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linux/arch/blackfin/kernel/asm-offsets.c
Graf Yang 01b9f4b0ed Blackfin: improve double fault debug handling 
Since the hardware only provides reporting for the last exception handled,
and the values are valid only when executing the exception handler, we
need to save the context for reporting at a later point.  While we do this
for one exception, it doesn't work properly when handling a second one as
the original exception is clobbered by the double fault.  So when double
fault debugging is enabled, create a dedicated shadow of these values and
save/restore out of there.  Now the crash report properly displays the
first exception as well as the second one.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:31:57 -04:00

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C
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/*
* File: arch/blackfin/kernel/asm-offsets.c
* Based on:
* Author:
*
* Created:
* Description: generate definitions needed by assembly language modules.
*
* Modified:
* Copyright 2004-2006 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <linux/ptrace.h>
#include <linux/hardirq.h>
#include <linux/irq.h>
#include <linux/thread_info.h>
#include <linux/kbuild.h>
int main(void)
{
/* offsets into the task struct */
DEFINE(TASK_STATE, offsetof(struct task_struct, state));
DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked));
DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
DEFINE(TASK_MM, offsetof(struct task_struct, mm));
DEFINE(TASK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
DEFINE(TASK_SIGPENDING, offsetof(struct task_struct, pending));
/* offsets into the irq_cpustat_t struct */
DEFINE(CPUSTAT_SOFTIRQ_PENDING,
offsetof(irq_cpustat_t, __softirq_pending));
/* offsets into the thread struct */
DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
DEFINE(THREAD_USP, offsetof(struct thread_struct, usp));
DEFINE(THREAD_SR, offsetof(struct thread_struct, seqstat));
DEFINE(PT_SR, offsetof(struct thread_struct, seqstat));
DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0));
DEFINE(THREAD_PC, offsetof(struct thread_struct, pc));
DEFINE(KERNEL_STACK_SIZE, THREAD_SIZE);
/* offsets into the pt_regs */
DEFINE(PT_ORIG_R0, offsetof(struct pt_regs, orig_r0));
DEFINE(PT_ORIG_P0, offsetof(struct pt_regs, orig_p0));
DEFINE(PT_ORIG_PC, offsetof(struct pt_regs, orig_pc));
DEFINE(PT_R0, offsetof(struct pt_regs, r0));
DEFINE(PT_R1, offsetof(struct pt_regs, r1));
DEFINE(PT_R2, offsetof(struct pt_regs, r2));
DEFINE(PT_R3, offsetof(struct pt_regs, r3));
DEFINE(PT_R4, offsetof(struct pt_regs, r4));
DEFINE(PT_R5, offsetof(struct pt_regs, r5));
DEFINE(PT_R6, offsetof(struct pt_regs, r6));
DEFINE(PT_R7, offsetof(struct pt_regs, r7));
DEFINE(PT_P0, offsetof(struct pt_regs, p0));
DEFINE(PT_P1, offsetof(struct pt_regs, p1));
DEFINE(PT_P2, offsetof(struct pt_regs, p2));
DEFINE(PT_P3, offsetof(struct pt_regs, p3));
DEFINE(PT_P4, offsetof(struct pt_regs, p4));
DEFINE(PT_P5, offsetof(struct pt_regs, p5));
DEFINE(PT_FP, offsetof(struct pt_regs, fp));
DEFINE(PT_USP, offsetof(struct pt_regs, usp));
DEFINE(PT_I0, offsetof(struct pt_regs, i0));
DEFINE(PT_I1, offsetof(struct pt_regs, i1));
DEFINE(PT_I2, offsetof(struct pt_regs, i2));
DEFINE(PT_I3, offsetof(struct pt_regs, i3));
DEFINE(PT_M0, offsetof(struct pt_regs, m0));
DEFINE(PT_M1, offsetof(struct pt_regs, m1));
DEFINE(PT_M2, offsetof(struct pt_regs, m2));
DEFINE(PT_M3, offsetof(struct pt_regs, m3));
DEFINE(PT_L0, offsetof(struct pt_regs, l0));
DEFINE(PT_L1, offsetof(struct pt_regs, l1));
DEFINE(PT_L2, offsetof(struct pt_regs, l2));
DEFINE(PT_L3, offsetof(struct pt_regs, l3));
DEFINE(PT_B0, offsetof(struct pt_regs, b0));
DEFINE(PT_B1, offsetof(struct pt_regs, b1));
DEFINE(PT_B2, offsetof(struct pt_regs, b2));
DEFINE(PT_B3, offsetof(struct pt_regs, b3));
DEFINE(PT_A0X, offsetof(struct pt_regs, a0x));
DEFINE(PT_A0W, offsetof(struct pt_regs, a0w));
DEFINE(PT_A1X, offsetof(struct pt_regs, a1x));
DEFINE(PT_A1W, offsetof(struct pt_regs, a1w));
DEFINE(PT_LC0, offsetof(struct pt_regs, lc0));
DEFINE(PT_LC1, offsetof(struct pt_regs, lc1));
DEFINE(PT_LT0, offsetof(struct pt_regs, lt0));
DEFINE(PT_LT1, offsetof(struct pt_regs, lt1));
DEFINE(PT_LB0, offsetof(struct pt_regs, lb0));
DEFINE(PT_LB1, offsetof(struct pt_regs, lb1));
DEFINE(PT_ASTAT, offsetof(struct pt_regs, astat));
DEFINE(PT_RESERVED, offsetof(struct pt_regs, reserved));
DEFINE(PT_RETS, offsetof(struct pt_regs, rets));
DEFINE(PT_PC, offsetof(struct pt_regs, pc));
DEFINE(PT_RETX, offsetof(struct pt_regs, retx));
DEFINE(PT_RETN, offsetof(struct pt_regs, retn));
DEFINE(PT_RETE, offsetof(struct pt_regs, rete));
DEFINE(PT_SEQSTAT, offsetof(struct pt_regs, seqstat));
DEFINE(PT_SYSCFG, offsetof(struct pt_regs, syscfg));
DEFINE(PT_IPEND, offsetof(struct pt_regs, ipend));
DEFINE(SIZEOF_PTREGS, sizeof(struct pt_regs));
DEFINE(PT_TEXT_ADDR, sizeof(struct pt_regs)); /* Needed by gdb */
DEFINE(PT_TEXT_END_ADDR, 4 + sizeof(struct pt_regs));/* Needed by gdb */
DEFINE(PT_DATA_ADDR, 8 + sizeof(struct pt_regs)); /* Needed by gdb */
DEFINE(PT_FDPIC_EXEC, 12 + sizeof(struct pt_regs)); /* Needed by gdb */
DEFINE(PT_FDPIC_INTERP, 16 + sizeof(struct pt_regs));/* Needed by gdb */
/* signal defines */
DEFINE(SIGSEGV, SIGSEGV);
DEFINE(SIGTRAP, SIGTRAP);
/* PDA management (in L1 scratchpad) */
DEFINE(PDA_SYSCFG, offsetof(struct blackfin_pda, syscfg));
#ifdef CONFIG_SMP
DEFINE(PDA_IRQFLAGS, offsetof(struct blackfin_pda, imask));
#endif
DEFINE(PDA_IPDT, offsetof(struct blackfin_pda, ipdt));
DEFINE(PDA_IPDT_SWAPCOUNT, offsetof(struct blackfin_pda, ipdt_swapcount));
DEFINE(PDA_DPDT, offsetof(struct blackfin_pda, dpdt));
DEFINE(PDA_DPDT_SWAPCOUNT, offsetof(struct blackfin_pda, dpdt_swapcount));
DEFINE(PDA_EXIPTR, offsetof(struct blackfin_pda, ex_iptr));
DEFINE(PDA_EXOPTR, offsetof(struct blackfin_pda, ex_optr));
DEFINE(PDA_EXBUF, offsetof(struct blackfin_pda, ex_buf));
DEFINE(PDA_EXIMASK, offsetof(struct blackfin_pda, ex_imask));
DEFINE(PDA_EXSTACK, offsetof(struct blackfin_pda, ex_stack));
DEFINE(PDA_EXIPEND, offsetof(struct blackfin_pda, ex_ipend));
#ifdef ANOMALY_05000261
DEFINE(PDA_LFRETX, offsetof(struct blackfin_pda, last_cplb_fault_retx));
#endif
DEFINE(PDA_DCPLB, offsetof(struct blackfin_pda, dcplb_fault_addr));
DEFINE(PDA_ICPLB, offsetof(struct blackfin_pda, icplb_fault_addr));
DEFINE(PDA_RETX, offsetof(struct blackfin_pda, retx));
DEFINE(PDA_SEQSTAT, offsetof(struct blackfin_pda, seqstat));
#ifdef CONFIG_DEBUG_DOUBLEFAULT
DEFINE(PDA_DF_DCPLB, offsetof(struct blackfin_pda, dcplb_doublefault_addr));
DEFINE(PDA_DF_ICPLB, offsetof(struct blackfin_pda, icplb_doublefault_addr));
DEFINE(PDA_DF_SEQSTAT, offsetof(struct blackfin_pda, seqstat_doublefault));
DEFINE(PDA_DF_RETX, offsetof(struct blackfin_pda, retx_doublefault));
#endif
#ifdef CONFIG_SMP
/* Inter-core lock (in L2 SRAM) */
DEFINE(SIZEOF_CORELOCK, sizeof(struct corelock_slot));
#endif
return 0;
}
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