[ros-diffs] [tkreuzer] 52325: [FREELDR] - Instead of using the far jmp when switching to protected mode to go to the entry point, use a relative absolute jmp instruction, manually encoded - Remove the END from...
tkreuzer at svn.reactos.org
tkreuzer at svn.reactos.org
Fri Jun 17 23:44:07 UTC 2011
Author: tkreuzer
Date: Fri Jun 17 23:44:07 2011
New Revision: 52325
URL: http://svn.reactos.org/svn/reactos?rev=52325&view=rev
Log:
[FREELDR]
- Instead of using the far jmp when switching to protected mode to go to the entry point, use a relative absolute jmp instruction, manually encoded
- Remove the END from fathelp.inc, that was terminating the code
- fix code for ML
Modified:
trunk/reactos/boot/freeldr/freeldr/arch/realmode/fathelp.inc
trunk/reactos/boot/freeldr/freeldr/arch/realmode/helpers.inc
trunk/reactos/boot/freeldr/freeldr/arch/realmode/i386.S
trunk/reactos/boot/freeldr/freeldr/arch/realmode/int386.inc
trunk/reactos/boot/freeldr/freeldr/arch/realmode/pnp.inc
trunk/reactos/boot/freeldr/freeldr/arch/realmode/pxe.inc
Modified: trunk/reactos/boot/freeldr/freeldr/arch/realmode/fathelp.inc
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/realmode/fathelp.inc?rev=52325&r1=52324&r2=52325&view=diff
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/realmode/fathelp.inc [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/realmode/fathelp.inc [iso-8859-1] Fri Jun 17 23:44:07 2011
@@ -217,9 +217,8 @@
ret
-msgLoading: .asciz "Loading FreeLoader...\r\n"
+msgLoading: .asciz "Loading FreeLoader...", CR, LF
.org 510 // Pad to 510 bytes
.word HEX(0aa55) // BootSector signature
-END
Modified: trunk/reactos/boot/freeldr/freeldr/arch/realmode/helpers.inc
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/realmode/helpers.inc?rev=52325&r1=52324&r2=52325&view=diff
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/realmode/helpers.inc [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/realmode/helpers.inc [iso-8859-1] Fri Jun 17 23:44:07 2011
@@ -1,10 +1,10 @@
Empty8042:
- .word 0x00eb,0x00eb // jmp $+2, jmp $+2
- in al, 0x64
- cmp al, 0xff // legacy-free machine without keyboard
+ .word HEX(00eb), HEX(00eb) // jmp $+2, jmp $+2
+ in al, HEX(64)
+ cmp al, HEX(0ff) // legacy-free machine without keyboard
jz Empty8042_ret // controllers on Intel Macs read back 0xFF
- test al, 0x02
+ test al, 2
jnz Empty8042
Empty8042_ret:
ret
@@ -12,11 +12,11 @@
EnableA20:
pusha
call Empty8042
- mov al, 0xD1 // command write
- out 0x64, al
+ mov al, HEX(0D1) // command write
+ out HEX(064), al
call Empty8042
- mov al, 0xDF // A20 on
- out 0x60, al
+ mov al, HEX(0DF) // A20 on
+ out HEX(060), al
call Empty8042
popa
ret
@@ -46,9 +46,9 @@
writechr:
pushf
pusha
- mov ah, 0x0E
+ mov ah, HEX(0E)
xor bx, bx
- int 0x10
+ int HEX(10)
popa
popf
ret
Modified: trunk/reactos/boot/freeldr/freeldr/arch/realmode/i386.S
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/realmode/i386.S?rev=52325&r1=52324&r2=52325&view=diff
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/realmode/i386.S [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/realmode/i386.S [iso-8859-1] Fri Jun 17 23:44:07 2011
@@ -31,7 +31,7 @@
call EnableA20
/* Safe real mode entry point in shared memory */
- mov dword ptr [BSS_RealModeEntry], offset switch_to_real16
+ mov dword ptr ds:[BSS_RealModeEntry], offset switch_to_real16
/* Get address of optional header */
mov eax, dword ptr ds:[FREELDR_PE_BASE + IMAGE_DOS_HEADER_e_lfanew]
@@ -41,8 +41,8 @@
mov eax, dword ptr ds:[eax + IMAGE_OPTIONAL_HEADER_AddressOfEntryPoint]
add eax, FREELDR_PE_BASE
- /* Patch the long jump instruction */
- mov word ptr [pm_offset], ax
+ /* Save entry point */
+ mov dword ptr [pm_entrypoint], eax
jmp exit_to_protected
@@ -87,7 +87,12 @@
mov sp, word ptr ds:[stack16]
/* Load IDTR with real mode value */
+#ifdef _USE_ML
+ DB 0Fh, 01h, 1Eh
+ DW rmode_idtptr
+#else
lidt rmode_idtptr
+#endif
sti /* These are ok now */
@@ -108,7 +113,12 @@
mov word ptr ds:[stack16], sp
/* Load the GDT */
+#ifdef _USE_ML
+ DB 0Fh, 01h, 16h
+ DW rmode_idtptr
+#else
lgdt gdtptr
+#endif
/* Enable Protected Mode */
mov eax, cr0
@@ -116,14 +126,13 @@
mov cr0, eax
/* Clear prefetch queue & correct CS */
- .byte HEX(0ea) // jmp far PMODE_CS:entry_point
-pm_offset:
- .word 0 // receives address of PE entry point
- .word PMODE_CS
+ ljmp16 PMODE_CS, inpmode
+inpmode:
+ .byte HEX(0ff), HEX(25) // opcode of indirect jump
+ .word pm_entrypoint, 0
+pm_entrypoint:
+ .long 0 // receives address of PE entry point
nop
-// FIXME: use ljmp16 PMODE_CS:inpmode + hexed 32bit jump
-
-
callback_table:
.word Int386
@@ -174,15 +183,13 @@
/* GDT table pointer */
gdtptr:
.word HEX(27) /* Limit */
- .long gdt /* Base Address */
+ .word gdt, 0 /* Base Address */
/* Real-mode IDT pointer */
rmode_idtptr:
.word HEX(3ff) /* Limit */
.long 0 /* Base Address */
-//.org 1024
-
#include "int386.inc"
#include "pxe.inc"
#include "pnp.inc"
Modified: trunk/reactos/boot/freeldr/freeldr/arch/realmode/int386.inc
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/realmode/int386.inc?rev=52325&r1=52324&r2=52325&view=diff
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/realmode/int386.inc [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/realmode/int386.inc [iso-8859-1] Fri Jun 17 23:44:07 2011
@@ -34,9 +34,9 @@
/* Call the interrupt vector */
/*int Int386_vector*/
- .byte 0xcd
+ .byte HEX(0cd)
Int386_vector_opcode:
- .byte 0x00
+ .byte 00
/* Save the registers */
mov dword ptr cs:[BSS_RegisterSet + REGS_EAX], eax
Modified: trunk/reactos/boot/freeldr/freeldr/arch/realmode/pnp.inc
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/realmode/pnp.inc?rev=52325&r1=52324&r2=52325&view=diff
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/realmode/pnp.inc [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/realmode/pnp.inc [iso-8859-1] Fri Jun 17 23:44:07 2011
@@ -15,11 +15,11 @@
push 0
- call dword ptr [BSS_PnpBiosEntryPoint]
+ call dword ptr ds:[BSS_PnpBiosEntryPoint]
add sp, 12
movzx ecx, ax
- mov dword ptr [BSS_PnpResult], ecx
+ mov dword ptr ds:[BSS_PnpResult], ecx
ret
@@ -48,11 +48,11 @@
push 1
/* call entry point */
- call dword ptr [BSS_PnpBiosEntryPoint]
+ call dword ptr ds:[BSS_PnpBiosEntryPoint]
add sp, 14
movzx ecx, ax
- mov [BSS_PnpResult], ecx
+ mov dword ptr ds:[BSS_PnpResult], ecx
ret
Modified: trunk/reactos/boot/freeldr/freeldr/arch/realmode/pxe.inc
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/arch/realmode/pxe.inc?rev=52325&r1=52324&r2=52325&view=diff
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/arch/realmode/pxe.inc [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/arch/realmode/pxe.inc [iso-8859-1] Fri Jun 17 23:44:07 2011
@@ -26,8 +26,8 @@
push ax
mov ax, [BSS_PxeFunction]
push ax
- call dword ptr [BSS_PxeEntryPoint]
+ call dword ptr ds:[BSS_PxeEntryPoint]
add esp, 6
- mov [BSS_PxeResult], ax
+ mov word ptr ds:[BSS_PxeResult], ax
ret
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