From: taiyun@sunnorth.com.cn
To: ecos-maintainers@ecos.sourceware.org
Subject: eCos with arm eabi compiler
Date: Wed, 12 Sep 2007 03:15:00 -0000 [thread overview]
Message-ID: <OF85D24AD2.200A9EC6-ON48257354.0011E634-48257354.0011E63C@sunnorth.com.cn> (raw)
Dear all:
We are now porting eCos kernel to our platform, EVB named
spaca556g(arm926ej-s). We choose a gcc4.2 eabi
compiler(http://www.codesourcery.com/gnu_toolchains/arm/download.html). The
reason of choosing this compiler is that an EABI compiler can be completely
compatible with ARM RealView libraries. With this arm-eabi compiler,
libraries built from realview can be used.
But there are some problems using this eabi compiler. Because of different
constructing method between arm-elf compiler and eabi compiler,
constructors of global instances can't be invoked automatically when using
the eabi compiler. As a result, we have to make changes to arm.ld and
hal_misc.c files.
NOTE: arm-elf compiler use .ctor section and 2 labels(__CTOR_LIST__,
__CTOR_END__) to invoke constructors, BUT arm-eabi compiler use .init_array
section and lables(__init_array_start, __init_array_end)
arm-eabi compiler's linker script has different sections from arm-elf
compiler's, e.g: .ARM.extab, .ARM.exidx and .ARM.attributes 0, these 3
sections are own in arm-eabi compiler. These sections should be added to
arm.ld, aren't they? If so, there are 2 ways to achieve this goal. One is
making direct changes to arm.ld and adding corresponding sections'
definitions. The other is setting up a new arch-eabi directory in hal/arm,
which is only for arm-eabi compiler. Which is the best?
Taylor Wang
-------------------------------------------------
Special Manager,
Product Development Div I.,
Bejing Sunnorth Electronic Technology Co.,LTD
Email: taiyun@sunnorth.com.cn
Tel: 62981668 Ext.2302
Fax: 62985972
next reply other threads:[~2007-09-12 3:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-12 3:15 taiyun [this message]
2007-09-21 16:04 ` Jonathan Larmour
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