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Diffstat (limited to 'gnu/usr.bin/binutils/gdb/ppcobsd-tdep.c')
-rw-r--r--gnu/usr.bin/binutils/gdb/ppcobsd-tdep.c305
1 files changed, 305 insertions, 0 deletions
diff --git a/gnu/usr.bin/binutils/gdb/ppcobsd-tdep.c b/gnu/usr.bin/binutils/gdb/ppcobsd-tdep.c
new file mode 100644
index 00000000000..dd6afddd7ad
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/ppcobsd-tdep.c
@@ -0,0 +1,305 @@
+/* Target-dependent code for OpenBSD/powerpc.
+
+ Copyright 2004 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "arch-utils.h"
+#include "osabi.h"
+#include "regcache.h"
+#include "regset.h"
+
+#include "gdb_string.h"
+
+#include "ppc-tdep.h"
+#include "ppcobsd-tdep.h"
+#include "solib-svr4.h"
+
+
+/* Register set support functions. */
+
+/* FIXME: kettenis/20040418: There is nothing OpenBSD-specific about
+ the functions on this page; they were written to be as general as
+ possible. This stuff should probably be moved to rs6000-tdep.c or
+ perhaps a new ppc-tdep.c. */
+
+static void
+ppc_supply_reg (struct regcache *regcache, int regnum,
+ const char *regs, size_t offset)
+{
+ if (regnum != -1 && offset != -1)
+ regcache_raw_supply (regcache, regnum, regs + offset);
+}
+
+static void
+ppc_collect_reg (const struct regcache *regcache, int regnum,
+ char *regs, size_t offset)
+{
+ if (regnum != -1 && offset != -1)
+ regcache_raw_collect (regcache, regnum, regs + offset);
+}
+
+/* Supply the general-purpose registers stored in GREGS to REGCACHE. */
+
+void
+ppc_supply_gregset (const struct regset *regset, struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ const struct ppc_reg_offsets *offsets = regset->descr;
+ size_t offset;
+ int i;
+
+ for (i = 0, offset = offsets->r0_offset; i < 32; i++, offset += 4)
+ {
+ if (regnum == -1 || regnum == i)
+ ppc_supply_reg (regcache, i, gregs, offset);
+ }
+
+ if (regnum == -1 || regnum == PC_REGNUM)
+ ppc_supply_reg (regcache, PC_REGNUM, gregs, offsets->pc_offset);
+ if (regnum == -1 || regnum == tdep->ppc_ps_regnum)
+ ppc_supply_reg (regcache, tdep->ppc_ps_regnum,
+ gregs, offsets->ps_offset);
+ if (regnum == -1 || regnum == tdep->ppc_cr_regnum)
+ ppc_supply_reg (regcache, tdep->ppc_cr_regnum,
+ gregs, offsets->cr_offset);
+ if (regnum == -1 || regnum == tdep->ppc_lr_regnum)
+ ppc_supply_reg (regcache, tdep->ppc_lr_regnum,
+ gregs, offsets->lr_offset);
+ if (regnum == -1 || regnum == tdep->ppc_ctr_regnum)
+ ppc_supply_reg (regcache, tdep->ppc_ctr_regnum,
+ gregs, offsets->ctr_offset);
+ if (regnum == -1 || regnum == tdep->ppc_xer_regnum)
+ ppc_supply_reg (regcache, tdep->ppc_xer_regnum,
+ gregs, offsets->cr_offset);
+ if (regnum == -1 || regnum == tdep->ppc_mq_regnum)
+ ppc_supply_reg (regcache, tdep->ppc_mq_regnum, gregs, offsets->mq_offset);
+}
+
+/* Supply the floating-point registers stored in FPREGS to REGCACHE. */
+
+void
+ppc_supply_fpregset (const struct regset *regset, struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ const struct ppc_reg_offsets *offsets = regset->descr;
+ size_t offset;
+ int i;
+
+ offset = offsets->f0_offset;
+ for (i = FP0_REGNUM; i < FP0_REGNUM + 32; i++, offset += 4)
+ {
+ if (regnum == -1 || regnum == i)
+ ppc_supply_reg (regcache, i, fpregs, offset);
+ }
+
+ if (regnum == -1 || regnum == tdep->ppc_fpscr_regnum)
+ ppc_supply_reg (regcache, tdep->ppc_fpscr_regnum,
+ fpregs, offsets->fpscr_offset);
+}
+
+/* Collect the general-purpose registers from REGCACHE and store them
+ in GREGS. */
+
+void
+ppc_collect_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ const struct ppc_reg_offsets *offsets = &ppcobsd_reg_offsets;
+ size_t offset;
+ int i;
+
+ offset = offsets->r0_offset;
+ for (i = 0; i <= 32; i++, offset += 4)
+ {
+ if (regnum == -1 || regnum == i)
+ ppc_collect_reg (regcache, regnum, gregs, offset);
+ }
+
+ if (regnum == -1 || regnum == PC_REGNUM)
+ ppc_collect_reg (regcache, PC_REGNUM, gregs, offsets->pc_offset);
+ if (regnum == -1 || regnum == tdep->ppc_ps_regnum)
+ ppc_collect_reg (regcache, tdep->ppc_ps_regnum,
+ gregs, offsets->ps_offset);
+ if (regnum == -1 || regnum == tdep->ppc_cr_regnum)
+ ppc_collect_reg (regcache, tdep->ppc_cr_regnum,
+ gregs, offsets->cr_offset);
+ if (regnum == -1 || regnum == tdep->ppc_lr_regnum)
+ ppc_collect_reg (regcache, tdep->ppc_lr_regnum,
+ gregs, offsets->lr_offset);
+ if (regnum == -1 || regnum == tdep->ppc_ctr_regnum)
+ ppc_collect_reg (regcache, tdep->ppc_ctr_regnum,
+ gregs, offsets->ctr_offset);
+ if (regnum == -1 || regnum == tdep->ppc_xer_regnum)
+ ppc_collect_reg (regcache, tdep->ppc_xer_regnum,
+ gregs, offsets->xer_offset);
+ if (regnum == -1 || regnum == tdep->ppc_mq_regnum)
+ ppc_collect_reg (regcache, tdep->ppc_mq_regnum,
+ gregs, offsets->mq_offset);
+}
+
+/* Collect the floating-point registers from REGCACHE and store them
+ in FPREGS. */
+
+void
+ppc_collect_fpregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *fpregs, size_t len)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ const struct ppc_reg_offsets *offsets = &ppcobsd_reg_offsets;
+ size_t offset;
+ int i;
+
+ offset = offsets->f0_offset;
+ for (i = FP0_REGNUM; i <= FP0_REGNUM + 32; i++, offset += 4)
+ {
+ if (regnum == -1 || regnum == i)
+ ppc_collect_reg (regcache, regnum, fpregs, offset);
+ }
+
+ if (regnum == -1 || regnum == tdep->ppc_fpscr_regnum)
+ ppc_collect_reg (regcache, tdep->ppc_fpscr_regnum,
+ fpregs, offsets->fpscr_offset);
+}
+
+
+/* Register offsets from <machine/reg.h>. */
+struct ppc_reg_offsets ppcobsd_reg_offsets;
+
+
+/* Core file support. */
+
+/* Supply register REGNUM from the buffer specified by GREGS and LEN
+ in the general-purpose register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+void
+ppcobsd_supply_gregset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *gregs, size_t len)
+{
+ ppc_supply_gregset (regset, regcache, regnum, gregs, len);
+ ppc_supply_fpregset (regset, regcache, regnum, gregs, len);
+}
+
+void
+ppcobsd_collect_gregset (const struct regset *regset,
+ const struct regcache *regcache, int regnum,
+ void *gregs, size_t len)
+{
+ ppc_collect_gregset (regset, regcache, regnum, gregs, len);
+ ppc_collect_fpregset (regset, regcache, regnum, gregs, len);
+}
+
+/* OpenBS/macppc register set. */
+
+struct regset ppcobsd_gregset =
+{
+ &ppcobsd_reg_offsets,
+ ppcobsd_supply_gregset
+};
+
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+
+static const struct regset *
+ppcobsd_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
+{
+ if (strcmp (sect_name, ".reg") == 0 && sect_size >= 412)
+ return &ppcobsd_gregset;
+
+ return NULL;
+}
+
+
+static void
+ppcobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ /* OpenBSD uses SVR4-style shared libraries. */
+ set_gdbarch_in_solib_call_trampoline
+ (gdbarch, generic_in_solib_call_trampoline);
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ set_gdbarch_regset_from_core_section
+ (gdbarch, ppcobsd_regset_from_core_section);
+}
+
+
+/* OpenBSD uses uses the traditional NetBSD core file format, even for
+ ports that use ELF. */
+#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
+
+static enum gdb_osabi
+ppcobsd_core_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_NETBSD_CORE;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_ppcobsd_tdep (void);
+
+void
+_initialize_ppcobsd_tdep (void)
+{
+ /* BFD doesn't set a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_powerpc, bfd_target_unknown_flavour,
+ ppcobsd_core_osabi_sniffer);
+
+ gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_OPENBSD_ELF,
+ ppcobsd_init_abi);
+
+ /* Avoid initializing the register offsets again if they were
+ already initailized by ppcobsd-nat.c. */
+ if (ppcobsd_reg_offsets.pc_offset == 0)
+ {
+ /* General-purpose registers. */
+ ppcobsd_reg_offsets.r0_offset = 0;
+ ppcobsd_reg_offsets.pc_offset = 384;
+ ppcobsd_reg_offsets.ps_offset = 388;
+ ppcobsd_reg_offsets.cr_offset = 392;
+ ppcobsd_reg_offsets.lr_offset = 396;
+ ppcobsd_reg_offsets.ctr_offset = 400;
+ ppcobsd_reg_offsets.xer_offset = 404;
+ ppcobsd_reg_offsets.mq_offset = 408;
+
+ /* Floating-point registers. */
+ ppcobsd_reg_offsets.f0_offset = 128;
+ ppcobsd_reg_offsets.fpscr_offset = -1;
+
+ /* AltiVec registers. */
+ ppcobsd_reg_offsets.vr0_offset = 0;
+ ppcobsd_reg_offsets.vscr_offset = 512;
+ ppcobsd_reg_offsets.vrsave_offset = 520;
+ }
+}
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