diff options
| author | Thomas Weißschuh <linux@weissschuh.net> | 2023-03-25 16:45:12 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2023-03-27 16:26:10 -0700 |
| commit | 7188d4637e95b9becde246fa08bb419a3b080f9b (patch) | |
| tree | 39420362b9bd91acb3bdc7d3dd5b90d2b1572a60 /tools/include/nolibc/Makefile | |
| parent | c4560bd8066311c7cee5d7396e7fbd7cb3b7eabc (diff) | |
tools/nolibc: add support for stack protector
This is useful when using nolibc for security-critical tools.
Using nolibc has the advantage that the code is easily auditable and
sandboxable with seccomp as no unexpected syscalls are used.
Using compiler-assistent stack protection provides another security
mechanism.
For this to work the compiler and libc have to collaborate.
This patch adds the following parts to nolibc that are required by the
compiler:
* __stack_chk_guard: random sentinel value
* __stack_chk_fail: handler for detected stack smashes
In addition an initialization function is added that randomizes the
sentinel value.
Only support for global guards is implemented.
Register guards are useful in multi-threaded context which nolibc does
not provide support for.
Link: https://lwn.net/Articles/584225/
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'tools/include/nolibc/Makefile')
| -rw-r--r-- | tools/include/nolibc/Makefile | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/include/nolibc/Makefile b/tools/include/nolibc/Makefile index ec57d3932506..9839feafd38a 100644 --- a/tools/include/nolibc/Makefile +++ b/tools/include/nolibc/Makefile @@ -25,8 +25,8 @@ endif nolibc_arch := $(patsubst arm64,aarch64,$(ARCH)) arch_file := arch-$(nolibc_arch).h -all_files := ctype.h errno.h nolibc.h signal.h std.h stdint.h stdio.h stdlib.h \ - string.h sys.h time.h types.h unistd.h +all_files := ctype.h errno.h nolibc.h signal.h stackprotector.h std.h stdint.h \ + stdio.h stdlib.h string.h sys.h time.h types.h unistd.h # install all headers needed to support a bare-metal compiler all: headers |