payload(void *entry, unsigned long buffer, unsigned long size) " push %1\n\t" " push %0\n\t" - ".intel_syntax noprefix\n\t" /* use iret to switch to 32-bit code segment */ - " xor rax,rax\n\t" - " mov ax, ss\n\t" - " push rax\n\t" - " mov rax, rsp\n\t" - " add rax, 8\n\t" - " push rax\n\t" + " xor %%rax,%%rax\n\t" + " mov %%ss, %%ax\n\t" + " push %%rax\n\t" + " mov %%rsp, %%rax\n\t" + " add $8, %%rax\n\t" + " push %%rax\n\t" " pushfq\n\t" - " push 0x10\n\t" - " lea rax,[rip+3]\n\t" - " push rax\n\t" + " push $0x10\n\t" + " lea 3(%%rip), %%rax\n\t" + " push %%rax\n\t" " iretq\n\t" ".code32\n\t" /* disable paging */ - " mov eax, cr0\n\t" - " btc eax, 31\n\t" - " mov cr0, eax\n\t" + " mov %%cr0, %%eax\n\t" + " btc $31, %%eax\n\t" + " mov %%eax, %%cr0\n\t" /* disable long mode */ - " mov ecx, 0xC0000080\n\t" + " mov $0xC0000080, %%ecx\n\t" " rdmsr\n\t" - " btc eax, 8\n\t" + " btc $8, %%eax\n\t" " wrmsr\n\t" - " pop eax\n\t" - " add esp, 4\n\t" - " pop ebx\n\t" - " add esp, 4\n\t" - " pop ecx\n\t" - - " add esp, 4\n\t" - " pop edx\n\t" - " add esp, 4\n\t" - " pop esi\n\t" - " add esp, 4\n\t" - - ".att_syntax prefix\n\t" + " pop %%eax\n\t" + " add $4, %%esp\n\t" + " pop %%ebx\n\t" + " add $4, %%esp\n\t" + " pop %%ecx\n\t" + + " add $4, %%esp\n\t" + " pop %%edx\n\t" + " add $4, %%esp\n\t" + " pop %%esi\n\t" + " add $4, %%esp\n\t" #endif /* Save the callee save registers... */ |