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1998-08-26 17:48 Ulrich Drepper <drepper@cygnus.com> * elf/dl-close.c (_dl_close): Move map->l_nsearchlist value into local variable so that map can be freed. Reported by Philippe Troin <phil@fifi.org>. * elf/dl-open.c (dl_open_worker): Correct test for extending global scope array. Patch by Philippe Troin <phil@fifi.org>. 1998-08-26 Geoff Keating <geoffk@ozemail.com.au> * sysdeps/powerpc/register-dump.h: Rewrite. Much nicer this way. Don't call writev() with a 100-element vector. * sysdeps/generic/segfault.c (catch_segfault): Skip top-level NULL return address. * sysdeps/powerpc/elf/libc-start.c: Sync up with generic version. In particular, set __libc_stack_end. * sysdeps/powerpc/elf/start.S: Allow _init and _fini to be undefined. Fix copyright notice. 1998-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * math/Makefile (gmp-objs): New variable. ($(objpfx)atest-exp, $(objpfx)atest-sincos, $(objpfx)atest-exp2): Depend on it. (tests): Add atest-exp atest-sincos atest-exp2. (tests-static): Remove atest-exp atest-sincos atest-exp2. * elf/rtld.c (dl_main): Unload map file before jumping to user code.
111 lines
4.5 KiB
C
111 lines
4.5 KiB
C
/* Dump registers.
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Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sys/uio.h>
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#include <stdio-common/_itoa.h>
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/* This prints out the information in the following form: */
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static const char dumpform[] =
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"Register dump:\n\
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r0 =0000000% sp =0000000% r2 =0000000% r3 =0000000% r4 =0000000% r5 =0000000%
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r6 =0000000% r7 =0000000% r8 =0000000% r9 =0000000% r10=0000000% r11=0000000%
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r12=0000000% r13=0000000% r14=0000000% r15=0000000% r16=0000000% r17=0000000%
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r18=0000000% r19=0000000% r20=0000000% r21=0000000% r22=0000000% r23=0000000%
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r24=0000000% r25=0000000% r26=0000000% r27=0000000% r28=0000000% r29=0000000%
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r30=0000000% r31=0000000% sr0=0000000% msr=0000000% r3*=0000000% ctr=0000000%
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lr =0000000% xer=0000000% ccr=0000000% sr1=0000000% trap=0000000%
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address of fault=0000000% dsisr=0000000%\n";
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/* Most of the fields are self-explanatory. 'sr0' is the next
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instruction to execute, from SRR0, which may have some relationship
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with the instruction that caused the exception. 'r3*' is the value
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that will be returned in register 3 when the current system call
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returns. 'sr1' is SRR1, bits 16-31 of which are copied from the MSR:
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16 - External interrupt enable
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17 - Privilege level (1=user, 0=supervisor)
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18 - FP available
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19 - Machine check enable (if clear, processor locks up on machine check)
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20 - FP exception mode bit 0 (FP exceptions recoverable)
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21 - Single-step trace enable
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22 - Branch trace enable
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23 - FP exception mode bit 1
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25 - exception prefix (if set, exceptions are taken from 0xFFFnnnnn,
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otherwise from 0x000nnnnn).
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26 - Instruction address translation enabled.
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27 - Data address translation enabled.
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30 - Exception is recoverable (otherwise, don't try to return).
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31 - Little-endian mode enable.
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'Trap' is the address of the exception:
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00200 - Machine check exception (memory parity error, for instance)
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00300 - Data access exception (memory not mapped, see dsisr for why)
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00400 - Instruction access exception (memory not mapped)
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00500 - External interrupt
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00600 - Alignment exception (see dsisr for more information)
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00700 - Program exception (illegal/trap instruction, FP exception)
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00800 - FP unavailable (should not be seen by user code)
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00900 - Decrementer exception (for instance, SIGALRM)
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00A00 - I/O controller interface exception
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00C00 - System call exception (for instance, kill(3)).
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00E00 - FP assist exception (optional FP instructions, etc.)
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'address of fault' is the memory location that wasn't mapped
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(from the DAR). 'dsisr' has the following bits under trap 00300:
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0 - direct-store error exception
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1 - no page table entry for page
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4 - memory access not permitted
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5 - trying to access I/O controller space or using lwarx/stwcx on
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non-write-cached memory
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6 - access was store
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9 - data access breakpoint hit
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10 - segment table search failed to find translation (64-bit ppcs only)
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11 - I/O controller instruction not permitted
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For trap 00400, the same bits are set in SRR1 instead.
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For trap 00600, bits 12-31 of the DSISR set to allow emulation of
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the instruction without actually having to read it from memory.
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*/
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static void
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register_dump (int fd, void **ctx)
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{
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char buffer[sizeof(dumpform)];
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char *bufferpos = buffer;
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int i = 0;
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memcpy(buffer, dumpform, sizeof(dumpform));
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ctx += 8; /* FIXME!!!! Why is this necessary? Is it necessary? */
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/* Generate the output. */
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while ((bufferpos = memchr (bufferpos, '%', sizeof(dumpform))))
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{
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*bufferpos++ = '0';
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_itoa_word ((unsigned long int)(ctx[i]), bufferpos, 16, 0);
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i++;
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}
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/* Write the output. */
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write (fd, buffer, sizeof(buffer));
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}
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#define REGISTER_DUMP \
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register_dump (fd, ctx)
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