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author | Elliott Hughes <enh@google.com> | 2015-02-18 22:19:45 -0800 |
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committer | Elliott Hughes <enh@google.com> | 2015-02-18 23:24:43 -0800 |
commit | 03333823c75a1c1887e923828113a1b0fd12020c (patch) | |
tree | a63e40b5dd9927bd04ec7427c8797975c2a71f85 /src/backends/ppc_initreg.c | |
parent | b48bfdc826ebdd316d5d8a4ff8f213391f1c710b (diff) | |
download | android_external_elfutils-03333823c75a1c1887e923828113a1b0fd12020c.tar.gz android_external_elfutils-03333823c75a1c1887e923828113a1b0fd12020c.tar.bz2 android_external_elfutils-03333823c75a1c1887e923828113a1b0fd12020c.zip |
Upgrade to elfutils 0.161.
Change-Id: Iee07e1329d9750f092afc6c2fbd6af8db32862b0
Diffstat (limited to 'src/backends/ppc_initreg.c')
-rw-r--r-- | src/backends/ppc_initreg.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/backends/ppc_initreg.c b/src/backends/ppc_initreg.c new file mode 100644 index 00000000..64f53793 --- /dev/null +++ b/src/backends/ppc_initreg.c @@ -0,0 +1,114 @@ +/* Fetch live process registers from TID. + Copyright (C) 2013 Red Hat, Inc. + This file is part of elfutils. + + This file is free software; you can redistribute it and/or modify + it under the terms of either + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at + your option) any later version + + or + + * 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 + + or both in parallel, as here. + + elfutils 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 copies of the GNU General Public License and + the GNU Lesser General Public License along with this program. If + not, see <http://www.gnu.org/licenses/>. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include "system.h" +#include <stdlib.h> +#ifdef __powerpc__ +# include <sys/user.h> +# include <sys/ptrace.h> +#endif + +#define BACKEND ppc_ +#include "libebl_CPU.h" + +bool +ppc_dwarf_to_regno (Ebl *ebl __attribute__ ((unused)), unsigned *regno) +{ + switch (*regno) + { + case 108: + // LR uses both 65 and 108 numbers, there is no consistency for it. + *regno = 65; + return true; + case 0 ... 107: + case 109 ... (114 - 1) -1: + return true; + case 1200 ... 1231: + *regno = *regno - 1200 + (114 - 1); + return true; + default: + return false; + } + abort (); +} + +__typeof (ppc_dwarf_to_regno) + ppc64_dwarf_to_regno + __attribute__ ((alias ("ppc_dwarf_to_regno"))); + +bool +ppc_set_initial_registers_tid (pid_t tid __attribute__ ((unused)), + ebl_tid_registers_t *setfunc __attribute__ ((unused)), + void *arg __attribute__ ((unused))) +{ +#ifndef __powerpc__ + return false; +#else /* __powerpc__ */ + union + { + struct pt_regs r; + long l[sizeof (struct pt_regs) / sizeof (long)]; + } + user_regs; + eu_static_assert (sizeof (struct pt_regs) % sizeof (long) == 0); + /* PTRACE_GETREGS is EIO on kernel-2.6.18-308.el5.ppc64. */ + errno = 0; + for (unsigned regno = 0; regno < sizeof (user_regs) / sizeof (long); + regno++) + { + user_regs.l[regno] = ptrace (PTRACE_PEEKUSER, tid, + (void *) (uintptr_t) (regno + * sizeof (long)), + NULL); + if (errno != 0) + return false; + } + const size_t gprs = sizeof (user_regs.r.gpr) / sizeof (*user_regs.r.gpr); + Dwarf_Word dwarf_regs[gprs]; + for (unsigned gpr = 0; gpr < gprs; gpr++) + dwarf_regs[gpr] = user_regs.r.gpr[gpr]; + if (! setfunc (0, gprs, dwarf_regs, arg)) + return false; + dwarf_regs[0] = user_regs.r.link; + // LR uses both 65 and 108 numbers, there is no consistency for it. + if (! setfunc (65, 1, dwarf_regs, arg)) + return false; + /* Registers like msr, ctr, xer, dar, dsisr etc. are probably irrelevant + for CFI. */ + dwarf_regs[0] = user_regs.r.nip; + return setfunc (-1, 1, dwarf_regs, arg); +#endif /* __powerpc__ */ +} + +__typeof (ppc_set_initial_registers_tid) + ppc64_set_initial_registers_tid + __attribute__ ((alias ("ppc_set_initial_registers_tid"))); |