Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761516AbXLTMBz (ORCPT ); Thu, 20 Dec 2007 07:01:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760820AbXLTMAY (ORCPT ); Thu, 20 Dec 2007 07:00:24 -0500 Received: from mx1.redhat.com ([66.187.233.31]:38359 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759311AbXLTMAM (ORCPT ); Thu, 20 Dec 2007 07:00:12 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit From: Roland McGrath To: Andrew Morton , Linus Torvalds X-Fcc: ~/Mail/linus Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Cc: linuxppc-dev@ozlabs.org, Paul Mackerras In-Reply-To: Roland McGrath's message of Thursday, 20 December 2007 03:52:00 -0800 <20071220115200.C767E26F98A@magilla.localdomain> References: <20071220115200.C767E26F98A@magilla.localdomain> Subject: [PATCH -mm 14/43] powerpc user_regset gpr Message-Id: <20071220115755.29B5E26F98B@magilla.localdomain> Date: Thu, 20 Dec 2007 03:57:55 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3659 Lines: 120 This implements user_regset-style accessors for the powerpc general registers. In the future these functions will be the only place that needs to understand the user_regset layout (core dump format) and how it maps to the internal representation of user thread state. Signed-off-by: Roland McGrath --- arch/powerpc/kernel/ptrace.c | 91 ++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 91 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 4edc118..e493fc0 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -119,6 +119,97 @@ int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data) return -EIO; } +static int gpr_get(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + int ret; + + if (target->thread.regs == NULL) + return -EIO; + + CHECK_FULL_REGS(target->thread.regs); + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + target->thread.regs, + 0, offsetof(struct pt_regs, msr)); + if (!ret) { + unsigned long msr = get_user_msr(target); + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr, + offsetof(struct pt_regs, msr), + offsetof(struct pt_regs, msr) + + sizeof(msr)); + } + + BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) != + offsetof(struct pt_regs, msr) + sizeof(long)); + + if (!ret) + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.regs->orig_gpr3, + offsetof(struct pt_regs, orig_gpr3), + sizeof(struct pt_regs)); + if (!ret) + ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, + sizeof(struct pt_regs), -1); + + return ret; +} + +static int gpr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + unsigned long reg; + int ret; + + if (target->thread.regs == NULL) + return -EIO; + + CHECK_FULL_REGS(target->thread.regs); + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + target->thread.regs, + 0, PT_MSR * sizeof(reg)); + + if (!ret && count > 0) { + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, + PT_MSR * sizeof(reg), + (PT_MSR + 1) * sizeof(reg)); + if (!ret) + ret = set_user_msr(target, reg); + } + + BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) != + offsetof(struct pt_regs, msr) + sizeof(long)); + + if (!ret) + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.regs->orig_gpr3, + PT_ORIG_R3 * sizeof(reg), + (PT_MAX_PUT_REG + 1) * sizeof(reg)); + + if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret) + ret = user_regset_copyin_ignore( + &pos, &count, &kbuf, &ubuf, + (PT_MAX_PUT_REG + 1) * sizeof(reg), + PT_TRAP * sizeof(reg)); + + if (!ret && count > 0) { + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, + PT_TRAP * sizeof(reg), + (PT_TRAP + 1) * sizeof(reg)); + if (!ret) + ret = set_user_trap(target, reg); + } + + if (!ret) + ret = user_regset_copyin_ignore( + &pos, &count, &kbuf, &ubuf, + (PT_TRAP + 1) * sizeof(reg), -1); + + return ret; +} static int fpr_get(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, -- 1.5.3.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/