vbatts/grub
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2009-06-04 Vladimir Serbinenko <phcoder@gmail.com>

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Absolute addressing through constant with Apple's cc

	* kern/i386/pc/startup.S: Define necessary constants
	and address through it when using ABS with Apple's CC
	* boot/i386/pc/diskboot.S: likewise
	* boot/i386/pc/boot.S: likewise
	* boot/i386/pc/lnxboot.S: likewise
	* boot/i386/pc/cdboot.S: likewise
	* mmap/i386/pc/mmap_helper.S: likewise
	* commands/i386/pc/drivemap_int13h.S: likewise
This commit is contained in:
phcoder 2009-06-04 20:01:19 +00:00
parent 2b167a7218
commit 3e32590112
8 changed files with 214 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

32
mmap/i386/pc/mmap_helper.S
View file

@ -28,7 +28,12 @@ VARIABLE(grub_machine_mmaphook_int12)
push %ds
push %cs
pop %ds
#ifdef APPLE_CC
grub_machine_mmaphook_kblow_rel = DS (EXT_C (grub_machine_mmaphook_kblow))
movw (grub_machine_mmaphook_kblow_rel), %ax
#else
movw DS (EXT_C (grub_machine_mmaphook_kblow)), %ax
#endif
pop %ds
iret
@ -53,8 +58,15 @@ e801:
push %ds
push %cs
pop %ds
#ifdef APPLE_CC
grub_machine_mmaphook_kbin16mb_rel = DS (EXT_C (grub_machine_mmaphook_kbin16mb))
grub_machine_mmaphook_64kbin4gb_rel = DS (EXT_C (grub_machine_mmaphook_64kbin4gb))
movw (grub_machine_mmaphook_kbin16mb_rel), %ax
movw (grub_machine_mmaphook_64kbin4gb_rel), %bx
#else
movw DS (EXT_C (grub_machine_mmaphook_kbin16mb)), %ax
movw DS (EXT_C (grub_machine_mmaphook_64kbin4gb)), %bx
#endif
movw %ax, %cx
movw %bx, %dx
pop %ds
@ -66,26 +78,42 @@ h88:
push %ds
push %cs
pop %ds
#ifdef APPLE_CC
movw (grub_machine_mmaphook_kbin16mb_rel), %ax
#else
movw DS (EXT_C (grub_machine_mmaphook_kbin16mb)), %ax
#endif
pop %ds
clc
iret
e820:
#ifdef APPLE_CC
mmaphook_mmap_rel = DS(mmaphook_mmap)
mmaphook_mmap_num_rel = DS(EXT_C(grub_machine_mmaphook_mmap_num))
#endif
popf
push %ds
push %cs
pop %ds
cmpw $20, %cx
jb errexit
#ifdef APPLE_CC
cmpw (mmaphook_mmap_num_rel), %bx
#else
cmpw DS (EXT_C (grub_machine_mmaphook_mmap_num)), %bx
#endif
jae errexit
cmp $0x534d4150, %edx
jne errexit
push %si
push %di
movw $20, %cx
#ifdef APPLE_CC
movl $(mmaphook_mmap_rel), %esi
#else
movw $(DS(mmaphook_mmap)), %si
#endif
mov %bx, %ax
imul $20, %ax
add %ax, %si
@ -94,7 +122,11 @@ e820:
pop %si
movl $20, %ecx
inc %bx
#ifdef APPLE_CC
cmpw (mmaphook_mmap_num_rel), %bx
#else
cmpw DS(EXT_C(grub_machine_mmaphook_mmap_num)), %bx
#endif
jb noclean
xor %bx, %bx
noclean: