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115 lines
3.3 KiB
115 lines
3.3 KiB
/* Fetch live process registers from TID. |
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Copyright (C) 2013 Red Hat, Inc. |
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This file is part of elfutils. |
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This file is free software; you can redistribute it and/or modify |
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it under the terms of either |
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* the GNU Lesser General Public License as published by the Free |
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Software Foundation; either version 3 of the License, or (at |
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your option) any later version |
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or |
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* the GNU General Public License as published by the Free |
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Software Foundation; either version 2 of the License, or (at |
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your option) any later version |
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or both in parallel, as here. |
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elfutils is distributed in the hope that it will be useful, but |
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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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General Public License for more details. |
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You should have received copies of the GNU General Public License and |
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the GNU Lesser General Public License along with this program. If |
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not, see <http://www.gnu.org/licenses/>. */ |
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#ifdef HAVE_CONFIG_H |
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# include <config.h> |
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#endif |
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#include <stdlib.h> |
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#if defined(__powerpc__) && defined(__linux__) |
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# include <sys/ptrace.h> |
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# include <sys/user.h> |
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#endif |
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#include "system.h" |
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#define BACKEND ppc_ |
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#include "libebl_CPU.h" |
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bool |
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ppc_dwarf_to_regno (Ebl *ebl __attribute__ ((unused)), unsigned *regno) |
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{ |
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switch (*regno) |
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{ |
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case 108: |
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// LR uses both 65 and 108 numbers, there is no consistency for it. |
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*regno = 65; |
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return true; |
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case 0 ... 107: |
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case 109 ... (114 - 1) -1: |
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return true; |
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case 1200 ... 1231: |
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*regno = *regno - 1200 + (114 - 1); |
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return true; |
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default: |
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return false; |
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} |
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abort (); |
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} |
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__typeof (ppc_dwarf_to_regno) |
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ppc64_dwarf_to_regno |
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__attribute__ ((alias ("ppc_dwarf_to_regno"))); |
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bool |
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ppc_set_initial_registers_tid (pid_t tid __attribute__ ((unused)), |
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ebl_tid_registers_t *setfunc __attribute__ ((unused)), |
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void *arg __attribute__ ((unused))) |
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{ |
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#if !defined(__powerpc__) || !defined(__linux__) |
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return false; |
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#else /* __powerpc__ */ |
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union |
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{ |
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struct pt_regs r; |
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long l[sizeof (struct pt_regs) / sizeof (long)]; |
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} |
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user_regs; |
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eu_static_assert (sizeof (struct pt_regs) % sizeof (long) == 0); |
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/* PTRACE_GETREGS is EIO on kernel-2.6.18-308.el5.ppc64. */ |
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errno = 0; |
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for (unsigned regno = 0; regno < sizeof (user_regs) / sizeof (long); |
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regno++) |
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{ |
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user_regs.l[regno] = ptrace (PTRACE_PEEKUSER, tid, |
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(void *) (uintptr_t) (regno |
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* sizeof (long)), |
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NULL); |
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if (errno != 0) |
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return false; |
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} |
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#define GPRS (sizeof (user_regs.r.gpr) / sizeof (*user_regs.r.gpr)) |
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Dwarf_Word dwarf_regs[GPRS]; |
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for (unsigned gpr = 0; gpr < GPRS; gpr++) |
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dwarf_regs[gpr] = user_regs.r.gpr[gpr]; |
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if (! setfunc (0, GPRS, dwarf_regs, arg)) |
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return false; |
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dwarf_regs[0] = user_regs.r.link; |
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// LR uses both 65 and 108 numbers, there is no consistency for it. |
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if (! setfunc (65, 1, dwarf_regs, arg)) |
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return false; |
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/* Registers like msr, ctr, xer, dar, dsisr etc. are probably irrelevant |
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for CFI. */ |
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dwarf_regs[0] = user_regs.r.nip; |
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return setfunc (-1, 1, dwarf_regs, arg); |
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#endif /* __powerpc__ */ |
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} |
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__typeof (ppc_set_initial_registers_tid) |
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ppc64_set_initial_registers_tid |
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__attribute__ ((alias ("ppc_set_initial_registers_tid")));
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