From: Joshua Wise <joshua@rebirth.joshuawise.com>
Date: Wed, 10 Sep 2008 22:24:10 +0000 (-0400)
Subject: Merge ELF loader.
X-Git-Url: http://git.joshuawise.com/netwatch.git/commitdiff_plain/86c89e89a88d25e85956b258005b52e0f2686b89?ds=sidebyside;hp=-c

Merge ELF loader.
---

86c89e89a88d25e85956b258005b52e0f2686b89
diff --combined grubload/Makefile
index c850bb3,041f09c..f0f9742
--- a/grubload/Makefile
+++ b/grubload/Makefile
@@@ -1,4 -1,4 +1,4 @@@
- OBJS=multiboot_c.o multiboot_asm.o console.o minilib.o realmode.o
 -OBJS=multiboot_c.o multiboot_asm.o console.o minilib.o loader.o
++OBJS=multiboot_c.o multiboot_asm.o console.o minilib.o realmode.o loader.o
  CC=gcc
  CFLAGS=-nostdlib -I../include -I. -fno-builtin -nostdinc
  
@@@ -6,9 -6,3 +6,9 @@@ all: multiboo
  
  multiboot: $(OBJS)
  	ld -o multiboot $(OBJS) -Ttext=0x100000
 +
 +realmode.bin: realmode.asm
 +	nasm -o realmode.bin realmode.asm
 +
 +realmode.o: realmode.bin
 +	objcopy -I binary -B i386 -O elf32-i386 realmode.bin realmode.o
diff --combined grubload/multiboot_c.c
index 25522e2,f871687..03e2143
--- a/grubload/multiboot_c.c
+++ b/grubload/multiboot_c.c
@@@ -1,8 -1,5 +1,8 @@@
  #include "console.h"
  
 +extern char _binary_realmode_bin_start[];
 +extern int _binary_realmode_bin_size;
 +
  struct mb_info
  {
  	unsigned long flags;
@@@ -26,8 -23,6 +26,8 @@@ void c_start(unsigned int magic, struc
  	unsigned short *grubptr = 0x7CFE;
  	int i;
  	
 +	void (*realmode)() = 0x4000;
 +	
  	puts("Magic is: ");
  	puthex(magic);
  	puts("\nMultiboot header is: ");
@@@ -38,7 -33,8 +38,8 @@@
  	puts("Grubptr is: ");
  	puthex(*grubptr);
  	puts("\n");
- 	
+ 
+ 
  	for (i = 0; i < wee->mod_cnt; i++)
  	{
  		puts("Module:\n");
@@@ -47,7 -43,15 +48,15 @@@
  		puts("  Name: "); puts(wee->mods[i].mod_string); puts("\n");
  	}
  
+ 	if ((wee->mod_cnt != 1) || (strcmp(wee->mods[0].mod_string, "aseg.elf")))
+ 	{
+ 		puts("Expected 1 module called aseg.elf.\n");
+ 		while(1) asm("hlt");
+ 	}
+ 
+ 	load_elf(wee->mods[0].mod_start, wee->mods[0].mod_end - wee->mods[0].mod_start);
+ 
 -
 -	while (1)
 -		;
 +	puts("Now returning to real mode.\n");	
 +	memcpy(0x4000, _binary_realmode_bin_start, (int)&_binary_realmode_bin_size);
- 	realmode();
++	realmode();	// goodbye!
  }