[Bug gas/17852] New: ARM: selected_cpu may stay unset if compiled with CPU_DEFAULT

2015-01-17 Thread daniel-gl at gmx dot net 
https://sourceware.org/bugzilla/show_bug.cgi?id=17852

Bug ID: 17852
   Summary: ARM: selected_cpu may stay unset if compiled with
CPU_DEFAULT
   Product: binutils
   Version: 2.25
Status: NEW
  Severity: normal
  Priority: P2
 Component: gas
  Assignee: unassigned at sourceware dot org
  Reporter: daniel-gl at gmx dot net

If gas is compiled with CPU_DEFAULT defined, it will set selected_cpu in
md_begin() only if neither -march nor -mcpu has been passed.

This error shows itself f.ex. when assembling arch/arm/lib/changebit.S in
current Linux kernels for an armv7-a platform. This file contains an
".arch_extension mp" line that makes s_arm_arch_extension() set cpu_variant to
selected_cpu|ARM_EXT_MP. As selected_cpu was unset, it refuses to assemble
following instructions with "attempt to use an ARM instruction on a Thumb-only
processor" error messages. Setting cpu_variant from selected_cpu IMHO looks
fishy as well, but I didn't file a bug for that one.

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[Bug gas/17852] ARM: selected_cpu may stay unset if compiled with CPU_DEFAULT

2015-03-07 Thread daniel-gl at gmx dot net 
https://sourceware.org/bugzilla/show_bug.cgi?id=17852



--- Comment #3 from Daniel Glöckner  ---

Doesn't compile as selected_cpu is a structure. But changing the condition 
in

the patch to (!selected_cpu.core && !selected_cpu.coproc) fixes the bug.



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