toolchain/gcc/patches/8.1.0/930-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 --- a/gcc/config/mips/mips.c
  50 +++ b/gcc/config/mips/mips.c
  51 @@ -22627,6 +22627,9 @@ mips_starting_frame_offset (void)
  52  #undef TARGET_STARTING_FRAME_OFFSET
  53  #define TARGET_STARTING_FRAME_OFFSET mips_starting_frame_offset
  54
  55 +#undef TARGET_ASM_FILE_END
  56 +#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
  57 +
  58  struct gcc_target targetm = TARGET_INITIALIZER;
  59  \f
  60  #include "gt-mips.h"
  61 --- a/libgcc/config/mips/crti.S
  62 +++ b/libgcc/config/mips/crti.S
  63 @@ -21,6 +21,10 @@ a copy of the GCC Runtime Library Except
  64  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  65  <http://www.gnu.org/licenses/>.  */
  66
  67 +
  68 +/* An executable stack is *not* required for these functions.  */
  69 +       .section .note.GNU-stack,"",%progbits
  70 +
  71  /* 4 slots for argument spill area.  1 for cpreturn, 1 for stack.
  72     Return spill offset of 40 and 20.  Aligned to 16 bytes for n32.  */
  73
  74 --- a/libgcc/config/mips/crtn.S
  75 +++ b/libgcc/config/mips/crtn.S
  76 @@ -21,6 +21,9 @@ a copy of the GCC Runtime Library Except
  77  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  78  <http://www.gnu.org/licenses/>.  */
  79
  80 +/* An executable stack is *not* required for these functions.  */
  81 +       .section .note.GNU-stack,"",%progbits
  82 +
  83  /* 4 slots for argument spill area.  1 for cpreturn, 1 for stack.
  84     Return spill offset of 40 and 20.  Aligned to 16 bytes for n32.  */
  85
  86 --- a/libgcc/config/mips/mips16.S
  87 +++ b/libgcc/config/mips/mips16.S
  88 @@ -48,6 +48,10 @@ see the files COPYING3 and COPYING.RUNTI
  89     values using the soft-float calling convention, but do the actual
  90     operation using the hard floating point instructions.  */
  91
  92 +/* An executable stack is *not* required for these functions.  */
  93 +       .section .note.GNU-stack,"",%progbits
  94 +       .previous
  95 +
  96  #if defined _MIPS_SIM && (_MIPS_SIM == _ABIO32 || _MIPS_SIM == _ABIO64)
  97
  98  /* This file contains 32-bit assembly code.  */
  99 --- a/libgcc/config/mips/vr4120-div.S
 100 +++ b/libgcc/config/mips/vr4120-div.S
 101 @@ -26,6 +26,10 @@ see the files COPYING3 and COPYING.RUNTI
 102     -mfix-vr4120.  div and ddiv do not give the correct result when one
 103     of the operands is negative.  */
 104
 105 +/* An executable stack is *not* required for these functions.  */
 106 +       .section .note.GNU-stack,"",%progbits
 107 +       .previous
 108 +
 109         .set    nomips16
 110
 111  #define DIV                                                            \