[ros-diffs] [tkreuzer] 48318: [FREELDR] - Move all 16 bit code to .text16 section - Fix linking issues with x86_16_SwitchToLong, by using a relative call - Align pagetables by page size - Add mainCRTStartup entry point freeldr now starts again
tkreuzer at svn.reactos.org
tkreuzer at svn.reactos.org
Tue Jul 27 21:49:20 UTC 2010
Author: tkreuzer
Date: Tue Jul 27 21:49:19 2010
New Revision: 48318
URL: http://svn.reactos.org/svn/reactos?rev=48318&view=rev
Log:
[FREELDR]
- Move all 16 bit code to .text16 section
- Fix linking issues with x86_16_SwitchToLong, by using a relative call
- Align pagetables by page size
- Add mainCRTStartup entry point
freeldr now starts again
Modified:
branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/arch.S
branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/fathelp.S
branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/i386pnp.S
branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/int386.S
branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/mb.S
branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr.rbuild
branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr_amd64.lnk
Modified: branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/arch.S
URL: http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/arch.S?rev=48318&r1=48317&r2=48318&view=diff
==============================================================================
--- branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/arch.S [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/arch.S [iso-8859-1] Tue Jul 27 21:49:19 2010
@@ -1,11 +1,10 @@
.intel_syntax noprefix
-.text
-.code16
#define ASM
#include <arch.h>
-//.org 0x8000
+.code16
+.section .text16, "x"
.global RealEntryPoint
RealEntryPoint:
@@ -284,6 +283,7 @@
jmp LMODE_CS:offset LongCat //Load CS with 64 bit segment and flush the instruction cache
.code64
+.text
LongCat:
/* Set up 64 bit stack */
mov rsp, stack64
@@ -378,6 +378,7 @@
/** Some data *****************************************************************/
+.text
.code64
stack16:
@@ -449,6 +450,6 @@
/* Need to include them here, because of linking issues between 64 / 16 bit */
//#include "debug16.S"
#include "int386.S"
-#include "boot.S"
+//#include "boot.S"
#include "i386pnp.S"
Modified: branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/fathelp.S
URL: http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/fathelp.S?rev=48318&r1=48317&r2=48318&view=diff
==============================================================================
--- branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/fathelp.S [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/fathelp.S [iso-8859-1] Tue Jul 27 21:49:19 2010
@@ -4,9 +4,8 @@
.intel_syntax noprefix
-.text
-
.code16
+.section .text16, "x"
#define BootSectorStackTop 0x7bf2
#define DataAreaStartHigh 0x2
@@ -48,13 +47,14 @@
// encode a jmp instruction to jump to 0000:8200
//.org 0x8000
-.global _mainCRTStartup // For Mingw32 builds where the linker looks for this symbol
-_mainCRTStartup:
+.global mainCRTStartup // For Mingw32 builds where the linker looks for this symbol
+mainCRTStartup:
.global start
start:
- .byte 0xe9
- .byte 0xfd
- .byte 0x01
+ jmp RealEntryPoint
+// .byte 0xe9
+// .byte 0xfd
+// .byte 0x01
// Now starts the extra boot code that we will store
// in the first 512 bytes of freeldr.sys. This code
@@ -67,7 +67,7 @@
push ax // First save AX - the start cluster of freeldr.sys
-
+#if 0
// Display "Loading FreeLoader..." message
mov esi, offset msgLoading // Loading message
call [bp-PutCharsOffset] // Display it
@@ -117,15 +117,17 @@
pop es
jmp LoadFile // Load the next cluster (if any)
-
+#endif
LoadFile_Done:
mov dl, [bp+BootDrive] // Load the boot drive into DL
mov dh, BootPartition // Load the boot partition into DH
- push word ptr 0x0000
- push word ptr 0x8000 // We will do a far return to 0000:8000h
-
-// retf // Transfer control to ROSLDR
- .byte 0xcb // == retf
+
+ push 0 // push segment (0x0000)
+ mov bx, [0x8000 + 0xA8] // load the RVA of the EntryPoint into eax
+ add bx, 0x8000 // RVA -> VA and skip 3 bytes (jump to fathelper code)
+ push bx // push offset
+// retf // Transfer control to FreeLoader
+ .byte 0xcb // == retf
// Reads the entire FAT into memory at 7000:0000
@@ -224,7 +226,8 @@
ret
-
+.text
+.code64
msgLoading:
.ascii "Loading FreeLoader..."
.byte 0x0d,0x0a,0
Modified: branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/i386pnp.S
URL: http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/i386pnp.S?rev=48318&r1=48317&r2=48318&view=diff
==============================================================================
--- branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/i386pnp.S [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/i386pnp.S [iso-8859-1] Tue Jul 27 21:49:19 2010
@@ -17,13 +17,11 @@
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
- .text
- .code16
-
#define ASM
-
#include <arch.h>
+.code64
+.text
/*
* U32 PnpBiosSupported(VOID);
@@ -144,7 +142,7 @@
movzx ecx, ax
mov _pnp_result, ecx
- call x86_16_SwitchToLong
+ call [x86_16_SwitchToLong_ptr]
.code64
mov esi, [rbp + 0x08]
@@ -236,7 +234,7 @@
movzx ecx, ax
mov _pnp_result, ecx
- call x86_16_SwitchToLong
+ call [x86_16_SwitchToLong_ptr]
.code64
/* update node number */
@@ -255,4 +253,7 @@
ret
+x86_16_SwitchToLong_ptr:
+ .quad x86_16_SwitchToLong
+
/* EOF */
Modified: branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/int386.S
URL: http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/int386.S?rev=48318&r1=48317&r2=48318&view=diff
==============================================================================
--- branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/int386.S [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/int386.S [iso-8859-1] Tue Jul 27 21:49:19 2010
@@ -17,13 +17,13 @@
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
- .intel_syntax noprefix
- .text
- .code16
+.intel_syntax noprefix
#define ASM
#include <arch.h>
+.code64
+.text
Int386_REGS:
@@ -59,6 +59,10 @@
.quad 0
Int386_regsout:
.quad 0
+
+
+.code16
+.section .text16, "x"
/*
* int Int386(int ivec, REGS* in, REGS* out);
Modified: branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/mb.S
URL: http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/mb.S?rev=48318&r1=48317&r2=48318&view=diff
==============================================================================
--- branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/mb.S [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/mb.S [iso-8859-1] Tue Jul 27 21:49:19 2010
@@ -49,7 +49,8 @@
.byte 0
.endr
-.bss
+.text
+.align 4096
PageDirectoryStart:
pml4_startup:
.fill 4096, 1, 0
Modified: branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr.rbuild
URL: http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr.rbuild?rev=48318&r1=48317&r2=48318&view=diff
==============================================================================
--- branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr.rbuild [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr.rbuild [iso-8859-1] Tue Jul 27 21:49:19 2010
@@ -17,7 +17,7 @@
</if>
<ifnot property="ARCH" value="powerpc">
- <module name="freeldr" type="bootloader" baseaddress="$(BASEADDRESS_FREELDR)">
+ <module name="freeldr" type="bootloader" baseaddress="$(BASEADDRESS_FREELDR)" entrypoint="mainCRTStartup">
<linkerscript>freeldr_$(ARCH).lnk</linkerscript>
<bootstrap installbase="loader" />
<library>freeldr_startup</library>
Modified: branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr_amd64.lnk
URL: http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr_amd64.lnk?rev=48318&r1=48317&r2=48318&view=diff
==============================================================================
--- branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr_amd64.lnk [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/freeldr_amd64.lnk [iso-8859-1] Tue Jul 27 21:49:19 2010
@@ -2,7 +2,13 @@
ENTRY(_mainCRTStartup)
SECTIONS
{
- .text __image_base__ + __section_alignment__ :
+ .text16 __image_base__ + __section_alignment__ :
+ {
+ __text16_start__ = . ;
+ *(.text16)
+ __text16_end__ = . ;
+ }
+ .text BLOCK(__section_alignment__) :
{
__text_start__ = .;
*(.init)
@@ -19,12 +25,6 @@
*(.gcc_exc)
__text_end__ = .;
*(.gcc_except_table)
- }
- init BLOCK(__section_alignment__) :
- {
- __init_start__ = . ;
- *(init)
- __init_end__ = . ;
}
.data BLOCK(__section_alignment__) :
{
@@ -44,14 +44,6 @@
*(SORT(.rdata$*))
*(.eh_frame)
}
- .stab BLOCK(__section_alignment__) (NOLOAD) :
- {
- [ .stab ]
- }
- .stabstr BLOCK(__section_alignment__) (NOLOAD) :
- {
- [ .stabstr ]
- }
}
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