6d6a623e7d
The Semihosting v2 protocol requires us to output the Armv8-a HLT instruction
when in mixed mode (SEMIHOST_V2_MIXED_MODE), however it also requires this to
be done for Armv7-a and earlier architectures.
The HLT instruction is defined in the undefined encoding space for older
architectures but simulators such as QEMU already trap on it [1] for all
architectures and is a requirement for semihosting v2 [2].
Unfortunately the GAS restricts the use of HLT to Armv8-a which requires us to
use the instruction encodings we want directly in crt0.
This patch does this, I have not updated newlib/libc/* as that is quite out of
date already. A proper sync is needed in order to get things back in sync.
A different patch for this would be best.
[1]
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| .. | ||
| cpu-init | ||
| Makefile.in | ||
| _exit.c | ||
| _kill.c | ||
| aclocal.m4 | ||
| arm.h | ||
| coff-iq80310.specs | ||
| coff-pid.specs | ||
| coff-rdimon-v2m.specs | ||
| coff-rdimon.specs | ||
| coff-rdpmon.specs | ||
| coff-redboot.ld | ||
| coff-redboot.specs | ||
| configure | ||
| configure.in | ||
| crt0.S | ||
| elf-aprofile-validation-v2m.specs | ||
| elf-aprofile-validation.specs | ||
| elf-aprofile-ve-v2m.specs | ||
| elf-aprofile-ve.specs | ||
| elf-iq80310.specs | ||
| elf-linux.specs | ||
| elf-nano.specs | ||
| elf-pid.specs | ||
| elf-rdimon-v2m.specs | ||
| elf-rdimon.specs | ||
| elf-rdpmon.specs | ||
| elf-redboot.ld | ||
| elf-redboot.specs | ||
| ftruncate.c | ||
| libcfunc.c | ||
| linux-crt0.c | ||
| linux-syscall.h | ||
| linux-syscalls0.S | ||
| linux-syscalls1.c | ||
| redboot-crt0.S | ||
| redboot-syscalls.c | ||
| swi.h | ||
| syscall.h | ||
| syscalls.c | ||
| trap.S | ||
| truncate.c | ||