On 2016-08-11 23:48, Aurelien Jarno wrote: > On 2016-08-11 23:45, Aurelien Jarno wrote: > > On 2016-08-11 23:12, Aurelien Jarno wrote: > > > Package: binutils > > > Version: 2.27-4 > > > Severity: serious > > > > > > Dear Maintainer, > > > > > > binutils 2.27 added support for non-executable PT_GNU_STACK on mips. For > > > that it sets the ABI version to 5 in the ELF headers so that the glibc > > > can set the stack permission accordingly. Unfortunately the glibc part > > > hasn't been merged yet. This means that binaries produced with > > > -Wl,-z,noexecstack can't be executed later. This is the reason why > > > ffmpeg failed to build from source. > > > > > > I guess we should disabled non-executable PT_GNU_STACK on mips until we > > > get full glibc support. I'll try to work on a patch in the next days, > > > but given my time is currently a bit limited, any help would be > > > appreciated. > > > > The attached patch should do it. It's basically a revert of the upstream > > commit, so that should work. I haven't tested it yet, I will do it > > tomorrow. > > The patch... > > -- > Aurelien Jarno GPG: 4096R/1DDD8C9B > [email protected] http://www.aurel32.net
> # DP: do not set the ABIVERSION to 5 for MIPS objects with non-executable > stack > > This is basically a revert of upstream commit 17733f5be9. The GNU libc > side is not yet ready for that. > > --- a/bfd/elfxx-mips.c > +++ b/bfd/elfxx-mips.c > @@ -16187,9 +16187,6 @@ > if (mips_elf_tdata (abfd)->abiflags.fp_abi == Val_GNU_MIPS_ABI_FP_64 > || mips_elf_tdata (abfd)->abiflags.fp_abi == Val_GNU_MIPS_ABI_FP_64A) > i_ehdrp->e_ident[EI_ABIVERSION] = 3; > - > - if (elf_stack_flags (abfd) && !(elf_stack_flags (abfd) & PF_X)) > - i_ehdrp->e_ident[EI_ABIVERSION] = 5; > } > > int I confirm the above patch fixes the problem. Matthias, could you please do an upload of binutils with it? Thanks in advance. Aurelien -- Aurelien Jarno GPG: 4096R/1DDD8C9B [email protected] http://www.aurel32.net
