diff options
Diffstat (limited to 'target/linux/uml/patches-4.9/000-um-Avoid-longjmp-setjmp-symbol-clashes-with-libpthre.patch')
| -rw-r--r-- | target/linux/uml/patches-4.9/000-um-Avoid-longjmp-setjmp-symbol-clashes-with-libpthre.patch | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/target/linux/uml/patches-4.9/000-um-Avoid-longjmp-setjmp-symbol-clashes-with-libpthre.patch b/target/linux/uml/patches-4.9/000-um-Avoid-longjmp-setjmp-symbol-clashes-with-libpthre.patch new file mode 100644 index 0000000..02149ee --- /dev/null +++ b/target/linux/uml/patches-4.9/000-um-Avoid-longjmp-setjmp-symbol-clashes-with-libpthre.patch @@ -0,0 +1,130 @@ +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 |