11241ac656
Fixes: http://autobuild.buildroot.net/results/d6d/d6dc9a640aa1f6650a3e7b9397f2fe2ae3433f4d/ http://autobuild.buildroot.net/results/ab5/ab5a58ea7845f9f378454ee1aa7e872448618ba9/ ebx was recently added to the x86 inline asm MULADDC_STOP clobber list to fix #1550, but this causes the build to fail with GCC < 5 when building in PIC mode with errors like: include/mbedtls/bn_mul.h:46:13: error: PIC register clobbered by ‘ebx’ in ‘asm’ This is because older GCC versions treated the x86 ebx register (which is used for the GOT) as a fixed reserved register when building as PIC. This is fixed by an improved register allocator in GCC 5+. From the release notes: Register allocation improvements: Reuse of the PIC hard register, instead of using a fixed register, was implemented on x86/x86-64 targets. This improves generated PIC code performance as more hard registers can be used. https://www.gnu.org/software/gcc/gcc-5/changes.html As a workaround, add a patch to detect this situation and disable the inline assembly, similar to the MULADDC_CANNOT_USE_R7 logic. Patch submitted upstream: https://github.com/ARMmbed/mbedtls/pull/1986 Signed-off-by: Peter Korsgaard <peter@korsgaard.com> |
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| .. | ||
| 0001-bn_mul.h-fix-x86-PIC-inline-ASM-compilation-with-GCC.patch | ||
| Config.in | ||
| mbedtls.hash | ||
| mbedtls.mk | ||