patches/gcc/0008-Disable-ssp-on-nostdlib-nodefaultlibs-and-ffreestand.patch

   1 From cfa0c7a3154415fe0e0ab6bd373a8f2164024ff5 Mon Sep 17 00:00:00 2001
   2 From: Ariadne Conill <ariadne@dereferenced.org>
   3 Date: Fri, 21 Aug 2020 06:49:40 +0000
   4 Subject: [PATCH] Disable ssp on -nostdlib, -nodefaultlibs and -ffreestanding
   5  Change the buffer size.
   6
   7 ---
   8  gcc/gcc.c      | 8 +++++++-
   9  gcc/params.opt | 2 +-
  10  2 files changed, 8 insertions(+), 2 deletions(-)
  11
  12 diff --git a/gcc/gcc.c b/gcc/gcc.c
  13 index 7aec9d3a016..daeb4d0c8ea 100644
  14 --- a/gcc/gcc.c
  15 +++ b/gcc/gcc.c
  16 @@ -886,6 +886,12 @@ proper position among the other output files.  */
  17  #define LINK_GCC_C_SEQUENCE_SPEC "%G %{!nolibc:%L %G}"
  18  #endif
  19
  20 +#ifdef ENABLE_DEFAULT_SSP
  21 +#define NO_SSP_SPEC "%{nostdlib|nodefaultlibs|ffreestanding:-fno-stack-protector} "
  22 +#else
  23 +#define NO_SSP_SPEC ""
  24 +#endif
  25 +
  26  #ifndef LINK_SSP_SPEC
  27  #ifdef TARGET_LIBC_PROVIDES_SSP
  28  #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
  29 @@ -1170,7 +1176,7 @@ static const char *cc1_options =
  30   %{-version:--version}\
  31   %{-help=*:--help=%*}\
  32   %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}}\
  33 - %{fsyntax-only:-o %j} %{-param*}\
  34 + %{fsyntax-only:-o %j} %{-param*} " NO_SSP_SPEC "\
  35   %{coverage:-fprofile-arcs -ftest-coverage}\
  36   %{fprofile-arcs|fprofile-generate*|coverage:\
  37     %{!fprofile-update=single:\
  38 diff --git a/gcc/params.opt b/gcc/params.opt
  39 index 4aec480798b..eaecfab37ad 100644
  40 --- a/gcc/params.opt
  41 +++ b/gcc/params.opt
  42 @@ -853,7 +853,7 @@ Common Joined UInteger Var(param_ssa_name_def_chain_limit) Init(512) Param Optim
  43  The maximum number of SSA_NAME assignments to follow in determining a value.
  44
  45  -param=ssp-buffer-size=
  46 -Common Joined UInteger Var(param_ssp_buffer_size) Init(8) IntegerRange(1, 65536) Param Optimization
  47 +Common Joined UInteger Var(param_ssp_buffer_size) Init(4) IntegerRange(1, 65536) Param Optimization
  48  The lower bound for a buffer to be considered for stack smashing protection.
  49
  50  -param=stack-clash-protection-guard-size=
  51 --
  52 2.29.2
  53