patches/gcc/4.3.3/110-trampolinewarn.patch
author Michael Hope <michael.hope@linaro.org>
Wed Oct 19 15:27:32 2011 +1300 (2011-10-19)
changeset 2739 f320e22f2cba
permissions -rw-r--r--
arch: add softfp support

Some architectures support a mixed hard/soft floating point, where
the compiler emits hardware floating point instructions, but passes
the operands in core (aka integer) registers.

For example, ARM supports this mode (to come in the next changeset).

Add support for softfp cross compilers to the GCC and GLIBC
configuration. Needed for Ubuntu and other distros that are softfp.

Signed-off-by: Michael Hope <michael.hope@linaro.org>
[yann.morin.1998@anciens.enib.fr: split the original patch]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
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Original patch from: ../4.3.2/110-trampolinewarn.patch
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-= BEGIN original header =-
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Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/00_all_gcc-trampolinewarn.patch
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	This trivial patch causes gcc to emit a warning whenever
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	it generates a trampoline.  These are otherwise hard to
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	locate.  It is rigged to default ON - to have it default
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	to OFF remove the text 'Init(1)' from the common.opt
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	patch, leaving just 'Common Var(warn_trampolines)'.
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	Kevin F. Quinn <kevquinn@gentoo.org> 17 Jan 2006
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-= END original header =-
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diff -durN gcc-4.3.3.orig/gcc/builtins.c gcc-4.3.3/gcc/builtins.c
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--- gcc-4.3.3.orig/gcc/builtins.c	2008-08-19 18:37:13.000000000 +0200
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+++ gcc-4.3.3/gcc/builtins.c	2009-01-27 22:19:12.000000000 +0100
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@@ -5662,6 +5662,9 @@
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   trampolines_created = 1;
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   INITIALIZE_TRAMPOLINE (r_tramp, r_func, r_chain);
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+  if (warn_trampolines)
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+    warning (OPT_Wtrampolines, "generating trampoline in object (requires executable stack)");
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+
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   return const0_rtx;
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 }
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diff -durN gcc-4.3.3.orig/gcc/common.opt gcc-4.3.3/gcc/common.opt
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--- gcc-4.3.3.orig/gcc/common.opt	2008-01-22 15:11:44.000000000 +0100
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+++ gcc-4.3.3/gcc/common.opt	2009-01-27 22:19:12.000000000 +0100
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@@ -182,6 +182,10 @@
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 Common Var(warn_system_headers) Warning
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 Do not suppress warnings from system headers
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+Wtrampolines
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+Common Var(warn_trampolines) Init(1)
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+Warn whenever a trampoline is generated
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+
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 Wuninitialized
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 Common Var(warn_uninitialized) Warning
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 Warn about uninitialized automatic variables