From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 5/5] ARM: Cortex-M3: Add support for exception handling
Date: Thu, 16 Feb 2012 22:20:02 +0000 [thread overview]
Message-ID: <20120216222002.GL27825@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1329423490-15580-5-git-send-email-u.kleine-koenig@pengutronix.de>
On Thu, Feb 16, 2012 at 09:18:10PM +0100, Uwe Kleine-K?nig wrote:
> + .macro v7m_exception_entry
> + cpsid i
> + tst lr, #0x8 @ check the return stack
> + bne 1f @ exception on process stack
> + add r12, sp, #32 @ MSP before exception
> + stmdb sp!, {r4-r12, lr} @ push unsaved registers
> + b 2f
> +1:
> + mrs r12, psp @ get the process stack
> + sub sp, #S_FRAME_SIZE
> + stmia sp, {r4-r12, lr} @ push unsaved registers
> + ldmia r12, {r0-r3, r6, r8-r10} @ load automatically saved registers
> + add r12, sp, #S_R0
> + stmia r12, {r0-r3, r6, r8-r10} @ fill in the rest of struct pt_regs
I guess this means that pt_regs no longer contains r0..pc, cpsr, old_r0
on this Cortex-M ?
If so, that's a problem - tools like gdb, strace, and other user programs
which make use of siginfo stuff all expect ARM to have a certain ptrace
layout. This is major ABI breakage.
next prev parent reply other threads:[~2012-02-16 22:20 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-22 11:12 [RFC PATCH 00/11] Cortex-M3 support Uwe Kleine-König
2012-01-22 11:13 ` [RFC PATCH 01/11] ARM: only show modules in the memory layout for MODULES=y Uwe Kleine-König
2012-01-26 6:16 ` Linus Walleij
2012-01-22 11:13 ` [RFC PATCH 02/11] ARM: add device tree blobs to .gitignore Uwe Kleine-König
2012-01-22 11:13 ` [RFC PATCH 03/11] ARM: protect usage of cr_alignment by #ifdef CONFIG_CPU_CP15 Uwe Kleine-König
2012-01-23 5:43 ` Jean-Christophe PLAGNIOL-VILLARD
2012-01-23 8:14 ` Uwe Kleine-König
2012-01-22 11:13 ` [RFC PATCH 04/11] ARM: Add a printk loglevel modifier Uwe Kleine-König
2012-01-23 5:50 ` Jean-Christophe PLAGNIOL-VILLARD
2012-01-22 11:13 ` [RFC PATCH 05/11] ARM: provide XIP_VIRT_ADDR for no-MMU builds Uwe Kleine-König
2012-01-22 11:13 ` [RFC PATCH 06/11] Cortex-M3: Add base support for Cortex-M3 Uwe Kleine-König
2012-01-22 19:45 ` Michał Mirosław
2012-01-22 20:42 ` Uwe Kleine-König
2012-01-22 11:13 ` [RFC PATCH 07/11] Cortex-M3: Add support for exception handling Uwe Kleine-König
2012-01-22 11:13 ` [RFC PATCH 08/11] Cortex-M3: Add NVIC support Uwe Kleine-König
2012-01-31 19:39 ` Uwe Kleine-König
2012-01-22 11:13 ` [RFC PATCH 09/11] Cortex-M3: Allow the building of Cortex-M3 kernel port Uwe Kleine-König
2012-01-22 20:05 ` Michał Mirosław
2012-02-07 19:43 ` Uwe Kleine-König
2012-01-22 11:13 ` [RFC PATCH 10/11] Cortex-M3: Add VFP support Uwe Kleine-König
2012-01-22 11:13 ` [RFC PATCH 11/11] HACK! ARM: no, we don't enter in ARM Uwe Kleine-König
2012-02-07 20:18 ` [RFC PATCH 00/11] Cortex-M3 support Uwe Kleine-König
2012-02-16 20:01 ` Uwe Kleine-König
2012-02-16 20:18 ` [PATCH 1/5] ARM: protect usage of cr_alignment by #ifdef CONFIG_CPU_CP15 Uwe Kleine-König
2012-02-16 20:18 ` [PATCH 2/5] ARM: Add a printk loglevel modifier Uwe Kleine-König
2012-02-16 20:18 ` [PATCH 3/5] ARM: force branch instructions to use long distance encoding Uwe Kleine-König
2012-02-16 20:18 ` [PATCH 4/5] ARM: Cortex-M3: Add base support for Cortex-M3 Uwe Kleine-König
2012-02-16 20:18 ` [PATCH 5/5] ARM: Cortex-M3: Add support for exception handling Uwe Kleine-König
2012-02-16 22:20 ` Russell King - ARM Linux [this message]
2012-02-24 22:01 ` Uwe Kleine-König
2012-02-24 22:12 ` Catalin Marinas
2012-02-24 22:43 ` Russell King - ARM Linux
2012-02-25 8:49 ` Catalin Marinas
2012-02-25 14:07 ` Uwe Kleine-König
2012-03-05 17:04 ` [PATCH v2 4/5] Cortex-M3: Add base support for Cortex-M3 Uwe Kleine-König
2012-03-05 17:04 ` [PATCH v2 5/5] Cortex-M3: Add support for exception handling Uwe Kleine-König
2012-03-09 17:10 ` Catalin Marinas
2012-03-13 20:39 ` Uwe Kleine-König
2012-03-08 10:52 ` [PATCH v2 4/5] Cortex-M3: Add base support for Cortex-M3 Catalin Marinas
2012-02-17 0:28 ` [PATCH 1/5] ARM: protect usage of cr_alignment by #ifdef CONFIG_CPU_CP15 Ryan Mallon
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