+ /* march=all, will match the m_profile case too, so things like 'mrs r2,cpsr'
+ * will now fail. Workaround by saying it's not a m profile */
+ if (selected_cpu.core == arm_arch_any.core)
+ m_profile = FALSE;
+
/* CPSR's and SPSR's can now be lowercase. This is just a convenience
feature for ease of use and backwards compatibility. */
p = *str;
It doesn't seem to create any regression but I'm not sure how good is this patch. At least, I hope it'll help fixing the bug.
As noticed by debian bug 623964, when building an arm kernel with a snasphot made on 04/19, compiling head.S is failing with :
Error: selected processor does not support requested special purpose register -- `mrs r2,cpsr'
It's valid for current head.
To reproduce, create a head.S containing:
mrs r2, cpsr
msr cpsr_c, r2
And then build with ./gas/as-new -march=all -c head.S -o head.o
I believe it's due to this commit : sourceware. org/git/ ?p=binutils. git;a=commitdif f;h=335cd491563 02284cea0438fd0 68f0a7cc11355a
http://
I've written this workaround:
--- binutils. orig/gas/ config/ tc-arm. c gas/config/ tc-arm. c
+++ binutils/
@@ -5356,6 +5356,11 @@ parse_psr (char **str, bfd_boolean lhs)
bfd_boolean is_apsr = FALSE;
bfd_boolean m_profile = ARM_CPU_HAS_FEATURE (selected_cpu, arm_ext_m);
+ /* march=all, will match the m_profile case too, so things like 'mrs r2,cpsr'
+ * will now fail. Workaround by saying it's not a m profile */
+ if (selected_cpu.core == arm_arch_any.core)
+ m_profile = FALSE;
+
/* CPSR's and SPSR's can now be lowercase. This is just a convenience
feature for ease of use and backwards compatibility. */
p = *str;
It doesn't seem to create any regression but I'm not sure how good is this patch. At least, I hope it'll help fixing the bug.