toolchain/gcc/patches/4.8-linaro/930-fix-mips-noexecstack.patch

   1 From da45b3fde60095756f5f6030f6012c23a3d34429 Mon Sep 17 00:00:00 2001
   2 From: Andrew McDonnell <bugs@andrewmcdonnell.net>
   3 Date: Fri, 3 Oct 2014 19:09:00 +0930
   4 Subject: Add .note.GNU-stack section
   5
   6 See http://lists.busybox.net/pipermail/uclibc/2014-October/048671.html
   7 Below copied from https://gcc.gnu.org/ml/gcc-patches/2014-09/msg02430.html
   8
   9 Re: [Patch, MIPS] Add .note.GNU-stack section
  10
  11     From: Steve Ellcey <sellcey at mips dot com>
  12
  13 On Wed, 2014-09-10 at 10:15 -0700, Eric Christopher wrote:
  14 >
  15 >
  16 > On Wed, Sep 10, 2014 at 9:27 AM, <pinskia@gmail.com> wrote:
  17
  18 >         This works except you did not update the assembly files in
  19 >         libgcc or glibc. We (Cavium) have the same patch in our tree
  20 >         for a few released versions.
  21
  22 > Mind just checking yours in then Andrew?
  23
  24 > Thanks!
  25 > -eric
  26
  27 I talked to Andrew about what files he changed in GCC and created and
  28 tested this new patch.  Andrew also mentioned changing some assembly
  29 files in glibc but I don't see any use of '.section .note.GNU-stack' in
  30 any assembly files in glibc (for any platform) so I wasn't planning on
  31 creating a glibc to add them to mips glibc assembly language files.
  32
  33 OK to check in this patch?
  34
  35 Steve Ellcey
  36 sellcey@mips.com
  37
  38
  39
  40 2014-09-26  Steve Ellcey  <sellcey@mips.com>
  41 ---
  42  gcc/config/mips/mips.c          | 3 +++
  43  libgcc/config/mips/crti.S       | 4 ++++
  44  libgcc/config/mips/crtn.S       | 3 +++
  45  libgcc/config/mips/mips16.S     | 4 ++++
  46  libgcc/config/mips/vr4120-div.S | 4 ++++
  47  5 files changed, 18 insertions(+)
  48
  49 diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
  50 index 41c5d6b..33d9793 100644
  51 --- a/gcc/config/mips/mips.c
  52 +++ b/gcc/config/mips/mips.c
  53 @@ -18223,6 +18223,9 @@ mips_expand_vec_minmax (rtx target, rtx op0, rtx op1,
  54  #undef TARGET_VECTORIZE_VEC_PERM_CONST_OK
  55  #define TARGET_VECTORIZE_VEC_PERM_CONST_OK mips_vectorize_vec_perm_const_ok
  56
  57 +#undef TARGET_ASM_FILE_END
  58 +#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
  59 +
  60  struct gcc_target targetm = TARGET_INITIALIZER;
  61  \f
  62  #include "gt-mips.h"
  63 diff --git a/libgcc/config/mips/crti.S b/libgcc/config/mips/crti.S
  64 index c7418db..e5f2762 100644
  65 --- a/libgcc/config/mips/crti.S
  66 +++ b/libgcc/config/mips/crti.S
  67 @@ -21,6 +21,10 @@ a copy of the GCC Runtime Library Exception along with this program;
  68  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  69  <http://www.gnu.org/licenses/>.  */
  70
  71 +
  72 +/* An executable stack is *not* required for these functions.  */
  73 +       .section .note.GNU-stack,"",%progbits
  74 +
  75  /* 4 slots for argument spill area.  1 for cpreturn, 1 for stack.
  76     Return spill offset of 40 and 20.  Aligned to 16 bytes for n32.  */
  77
  78 diff --git a/libgcc/config/mips/crtn.S b/libgcc/config/mips/crtn.S
  79 index 59d1a90..5cc03bf 100644
  80 --- a/libgcc/config/mips/crtn.S
  81 +++ b/libgcc/config/mips/crtn.S
  82 @@ -21,6 +21,9 @@ a copy of the GCC Runtime Library Exception along with this program;
  83  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  84  <http://www.gnu.org/licenses/>.  */
  85
  86 +/* An executable stack is *not* required for these functions.  */
  87 +       .section .note.GNU-stack,"",%progbits
  88 +
  89  /* 4 slots for argument spill area.  1 for cpreturn, 1 for stack.
  90     Return spill offset of 40 and 20.  Aligned to 16 bytes for n32.  */
  91
  92 diff --git a/libgcc/config/mips/mips16.S b/libgcc/config/mips/mips16.S
  93 index ab3a794..4ded5da 100644
  94 --- a/libgcc/config/mips/mips16.S
  95 +++ b/libgcc/config/mips/mips16.S
  96 @@ -27,6 +27,10 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  97     values using the soft-float calling convention, but do the actual
  98     operation using the hard floating point instructions.  */
  99
 100 +/* An executable stack is *not* required for these functions.  */
 101 +       .section .note.GNU-stack,"",%progbits
 102 +       .previous
 103 +
 104  #if defined _MIPS_SIM && (_MIPS_SIM == _ABIO32 || _MIPS_SIM == _ABIO64)
 105
 106  /* This file contains 32-bit assembly code.  */
 107 diff --git a/libgcc/config/mips/vr4120-div.S b/libgcc/config/mips/vr4120-div.S
 108 index 6e9242a..1e260cd 100644
 109 --- a/libgcc/config/mips/vr4120-div.S
 110 +++ b/libgcc/config/mips/vr4120-div.S
 111 @@ -26,6 +26,10 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 112     -mfix-vr4120.  div and ddiv do not give the correct result when one
 113     of the operands is negative.  */
 114
 115 +/* An executable stack is *not* required for these functions.  */
 116 +       .section .note.GNU-stack,"",%progbits
 117 +       .previous
 118 +
 119         .set    nomips16
 120
 121  #define DIV                                                            \
 122 --
 123 1.9.1
 124