mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 18:19:02 +00:00
131 lines
3.7 KiB
Diff
131 lines
3.7 KiB
Diff
From f44f1e7da7c8e3f4575d5d61c4df978496903fcc Mon Sep 17 00:00:00 2001
|
|
From: Florian Fainelli <f.fainelli@gmail.com>
|
|
Date: Tue, 23 May 2017 17:32:31 -0700
|
|
Subject: [PATCH] um: Avoid longjmp/setjmp symbol clashes with libpthread.a
|
|
|
|
[ Upstream commit f44f1e7da7c8e3f4575d5d61c4df978496903fcc ]
|
|
|
|
Building a statically linked UML kernel on a Centos 6.9 host resulted in
|
|
the following linking failure (GCC 4.4, glibc-2.12):
|
|
|
|
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../lib64/libpthread.a(libpthread.o):
|
|
In function `siglongjmp':
|
|
(.text+0x8490): multiple definition of `longjmp'
|
|
arch/x86/um/built-in.o:/local/users/fainelli/openwrt/trunk/build_dir/target-x86_64_musl/linux-uml/linux-4.4.69/arch/x86/um/setjmp_64.S:44:
|
|
first defined here
|
|
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../lib64/libpthread.a(libpthread.o):
|
|
In function `sem_open':
|
|
(.text+0x77cd): warning: the use of `mktemp' is dangerous, better use
|
|
`mkstemp'
|
|
collect2: ld returned 1 exit status
|
|
make[4]: *** [vmlinux] Error 1
|
|
|
|
Adopt a solution similar to the one done for vmap where we define
|
|
longjmp/setjmp to be kernel_longjmp/setjmp. In the process, make sure we
|
|
do rename the functions in arch/x86/um/setjmp_*.S accordingly.
|
|
|
|
Fixes: a7df4716d195 ("um: link with -lpthread")
|
|
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
|
|
Signed-off-by: Richard Weinberger <richard@nod.at>
|
|
---
|
|
arch/um/Makefile | 4 ++++
|
|
arch/x86/um/setjmp_32.S | 16 ++++++++--------
|
|
arch/x86/um/setjmp_64.S | 16 ++++++++--------
|
|
3 files changed, 20 insertions(+), 16 deletions(-)
|
|
|
|
--- a/arch/um/Makefile
|
|
+++ b/arch/um/Makefile
|
|
@@ -59,10 +59,14 @@ KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_D
|
|
# Same things for in6addr_loopback and mktime - found in libc. For these two we
|
|
# only get link-time error, luckily.
|
|
#
|
|
+# -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a
|
|
+# embedded copy of longjmp, same thing for setjmp.
|
|
+#
|
|
# These apply to USER_CFLAGS to.
|
|
|
|
KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
|
|
$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
|
|
+ -Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \
|
|
-Din6addr_loopback=kernel_in6addr_loopback \
|
|
-Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
|
|
|
|
--- a/arch/x86/um/setjmp_32.S
|
|
+++ b/arch/x86/um/setjmp_32.S
|
|
@@ -16,9 +16,9 @@
|
|
|
|
.text
|
|
.align 4
|
|
- .globl setjmp
|
|
- .type setjmp, @function
|
|
-setjmp:
|
|
+ .globl kernel_setjmp
|
|
+ .type kernel_setjmp, @function
|
|
+kernel_setjmp:
|
|
#ifdef _REGPARM
|
|
movl %eax,%edx
|
|
#else
|
|
@@ -35,13 +35,13 @@ setjmp:
|
|
movl %ecx,20(%edx) # Return address
|
|
ret
|
|
|
|
- .size setjmp,.-setjmp
|
|
+ .size kernel_setjmp,.-kernel_setjmp
|
|
|
|
.text
|
|
.align 4
|
|
- .globl longjmp
|
|
- .type longjmp, @function
|
|
-longjmp:
|
|
+ .globl kernel_longjmp
|
|
+ .type kernel_longjmp, @function
|
|
+kernel_longjmp:
|
|
#ifdef _REGPARM
|
|
xchgl %eax,%edx
|
|
#else
|
|
@@ -55,4 +55,4 @@ longjmp:
|
|
movl 16(%edx),%edi
|
|
jmp *20(%edx)
|
|
|
|
- .size longjmp,.-longjmp
|
|
+ .size kernel_longjmp,.-kernel_longjmp
|
|
--- a/arch/x86/um/setjmp_64.S
|
|
+++ b/arch/x86/um/setjmp_64.S
|
|
@@ -18,9 +18,9 @@
|
|
|
|
.text
|
|
.align 4
|
|
- .globl setjmp
|
|
- .type setjmp, @function
|
|
-setjmp:
|
|
+ .globl kernel_setjmp
|
|
+ .type kernel_setjmp, @function
|
|
+kernel_setjmp:
|
|
pop %rsi # Return address, and adjust the stack
|
|
xorl %eax,%eax # Return value
|
|
movq %rbx,(%rdi)
|
|
@@ -34,13 +34,13 @@ setjmp:
|
|
movq %rsi,56(%rdi) # Return address
|
|
ret
|
|
|
|
- .size setjmp,.-setjmp
|
|
+ .size kernel_setjmp,.-kernel_setjmp
|
|
|
|
.text
|
|
.align 4
|
|
- .globl longjmp
|
|
- .type longjmp, @function
|
|
-longjmp:
|
|
+ .globl kernel_longjmp
|
|
+ .type kernel_longjmp, @function
|
|
+kernel_longjmp:
|
|
movl %esi,%eax # Return value (int)
|
|
movq (%rdi),%rbx
|
|
movq 8(%rdi),%rsp
|
|
@@ -51,4 +51,4 @@ longjmp:
|
|
movq 48(%rdi),%r15
|
|
jmp *56(%rdi)
|
|
|
|
- .size longjmp,.-longjmp
|
|
+ .size kernel_longjmp,.-kernel_longjmp
|