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kpatch
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fix compiler warnings, add -o flag

This commit is contained in:
Josh Poimboeuf 2013-01-18 10:42:56 -06:00
parent e9e4563a80
commit fc12020ae3
2 changed files with 28 additions and 19 deletions
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9
kmod/base.c
View File

@ -144,7 +144,6 @@ int kpatch_register(struct module *mod, void *kpatch_relas,
{
int ret = 0;
int ret2;
struct kpatch_func *f, *g;
int num_relas;
struct kpatch_rela *relas;
int i;
@ -179,7 +178,7 @@ int kpatch_register(struct module *mod, void *kpatch_relas,
ret = -EINVAL;
goto out;
}
printk("%p <- %lx\n", loc, val);
//printk("%p <- %lx\n", loc, val);
//printk("%lx\n", (unsigned long)__va(__pa((unsigned long)loc)));
//loc = __va(__pa((unsigned long)loc));
set_memory_rw((unsigned long)loc & PAGE_MASK, 1);
@ -290,6 +289,7 @@ out:
}
EXPORT_SYMBOL(kpatch_register);
#if 0
/* Called from stop_machine */
static int kpatch_remove_patch(void *data)
{
@ -321,13 +321,14 @@ static int kpatch_remove_patch(void *data)
out:
return ret;
}
#endif
int kpatch_unregister(struct module *mod)
{
int ret = 0;
#if 0
struct kpatch_func *f;
#if 0
ret = stop_machine(kpatch_remove_patch, funcs, NULL);
if (ret)
goto out;
@ -350,9 +351,9 @@ int kpatch_unregister(struct module *mod)
goto out;
}
}
#endif
out:
#endif
return ret;
}
EXPORT_SYMBOL(kpatch_unregister);

38
kpatch-create
View File

@ -4,6 +4,8 @@ set -o nounset
set -o errexit
set -o pipefail
# TODO: log output to a file instead of /dev/null
CUR_DIR="$PWD"
SCRIPT="`basename $BASH_SOURCE`"
SCRIPT_DIR="`dirname $BASH_SOURCE`"
@ -24,6 +26,13 @@ PROGRESS_FILE="kpatch-in-progress"
PATCHED=
PATCH=
KERNEL_DIR=
OUTPUT_DIR=
usage ()
{
echo "usage: $SCRIPT -p [PATCH] -k [KERNEL DIR] -o [OUTPUT DIR]" >&2
exit 1
}
scriptecho ()
@ -45,12 +54,12 @@ cleanup ()
cleanup_objs
if [ $PATCHED ]; then
cd "$KERNEL_DIR"
patch -p1 -R < "$PATCH"
patch -p1 -R < "$PATCH" > /dev/null
export CROSS_COMPILE="$KPATCHGCC "
$MAKE_CMD > /dev/null
fi
#rm -rf "$TMPDIR"
rm -rf "$TMPDIR"
}
die ()
@ -59,27 +68,24 @@ die ()
exit 1
}
usage ()
{
echo "usage: $SCRIPT -p [patch] -k [KERNEL_DIR]" >&2
exit 1
}
while getopts "p:k:" arg; do
while getopts "p:k:o:" arg; do
case "$arg" in
p) PATCH="$OPTARG" ;;
k) KERNEL_DIR="$OPTARG" ;;
o) OUTPUT_DIR="$OPTARG" ;;
*) usage ;;
esac
done
[ ! "$PATCH" ] || [ ! "$KERNEL_DIR" ] && usage
[ ! "$PATCH" ] || [ ! "$KERNEL_DIR" ] || [ ! "$OUTPUT_DIR" ] && usage
[ ! -f "$PATCH" ] && die "$PATCH doesn't exist"
[ ! -d "$KERNEL_DIR" ] && die "$KERNEL_DIR doesn't exist"
mkdir -p "$OUTPUT_DIR"
PATCH="`readlink -f \"$PATCH\"`"
KERNEL_DIR="`readlink -f \"$KERNEL_DIR\"`"
OUTPUT_DIR="`readlink -f \"$OUTPUT_DIR\"`"
TMPDIR="`mktemp -d`"
trap cleanup exit
@ -92,7 +98,7 @@ $MAKE_CMD > /dev/null
cp vmlinux vmlinux.orig_kpatch
scriptecho "patching kernel"
patch -p1 < "$PATCH"
patch -p1 < "$PATCH" > /dev/null
PATCHED=1
scriptecho "compiling patched kernel"
@ -115,12 +121,14 @@ done
unset CROSS_COMPILE
cp -a "$KMOD_DIR" "$TMPDIR/kmod"
make -C "$KERNEL_DIR" M="$TMPDIR/kmod" kpatch-patch-hook.o
make -C "$KERNEL_DIR" M="$TMPDIR/kmod" kpatch-patch-hook.o > /dev/null
cd $TMPDIR/kmod
find "$KERNEL_DIR" -name "*.kpatch_gen" -exec ld -m elf_x86_64 -r -o kpatch-patch-foo.o kpatch-patch-hook.o kpatch.lds {} +
make -C "$KERNEL_DIR" M="$TMPDIR/kmod" kpatch.ko
make -C "$KERNEL_DIR" M="$TMPDIR/kmod" kpatch-patch.ko
make -C "$KERNEL_DIR" M="$TMPDIR/kmod" kpatch.ko > /dev/null
make -C "$KERNEL_DIR" M="$TMPDIR/kmod" kpatch-patch.ko > /dev/null
scriptecho success
cp kpatch.ko kpatch-patch.ko "$OUTPUT_DIR"
scriptecho Success!