From: tixy@linaro.org (Jon Medhurst (Tixy))
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 05/16] ARM: use a function table for determining instruction interpreter action
Date: Mon, 03 Feb 2014 14:24:58 +0000 [thread overview]
Message-ID: <1391437498.3509.11.camel@linaro1.home> (raw)
In-Reply-To: <1390507559-4697-6-git-send-email-dave.long@linaro.org>
On Thu, 2014-01-23 at 15:05 -0500, David Long wrote:
> From: "David A. Long" <dave.long@linaro.org>
>
> Make the instruction interpreter call back to semantic action functions
> through a function pointer array provided by the invoker. The interpreter
> decodes the instructions into groups and uses the group number to index
> into the supplied array. kprobes and uprobes code will each supply their
> own array of functions.
>
> Signed-off-by: David A. Long <dave.long@linaro.org>
> ---
[...]
> --- a/arch/arm/kernel/probes.c
> +++ b/arch/arm/kernel/probes.c
> @@ -378,10 +378,11 @@ static const int decode_struct_sizes[NUM_DECODE_TYPES] = {
> */
> int __kprobes
> kprobe_decode_insn(kprobe_opcode_t insn, struct arch_specific_insn *asi,
> - const union decode_item *table, bool thumb)
> + const union decode_item *table, bool thumb,
> + const union decode_action *actions)
> {
> - const struct decode_header *h = (struct decode_header *)table;
> - const struct decode_header *next;
> + struct decode_header *h = (struct decode_header *)table;
> + struct decode_header *next;
The decode tables are fixed structures which nothing should want to
modify, so I think the const's above should be kept. I believe that
you've had to resort to changing them because the following typedef
lacks a 'const' on the final argument....
[...]
> diff --git a/arch/arm/kernel/probes.h b/arch/arm/kernel/probes.h
> index c610fa9..81b6e61 100644
[...]
>
> +typedef enum kprobe_insn (probes_custom_decode_t)(kprobe_opcode_t,
> + struct arch_specific_insn *,
> + struct decode_header *);
> +
Adding 'const' above will also have the knock on effect of requiring
const on all the 'custom decode' functions as well.
--
Tixy
next prev parent reply other threads:[~2014-02-03 14:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-23 20:05 [PATCH v5 00/16] uprobes: Add uprobes support for ARM David Long
2014-01-23 20:05 ` [PATCH v5 01/16] uprobes: allow ignoring of probe hits David Long
2014-01-23 20:05 ` [PATCH v5 02/16] ARM: move shared uprobe/kprobe definitions into new include file David Long
2014-01-23 20:05 ` [PATCH v5 03/16] ARM: Move generic arm instruction parsing code to new files for sharing between features David Long
2014-01-23 20:05 ` [PATCH v5 04/16] ARM: move generic thumb instruction parsing code to new files for use by other feature David Long
2014-01-23 20:05 ` [PATCH v5 05/16] ARM: use a function table for determining instruction interpreter action David Long
2014-02-03 14:24 ` Jon Medhurst (Tixy) [this message]
2014-02-04 2:06 ` David Long
2014-01-23 20:05 ` [PATCH v5 06/16] ARM: Disable jprobes test when built into thumb-mode kernel David Long
2014-01-23 20:05 ` [PATCH v5 07/16] ARM: Remove use of struct kprobe from generic probes code David Long
2014-02-03 14:57 ` Jon Medhurst (Tixy)
2014-02-04 2:07 ` David Long
2014-01-23 20:05 ` [PATCH v5 08/16] ARM: Use new opcode type in ARM kprobes/uprobes code David Long
2014-01-23 20:05 ` [PATCH v5 09/16] ARM: Make the kprobes condition_check symbol names more generic David Long
2014-01-23 20:05 ` [PATCH v5 10/16] ARM: Change more ARM kprobes symbol names to something more David Long
2014-01-23 20:05 ` [PATCH v5 11/16] ARM: Rename the shared kprobes/uprobe return value enum David Long
2014-01-23 20:05 ` [PATCH v5 12/16] ARM: Change the remaining shared kprobes/uprobes symbols to something generic David Long
2014-01-23 20:05 ` [PATCH v5 13/16] ARM: Add an emulate flag to the kprobes/uprobes instruction decode functions David Long
2014-01-23 20:05 ` [PATCH v5 14/16] ARM: Make arch_specific_insn a define for new arch_probes_insn structure David Long
2014-01-23 20:05 ` [PATCH v5 15/16] ARM: add uprobes support David Long
2014-02-03 16:36 ` Jon Medhurst (Tixy)
2014-02-03 20:37 ` Rabin Vincent
2014-01-23 20:05 ` [PATCH v5 16/16] ARM: Remove uprobes dependency on kprobes David Long
2014-02-03 15:45 ` Jon Medhurst (Tixy)
2014-02-04 2:15 ` David Long
2014-02-03 16:44 ` [PATCH v5 00/16] uprobes: Add uprobes support for ARM Jon Medhurst (Tixy)
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