linux-kernel - [PATCH 0/2] xtensa: don't link with libgcc

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Date:   Wed,  9 Mar 2022 14:34:16 -0800
From:   Max Filippov <jcmvbkbc@...il.com>
To:     linux-xtensa@...ux-xtensa.org
Cc:     Chris Zankel <chris@...kel.net>, linux-kernel@...r.kernel.org,
        Max Filippov <jcmvbkbc@...il.com>
Subject: [PATCH 0/2] xtensa: don't link with libgcc

Hello,

this series removes xtensa kernel dependency on the libgcc by providing
assembly sources for optimized compiler support functions and using
generic implementations for the rest.

Max Filippov (2):
  xtensa: add helpers for division, remainder and shifts
  xtensa: don't link with libgcc

 arch/xtensa/Kconfig                |   3 +
 arch/xtensa/Makefile               |   6 +-
 arch/xtensa/include/asm/asmmacro.h |  34 ++++++++
 arch/xtensa/kernel/xtensa_ksyms.c  |  14 ---
 arch/xtensa/lib/Makefile           |   2 +
 arch/xtensa/lib/ashldi3.S          |  28 ++++++
 arch/xtensa/lib/ashrdi3.S          |  28 ++++++
 arch/xtensa/lib/divsi3.S           |  74 ++++++++++++++++
 arch/xtensa/lib/lshrdi3.S          |  28 ++++++
 arch/xtensa/lib/modsi3.S           |  87 +++++++++++++++++++
 arch/xtensa/lib/mulsi3.S           | 133 +++++++++++++++++++++++++++++
 arch/xtensa/lib/udivsi3.S          |  68 +++++++++++++++
 arch/xtensa/lib/umodsi3.S          |  57 +++++++++++++
 13 files changed, 543 insertions(+), 19 deletions(-)
 create mode 100644 arch/xtensa/lib/ashldi3.S
 create mode 100644 arch/xtensa/lib/ashrdi3.S
 create mode 100644 arch/xtensa/lib/divsi3.S
 create mode 100644 arch/xtensa/lib/lshrdi3.S
 create mode 100644 arch/xtensa/lib/modsi3.S
 create mode 100644 arch/xtensa/lib/mulsi3.S
 create mode 100644 arch/xtensa/lib/udivsi3.S
 create mode 100644 arch/xtensa/lib/umodsi3.S

-- 
2.30.2