Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753544Ab0DLGGy (ORCPT ); Mon, 12 Apr 2010 02:06:54 -0400 Received: from sj-iport-4.cisco.com ([171.68.10.86]:11364 "EHLO sj-iport-4.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753468Ab0DLGGv (ORCPT ); Mon, 12 Apr 2010 02:06:51 -0400 Authentication-Results: sj-iport-4.cisco.com; dkim=neutral (message not signed) header.i=none X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AvsEAKlVwkurRN+J/2dsb2JhbACbM3GhN5gUhQwEgyU X-IronPort-AV: E=Sophos;i="4.52,188,1270425600"; d="scan'208";a="113732065" Date: Sun, 11 Apr 2010 23:06:51 -0700 From: David VomLehn To: to@dvomlehn-lnx2.corp.sa.net, "linux-arch@vger.kernel.org"@cisco.com, linux-arch@vger.kernel.org Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, maint_arch@dvomlehn-lnx2.corp.sa.net Subject: [PATCH 14/23] Make register values available to MN10300 panic notifiers Message-ID: <20100412060651.GA25653@dvomlehn-lnx2.corp.sa.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3904 Lines: 130 The save_ptregs() function has not been tested or even built. I will need help to complete this. Signed-off-by: David VomLehn --- arch/mn10300/include/asm/ptrace.h | 92 +++++++++++++++++++++++++++++++++++++ arch/mn10300/kernel/traps.c | 2 +- 2 files changed, 93 insertions(+), 1 deletions(-) diff --git a/arch/mn10300/include/asm/ptrace.h b/arch/mn10300/include/asm/ptrace.h index 1b0ba5e..e8e3548 100644 --- a/arch/mn10300/include/asm/ptrace.h +++ b/arch/mn10300/include/asm/ptrace.h @@ -102,6 +102,98 @@ extern void show_regs(struct pt_regs *); extern void user_enable_single_step(struct task_struct *); extern void user_disable_single_step(struct task_struct *); +/* Macros for saving the contents of registers and for the output constraint + * for those registers */ +#define PTREG_SAVE(r, name) "mov " #r ", %[" #name "]\n" +#define PTREG_SAVE_D(i) PTREG_SAVE_I(d, d, i) +#define PTREG_SAVE_A(i) PTREG_SAVE_I(a, a, i) +#define PTREG_SAVE_E(i) PTREG_SAVE_I(e, e, i) + +#define PTREG_OUT_D(regs, i) PTREG_OUT_I(regs, d, d, i) +#define PTREG_OUT_A(regs, i) PTREG_OUT_I(regs, a, a, i) +#define PTREG_OUT_E(regs, i) PTREG_OUT_I(regs, e, e, i) + +#define arch_has_save_ptregs 1 + +/** + * save_ptregs - save processor registers for backtracing + * @regs: Pointer to &struct pt_regs structure in which to save the + * registers + * + * Returns a constant pointer to @regs. + * + * This function must be called first in a function. There must be no + * auto variables defined that are initialized before calling this function. + */ +static __always_inline +const struct pt_regs *save_ptregs(struct pt_regs *regs) +{ + __asm__ __volatile__ ( + PTREG_SAVE_A(3) + PTREG_SAVE_A(2) + PTREG_SAVE_D(3) + PTREG_SAVE_D(2) + PTREG_SAVE(mcvf, mcvf) + PTREG_SAVE(mcrl, mcrl) + PTREG_SAVE(mcrh, mcrh) + PTREG_SAVE(mdrq, mdrq) + PTREG_SAVE_E(1) + PTREG_SAVE_E(0) + PTREG_SAVE_E(7) + PTREG_SAVE_E(6) + PTREG_SAVE_E(5) + PTREG_SAVE_E(4) + PTREG_SAVE_E(3) + PTREG_SAVE_E(2) + PTREG_SAVE(sp, sp) + PTREG_SAVE(lar, lar) + PTREG_SAVE(lir, lir) + PTREG_SAVE(mdr, mdr) + PTREG_SAVE_A(1) + PTREG_SAVE_A(0) + PTREG_SAVE_D(1) + PTREG_SAVE_D(0) + PTREG_SAVE(next, next) + PTREG_SAVE(orig_d0, orig_d0) + PTREG_SAVE(epsw, epsw) + "1:\n" + "mov 1b, a0\n" + PTREG_SAVE(a0, pc) + : + PTREG_OUT_A(regs, 3) + PTREG_OUT_A(regs, 2) + PTREG_OUT_D(regs, 3) + PTREG_OUT_D(regs, 2) + PTREG_OUT(regs, mcvf, mcvf) + PTREG_OUT(regs, mcrl, mcrl) + PTREG_OUT(regs, mcrh, mcrh) + PTREG_OUT(regs, mdrq, mdrq) + PTREG_OUT_E(regs, 1) + PTREG_OUT_E(regs, 0) + PTREG_OUT_E(regs, 7) + PTREG_OUT_E(regs, 6) + PTREG_OUT_E(regs, 5) + PTREG_OUT_E(regs, 4) + PTREG_OUT_E(regs, 3) + PTREG_OUT_E(regs, 2) + PTREG_OUT(regs, sp, sp) + PTREG_OUT(regs, lar, lar) + PTREG_OUT(regs, lir, lir) + PTREG_OUT(regs, mdr, mdr) + PTREG_OUT_A(regs, 1) + PTREG_OUT_A(regs, 0) + PTREG_OUT_D(regs, 1) + PTREG_OUT_D(regs, 0) + PTREG_OUT(regs, next, next) + PTREG_OUT(regs, orig_d0, orig_d0) + PTREG_OUT(regs, epsw, epsw) + PTREG_OUT(regs, pc, pc) + : + "a0" + ); + + return regs; +} #endif /* !__ASSEMBLY */ #define profile_pc(regs) ((regs)->pc) diff --git a/arch/mn10300/kernel/traps.c b/arch/mn10300/kernel/traps.c index 91365ad..0251adf 100644 --- a/arch/mn10300/kernel/traps.c +++ b/arch/mn10300/kernel/traps.c @@ -471,7 +471,7 @@ asmlinkage void io_bus_error(u32 bcberr, u32 bcbear, struct pt_regs *regs) printk(KERN_EMERG "\n"); show_registers(regs); - panic("Halted due to asynchronous I/O Bus Error\n"); + panic_with_regs(regs, "Halted due to asynchronous I/O Bus Error\n"); } /* -- 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/