/* Target-dependent code for NetBSD/sparc.
- Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2006, 2007 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 "floatformat.h"
#include "frame.h"
#include "frame-unwind.h"
#include "gdbcore.h"
+#include "gdbtypes.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "sparc-tdep.h"
#include "nbsd-tdep.h"
+/* Macros to extract fields from SPARC instructions. */
+#define X_RS1(i) (((i) >> 14) & 0x1f)
+#define X_RS2(i) ((i) & 0x1f)
+#define X_I(i) (((i) >> 13) & 1)
+
const struct sparc_gregset sparc32nbsd_gregset =
{
0 * 4, /* %psr */
-1 /* %l0 */
};
-/* 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
sparc32nbsd_supply_gregset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *gregs, size_t len)
{
- sparc32_supply_gregset (regset->descr, regcache, regnum, gregs);
+ sparc32_supply_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs);
+
+ /* Traditional NetBSD core files don't use multiple register sets.
+ Instead, the general-purpose and floating-point registers are
+ lumped together in a single section. */
+ if (len >= 212)
+ sparc32_supply_fpregset (regcache, regnum, (const char *) gregs + 80);
}
static void
return nbsd_pc_in_sigtramp (pc, name);
}
-static struct sparc_frame_cache *
-sparc32nbsd_sigcontext_frame_cache (struct frame_info *next_frame,
- void **this_cache)
+struct trad_frame_saved_reg *
+sparc32nbsd_sigcontext_saved_regs (struct frame_info *next_frame)
{
- struct sparc_frame_cache *cache;
+ struct trad_frame_saved_reg *saved_regs;
CORE_ADDR addr, sigcontext_addr;
- LONGEST psr;
int regnum, delta;
+ ULONGEST psr;
- if (*this_cache)
- return *this_cache;
+ saved_regs = trad_frame_alloc_saved_regs (next_frame);
- cache = sparc_frame_cache (next_frame, this_cache);
- gdb_assert (cache == *this_cache);
+ /* We find the appropriate instance of `struct sigcontext' at a
+ fixed offset in the signal frame. */
+ addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
+ sigcontext_addr = addr + 64 + 16;
/* The registers are saved in bits and pieces scattered all over the
place. The code below records their location on the assumption
that the part of the signal trampoline that saves the state has
been executed. */
- /* If we couldn't find the frame's function, we're probably dealing
- with an on-stack signal trampoline. */
- if (cache->pc == 0)
- {
- cache->pc = sparc32nbsd_sigtramp_start;
-
- /* Since we couldn't find the frame's function, the cache was
- initialized under the assumption that we're frameless. */
- cache->frameless_p = 0;
- addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
- cache->base = addr;
- }
-
- cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
-
- /* We find the appropriate instance of `struct sigcontext' at a
- fixed offset in the signal frame. */
- sigcontext_addr = cache->base + 64 + 16;
-
- cache->saved_regs[SPARC_SP_REGNUM].addr = sigcontext_addr + 8;
- cache->saved_regs[SPARC32_PC_REGNUM].addr = sigcontext_addr + 12;
- cache->saved_regs[SPARC32_NPC_REGNUM].addr = sigcontext_addr + 16;
- cache->saved_regs[SPARC32_PSR_REGNUM].addr = sigcontext_addr + 20;
- cache->saved_regs[SPARC_G1_REGNUM].addr = sigcontext_addr + 24;
- cache->saved_regs[SPARC_O0_REGNUM].addr = sigcontext_addr + 28;
+ saved_regs[SPARC_SP_REGNUM].addr = sigcontext_addr + 8;
+ saved_regs[SPARC32_PC_REGNUM].addr = sigcontext_addr + 12;
+ saved_regs[SPARC32_NPC_REGNUM].addr = sigcontext_addr + 16;
+ saved_regs[SPARC32_PSR_REGNUM].addr = sigcontext_addr + 20;
+ saved_regs[SPARC_G1_REGNUM].addr = sigcontext_addr + 24;
+ saved_regs[SPARC_O0_REGNUM].addr = sigcontext_addr + 28;
/* The remaining `global' registers and %y are saved in the `local'
registers. */
delta = SPARC_L0_REGNUM - SPARC_G0_REGNUM;
for (regnum = SPARC_G2_REGNUM; regnum <= SPARC_G7_REGNUM; regnum++)
- cache->saved_regs[regnum].realreg = regnum + delta;
- cache->saved_regs[SPARC32_Y_REGNUM].realreg = SPARC_L1_REGNUM;
+ saved_regs[regnum].realreg = regnum + delta;
+ saved_regs[SPARC32_Y_REGNUM].realreg = SPARC_L1_REGNUM;
/* The remaining `out' registers can be found in the current frame's
`in' registers. */
delta = SPARC_I0_REGNUM - SPARC_O0_REGNUM;
for (regnum = SPARC_O1_REGNUM; regnum <= SPARC_O5_REGNUM; regnum++)
- cache->saved_regs[regnum].realreg = regnum + delta;
- cache->saved_regs[SPARC_O7_REGNUM].realreg = SPARC_I7_REGNUM;
+ saved_regs[regnum].realreg = regnum + delta;
+ saved_regs[SPARC_O7_REGNUM].realreg = SPARC_I7_REGNUM;
/* The `local' and `in' registers have been saved in the register
save area. */
- addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
+ addr = saved_regs[SPARC_SP_REGNUM].addr;
addr = get_frame_memory_unsigned (next_frame, addr, 4);
for (regnum = SPARC_L0_REGNUM;
regnum <= SPARC_I7_REGNUM; regnum++, addr += 4)
- cache->saved_regs[regnum].addr = addr;
+ saved_regs[regnum].addr = addr;
+
+ /* Handle StackGhost. */
+ {
+ ULONGEST wcookie = sparc_fetch_wcookie ();
+
+ if (wcookie != 0)
+ {
+ ULONGEST i7;
+
+ addr = saved_regs[SPARC_I7_REGNUM].addr;
+ i7 = get_frame_memory_unsigned (next_frame, addr, 4);
+ trad_frame_set_value (saved_regs, SPARC_I7_REGNUM, i7 ^ wcookie);
+ }
+ }
/* The floating-point registers are only saved if the EF bit in %prs
has been set. */
#define PSR_EF 0x00001000
- addr = cache->saved_regs[SPARC32_PSR_REGNUM].addr;
+ addr = saved_regs[SPARC32_PSR_REGNUM].addr;
psr = get_frame_memory_unsigned (next_frame, addr, 4);
if (psr & PSR_EF)
{
CORE_ADDR sp;
sp = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
- cache->saved_regs[SPARC32_FSR_REGNUM].addr = sp + 96;
+ saved_regs[SPARC32_FSR_REGNUM].addr = sp + 96;
for (regnum = SPARC_F0_REGNUM, addr = sp + 96 + 8;
regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
- cache->saved_regs[regnum].addr = addr;
+ saved_regs[regnum].addr = addr;
+ }
+
+ return saved_regs;
+}
+
+static struct sparc_frame_cache *
+sparc32nbsd_sigcontext_frame_cache (struct frame_info *next_frame,
+ void **this_cache)
+{
+ struct sparc_frame_cache *cache;
+ CORE_ADDR addr;
+
+ if (*this_cache)
+ return *this_cache;
+
+ cache = sparc_frame_cache (next_frame, this_cache);
+ gdb_assert (cache == *this_cache);
+
+ /* If we couldn't find the frame's function, we're probably dealing
+ with an on-stack signal trampoline. */
+ if (cache->pc == 0)
+ {
+ cache->pc = sparc32nbsd_sigtramp_start;
+
+ /* Since we couldn't find the frame's function, the cache was
+ initialized under the assumption that we're frameless. */
+ cache->frameless_p = 0;
+ addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
+ cache->base = addr;
}
+ cache->saved_regs = sparc32nbsd_sigcontext_saved_regs (next_frame);
+
return cache;
}
int regnum, int *optimizedp,
enum lval_type *lvalp,
CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
struct sparc_frame_cache *cache =
sparc32nbsd_sigcontext_frame_cache (next_frame, this_cache);
- trad_frame_prev_register (next_frame, cache->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
+ trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
}
static const struct frame_unwind sparc32nbsd_sigcontext_frame_unwind =
return NULL;
}
\f
+/* Return the address of a system call's alternative return
+ address. */
-/* Return non-zero if we are in a shared library trampoline code stub. */
-
-static int
-sparcnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
+CORE_ADDR
+sparcnbsd_step_trap (unsigned long insn)
{
- return (name && !strcmp (name, "_DYNAMIC"));
+ if ((X_I (insn) == 0 && X_RS1 (insn) == 0 && X_RS2 (insn) == 0)
+ || (X_I (insn) == 1 && X_RS1 (insn) == 0 && (insn & 0x7f) == 0))
+ {
+ /* "New" system call. */
+ ULONGEST number;
+
+ regcache_cooked_read_unsigned (current_regcache,
+ SPARC_G1_REGNUM, &number);
+
+ if (number & 0x400)
+ return sparc_address_from_register (SPARC_G2_REGNUM);
+ if (number & 0x800)
+ return sparc_address_from_register (SPARC_G7_REGNUM);
+ }
+
+ return 0;
}
+\f
static void
sparc32nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* NetBSD doesn't support the 128-bit `long double' from the psABI. */
set_gdbarch_long_double_bit (gdbarch, 64);
- set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
+ set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
+
+ tdep->gregset = regset_alloc (gdbarch, sparc32nbsd_supply_gregset, NULL);
+ tdep->sizeof_gregset = 20 * 4;
- tdep->gregset = XMALLOC (struct regset);
- tdep->gregset->descr = &sparc32nbsd_gregset;
- tdep->gregset->supply_regset = sparc32nbsd_supply_gregset;
+ tdep->fpregset = regset_alloc (gdbarch, sparc32nbsd_supply_fpregset, NULL);
+ tdep->sizeof_fpregset = 33 * 4;
- tdep->fpregset = XMALLOC (struct regset);
- tdep->fpregset->supply_regset = sparc32nbsd_supply_fpregset;
+ /* Make sure we can single-step "new" syscalls. */
+ tdep->step_trap = sparcnbsd_step_trap;
- set_gdbarch_pc_in_sigtramp (gdbarch, sparc32nbsd_pc_in_sigtramp);
frame_unwind_append_sniffer (gdbarch, sparc32nbsd_sigtramp_frame_sniffer);
}
sparc32nbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
sparc32nbsd_init_abi (info, gdbarch);
-
- set_gdbarch_in_solib_call_trampoline
- (gdbarch, sparcnbsd_aout_in_solib_call_trampoline);
}
-static void
+void
sparc32nbsd_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
sparc32nbsd_init_abi (info, gdbarch);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
static enum gdb_osabi
gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_aout_flavour,
sparcnbsd_aout_osabi_sniffer);
- /* BFD doesn't set the architecture for NetBSD style a.out core
- files. */
- gdbarch_register_osabi_sniffer (bfd_arch_unknown, bfd_target_unknown_flavour,
+ /* BFD doesn't set a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_unknown_flavour,
sparcnbsd_core_osabi_sniffer);
gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_AOUT,
sparc32nbsd_aout_init_abi);
gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_ELF,
sparc32nbsd_elf_init_abi);
- gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_OPENBSD_ELF,
- sparc32nbsd_elf_init_abi);
}
projects / deliverable / binutils-gdb.git / blobdiff