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From d7dc2861840e88a4592817a398a054a886c3f3ee Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Tue, 27 Jun 2017 18:10:54 -0700
Subject: [PATCH] Add ssp_nonshared to link commandline for musl targets
when -fstack-protector options are enabled we need to
link with ssp_shared on musl since it does not provide
the __stack_chk_fail_local() so essentially it provides
libssp but not libssp_nonshared something like
TARGET_LIBC_PROVIDES_SSP_BUT_NOT_SSP_NONSHARED
where-as for glibc the needed symbols
are already present in libc_nonshared library therefore
we do not need any library helper on glibc based systems
but musl needs the libssp_noshared from gcc
Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
gcc/config/linux.h | 7 +++++++
gcc/config/rs6000/linux.h | 10 ++++++++++
gcc/config/rs6000/linux64.h | 10 ++++++++++
3 files changed, 27 insertions(+)
diff --git a/gcc/config/linux.h b/gcc/config/linux.h
index 58143dff731..d2409ccac26 100644
--- a/gcc/config/linux.h
+++ b/gcc/config/linux.h
@@ -208,6 +208,13 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
{ GCC_INCLUDE_DIRVAR, "GCC", 0, 1, 0, 0 }, \
{ 0, 0, 0, 0, 0, 0 } \
}
+#ifdef TARGET_LIBC_PROVIDES_SSP
+#undef LINK_SSP_SPEC
+#define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
+ "|fstack-protector-strong|fstack-protector-explicit" \
+ ":-lssp_nonshared}"
+#endif
+
#endif
#if (DEFAULT_LIBC == LIBC_UCLIBC) && defined (SINGLE_LIBC) /* uClinux */
diff --git a/gcc/config/rs6000/linux.h b/gcc/config/rs6000/linux.h
index 8c9039ac1e5..259cd485973 100644
--- a/gcc/config/rs6000/linux.h
+++ b/gcc/config/rs6000/linux.h
@@ -99,6 +99,16 @@
" -m elf32ppclinux")
#endif
+/* link libssp_nonshared.a with musl */
+#if DEFAULT_LIBC == LIBC_MUSL
+#ifdef TARGET_LIBC_PROVIDES_SSP
+#undef LINK_SSP_SPEC
+#define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
+ "|fstack-protector-strong|fstack-protector-explicit" \
+ ":-lssp_nonshared}"
+#endif
+#endif
+
#undef LINK_OS_LINUX_SPEC
#define LINK_OS_LINUX_SPEC LINK_OS_LINUX_EMUL " %{!shared: %{!static: \
%{!static-pie: \
diff --git a/gcc/config/rs6000/linux64.h b/gcc/config/rs6000/linux64.h
index 364c1a5b155..e33d9ae98e0 100644
--- a/gcc/config/rs6000/linux64.h
+++ b/gcc/config/rs6000/linux64.h
@@ -372,6 +372,16 @@ extern int dot_symbols;
" -m elf64ppc")
#endif
+/* link libssp_nonshared.a with musl */
+#if DEFAULT_LIBC == LIBC_MUSL
+#ifdef TARGET_LIBC_PROVIDES_SSP
+#undef LINK_SSP_SPEC
+#define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
+ "|fstack-protector-strong|fstack-protector-explicit" \
+ ":-lssp_nonshared}"
+#endif
+#endif
+
#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " %{!shared: %{!static: \
%{!static-pie: \
%{rdynamic:-export-dynamic} \
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