-/* Target-dependent code for PowerPC systems running NetBSD.
- Copyright 2002 Free Software Foundation, Inc.
+/* Target-dependent code for NetBSD/powerpc.
+
+ Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+
Contributed by Wasabi Systems, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
-#include "gdbcore.h"
+#include "gdbtypes.h"
+#include "osabi.h"
#include "regcache.h"
-#include "target.h"
-#include "breakpoint.h"
-#include "value.h"
+#include "regset.h"
+#include "trad-frame.h"
+#include "tramp-frame.h"
+
+#include "gdb_assert.h"
+#include "gdb_string.h"
#include "ppc-tdep.h"
#include "ppcnbsd-tdep.h"
-#include "nbsd-tdep.h"
-
#include "solib-svr4.h"
-#define REG_FIXREG_OFFSET(x) ((x) * 4)
-#define REG_LR_OFFSET (32 * 4)
-#define REG_CR_OFFSET (33 * 4)
-#define REG_XER_OFFSET (34 * 4)
-#define REG_CTR_OFFSET (35 * 4)
-#define REG_PC_OFFSET (36 * 4)
-#define SIZEOF_STRUCT_REG (37 * 4)
-
-#define FPREG_FPR_OFFSET(x) ((x) * 8)
-#define FPREG_FPSCR_OFFSET (32 * 8)
-#define SIZEOF_STRUCT_FPREG (33 * 8)
-
-void
-ppcnbsd_supply_reg (char *regs, int regno)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- int i;
-
- for (i = 0; i <= 31; i++)
- {
- if (regno == i || regno == -1)
- supply_register (i, regs + REG_FIXREG_OFFSET (i));
- }
-
- if (regno == tdep->ppc_lr_regnum || regno == -1)
- supply_register (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET);
-
- if (regno == tdep->ppc_cr_regnum || regno == -1)
- supply_register (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET);
+/* Register offsets from <machine/reg.h>. */
+struct ppc_reg_offsets ppcnbsd_reg_offsets;
+\f
- if (regno == tdep->ppc_xer_regnum || regno == -1)
- supply_register (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET);
+/* Core file support. */
- if (regno == tdep->ppc_ctr_regnum || regno == -1)
- supply_register (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET);
+/* NetBSD/powerpc register set. */
- if (regno == PC_REGNUM || regno == -1)
- supply_register (PC_REGNUM, regs + REG_PC_OFFSET);
-}
-
-void
-ppcnbsd_fill_reg (char *regs, int regno)
+struct regset ppcnbsd_gregset =
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- int i;
-
- for (i = 0; i <= 31; i++)
- {
- if (regno == i || regno == -1)
- regcache_collect (i, regs + REG_FIXREG_OFFSET (i));
- }
-
- if (regno == tdep->ppc_lr_regnum || regno == -1)
- regcache_collect (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET);
-
- if (regno == tdep->ppc_cr_regnum || regno == -1)
- regcache_collect (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET);
-
- if (regno == tdep->ppc_xer_regnum || regno == -1)
- regcache_collect (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET);
-
- if (regno == tdep->ppc_ctr_regnum || regno == -1)
- regcache_collect (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET);
-
- if (regno == PC_REGNUM || regno == -1)
- regcache_collect (PC_REGNUM, regs + REG_PC_OFFSET);
-}
+ &ppcnbsd_reg_offsets,
+ ppc_supply_gregset
+};
-void
-ppcnbsd_supply_fpreg (char *fpregs, int regno)
+struct regset ppcnbsd_fpregset =
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- int i;
-
- for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
- {
- if (regno == i || regno == -1)
- supply_register (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM));
- }
+ &ppcnbsd_reg_offsets,
+ ppc_supply_fpregset
+};
- if (regno == tdep->ppc_fpscr_regnum || regno == -1)
- supply_register (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET);
-}
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
-void
-ppcnbsd_fill_fpreg (char *fpregs, int regno)
+static const struct regset *
+ppcnbsd_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- int i;
+ if (strcmp (sect_name, ".reg") == 0 && sect_size >= 148)
+ return &ppcnbsd_gregset;
- for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
- {
- if (regno == i || regno == -1)
- regcache_collect (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM));
- }
+ if (strcmp (sect_name, ".reg2") == 0 && sect_size >= 264)
+ return &ppcnbsd_fpregset;
- if (regno == tdep->ppc_fpscr_regnum || regno == -1)
- regcache_collect (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET);
+ return NULL;
}
+\f
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
-{
- char *regs, *fpregs;
+/* NetBSD is confused. It appears that 1.5 was using the correct SVR4
+ convention but, 1.6 switched to the below broken convention. For
+ the moment use the broken convention. Ulgh!. */
- /* We get everything from one section. */
- if (which != 0)
- return;
-
- regs = core_reg_sect;
- fpregs = core_reg_sect + SIZEOF_STRUCT_REG;
+static enum return_value_convention
+ppcnbsd_return_value (struct gdbarch *gdbarch, struct type *valtype,
+ struct regcache *regcache, gdb_byte *readbuf,
+ const gdb_byte *writebuf)
+{
+#if 0
+ if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT
+ || TYPE_CODE (valtype) == TYPE_CODE_UNION)
+ && !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8)
+ && TYPE_VECTOR (valtype))
+ && !(TYPE_LENGTH (valtype) == 1
+ || TYPE_LENGTH (valtype) == 2
+ || TYPE_LENGTH (valtype) == 4
+ || TYPE_LENGTH (valtype) == 8))
+ return RETURN_VALUE_STRUCT_CONVENTION;
+ else
+#endif
+ return ppc_sysv_abi_broken_return_value (gdbarch, valtype, regcache,
+ readbuf, writebuf);
+}
+\f
- /* Integer registers. */
- ppcnbsd_supply_reg (regs, -1);
+/* Signal trampolines. */
- /* Floating point registers. */
- ppcnbsd_supply_fpreg (fpregs, -1);
-}
+static const struct tramp_frame ppcnbsd2_sigtramp;
static void
-fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
+ppcnbsd_sigtramp_cache_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
{
- switch (which)
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ CORE_ADDR addr, base;
+ int i;
+
+ base = frame_unwind_register_unsigned (next_frame, SP_REGNUM);
+ if (self == &ppcnbsd2_sigtramp)
+ addr = base + 0x10 + 2 * tdep->wordsize;
+ else
+ addr = base + 0x18 + 2 * tdep->wordsize;
+ for (i = 0; i < ppc_num_gprs; i++, addr += tdep->wordsize)
{
- case 0: /* Integer registers. */
- if (core_reg_size != SIZEOF_STRUCT_REG)
- warning ("Wrong size register set in core file.");
- else
- ppcnbsd_supply_reg (core_reg_sect, -1);
- break;
-
- case 2: /* Floating point registers. */
- if (core_reg_size != SIZEOF_STRUCT_FPREG)
- warning ("Wrong size FP register set in core file.");
- else
- ppcnbsd_supply_fpreg (core_reg_sect, -1);
- break;
-
- default:
- /* Don't know what kind of register request this is; just ignore it. */
- break;
+ int regnum = i + tdep->ppc_gp0_regnum;
+ trad_frame_set_reg_addr (this_cache, regnum, addr);
}
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, PC_REGNUM, addr); /* SRR0? */
+ addr += tdep->wordsize;
+
+ /* Construct the frame ID using the function start. */
+ trad_frame_set_id (this_cache, frame_id_build (base, func));
}
-static struct core_fns ppcnbsd_core_fns =
+static const struct tramp_frame ppcnbsd_sigtramp =
{
- bfd_target_unknown_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x3821fff0, -1 }, /* add r1,r1,-16 */
+ { 0x4e800021, -1 }, /* blrl */
+ { 0x38610018, -1 }, /* addi r3,r1,24 */
+ { 0x38000127, -1 }, /* li r0,295 */
+ { 0x44000002, -1 }, /* sc */
+ { 0x38000001, -1 }, /* li r0,1 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ ppcnbsd_sigtramp_cache_init
};
-static struct core_fns ppcnbsd_elfcore_fns =
+/* NetBSD 2.0 introduced a slightly different signal trampoline. */
+
+static const struct tramp_frame ppcnbsd2_sigtramp =
{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_elfcore_registers, /* core_read_registers */
- NULL /* next */
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x3821fff0, -1 }, /* add r1,r1,-16 */
+ { 0x4e800021, -1 }, /* blrl */
+ { 0x38610010, -1 }, /* addi r3,r1,16 */
+ { 0x38000127, -1 }, /* li r0,295 */
+ { 0x44000002, -1 }, /* sc */
+ { 0x38000001, -1 }, /* li r0,1 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ ppcnbsd_sigtramp_cache_init
};
+\f
static void
ppcnbsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
- /* Until November 2001, gcc was not complying to the SYSV ABI for
- returning structures less than or equal to 8 bytes in size. It was
- returning everything in memory. When this was corrected, it wasn't
- fixed for native platforms. */
- set_gdbarch_use_struct_convention (gdbarch,
- ppc_sysv_abi_broken_use_struct_convention);
-
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
+ /* For NetBSD, this is an on again, off again thing. Some systems
+ do use the broken struct convention, and some don't. */
+ set_gdbarch_return_value (gdbarch, ppcnbsd_return_value);
+
+ /* NetBSD uses SVR4-style shared libraries. */
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ set_gdbarch_regset_from_core_section
+ (gdbarch, ppcnbsd_regset_from_core_section);
+
+ tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd_sigtramp);
+ tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd2_sigtramp);
}
+\f
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_ppcnbsd_tdep (void);
void
_initialize_ppcnbsd_tdep (void)
{
- gdbarch_register_osabi (bfd_arch_powerpc, GDB_OSABI_NETBSD_ELF,
+ gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_NETBSD_ELF,
ppcnbsd_init_abi);
- add_core_fns (&ppcnbsd_core_fns);
- add_core_fns (&ppcnbsd_elfcore_fns);
+ /* Avoid initializing the register offsets again if they were
+ already initailized by ppcnbsd-nat.c. */
+ if (ppcnbsd_reg_offsets.pc_offset == 0)
+ {
+ /* General-purpose registers. */
+ ppcnbsd_reg_offsets.r0_offset = 0;
+ ppcnbsd_reg_offsets.lr_offset = 128;
+ ppcnbsd_reg_offsets.cr_offset = 132;
+ ppcnbsd_reg_offsets.xer_offset = 136;
+ ppcnbsd_reg_offsets.ctr_offset = 140;
+ ppcnbsd_reg_offsets.pc_offset = 144;
+ ppcnbsd_reg_offsets.ps_offset = -1;
+ ppcnbsd_reg_offsets.mq_offset = -1;
+
+ /* Floating-point registers. */
+ ppcnbsd_reg_offsets.f0_offset = 0;
+ ppcnbsd_reg_offsets.fpscr_offset = 256;
+
+ /* AltiVec registers. */
+ ppcnbsd_reg_offsets.vr0_offset = 0;
+ ppcnbsd_reg_offsets.vrsave_offset = 512;
+ ppcnbsd_reg_offsets.vscr_offset = 524;
+ }
}
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