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ARMv8 has particular restrictions which coprocessor can be used and as
such these instructions, which were likely used for backwards
compatibility purposes, cannot be used on ARMv8. We solve this by
checking for ARMv8 and then using the corresponding mnemonics which were
placed in comments alongside the instructions causing issues.
Fixes the following errors:
.../setjmp.S:59:6: error: invalid operand for instruction
stc p11, cr8, [r12], #68
^
.../setjmp.S:62:6: error: invalid operand for instruction
mrc p10, 7, r2, cr1, cr0, 0
^
.../__longjmp.S:69:6: error: invalid operand for instruction
ldc p11, cr8, [r12], #68
^
.../__longjmp.S:73:6: error: invalid operand for instruction
mcr p10, 7, r1, cr1, cr0, 0
^
Signed-off-by: Marcus Haehnel <marcus.haehnel@kernkonzept.com>
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This matches a similar change made to glibc.
No functional changes here.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Many Thumb-2 instructions cannot use sp or pc as operands, and the
assembler now diagnoses these. setjmp had one such instruction, movs;
this patch changes it to mov.
Signed-off-by: Joseph Myers <joseph@codesourcery.com>
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The attached patch adds support for compiling arm uClibc as pure Thumb code.
This is needed because some recent ARM codes do not implement traditional ARM
mode. Specifically:
* Cortex-M1 - An extremely minimal FPGA based core that only implements
Thumb-1 (aka ARMv6-M).
* Cortex-M3 - A Thumb-2 only ARMv7-M core.
Most of uClibc already builds in Thumb mode, all that is left are a handful of
assembly bits.
Tested on arm-uclinuxeabi.
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The patch fixes up the .align directives to '2' (i.e. a multiple
of 4) not '4' (a multiple of 16 - apparently an error since it seems
to be unnecessary, there is no advantage here in cache line alignment).
this is an arm "feature" ... the value given to .align is not in bytes:
.align 4 in arm means .align 2 ^ 4
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http://yann.poupet.free.fr/ep93xx/
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Hide __syscall_error from outside libc.
From Peter Mazinger.
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patch from Vadim Lebedev <vadim@7chips.com>.
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-Erik
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on both x86 and arm...
-Erik
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functions as such, thereby hosing the shared lib loader.
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