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Re: [PATCH] cris: Wire up missing syscalls

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  Re: [PATCH] cris: Wire up missing syscalls Hans-Peter Nilsson <hans-peter.nilsson@axis.com> - 2015-06-03 17:30 +0200
    Re: [PATCH] cris: Wire up missing syscalls Chen Gang <xili_gchen_5257@hotmail.com> - 2015-06-06 02:20 +0200
    Re: [PATCH] cris: Wire up missing syscalls Chen Gang <xili_gchen_5257@hotmail.com> - 2015-06-06 02:20 +0200

#1157773 — Re: [PATCH] cris: Wire up missing syscalls

> From: Jesper Nilsson <jespern@axis.com>
> Date: Wed, 3 Jun 2015 17:04:26 +0200

> On Wed, Jun 03, 2015 at 01:36:47PM +0200, Chen Gang wrote:
> >  - For v10, need we also use "sys*" instead of "_sys*"?
> 
> No, the trick here is that v10 and v32 uses different standards
> with regards to prefixing underscore. I'm hoping to fix that someday.

Not exactly, but almost; please let me fill in JFTR:

Most people probably guessed correctly that this is related to
building the CRIS v10 kernel with the *-elf toolchain (which has
the convention that symbols are prefixed with underscores for
cris-*-elf and crisv32-*-elf) while (IIUC) the CRIS v32 kernel
is built with the *-linux-gnu toolchain (which does not have any
symbol prefix for cris-*-linux-gnu crisv32-*-linux-gnu).

One Might Imagine that there'd be build machinery in place in
the kernel such that such a symbol prefix issue could be hidden,
like a header to include and using e.g. S(symbol) in all
assembly files.  (Actually some time ago I thought there already
was, but Jesper corrected me.)

brgds, H-P
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#1159792

On 6/3/15 23:23, Hans-Peter Nilsson wrote:
> 
> Most people probably guessed correctly that this is related to
> building the CRIS v10 kernel with the *-elf toolchain (which has
> the convention that symbols are prefixed with underscores for
> cris-*-elf and crisv32-*-elf) while (IIUC) the CRIS v32 kernel
> is built with the *-linux-gnu toolchain (which does not have any
> symbol prefix for cris-*-linux-gnu crisv32-*-linux-gnu).
> 

What you said above is helpful to me. Originally I often use *-elf for
cross compiling linux kernel, it is incorrect for some archs.

After use *-linux, the upstream frv toolchain can work well (for me, it
is the last arch which has missing syscalls). :-)


Thanks.
-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed
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#1159793

On 6/3/15 23:23, Hans-Peter Nilsson wrote:
> 
> Most people probably guessed correctly that this is related to
> building the CRIS v10 kernel with the *-elf toolchain (which has
> the convention that symbols are prefixed with underscores for
> cris-*-elf and crisv32-*-elf) while (IIUC) the CRIS v32 kernel
> is built with the *-linux-gnu toolchain (which does not have any
> symbol prefix for cris-*-linux-gnu crisv32-*-linux-gnu).
> 

What you said above is helpful to me. Originally I often use *-elf for
cross compiling linux kernel, it is incorrect for some archs (e.g. frv,
m32r, and our cris).

After use *-linux, the upstream frv toolchain can work well (for me, it
is the last arch which has missing syscalls). :-)


Thanks.
-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
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