From: "Maciej W. Rozycki" <macro@imgtec.com>
To: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/4] MIPS: Fix ISA I FP sigcontext access violation handling
Date: Mon, 31 Oct 2016 16:25:44 +0000 [thread overview]
Message-ID: <alpine.DEB.2.00.1610310325060.31859@tp.orcam.me.uk> (raw)
Message-ID: <20161031162544.TdztMqkyKF5QGBIxZd8Hb3sJz5HIXOUDG1Kozw-FleM@z> (raw)
In-Reply-To: <alpine.DEB.2.00.1610310319010.31859@tp.orcam.me.uk>
Complement commit 0ae8dceaebe3 ("Merge with 2.3.10.") and use the local
`fault' handler to recover from FP sigcontext access violation faults,
like corresponding code does in r4k_fpu.S. The `bad_stack' handler is
in syscall.c and is not suitable here as we want to propagate the error
condition up through the caller rather than killing the thread outright.
Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
---
I guess it hardly ever triggers and code still builds, so it has aged so
well...
Maciej
linux-mips-isa1-sig-fp-context-fault.patch
Index: linux-sfr-test/arch/mips/kernel/r2300_fpu.S
===================================================================
--- linux-sfr-test.orig/arch/mips/kernel/r2300_fpu.S 2016-10-22 02:36:46.000000000 +0100
+++ linux-sfr-test/arch/mips/kernel/r2300_fpu.S 2016-10-22 02:37:20.891186000 +0100
@@ -21,7 +21,7 @@
#define EX(a,b) \
9: a,##b; \
.section __ex_table,"a"; \
- PTR 9b,bad_stack; \
+ PTR 9b,fault; \
.previous
.set noreorder
next prev parent reply other threads:[~2016-10-31 16:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-31 16:24 [PATCH 0/4] MIPS I/II FP signal context handling fixes Maciej W. Rozycki
2016-10-31 16:24 ` Maciej W. Rozycki
2016-10-31 16:25 ` Maciej W. Rozycki [this message]
2016-10-31 16:25 ` [PATCH 1/4] MIPS: Fix ISA I FP sigcontext access violation handling Maciej W. Rozycki
2016-11-01 9:27 ` Paul Burton
2016-11-01 9:27 ` Paul Burton
2016-10-31 16:26 ` [PATCH 2/4] MIPS: Remove FIR from ISA I FP signal context Maciej W. Rozycki
2016-10-31 16:26 ` Maciej W. Rozycki
2016-10-31 16:27 ` [PATCH 3/4] MIPS: Fix ISA I/II FP signal context offsets Maciej W. Rozycki
2016-10-31 16:27 ` Maciej W. Rozycki
2016-11-01 9:31 ` Paul Burton
2016-11-01 9:31 ` Paul Burton
2016-11-01 11:49 ` Maciej W. Rozycki
2016-11-01 11:49 ` Maciej W. Rozycki
2016-10-31 16:27 ` [PATCH 4/4] MIPS: Correct MIPS I FP sigcontext layout Maciej W. Rozycki
2016-10-31 16:27 ` Maciej W. Rozycki
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