diff --git a/hello_world/head.S b/hello_world/head.S
index 6357606..15f3494 100644
--- a/hello_world/head.S
+++ b/hello_world/head.S
@@ -60,11 +60,25 @@ _start:
 
 .global boot_entry
 boot_entry:
+	LOAD_IMM64(%r10,__bss_start)
+	LOAD_IMM64(%r11,__bss_end)
+	subf	%r11,%r10,%r11
+	addi	%r11,%r11,63
+	srdi.	%r11,%r11,6
+	beq	2f
+	mtctr	%r11
+1:	dcbz	0,%r10
+	addi	%r10,%r10,64
+	bdnz	1b
+
 	/* setup stack */
-	LOAD_IMM64(%r1, STACK_TOP - 0x100)
+2:	LOAD_IMM64(%r1,__stack_top)
+	li	%r0,0
+	stdu	%r0,-32(%r1)
 	LOAD_IMM64(%r12, main)
-	mtctr	%r12,
+	mtctr	%r12
 	bctrl
+	attn // terminate on exit
 	b .
 
 #define EXCEPTION(nr)		\
diff --git a/hello_world/hello_world.bin b/hello_world/hello_world.bin
index e4b14ca..a4eb88c 100755
Binary files a/hello_world/hello_world.bin and b/hello_world/hello_world.bin differ
diff --git a/hello_world/hello_world.elf b/hello_world/hello_world.elf
index 5eeedc4..3dc0cc1 100755
Binary files a/hello_world/hello_world.elf and b/hello_world/hello_world.elf differ
diff --git a/hello_world/hello_world.hex b/hello_world/hello_world.hex
index 763797e..c0161ad 100644
--- a/hello_world/hello_world.hex
+++ b/hello_world/hello_world.hex
@@ -35,24 +35,24 @@ a64b5a7d14004a39
 a602487d05009f42
 a64b5a7d14004a39
 2402004ca64b7b7d
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 0000000000000000
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@@ -510,150 +510,150 @@ a64b5a7d14004a39
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 000000004bffffd0
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diff --git a/hello_world/powerpc.lds b/hello_world/powerpc.lds
index 96bc6b9..1e218c7 100644
--- a/hello_world/powerpc.lds
+++ b/hello_world/powerpc.lds
@@ -1,13 +1,27 @@
 SECTIONS
 {
-	_start = .;
 	. = 0;
+	_start = .;
 	.head : {
 		KEEP(*(.head))
- 	}
+	}
 	. = 0x1000;
-	.text : { *(.text) }
+	.text : { *(.text) *(.text.*) *(.rodata) *(.rodata.*) }
 	. = 0x1800;
-	.data : { *(.data) }
-	.bss : { *(.bss) }
+	.data : { *(.data) *(.data.*) *(.got) *(.toc) }
+	. = ALIGN(0x80);
+	__bss_start = .;
+	.bss : {
+		*(.dynsbss)
+		*(.sbss)
+		*(.scommon)
+		*(.dynbss)
+		*(.bss)
+		*(.common)
+		*(.bss.*)
+	}
+	. = ALIGN(0x80);
+	__bss_end = .;
+	. = . + 0x2000;
+	__stack_top = .;
 }