[PATCH][Newlib][libgloss][ARM] - Semihosting v2 ARM implementation (4 / 5)

[Tamar Christina]

Hi All,

resubmitting these as git-am patches.

Thanks,
Tamar
________________________________________
From: newlib-owner@sourceware.org <newlib-owner@sourceware.org> on behalf of Tamar Christina <Tamar.Christina@arm.com>
Sent: Monday, July 3, 2017 5:54:58 PM
To: newlib@sourceware.org
Cc: nd; nickc@redhat.com; Richard Earnshaw
Subject: [PATCH][Newlib][libgloss][ARM] - Semihosting v2 ARM implementation (4 / 5)

Hi All,


This patch adds support for Semihosting v2 support for ARM
in libgloss.

Semihosting v2 changes are documented here:
https://developer.arm.com/docs/100863/latest/

The biggest change is the addition of an extensions mechanism
to add more extensions in the future.

Regression tested on arm-none-eabi and no regressions.

OK for master?

PS. I don't have commit rights, so if OK can someone apply for me?

Thanks,
Tamar


libgloss/arm/
2017-07-03  Tamar Christina  <tamar.christina@arm.com>

        * _kill.c (_kill): Add exit code reporting.
        * swi.h (AngelSWI, AngelSWI_ARM): Add support for HLT.
        (AngelSWI_Reason_IsError): New.
        (AngelSWI_Reason_ReportExceptionExtended): New.
        (AngelSWI_Reason_Elapsed, AngelSWI_Reason_TickFreq): New.
        (NUM_SHFB_MAGIC, SHFB_MAGIC_0, SHFB_MAGIC_2, SHFB_MAGIC_3): New.
        (SH_EXT_EXIT_EXTENDED_BITNUM, SH_EXT_STDOUT_STDERR_BITNUM): New.
        * syscalls.c (get_semihosting_exts, has_ext_exit_extended): New.
        (has_ext_stdout_stderr, initialise_semihosting_exts): New.
        (initialise_monitor_handles): Check for extension.
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