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binutils-gdb/gdb/sparcnbsd-tdep.c

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/* Target-dependent code for SPARC systems running NetBSD.
Copyright 2002, 2003 Free Software Foundation, Inc.
Contributed by Wasabi Systems, 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 "gdbcore.h"
#include "regcache.h"
#include "target.h"
#include "value.h"
#include "osabi.h"
#include "gdb_string.h"
#include "sparcnbsd-tdep.h"
#include "nbsd-tdep.h"
#include "solib-svr4.h"
#define REG32_OFFSET_PSR (0 * 4)
#define REG32_OFFSET_PC (1 * 4)
#define REG32_OFFSET_NPC (2 * 4)
#define REG32_OFFSET_Y (3 * 4)
#define REG32_OFFSET_GLOBAL (4 * 4)
#define REG32_OFFSET_OUT (12 * 4)
#define REG64_OFFSET_TSTATE (0 * 8)
#define REG64_OFFSET_PC (1 * 8)
#define REG64_OFFSET_NPC (2 * 8)
#define REG64_OFFSET_Y (3 * 8)
#define REG64_OFFSET_GLOBAL (4 * 8)
#define REG64_OFFSET_OUT (12 * 8)
void
sparcnbsd_supply_reg32 (char *regs, int regno)
{
int i;
if (regno == PS_REGNUM || regno == -1)
supply_register (PS_REGNUM, regs + REG32_OFFSET_PSR);
if (regno == PC_REGNUM || regno == -1)
supply_register (PC_REGNUM, regs + REG32_OFFSET_PC);
if (regno == NPC_REGNUM || regno == -1)
supply_register (NPC_REGNUM, regs + REG32_OFFSET_NPC);
if (regno == Y_REGNUM || regno == -1)
supply_register (Y_REGNUM, regs + REG32_OFFSET_Y);
if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1)
{
if (regno == G0_REGNUM || regno == -1)
supply_register (G0_REGNUM, NULL); /* %g0 is always zero */
for (i = G1_REGNUM; i <= G7_REGNUM; i++)
{
if (regno == i || regno == -1)
supply_register (i, regs + REG32_OFFSET_GLOBAL +
((i - G0_REGNUM) * 4));
}
}
if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1)
{
for (i = O0_REGNUM; i <= O7_REGNUM; i++)
{
if (regno == i || regno == -1)
supply_register (i, regs + REG32_OFFSET_OUT +
((i - O0_REGNUM) * 4));
}
}
/* Inputs and Locals are stored onto the stack by by the kernel. */
if ((regno >= L0_REGNUM && regno <= I7_REGNUM) || regno == -1)
{
CORE_ADDR sp = read_register (SP_REGNUM);
char buf[4];
for (i = L0_REGNUM; i <= I7_REGNUM; i++)
{
if (regno == i || regno == -1)
{
target_read_memory (sp + ((i - L0_REGNUM) * 4),
buf, sizeof (buf));
supply_register (i, buf);
}
}
}
/* FIXME: If we don't set these valid, read_register_bytes() rereads
all the regs every time it is called! */
if (regno == WIM_REGNUM || regno == -1)
supply_register (WIM_REGNUM, NULL);
if (regno == TBR_REGNUM || regno == -1)
supply_register (TBR_REGNUM, NULL);
if (regno == CPS_REGNUM || regno == -1)
supply_register (CPS_REGNUM, NULL);
}
void
sparcnbsd_supply_reg64 (char *regs, int regno)
{
int i;
char buf[8];
if (regno == TSTATE_REGNUM || regno == -1)
supply_register (PS_REGNUM, regs + REG64_OFFSET_TSTATE);
if (regno == PC_REGNUM || regno == -1)
supply_register (PC_REGNUM, regs + REG64_OFFSET_PC);
if (regno == NPC_REGNUM || regno == -1)
supply_register (NPC_REGNUM, regs + REG64_OFFSET_NPC);
if (regno == Y_REGNUM || regno == -1)
{
memset (buf, 0, sizeof (buf));
memcpy (&buf[4], regs + REG64_OFFSET_Y, 4);
supply_register (Y_REGNUM, buf);
}
if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1)
{
if (regno == G0_REGNUM || regno == -1)
supply_register (G0_REGNUM, NULL); /* %g0 is always zero */
for (i = G1_REGNUM; i <= G7_REGNUM; i++)
{
if (regno == i || regno == -1)
supply_register (i, regs + REG64_OFFSET_GLOBAL +
((i - G0_REGNUM) * 8));
}
}
if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1)
{
for (i = O0_REGNUM; i <= O7_REGNUM; i++)
{
if (regno == i || regno == -1)
supply_register (i, regs + REG64_OFFSET_OUT +
((i - O0_REGNUM) * 8));
}
}
/* Inputs and Locals are stored onto the stack by by the kernel. */
if ((regno >= L0_REGNUM && regno <= I7_REGNUM) || regno == -1)
{
CORE_ADDR sp = read_register (SP_REGNUM);
char buf[8];
if (sp & 1)
{
/* Registers are 64-bit. */
sp += 2047;
for (i = L0_REGNUM; i <= I7_REGNUM; i++)
{
if (regno == i || regno == -1)
{
target_read_memory (sp + ((i - L0_REGNUM) * 8),
buf, sizeof (buf));
supply_register (i, buf);
}
}
}
else
{
/* Registers are 32-bit. Toss any sign-extension of the stack
pointer, clear out the top half of the temporary buffer, and
put the register value in the bottom half. */
sp &= 0xffffffffUL;
memset (buf, 0, sizeof (buf));
for (i = L0_REGNUM; i <= I7_REGNUM; i++)
{
if (regno == i || regno == -1)
{
target_read_memory (sp + ((i - L0_REGNUM) * 4),
&buf[4], sizeof (buf));
supply_register (i, buf);
}
}
}
}
/* FIXME: If we don't set these valid, read_register_bytes() rereads
all the regs every time it is called! */
if (regno == WIM_REGNUM || regno == -1)
supply_register (WIM_REGNUM, NULL);
if (regno == TBR_REGNUM || regno == -1)
supply_register (TBR_REGNUM, NULL);
if (regno == CPS_REGNUM || regno == -1)
supply_register (CPS_REGNUM, NULL);
}
void
sparcnbsd_fill_reg32 (char *regs, int regno)
{
int i;
if (regno == PS_REGNUM || regno == -1)
regcache_collect (PS_REGNUM, regs + REG32_OFFSET_PSR);
if (regno == PC_REGNUM || regno == -1)
regcache_collect (PC_REGNUM, regs + REG32_OFFSET_PC);
if (regno == NPC_REGNUM || regno == -1)
regcache_collect (NPC_REGNUM, regs + REG32_OFFSET_NPC);
if (regno == Y_REGNUM || regno == -1)
regcache_collect (Y_REGNUM, regs + REG32_OFFSET_Y);
if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1)
{
/* %g0 is always zero */
for (i = G1_REGNUM; i <= G7_REGNUM; i++)
{
if (regno == i || regno == -1)
regcache_collect (i, regs + REG32_OFFSET_GLOBAL +
((i - G0_REGNUM) * 4));
}
}
if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1)
{
for (i = O0_REGNUM; i <= O7_REGNUM; i++)
{
if (regno == i || regno == -1)
regcache_collect (i, regs + REG32_OFFSET_OUT +
((i - O0_REGNUM) * 4));
}
}
/* Responsibility for the stack regs is pushed off onto the caller. */
}
void
sparcnbsd_fill_reg64 (char *regs, int regno)
{
int i;
if (regno == TSTATE_REGNUM || regno == -1)
regcache_collect (TSTATE_REGNUM, regs + REG64_OFFSET_TSTATE);
if (regno == PC_REGNUM || regno == -1)
regcache_collect (PC_REGNUM, regs + REG64_OFFSET_PC);
if (regno == NPC_REGNUM || regno == -1)
regcache_collect (NPC_REGNUM, regs + REG64_OFFSET_NPC);
if (regno == Y_REGNUM || regno == -1)
regcache_collect (Y_REGNUM, regs + REG64_OFFSET_Y);
if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1)
{
/* %g0 is always zero */
for (i = G1_REGNUM; i <= G7_REGNUM; i++)
{
if (regno == i || regno == -1)
regcache_collect (i, regs + REG64_OFFSET_GLOBAL +
((i - G0_REGNUM) * 4));
}
}
if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1)
{
for (i = O0_REGNUM; i <= O7_REGNUM; i++)
{
if (regno == i || regno == -1)
regcache_collect (i, regs + REG64_OFFSET_OUT +
((i - O0_REGNUM) * 4));
}
}
/* Responsibility for the stack regs is pushed off onto the caller. */
}
void
sparcnbsd_supply_fpreg32 (char *fpregs, int regno)
{
int i;
for (i = 0; i <= 31; i++)
{
if (regno == (FP0_REGNUM + i) || regno == -1)
supply_register (FP0_REGNUM + i, fpregs + (i * 4));
}
if (regno == FPS_REGNUM || regno == -1)
supply_register (FPS_REGNUM, fpregs + (32 * 4));
}
void
sparcnbsd_supply_fpreg64 (char *fpregs, int regno)
{
int i;
for (i = 0; i <= 31; i++)
{
if (regno == (FP0_REGNUM + i) || regno == -1)
supply_register (FP0_REGNUM + i, fpregs + (i * 4));
}
for (; i <= 47; i++)
{
if (regno == (FP0_REGNUM + i) || regno == -1)
supply_register (FP0_REGNUM + i, fpregs + (32 * 4) + (i * 8));
}
if (regno == FPS_REGNUM || regno == -1)
supply_register (FPS_REGNUM, fpregs + (32 * 4) + (16 * 8));
/* XXX %gsr */
}
void
sparcnbsd_fill_fpreg32 (char *fpregs, int regno)
{
int i;
for (i = 0; i <= 31; i++)
{
if (regno == (FP0_REGNUM + i) || regno == -1)
regcache_collect (FP0_REGNUM + i, fpregs + (i * 4));
}
if (regno == FPS_REGNUM || regno == -1)
regcache_collect (FPS_REGNUM, fpregs + (32 * 4));
}
void
sparcnbsd_fill_fpreg64 (char *fpregs, int regno)
{
int i;
for (i = 0; i <= 31; i++)
{
if (regno == (FP0_REGNUM + i) || regno == -1)
regcache_collect (FP0_REGNUM + i, fpregs + (i * 4));
}
for (; i <= 47; i++)
{
if (regno == (FP0_REGNUM + i) || regno == -1)
regcache_collect (FP0_REGNUM + i, fpregs + (32 * 4) + (i * 8));
}
if (regno == FPS_REGNUM || regno == -1)
regcache_collect (FPS_REGNUM, fpregs + (32 * 4) + (16 * 8));
/* XXX %gsr */
}
/* Unlike other NetBSD implementations, the SPARC port historically used
.reg and .reg2 (see bfd/netbsd-core.c), and as such, we can share one
routine for a.out and ELF core files. */
static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
CORE_ADDR ignore)
{
int reg_size, fpreg_size;
if (gdbarch_ptr_bit (current_gdbarch) == 32)
{
reg_size = (20 * 4);
fpreg_size = (33 * 4);
}
else
{
reg_size = (20 * 8);
fpreg_size = (64 * 4)
+ 8 /* fsr */
+ 4 /* gsr */
+ 4; /* pad */
}
switch (which)
{
case 0: /* Integer registers */
if (core_reg_size != reg_size)
warning ("Wrong size register set in core file.");
else if (gdbarch_ptr_bit (current_gdbarch) == 32)
sparcnbsd_supply_reg32 (core_reg_sect, -1);
else
sparcnbsd_supply_reg64 (core_reg_sect, -1);
break;
case 2: /* Floating pointer registers */
if (core_reg_size != fpreg_size)
warning ("Wrong size FP register set in core file.");
else if (gdbarch_ptr_bit (current_gdbarch) == 32)
sparcnbsd_supply_fpreg32 (core_reg_sect, -1);
else
sparcnbsd_supply_fpreg64 (core_reg_sect, -1);
break;
default:
/* Don't know what kind of register request this is; just ignore it. */
break;
}
}
static struct core_fns sparcnbsd_core_fns =
{
bfd_target_unknown_flavour, /* core_flavour */
default_check_format, /* check_format */
default_core_sniffer, /* core_sniffer */
fetch_core_registers, /* core_read_registers */
NULL
};
static struct core_fns sparcnbsd_elfcore_fns =
{
bfd_target_elf_flavour, /* core_flavour */
default_check_format, /* check_format */
default_core_sniffer, /* core_sniffer */
fetch_core_registers, /* core_read_registers */
NULL
};
/* FIXME: Need PC_IN_SIGTRAMP() support, but NetBSD/sparc signal trampolines
aren't easily identified. */
static int
sparcnbsd_get_longjmp_target_32 (CORE_ADDR *pc)
{
CORE_ADDR jb_addr;
char buf[4];
jb_addr = read_register (O0_REGNUM);
if (target_read_memory (jb_addr + 12, buf, sizeof (buf)))
return 0;
*pc = extract_unsigned_integer (buf, sizeof (buf));
return 1;
}
static int
sparcnbsd_get_longjmp_target_64 (CORE_ADDR *pc)
{
CORE_ADDR jb_addr;
char buf[8];
jb_addr = read_register (O0_REGNUM);
if (target_read_memory (jb_addr + 16, buf, sizeof (buf)))
return 0;
*pc = extract_unsigned_integer (buf, sizeof (buf));
return 1;
}
static int
sparcnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
{
if (strcmp (name, "_DYNAMIC") == 0)
return 1;
return 0;
}
static void
sparcnbsd_init_abi_common (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
set_gdbarch_get_longjmp_target (gdbarch, gdbarch_ptr_bit (gdbarch) == 32 ?
sparcnbsd_get_longjmp_target_32 :
sparcnbsd_get_longjmp_target_64);
}
static void
sparcnbsd_init_abi_aout (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
sparcnbsd_init_abi_common (info, gdbarch);
set_gdbarch_in_solib_call_trampoline (gdbarch,
sparcnbsd_aout_in_solib_call_trampoline);
}
static void
sparcnbsd_init_abi_elf (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
sparcnbsd_init_abi_common (info, gdbarch);
set_gdbarch_pc_in_sigtramp (gdbarch, nbsd_pc_in_sigtramp);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
gdbarch_ptr_bit (gdbarch) == 32 ?
nbsd_ilp32_solib_svr4_fetch_link_map_offsets :
nbsd_lp64_solib_svr4_fetch_link_map_offsets);
}
static enum gdb_osabi
sparcnbsd_aout_osabi_sniffer (bfd *abfd)
{
if (strcmp (bfd_get_target (abfd), "a.out-sparc-netbsd") == 0)
return GDB_OSABI_NETBSD_AOUT;
return GDB_OSABI_UNKNOWN;
}
void
_initialize_sparnbsd_tdep (void)
{
gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_aout_flavour,
sparcnbsd_aout_osabi_sniffer);
gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_AOUT,
sparcnbsd_init_abi_aout);
gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_ELF,
sparcnbsd_init_abi_elf);
add_core_fns (&sparcnbsd_core_fns);
add_core_fns (&sparcnbsd_elfcore_fns);
}
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