boot: arbitrary location of stage 1 and identity map more memoryHEADmaster

1 files changed, 18 insertions, 0 deletions

diff --git a/run.sh b/run.sh
index 6b28de9..346267c 100755
--- a/run.sh
+++ b/run.sh
@@ -1,5 +1,14 @@
 #!/bin/sh -e
 
+print_u32() {
+    printf "\\$(printf %o $(($1&0xFF)))\\$(printf %o $((($1 >> 8)&0xFF)))\\$(printf %o $((($1 >> 16)&0xFF)))\\$(printf %o $((($1 >> 24)&0xFF)))"
+}
+
+
+write_u32() {
+    print_u32 $1 | dd if=/dev/stdin of=$3 conv=notrunc bs=1 seek=$2 status=none
+}
+
 # :Tell hare to use our custom runtime
 # and linker scripts (this feature is so simple and neat :))
 export HAREPATH=.
@@ -19,4 +28,13 @@ objcopy \
 	--binary-architecture=i386:x86-64 \
 	boot boot.bin
 
+size=$(stat -c %s boot.bin)
+sectors=$((size/512 + 1))
+write_u32 1 $((446 + 8)) boot.bin
+write_u32 $sectors $((446 + 12)) boot.bin
+
+[ -f boot.img ] && rm boot.img
+../gptman/gptman convert boot.bin boot.img
+chmod +rw boot.img
+
 bochs