diff options
Diffstat (limited to 'packages/glibc/2.17/0046-glibc-ppc64le-24.patch')
| -rw-r--r-- | packages/glibc/2.17/0046-glibc-ppc64le-24.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/packages/glibc/2.17/0046-glibc-ppc64le-24.patch b/packages/glibc/2.17/0046-glibc-ppc64le-24.patch new file mode 100644 index 0000000..5870d4f --- /dev/null +++ b/packages/glibc/2.17/0046-glibc-ppc64le-24.patch @@ -0,0 +1,55 @@ +# commit 0b2c2ace3601d5d59cf89130b16840e7f132f7a6 +# Author: Alan Modra <amodra@gmail.com> +# Date: Sat Aug 17 18:36:45 2013 +0930 +# +# PowerPC makecontext +# http://sourceware.org/ml/libc-alpha/2013-08/msg00092.html +# +# Use conditional form of branch and link to avoid destroying the cpu +# link stack used to predict blr return addresses. +# +# * sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S: Use +# conditional form of branch and link when obtaining pc. +# * sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S: Likewise. +# +diff -urN glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S +--- glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S 2014-05-28 12:25:49.000000000 -0500 ++++ glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S 2014-05-28 12:25:51.000000000 -0500 +@@ -47,7 +47,9 @@ + #ifdef PIC + mflr r0 + cfi_register(lr,r0) +- bl 1f ++ /* Use this conditional form of branch and link to avoid destroying ++ the cpu link stack used to predict blr return addresses. */ ++ bcl 20,31,1f + 1: mflr r6 + addi r6,r6,L(exitcode)-1b + mtlr r0 +@@ -136,7 +138,9 @@ + #ifdef PIC + mflr r0 + cfi_register(lr,r0) +- bl 1f ++ /* Use this conditional form of branch and link to avoid destroying ++ the cpu link stack used to predict blr return addresses. */ ++ bcl 20,31,1f + 1: mflr r6 + addi r6,r6,L(novec_exitcode)-1b + mtlr r0 +diff -urN glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S +--- glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S 2014-05-28 12:25:49.000000000 -0500 ++++ glibc-2.17-c758a686/sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S 2014-05-28 12:25:51.000000000 -0500 +@@ -124,8 +124,10 @@ + + /* If the target function returns we need to do some cleanup. We use a + code trick to get the address of our cleanup function into the link +- register. Do not add any code between here and L(exitcode). */ +- bl L(gotexitcodeaddr); ++ register. Do not add any code between here and L(exitcode). ++ Use this conditional form of branch and link to avoid destroying ++ the cpu link stack used to predict blr return addresses. */ ++ bcl 20,31,L(gotexitcodeaddr); + + /* This is the helper code which gets called if a function which + is registered with 'makecontext' returns. In this case we |