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Simplify Apple CC support.

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* commands/i386/pc/drivemap_int13h.S: Use LOCAL when possible.
	Add 0 byte at the end not to have a symbol with empty target.
	* mmap/i386/pc/mmap_helper.S: Likewise.
	* genmk.rb: Ignore errors 2030 and 2050.
	* kern/i386/pc/startup.S: Use LOCAL when possible.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-03-27 00:04:14 +01:00
parent 8d2977bb7a
commit 969d1c782d
5 changed files with 58 additions and 86 deletions
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29
commands/i386/pc/drivemap_int13h.S
View file

@ -19,7 +19,7 @@
#include <grub/symbol.h>
#define INT13H_OFFSET(x) ((x) - EXT_C(grub_drivemap_handler))
#define INT13H_OFFSET(x) ((x) - LOCAL (base))
.code16
@ -27,6 +27,7 @@
/* The replacement int13 handler. Preserve all registers. */
FUNCTION(grub_drivemap_handler)
LOCAL (base):
/* Save %dx for future restore. */
push %dx
/* Push flags. Used to simulate interrupt with original flags. */
@ -35,12 +36,7 @@ FUNCTION(grub_drivemap_handler)
/* Map the drive number (always in DL). */
push %ax
push %bx
#ifdef APPLE_CC
grub_drivemap_mapstart_ofs = INT13H_OFFSET(EXT_C(grub_drivemap_mapstart))
movw $grub_drivemap_mapstart_ofs, %bx
#else
movw $INT13H_OFFSET(EXT_C(grub_drivemap_mapstart)), %bx
#endif
movw $INT13H_OFFSET(LOCAL (mapstart)), %bx
more_remaining:
movw %cs:(%bx), %ax
@ -66,12 +62,7 @@ not_found:
popf
pushf
#ifdef APPLE_CC
grub_drivemap_oldhandler_ofs = INT13H_OFFSET (EXT_C (grub_drivemap_oldhandler))
lcall *%cs:grub_drivemap_oldhandler_ofs
#else
lcall *%cs:INT13H_OFFSET (EXT_C (grub_drivemap_oldhandler))
#endif
lcall *%cs:INT13H_OFFSET (LOCAL (oldhandler))
push %bp
mov %sp, %bp
@ -94,11 +85,7 @@ norestore:
popf
pushf
#ifdef APPLE_CC
lcall *%cs:grub_drivemap_oldhandler_ofs
#else
lcall *%cs:INT13H_OFFSET (EXT_C (grub_drivemap_oldhandler))
#endif
lcall *%cs:INT13H_OFFSET (LOCAL (oldhandler))
push %bp
mov %sp, %bp
@ -111,9 +98,13 @@ norestore:
/* Far pointer to the old handler. Stored as a CS:IP in the style of real-mode
IVT entries (thus PI:SC in mem). */
VARIABLE(grub_drivemap_oldhandler)
LOCAL (oldhandler):
.word 0x0, 0x0
/* This label MUST be at the end of the copied block, since the installer code
reserves additional space for mappings at runtime and copies them over it. */
.align 2
.align 2
VARIABLE(grub_drivemap_mapstart)
LOCAL (mapstart):
.byte 0