--- /dev/null
+/* Native-dependent code for PowerPC's running FreeBSD, for GDB.
+
+ Copyright (C) 2013 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 3 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 <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "gdbcore.h"
+#include "inferior.h"
+#include "regcache.h"
+
+#include "gdb_assert.h"
+#include <stddef.h>
+#include <sys/types.h>
+#include <sys/procfs.h>
+#include <sys/ptrace.h>
+#include <sys/signal.h>
+#include <machine/frame.h>
+#include <machine/pcb.h>
+#include <machine/reg.h>
+
+#include "fbsd-nat.h"
+#include "gregset.h"
+#include "ppc-tdep.h"
+#include "ppcfbsd-tdep.h"
+#include "inf-ptrace.h"
+#include "bsd-kvm.h"
+
+/* Fill GDB's register array with the general-purpose register values
+ in *GREGSETP. */
+
+void
+supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
+{
+ const struct regset *regset = ppc_fbsd_gregset (sizeof (long));
+
+ ppc_supply_gregset (regset, regcache, -1, gregsetp, sizeof (*gregsetp));
+}
+
+/* Fill register REGNO (if a gpr) in *GREGSETP with the value in GDB's
+ register array. If REGNO is -1 do it for all registers. */
+
+void
+fill_gregset (const struct regcache *regcache,
+ gdb_gregset_t *gregsetp, int regno)
+{
+ const struct regset *regset = ppc_fbsd_gregset (sizeof (long));
+
+ if (regno == -1)
+ memset (gregsetp, 0, sizeof (*gregsetp));
+ ppc_collect_gregset (regset, regcache, regno, gregsetp, sizeof (*gregsetp));
+}
+
+/* Fill GDB's register array with the floating-point register values
+ in *FPREGSETP. */
+
+void
+supply_fpregset (struct regcache *regcache, const gdb_fpregset_t * fpregsetp)
+{
+ const struct regset *regset = ppc_fbsd_fpregset ();
+
+ ppc_supply_fpregset (regset, regcache, -1,
+ fpregsetp, sizeof (*fpregsetp));
+}
+
+/* Fill register REGNO in *FGREGSETP with the value in GDB's
+ register array. If REGNO is -1 do it for all registers. */
+
+void
+fill_fpregset (const struct regcache *regcache,
+ gdb_fpregset_t *fpregsetp, int regno)
+{
+ const struct regset *regset = ppc_fbsd_fpregset ();
+
+ ppc_collect_fpregset (regset, regcache, regno,
+ fpregsetp, sizeof (*fpregsetp));
+}
+
+/* Returns true if PT_GETFPREGS fetches this register. */
+
+static int
+getfpregs_supplies (struct gdbarch *gdbarch, int regno)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* FIXME: jimb/2004-05-05: Some PPC variants don't have floating
+ point registers. Traditionally, GDB's register set has still
+ listed the floating point registers for such machines, so this
+ code is harmless. However, the new E500 port actually omits the
+ floating point registers entirely from the register set --- they
+ don't even have register numbers assigned to them.
+
+ It's not clear to me how best to update this code, so this assert
+ will alert the first person to encounter the NetBSD/E500
+ combination to the problem. */
+
+ gdb_assert (ppc_floating_point_unit_p (gdbarch));
+
+ return ((regno >= tdep->ppc_fp0_regnum
+ && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
+ || regno == tdep->ppc_fpscr_regnum);
+}
+
+/* Fetch register REGNO from the child process. If REGNO is -1, do it
+ for all registers. */
+
+static void
+ppcfbsd_fetch_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
+{
+ gdb_gregset_t regs;
+
+ if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) ®s, 0) == -1)
+ perror_with_name (_("Couldn't get registers"));
+
+ supply_gregset (regcache, ®s);
+
+ if (regno == -1 || getfpregs_supplies (get_regcache_arch (regcache), regno))
+ {
+ const struct regset *fpregset = ppc_fbsd_fpregset ();
+ gdb_fpregset_t fpregs;
+
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't get FP registers"));
+
+ ppc_supply_fpregset (fpregset, regcache, regno, &fpregs, sizeof fpregs);
+ }
+}
+
+/* Store register REGNO back into the child process. If REGNO is -1,
+ do this for all registers. */
+
+static void
+ppcfbsd_store_inferior_registers (struct target_ops *ops,
+ struct regcache *regcache, int regno)
+{
+ gdb_gregset_t regs;
+
+ if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) ®s, 0) == -1)
+ perror_with_name (_("Couldn't get registers"));
+
+ fill_gregset (regcache, ®s, regno);
+
+ if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) ®s, 0) == -1)
+ perror_with_name (_("Couldn't write registers"));
+
+ if (regno == -1 || getfpregs_supplies (get_regcache_arch (regcache), regno))
+ {
+ gdb_fpregset_t fpregs;
+
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't get FP registers"));
+
+ fill_fpregset (regcache, &fpregs, regno);
+
+ if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't set FP registers"));
+ }
+}
+
+/* Architecture specific function that reconstructs the
+ register state from PCB (Process Control Block) and supplies it
+ to REGCACHE. */
+
+static int
+ppcfbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int i, regnum;
+
+ /* The stack pointer shouldn't be zero. */
+ if (pcb->pcb_sp == 0)
+ return 0;
+
+ regcache_raw_supply (regcache, gdbarch_sp_regnum (gdbarch), &pcb->pcb_sp);
+ regcache_raw_supply (regcache, tdep->ppc_cr_regnum, &pcb->pcb_cr);
+ regcache_raw_supply (regcache, tdep->ppc_lr_regnum, &pcb->pcb_lr);
+ for (i = 0, regnum = tdep->ppc_gp0_regnum + 14; i < 20; i++, regnum++)
+ regcache_raw_supply (regcache, regnum, &pcb->pcb_context[i]);
+
+ return 1;
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+
+void _initialize_ppcfbsd_nat (void);
+
+void
+_initialize_ppcfbsd_nat (void)
+{
+ struct target_ops *t;
+
+ /* Add in local overrides. */
+ t = inf_ptrace_target ();
+ t->to_fetch_registers = ppcfbsd_fetch_inferior_registers;
+ t->to_store_registers = ppcfbsd_store_inferior_registers;
+ t->to_pid_to_exec_file = fbsd_pid_to_exec_file;
+ t->to_find_memory_regions = fbsd_find_memory_regions;
+ t->to_make_corefile_notes = fbsd_make_corefile_notes;
+ add_target (t);
+
+ /* Support debugging kernel virtual memory images. */
+ bsd_kvm_add_target (ppcfbsd_supply_pcb);
+}
--- /dev/null
+/* Target-dependent code for PowerPC systems running FreeBSD.
+
+ Copyright (C) 2013 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 3 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 <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "arch-utils.h"
+#include "frame.h"
+#include "gdbcore.h"
+#include "frame-unwind.h"
+#include "gdbtypes.h"
+#include "osabi.h"
+#include "regcache.h"
+#include "regset.h"
+#include "symtab.h"
+#include "target.h"
+#include "trad-frame.h"
+
+#include "gdb_assert.h"
+#include "gdb_string.h"
+
+#include "ppc-tdep.h"
+#include "ppc64-tdep.h"
+#include "ppcfbsd-tdep.h"
+#include "solib-svr4.h"
+
+
+/* 32-bit regset descriptions. */
+
+static const struct ppc_reg_offsets ppc32_fbsd_reg_offsets =
+ {
+ /* General-purpose registers. */
+ /* .r0_offset = */ 0,
+ /* .gpr_size = */ 4,
+ /* .xr_size = */ 4,
+ /* .pc_offset = */ 144,
+ /* .ps_offset = */ -1,
+ /* .cr_offset = */ 132,
+ /* .lr_offset = */ 128,
+ /* .ctr_offset = */ 140,
+ /* .xer_offset = */ 136,
+ /* .mq_offset = */ -1,
+
+ /* Floating-point registers. */
+ /* .f0_offset = */ 0,
+ /* .fpscr_offset = */ 256,
+ /* .fpscr_size = */ 8,
+#ifdef NOTYET
+ /* AltiVec registers. */
+ /* .vr0_offset = */ 0,
+ /* .vscr_offset = */ 512 + 12,
+ /* .vrsave_offset = */ 512
+#endif
+ };
+
+/* 64-bit regset descriptions. */
+
+static const struct ppc_reg_offsets ppc64_fbsd_reg_offsets =
+ {
+ /* General-purpose registers. */
+ /* .r0_offset = */ 0,
+ /* .gpr_size = */ 8,
+ /* .xr_size = */ 8,
+ /* .pc_offset = */ 288,
+ /* .ps_offset = */ -1,
+ /* .cr_offset = */ 264,
+ /* .lr_offset = */ 256,
+ /* .ctr_offset = */ 280,
+ /* .xer_offset = */ 272,
+ /* .mq_offset = */ -1,
+
+ /* Floating-point registers. */
+ /* .f0_offset = */ 0,
+ /* .fpscr_offset = */ 256,
+ /* .fpscr_size = */ 8,
+#ifdef NOYET
+ /* AltiVec registers. */
+ /* .vr0_offset = */ 0,
+ /* .vscr_offset = */ 512 + 12,
+ /* .vrsave_offset = */ 528
+#endif
+ };
+
+/* 32-bit general-purpose register set. */
+
+static const struct regset ppc32_fbsd_gregset = {
+ &ppc32_fbsd_reg_offsets,
+ ppc_supply_gregset,
+ ppc_collect_gregset,
+ NULL
+};
+
+/* 64-bit general-purpose register set. */
+
+static const struct regset ppc64_fbsd_gregset = {
+ &ppc64_fbsd_reg_offsets,
+ ppc_supply_gregset,
+ ppc_collect_gregset,
+ NULL
+};
+
+/* 32-/64-bit floating-point register set. */
+
+static struct regset ppc32_fbsd_fpregset = {
+ &ppc32_fbsd_reg_offsets,
+ ppc_supply_fpregset,
+ ppc_collect_fpregset
+};
+
+const struct regset *
+ppc_fbsd_gregset (int wordsize)
+{
+ return wordsize == 8 ? &ppc64_fbsd_gregset : &ppc32_fbsd_gregset;
+}
+
+const struct regset *
+ppc_fbsd_fpregset (void)
+{
+ return &ppc32_fbsd_fpregset;
+}
+
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+
+static const struct regset *
+ppcfbsd_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ if (strcmp (sect_name, ".reg") == 0 && sect_size >= 148)
+ {
+ if (tdep->wordsize == 4)
+ return &ppc32_fbsd_gregset;
+ else
+ return &ppc64_fbsd_gregset;
+ }
+ if (strcmp (sect_name, ".reg2") == 0 && sect_size >= 264)
+ return &ppc32_fbsd_fpregset;
+ return NULL;
+}
+
+/* Default page size. */
+
+static const int ppcfbsd_page_size = 4096;
+
+/* Offset for sigreturn(2). */
+
+static const int ppcfbsd_sigreturn_offset[] = {
+ 0xc, /* FreeBSD 32-bit */
+ -1
+};
+
+/* Signal trampolines. */
+
+static int
+ppcfbsd_sigtramp_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_cache)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ CORE_ADDR pc = get_frame_pc (this_frame);
+ CORE_ADDR start_pc = (pc & ~(ppcfbsd_page_size - 1));
+ const int *offset;
+ const char *name;
+
+ /* A stack trampoline is detected if no name is associated
+ to the current pc and if it points inside a trampoline
+ sequence. */
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
+
+ /* If we have a name, we have no trampoline, return. */
+ if (name)
+ return 0;
+
+ for (offset = ppcfbsd_sigreturn_offset; *offset != -1; offset++)
+ {
+ gdb_byte buf[2 * PPC_INSN_SIZE];
+ unsigned long insn;
+
+ if (!safe_frame_unwind_memory (this_frame, start_pc + *offset,
+ buf, sizeof buf))
+ continue;
+
+ /* Check for "li r0,SYS_sigreturn". */
+ insn = extract_unsigned_integer (buf, PPC_INSN_SIZE, byte_order);
+ if (insn != 0x380001a1)
+ continue;
+
+ /* Check for "sc". */
+ insn = extract_unsigned_integer (buf + PPC_INSN_SIZE,
+ PPC_INSN_SIZE, byte_order);
+ if (insn != 0x44000002)
+ continue;
+
+ return 1;
+ }
+
+ return 0;
+}
+
+static struct trad_frame_cache *
+ppcfbsd_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ struct trad_frame_cache *cache;
+ CORE_ADDR addr, base, func;
+ gdb_byte buf[PPC_INSN_SIZE];
+ int i;
+
+ if (*this_cache)
+ return *this_cache;
+
+ cache = trad_frame_cache_zalloc (this_frame);
+ *this_cache = cache;
+
+ func = get_frame_pc (this_frame);
+ func &= ~(ppcfbsd_page_size - 1);
+ if (!safe_frame_unwind_memory (this_frame, func, buf, sizeof buf))
+ return cache;
+
+ base = get_frame_register_unsigned (this_frame, gdbarch_sp_regnum (gdbarch));
+ addr = base + 0x10 + 2 * tdep->wordsize;
+ for (i = 0; i < ppc_num_gprs; i++, addr += tdep->wordsize)
+ {
+ int regnum = i + tdep->ppc_gp0_regnum;
+ trad_frame_set_reg_addr (cache, regnum, addr);
+ }
+ trad_frame_set_reg_addr (cache, tdep->ppc_lr_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (cache, tdep->ppc_cr_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (cache, tdep->ppc_xer_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (cache, tdep->ppc_ctr_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (cache, gdbarch_pc_regnum (gdbarch), addr);
+ /* SRR0? */
+ addr += tdep->wordsize;
+
+ /* Construct the frame ID using the function start. */
+ trad_frame_set_id (cache, frame_id_build (base, func));
+
+ return cache;
+}
+
+static void
+ppcfbsd_sigtramp_frame_this_id (struct frame_info *this_frame,
+ void **this_cache, struct frame_id *this_id)
+{
+ struct trad_frame_cache *cache =
+ ppcfbsd_sigtramp_frame_cache (this_frame, this_cache);
+
+ trad_frame_get_id (cache, this_id);
+}
+
+static struct value *
+ppcfbsd_sigtramp_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
+{
+ struct trad_frame_cache *cache =
+ ppcfbsd_sigtramp_frame_cache (this_frame, this_cache);
+
+ return trad_frame_get_register (cache, this_frame, regnum);
+}
+
+static const struct frame_unwind ppcfbsd_sigtramp_frame_unwind = {
+ SIGTRAMP_FRAME,
+ default_frame_unwind_stop_reason,
+ ppcfbsd_sigtramp_frame_this_id,
+ ppcfbsd_sigtramp_frame_prev_register,
+ NULL,
+ ppcfbsd_sigtramp_frame_sniffer
+};
+
+static enum return_value_convention
+ppcfbsd_return_value (struct gdbarch *gdbarch, struct value *function,
+ struct type *valtype, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
+{
+ return ppc_sysv_abi_broken_return_value (gdbarch, function, valtype,
+ regcache, readbuf, writebuf);
+}
+
+
+static void
+ppcfbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* FreeBSD doesn't support the 128-bit `long double' from the psABI. */
+ set_gdbarch_long_double_bit (gdbarch, 64);
+ set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
+
+ if (tdep->wordsize == 4)
+ {
+ set_gdbarch_return_value (gdbarch, ppcfbsd_return_value);
+
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ svr4_ilp32_fetch_link_map_offsets);
+
+ frame_unwind_append_unwinder (gdbarch, &ppcfbsd_sigtramp_frame_unwind);
+ set_gdbarch_gcore_bfd_target (gdbarch, "elf32-powerpc");
+ }
+
+ if (tdep->wordsize == 8)
+ {
+ set_gdbarch_convert_from_func_ptr_addr
+ (gdbarch, ppc64_convert_from_func_ptr_addr);
+ set_gdbarch_skip_trampoline_code (gdbarch, ppc64_skip_trampoline_code);
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ svr4_lp64_fetch_link_map_offsets);
+ set_gdbarch_gcore_bfd_target (gdbarch, "elf64-powerpc");
+ }
+
+ set_gdbarch_regset_from_core_section
+ (gdbarch, ppcfbsd_regset_from_core_section);
+
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+
+void _initialize_ppcfbsd_tdep (void);
+
+void
+_initialize_ppcfbsd_tdep (void)
+{
+ gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc, GDB_OSABI_FREEBSD_ELF,
+ ppcfbsd_init_abi);
+ gdbarch_register_osabi (bfd_arch_powerpc, bfd_mach_ppc64,
+ GDB_OSABI_FREEBSD_ELF,
+ ppcfbsd_init_abi);
+ gdbarch_register_osabi (bfd_arch_rs6000, 0, GDB_OSABI_FREEBSD_ELF,
+ ppcfbsd_init_abi);
+}
projects / binutils-gdb.git / commitdiff