/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
- Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+ Free Software Foundation, 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 "inferior.h"
#include "objfiles.h"
#include "elf/common.h" /* for DT_PLTGOT value */
#include "elf-bfd.h"
-#include "elf.h" /* for PT_IA64_UNWIND value */
#include "dis-asm.h"
+#include "infcall.h"
+#include "osabi.h"
+#include "ia64-tdep.h"
+#include "cp-abi.h"
#ifdef HAVE_LIBUNWIND_IA64_H
+#include "elf/ia64.h" /* for PT_IA_64_UNWIND value */
#include "libunwind-frame.h"
#include "libunwind-ia64.h"
-#endif
-/* Hook for determining the global pointer when calling functions in
- the inferior under AIX. The initialization code in ia64-aix-nat.c
- sets this hook to the address of a function which will find the
- global pointer for a given address.
-
- The generic code which uses the dynamic section in the inferior for
- finding the global pointer is not of much use on AIX since the
- values obtained from the inferior have not been relocated. */
+/* Note: KERNEL_START is supposed to be an address which is not going
+ to ever contain any valid unwind info. For ia64 linux, the choice
+ of 0xc000000000000000 is fairly safe since that's uncached space.
+
+ We use KERNEL_START as follows: after obtaining the kernel's
+ unwind table via getunwind(), we project its unwind data into
+ address-range KERNEL_START-(KERNEL_START+ktab_size) and then
+ when ia64_access_mem() sees a memory access to this
+ address-range, we redirect it to ktab instead.
+
+ None of this hackery is needed with a modern kernel/libcs
+ which uses the kernel virtual DSO to provide access to the
+ kernel's unwind info. In that case, ktab_size remains 0 and
+ hence the value of KERNEL_START doesn't matter. */
-CORE_ADDR (*native_find_global_pointer) (CORE_ADDR) = 0;
+#define KERNEL_START 0xc000000000000000ULL
+
+static size_t ktab_size = 0;
+struct ia64_table_entry
+ {
+ uint64_t start_offset;
+ uint64_t end_offset;
+ uint64_t info_offset;
+ };
+
+static struct ia64_table_entry *ktab = NULL;
+
+#endif
/* An enumeration of the different IA-64 instruction types. */
#define BUNDLE_LEN 16
-/* FIXME: These extern declarations should go in ia64-tdep.h. */
-extern CORE_ADDR ia64_linux_sigcontext_register_address (CORE_ADDR, int);
-extern CORE_ADDR ia64_aix_sigcontext_register_address (CORE_ADDR, int);
-extern unsigned long ia64_linux_getunwind_table (void *, size_t);
-
static gdbarch_init_ftype ia64_gdbarch_init;
static gdbarch_register_name_ftype ia64_register_name;
static gdbarch_register_type_ftype ia64_register_type;
static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc;
static gdbarch_skip_prologue_ftype ia64_skip_prologue;
-static gdbarch_extract_return_value_ftype ia64_extract_return_value;
-static gdbarch_use_struct_convention_ftype ia64_use_struct_convention;
static struct type *is_float_or_hfa_type (struct type *t);
+static CORE_ADDR ia64_find_global_pointer (CORE_ADDR faddr);
static struct type *builtin_type_ia64_ext;
};
-struct gdbarch_tdep
- {
- CORE_ADDR (*sigcontext_register_address) (CORE_ADDR, int);
- /* OS specific function which, given a frame address
- and register number, returns the offset to the
- given register from the start of the frame. */
- CORE_ADDR (*find_global_pointer) (CORE_ADDR);
- };
-
#define SIGCONTEXT_REGISTER_ADDRESS \
(gdbarch_tdep (current_gdbarch)->sigcontext_register_address)
-#define FIND_GLOBAL_POINTER \
- (gdbarch_tdep (current_gdbarch)->find_global_pointer)
int
ia64_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
}
static int
-floatformat_valid (const struct floatformat *fmt, const char *from)
+floatformat_valid (const struct floatformat *fmt, const void *from)
{
return 1;
}
at the assembly language level. */
if (slotnum > 2)
{
- warning ("Can't fetch instructions for slot numbers greater than 2.\n"
- "Using slot 0 instead");
+ warning (_("Can't fetch instructions for slot numbers greater than 2.\n"
+ "Using slot 0 instead"));
slotnum = 0;
}
#define IA64_BREAKPOINT 0x00003333300LL
static int
-ia64_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
+ia64_memory_insert_breakpoint (struct bp_target_info *bp_tgt)
{
+ CORE_ADDR addr = bp_tgt->placed_address;
char bundle[BUNDLE_LEN];
int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER;
long long instr;
int template;
if (slotnum > 2)
- error("Can't insert breakpoint for slot numbers greater than 2.");
+ error (_("Can't insert breakpoint for slot numbers greater than 2."));
addr &= ~0x0f;
}
instr = slotN_contents (bundle, slotnum);
- memcpy(contents_cache, &instr, sizeof(instr));
+ memcpy (bp_tgt->shadow_contents, &instr, sizeof (instr));
+ bp_tgt->placed_size = bp_tgt->shadow_len = sizeof (instr);
replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum);
if (val == 0)
target_write_memory (addr, bundle, BUNDLE_LEN);
}
static int
-ia64_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
+ia64_memory_remove_breakpoint (struct bp_target_info *bp_tgt)
{
+ CORE_ADDR addr = bp_tgt->placed_address;
char bundle[BUNDLE_LEN];
int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER;
long long instr;
slotnum = 2;
}
- memcpy (&instr, contents_cache, sizeof instr);
+ memcpy (&instr, bp_tgt->shadow_contents, sizeof instr);
replace_slotN_contents (bundle, instr, slotnum);
if (val == 0)
target_write_memory (addr, bundle, BUNDLE_LEN);
return pc_value | (slot_num * SLOT_MULTIPLIER);
}
-static void
+void
ia64_write_pc (CORE_ADDR new_pc, ptid_t ptid)
{
int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER;
static void
ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
- int regnum, void *buf)
+ int regnum, gdb_byte *buf)
{
if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
{
- ULONGEST bsp;
- ULONGEST cfm;
- CORE_ADDR reg;
- regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
- regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
-
- /* The bsp points at the end of the register frame so we
- subtract the size of frame from it to get start of register frame. */
- bsp = rse_address_add (bsp, -(cfm & 0x7f));
-
- if ((cfm & 0x7f) > regnum - V32_REGNUM)
+#ifdef HAVE_LIBUNWIND_IA64_H
+ /* First try and use the libunwind special reg accessor, otherwise fallback to
+ standard logic. */
+ if (!libunwind_is_initialized ()
+ || libunwind_get_reg_special (gdbarch, regnum, buf) != 0)
+#endif
{
- ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
- reg = read_memory_integer ((CORE_ADDR)reg_addr, 8);
- store_unsigned_integer (buf, register_size (current_gdbarch, regnum), reg);
+ /* The fallback position is to assume that r32-r127 are found sequentially
+ in memory starting at $bof. This isn't always true, but without libunwind,
+ this is the best we can do. */
+ ULONGEST cfm;
+ ULONGEST bsp;
+ CORE_ADDR reg;
+ regcache_cooked_read_unsigned (regcache, IA64_BSP_REGNUM, &bsp);
+ regcache_cooked_read_unsigned (regcache, IA64_CFM_REGNUM, &cfm);
+
+ /* The bsp points at the end of the register frame so we
+ subtract the size of frame from it to get start of register frame. */
+ bsp = rse_address_add (bsp, -(cfm & 0x7f));
+
+ if ((cfm & 0x7f) > regnum - V32_REGNUM)
+ {
+ ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
+ reg = read_memory_integer ((CORE_ADDR)reg_addr, 8);
+ store_unsigned_integer (buf, register_size (current_gdbarch, regnum), reg);
+ }
+ else
+ store_unsigned_integer (buf, register_size (current_gdbarch, regnum), 0);
}
- else
- store_unsigned_integer (buf, register_size (current_gdbarch, regnum), 0);
}
else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
{
static void
ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
- int regnum, const void *buf)
+ int regnum, const gdb_byte *buf)
{
if (regnum >= V32_REGNUM && regnum <= V127_REGNUM)
{
static void
ia64_register_to_value (struct frame_info *frame, int regnum,
- struct type *valtype, void *out)
+ struct type *valtype, gdb_byte *out)
{
char in[MAX_REGISTER_SIZE];
frame_register_read (frame, regnum, in);
static void
ia64_value_to_register (struct frame_info *frame, int regnum,
- struct type *valtype, const void *in)
+ struct type *valtype, const gdb_byte *in)
{
char out[MAX_REGISTER_SIZE];
convert_typed_floating (in, valtype, out, builtin_type_ia64_ext);
if (next_pc == 0)
break;
- if (it == B && ((instr & 0x1e1f800003f) != 0x04000000000))
+ if (it == B && ((instr & 0x1e1f800003fLL) != 0x04000000000LL))
{
/* Exit loop upon hitting a non-nop branch instruction. */
if (trust_limit)
{
cache->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr;
- if ((instr & 0x1efc0000000) == 0x0eec0000000)
+ if ((instr & 0x1efc0000000LL) == 0x0eec0000000LL)
spill_addr += imm;
else
spill_addr = 0; /* last one; must be done */
struct ia64_frame_cache *cache =
ia64_frame_cache (next_frame, this_cache);
- /* This marks the outermost frame. */
+ /* If outermost frame, mark with null frame id. */
if (cache->base == 0)
- return;
-
- (*this_id) = frame_id_build_special (cache->base, cache->pc, cache->bsp);
+ (*this_id) = null_frame_id;
+ else
+ (*this_id) = frame_id_build_special (cache->base, cache->pc, cache->bsp);
if (gdbarch_debug >= 1)
fprintf_unfiltered (gdb_stdlog,
"regular frame id: code 0x%s, stack 0x%s, special 0x%s, next_frame %p\n",
ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
struct ia64_frame_cache *cache =
ia64_frame_cache (next_frame, this_cache);
gdb_assert (regnum >= 0);
if (!target_has_registers)
- error ("No registers.");
+ error (_("No registers."));
*optimizedp = 0;
*addrp = 0;
void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
char dummy_valp[MAX_REGISTER_SIZE];
char buf[MAX_REGISTER_SIZE];
gdb_assert (regnum >= 0);
if (!target_has_registers)
- error ("No registers.");
+ error (_("No registers."));
*optimizedp = 0;
*addrp = 0;
if (gdbarch_debug >= 1)
fprintf_unfiltered (gdb_stdlog,
"sigtramp prev register <%s> is 0x%s\n",
- (((unsigned) regnum <= IA64_NAT127_REGNUM)
- ? ia64_register_names[regnum] : "r??"),
+ (regnum < IA64_GR32_REGNUM
+ || (regnum > IA64_GR127_REGNUM
+ && regnum < LAST_PSEUDO_REGNUM))
+ ? ia64_register_names[regnum]
+ : (regnum < LAST_PSEUDO_REGNUM
+ ? ia64_register_names[regnum-IA64_GR32_REGNUM+V32_REGNUM]
+ : "OUT_OF_RANGE"),
paddr_nz (extract_unsigned_integer (valuep, 8)));
}
CORE_ADDR pc = frame_pc_unwind (next_frame);
find_pc_partial_function (pc, &name, NULL, NULL);
- if (PC_IN_SIGTRAMP (pc, name))
+ if (legacy_pc_in_sigtramp (pc, name))
return &ia64_sigtramp_frame_unwind;
return NULL;
return 0;
}
+/* Libunwind callback accessor function for top-level rse registers. */
+static int
+ia64_access_rse_reg (unw_addr_space_t as, unw_regnum_t uw_regnum, unw_word_t *val,
+ int write, void *arg)
+{
+ int regnum = ia64_uw2gdb_regnum (uw_regnum);
+ unw_word_t bsp, sof, sol, cfm, psr, ip;
+ long new_sof, old_sof;
+
+ if (write)
+ {
+ if (regnum < 0)
+ /* ignore writes to pseudo-registers such as UNW_IA64_PROC_STARTI. */
+ return 0;
+
+ switch (uw_regnum)
+ {
+ case UNW_REG_IP:
+ ia64_write_pc (*val, inferior_ptid);
+ break;
+
+ case UNW_IA64_AR_BSPSTORE:
+ write_register (IA64_BSP_REGNUM, *val);
+ break;
+
+ case UNW_IA64_AR_BSP:
+ case UNW_IA64_BSP:
+ /* Account for the fact that ptrace() expects bsp to point
+ after the current register frame. */
+ cfm = read_register (IA64_CFM_REGNUM);
+ sof = (cfm & 0x7f);
+ bsp = ia64_rse_skip_regs (*val, sof);
+ write_register (IA64_BSP_REGNUM, bsp);
+ break;
+
+ case UNW_IA64_CFM:
+ /* If we change CFM, we need to adjust ptrace's notion of
+ bsp accordingly, so that the real bsp remains
+ unchanged. */
+ bsp = read_register (IA64_BSP_REGNUM);
+ cfm = read_register (IA64_CFM_REGNUM);
+ old_sof = (cfm & 0x7f);
+ new_sof = (*val & 0x7f);
+ if (old_sof != new_sof)
+ {
+ bsp = ia64_rse_skip_regs (bsp, -old_sof + new_sof);
+ write_register (IA64_BSP_REGNUM, bsp);
+ }
+ write_register (IA64_CFM_REGNUM, *val);
+ break;
+
+ default:
+ write_register (regnum, *val);
+ break;
+ }
+ if (gdbarch_debug >= 1)
+ fprintf_unfiltered (gdb_stdlog,
+ " access_rse_reg: to cache: %4s=0x%s\n",
+ (((unsigned) regnum <= IA64_NAT127_REGNUM)
+ ? ia64_register_names[regnum] : "r??"),
+ paddr_nz (*val));
+ }
+ else
+ {
+ switch (uw_regnum)
+ {
+ case UNW_REG_IP:
+ /* Libunwind expects to see the pc value which means the slot number
+ from the psr must be merged with the ip word address. */
+ ip = read_register (IA64_IP_REGNUM);
+ psr = read_register (IA64_PSR_REGNUM);
+ *val = ip | ((psr >> 41) & 0x3);
+ break;
+
+ case UNW_IA64_AR_BSP:
+ /* Libunwind expects to see the beginning of the current register
+ frame so we must account for the fact that ptrace() will return a value
+ for bsp that points *after* the current register frame. */
+ bsp = read_register (IA64_BSP_REGNUM);
+ cfm = read_register (IA64_CFM_REGNUM);
+ sof = (cfm & 0x7f);
+ *val = ia64_rse_skip_regs (bsp, -sof);
+ break;
+
+ case UNW_IA64_AR_BSPSTORE:
+ /* Libunwind wants bspstore to be after the current register frame.
+ This is what ptrace() and gdb treats as the regular bsp value. */
+ *val = read_register (IA64_BSP_REGNUM);
+ break;
+
+ default:
+ /* For all other registers, just read the value directly. */
+ *val = read_register (regnum);
+ break;
+ }
+ }
+
+ if (gdbarch_debug >= 1)
+ fprintf_unfiltered (gdb_stdlog,
+ " access_rse_reg: from cache: %4s=0x%s\n",
+ (((unsigned) regnum <= IA64_NAT127_REGNUM)
+ ? ia64_register_names[regnum] : "r??"),
+ paddr_nz (*val));
+
+ return 0;
+}
+
/* Libunwind callback accessor function for accessing memory. */
static int
ia64_access_mem (unw_addr_space_t as,
unw_word_t addr, unw_word_t *val,
int write, void *arg)
{
+ if (addr - KERNEL_START < ktab_size)
+ {
+ unw_word_t *laddr = (unw_word_t*) ((char *) ktab
+ + (addr - KERNEL_START));
+
+ if (write)
+ *laddr = *val;
+ else
+ *val = *laddr;
+ return 0;
+ }
+
/* XXX do we need to normalize byte-order here? */
if (write)
return target_write_memory (addr, (char *) val, sizeof (unw_word_t));
}
/* Call low-level function to access the kernel unwind table. */
-static int
-getunwind_table (void *buf, size_t len)
+static LONGEST
+getunwind_table (gdb_byte **buf_p)
{
LONGEST x;
- x = target_read_partial (¤t_target, TARGET_OBJECT_UNWIND_TABLE, NULL,
- buf, 0, len);
- return (int)x;
+ /* FIXME drow/2005-09-10: This code used to call
+ ia64_linux_xfer_unwind_table directly to fetch the unwind table
+ for the currently running ia64-linux kernel. That data should
+ come from the core file and be accessed via the auxv vector; if
+ we want to preserve fall back to the running kernel's table, then
+ we should find a way to override the corefile layer's
+ xfer_partial method. */
+
+ x = target_read_alloc (¤t_target, TARGET_OBJECT_UNWIND_TABLE,
+ NULL, buf_p);
+
+ return x;
}
-
+
/* Get the kernel unwind table. */
static int
get_kernel_table (unw_word_t ip, unw_dyn_info_t *di)
{
- size_t size;
- struct ia64_table_entry
- {
- uint64_t start_offset;
- uint64_t end_offset;
- uint64_t info_offset;
- };
- static struct ia64_table_entry *ktab = NULL, *etab;
+ static struct ia64_table_entry *etab;
- if (!ktab)
+ if (!ktab)
{
- size = getunwind_table (NULL, 0);
- if ((int)size < 0)
+ gdb_byte *ktab_buf;
+ LONGEST size;
+
+ size = getunwind_table (&ktab_buf);
+ if (size <= 0)
return -UNW_ENOINFO;
- ktab = xmalloc (size);
- getunwind_table (ktab, size);
-
- /* Determine length of kernel's unwind table and relocate
- it's entries. */
+
+ ktab = (struct ia64_table_entry *) ktab_buf;
+ ktab_size = size;
+
for (etab = ktab; etab->start_offset; ++etab)
- etab->info_offset += (uint64_t) ktab;
+ etab->info_offset += KERNEL_START;
}
if (ip < ktab[0].start_offset || ip >= etab[-1].end_offset)
}
}
- if (!p_text || !p_unwind
- /* Verify that the segment that contains the IP also contains
- the static unwind table. If not, we are dealing with
- runtime-generated code, for which we have no info here. */
- || (p_unwind->p_vaddr - p_text->p_vaddr) >= p_text->p_memsz)
+ if (!p_text || !p_unwind)
return -UNW_ENOINFO;
+ /* Verify that the segment that contains the IP also contains
+ the static unwind table. If not, we may be in the Linux kernel's
+ DSO gate page in which case the unwind table is another segment.
+ Otherwise, we are dealing with runtime-generated code, for which we
+ have no info here. */
segbase = p_text->p_vaddr + load_base;
- dip->start_ip = segbase;
+ if ((p_unwind->p_vaddr - p_text->p_vaddr) >= p_text->p_memsz)
+ {
+ int ok = 0;
+ for (i = 0; i < ehdr->e_phnum; ++i)
+ {
+ if (phdr[i].p_type == PT_LOAD
+ && (p_unwind->p_vaddr - phdr[i].p_vaddr) < phdr[i].p_memsz)
+ {
+ ok = 1;
+ /* Get the segbase from the section containing the
+ libunwind table. */
+ segbase = phdr[i].p_vaddr + load_base;
+ }
+ }
+ if (!ok)
+ return -UNW_ENOINFO;
+ }
+
+ dip->start_ip = p_text->p_vaddr + load_base;
dip->end_ip = dip->start_ip + p_text->p_memsz;
- dip->gp = FIND_GLOBAL_POINTER (ip);
+ dip->gp = ia64_find_global_pointer (ip);
dip->format = UNW_INFO_FORMAT_REMOTE_TABLE;
dip->u.rti.name_ptr = (unw_word_t) bfd_get_filename (bfd);
dip->u.rti.segbase = segbase;
static void
ia64_libunwind_frame_this_id (struct frame_info *next_frame, void **this_cache,
- struct frame_id *this_id)
+ struct frame_id *this_id)
{
char buf[8];
CORE_ADDR bsp;
struct frame_id id;
+ CORE_ADDR prev_ip, addr;
+ int realnum, optimized;
+ enum lval_type lval;
+
libunwind_frame_this_id (next_frame, this_cache, &id);
+ if (frame_id_eq (id, null_frame_id))
+ {
+ (*this_id) = null_frame_id;
+ return;
+ }
- /* We must add the bsp as the special address for frame comparison purposes. */
+ /* We must add the bsp as the special address for frame comparison
+ purposes. */
frame_unwind_register (next_frame, IA64_BSP_REGNUM, buf);
bsp = extract_unsigned_integer (buf, 8);
- (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
+ /* If the previous frame pc value is 0, then we are at the end of the stack
+ and don't want to unwind past this frame. We return a null frame_id to
+ indicate this. */
+ libunwind_frame_prev_register (next_frame, this_cache, IA64_IP_REGNUM,
+ &optimized, &lval, &addr, &realnum, buf);
+ prev_ip = extract_unsigned_integer (buf, 8);
+
+ if (prev_ip != 0)
+ (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
+ else
+ (*this_id) = null_frame_id;
if (gdbarch_debug >= 1)
fprintf_unfiltered (gdb_stdlog,
void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
int reg = regnum;
libunwind_frame_prev_register (next_frame, this_cache, reg,
optimizedp, lvalp, addrp, realnump, valuep);
+ /* No more to do if the value is not supposed to be supplied. */
+ if (!valuep)
+ return;
+
if (VP0_REGNUM <= regnum && regnum <= VP63_REGNUM)
{
ULONGEST prN_val;
if (gdbarch_debug >= 1)
fprintf_unfiltered (gdb_stdlog,
"libunwind prev register <%s> is 0x%s\n",
- (((unsigned) regnum <= IA64_NAT127_REGNUM)
- ? ia64_register_names[regnum] : "r??"),
+ (regnum < IA64_GR32_REGNUM
+ || (regnum > IA64_GR127_REGNUM
+ && regnum < LAST_PSEUDO_REGNUM))
+ ? ia64_register_names[regnum]
+ : (regnum < LAST_PSEUDO_REGNUM
+ ? ia64_register_names[regnum-IA64_GR32_REGNUM+V32_REGNUM]
+ : "OUT_OF_RANGE"),
paddr_nz (extract_unsigned_integer (valuep, 8)));
}
return NULL;
}
+static void
+ia64_libunwind_sigtramp_frame_this_id (struct frame_info *next_frame, void **this_cache,
+ struct frame_id *this_id)
+{
+ char buf[8];
+ CORE_ADDR bsp;
+ struct frame_id id;
+ CORE_ADDR prev_ip;
+
+ libunwind_frame_this_id (next_frame, this_cache, &id);
+ if (frame_id_eq (id, null_frame_id))
+ {
+ (*this_id) = null_frame_id;
+ return;
+ }
+
+ /* We must add the bsp as the special address for frame comparison
+ purposes. */
+ frame_unwind_register (next_frame, IA64_BSP_REGNUM, buf);
+ bsp = extract_unsigned_integer (buf, 8);
+
+ /* For a sigtramp frame, we don't make the check for previous ip being 0. */
+ (*this_id) = frame_id_build_special (id.stack_addr, id.code_addr, bsp);
+
+ if (gdbarch_debug >= 1)
+ fprintf_unfiltered (gdb_stdlog,
+ "libunwind sigtramp frame id: code 0x%s, stack 0x%s, special 0x%s, next_frame %p\n",
+ paddr_nz (id.code_addr), paddr_nz (id.stack_addr),
+ paddr_nz (bsp), next_frame);
+}
+
+static void
+ia64_libunwind_sigtramp_frame_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, gdb_byte *valuep)
+
+{
+ gdb_byte buf[8];
+ CORE_ADDR prev_ip, addr;
+ int realnum, optimized;
+ enum lval_type lval;
+
+
+ /* If the previous frame pc value is 0, then we want to use the SIGCONTEXT
+ method of getting previous registers. */
+ libunwind_frame_prev_register (next_frame, this_cache, IA64_IP_REGNUM,
+ &optimized, &lval, &addr, &realnum, buf);
+ prev_ip = extract_unsigned_integer (buf, 8);
+
+ if (prev_ip == 0)
+ {
+ void *tmp_cache = NULL;
+ ia64_sigtramp_frame_prev_register (next_frame, &tmp_cache, regnum, optimizedp, lvalp,
+ addrp, realnump, valuep);
+ }
+ else
+ ia64_libunwind_frame_prev_register (next_frame, this_cache, regnum, optimizedp, lvalp,
+ addrp, realnump, valuep);
+}
+
+static const struct frame_unwind ia64_libunwind_sigtramp_frame_unwind =
+{
+ SIGTRAMP_FRAME,
+ ia64_libunwind_sigtramp_frame_this_id,
+ ia64_libunwind_sigtramp_frame_prev_register
+};
+
+static const struct frame_unwind *
+ia64_libunwind_sigtramp_frame_sniffer (struct frame_info *next_frame)
+{
+ if (libunwind_is_initialized ())
+ {
+ if (libunwind_sigtramp_frame_sniffer (next_frame))
+ return &ia64_libunwind_sigtramp_frame_unwind;
+ return NULL;
+ }
+ else
+ return ia64_sigtramp_frame_sniffer (next_frame);
+}
+
/* Set of libunwind callback acccessor functions. */
static unw_accessors_t ia64_unw_accessors =
{
/* get_proc_name */
};
+/* Set of special libunwind callback acccessor functions specific for accessing
+ the rse registers. At the top of the stack, we want libunwind to figure out
+ how to read r32 - r127. Though usually they are found sequentially in memory
+ starting from $bof, this is not always true. */
+static unw_accessors_t ia64_unw_rse_accessors =
+{
+ ia64_find_proc_info_x,
+ ia64_put_unwind_info,
+ ia64_get_dyn_info_list,
+ ia64_access_mem,
+ ia64_access_rse_reg,
+ ia64_access_fpreg,
+ /* resume */
+ /* get_proc_name */
+};
+
/* Set of ia64 gdb libunwind-frame callbacks and data for generic libunwind-frame code to use. */
static struct libunwind_descr ia64_libunwind_descr =
{
ia64_uw2gdb_regnum,
ia64_is_fpreg,
&ia64_unw_accessors,
+ &ia64_unw_rse_accessors,
};
#endif /* HAVE_LIBUNWIND_IA64_H */
}
void
-ia64_extract_return_value (struct type *type, struct regcache *regcache, void *valbuf)
+ia64_extract_return_value (struct type *type, struct regcache *regcache,
+ gdb_byte *valbuf)
{
struct type *float_elt_type;
CORE_ADDR
ia64_extract_struct_value_address (struct regcache *regcache)
{
- error ("ia64_extract_struct_value_address called and cannot get struct value address");
+ error (_("ia64_extract_struct_value_address called and cannot get struct value address"));
return 0;
}
d_un.d_ptr value is the global pointer. */
static CORE_ADDR
-generic_elf_find_global_pointer (CORE_ADDR faddr)
+ia64_find_global_pointer (CORE_ADDR faddr)
{
struct obj_section *faddr_sect;
fdesc = *fdaptr;
*fdaptr += 16;
- global_pointer = FIND_GLOBAL_POINTER (faddr);
+ global_pointer = ia64_find_global_pointer (faddr);
if (global_pointer == 0)
global_pointer = read_register (IA64_GR1_REGNUM);
if (s && strcmp (s->the_bfd_section->name, ".opd") == 0)
return read_memory_unsigned_integer (addr, 8);
+ /* There are also descriptors embedded in vtables. */
+ if (s)
+ {
+ struct minimal_symbol *minsym;
+
+ minsym = lookup_minimal_symbol_by_pc (addr);
+
+ if (minsym && is_vtable_name (SYMBOL_LINKAGE_NAME (minsym)))
+ return read_memory_unsigned_integer (addr, 8);
+ }
+
return addr;
}
}
static CORE_ADDR
-ia64_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr,
+ia64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr,
int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
int nslots, rseslots, memslots, slotnum, nfuncargs;
int floatreg;
CORE_ADDR bsp, cfm, pfs, new_bsp, funcdescaddr, pc, global_pointer;
+ CORE_ADDR func_addr = find_function_addr (function, NULL);
nslots = 0;
nfuncargs = 0;
for (argno = 0; argno < nargs; argno++)
{
arg = args[argno];
- type = check_typedef (VALUE_TYPE (arg));
+ type = check_typedef (value_type (arg));
len = TYPE_LENGTH (type);
if ((nslots & 1) && slot_alignment_is_next_even (type))
struct type *float_elt_type;
arg = args[argno];
- type = check_typedef (VALUE_TYPE (arg));
+ type = check_typedef (value_type (arg));
len = TYPE_LENGTH (type);
/* Special handling for function parameters. */
char val_buf[8];
store_unsigned_integer (val_buf, 8,
- find_func_descr (extract_unsigned_integer (VALUE_CONTENTS (arg), 8),
+ find_func_descr (extract_unsigned_integer (value_contents (arg), 8),
&funcdescaddr));
if (slotnum < rseslots)
write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
char val_buf[8];
memset (val_buf, 0, 8);
- memcpy (val_buf, VALUE_CONTENTS (arg) + argoffset, (len > 8) ? 8 : len);
+ memcpy (val_buf, value_contents (arg) + argoffset, (len > 8) ? 8 : len);
if (slotnum < rseslots)
write_memory (rse_address_add (bsp, slotnum), val_buf, 8);
while (len > 0 && floatreg < IA64_FR16_REGNUM)
{
char to[MAX_REGISTER_SIZE];
- convert_typed_floating (VALUE_CONTENTS (arg) + argoffset, float_elt_type,
+ convert_typed_floating (value_contents (arg) + argoffset, float_elt_type,
to, builtin_type_ia64_ext);
regcache_cooked_write (regcache, floatreg, (void *)to);
floatreg++;
regcache_cooked_write_unsigned (regcache, IA64_GR8_REGNUM, (ULONGEST)struct_addr);
}
- global_pointer = FIND_GLOBAL_POINTER (func_addr);
+ global_pointer = ia64_find_global_pointer (func_addr);
if (global_pointer != 0)
write_register (IA64_GR1_REGNUM, global_pointer);
}
static void
-ia64_store_return_value (struct type *type, struct regcache *regcache, const void *valbuf)
+ia64_store_return_value (struct type *type, struct regcache *regcache,
+ const gdb_byte *valbuf)
{
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
tdep = xmalloc (sizeof (struct gdbarch_tdep));
gdbarch = gdbarch_alloc (&info, tdep);
- /* Set the method of obtaining the sigcontext addresses at which
- registers are saved. The method of checking to see if
- native_find_global_pointer is nonzero to indicate that we're
- on AIX is kind of hokey, but I can't think of a better way
- to do it. */
- if (info.osabi == GDB_OSABI_LINUX)
- tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address;
- else if (native_find_global_pointer != 0)
- tdep->sigcontext_register_address = ia64_aix_sigcontext_register_address;
- else
- tdep->sigcontext_register_address = 0;
-
- /* We know that GNU/Linux won't have to resort to the
- native_find_global_pointer hackery. But that's the only one we
- know about so far, so if native_find_global_pointer is set to
- something non-zero, then use it. Otherwise fall back to using
- generic_elf_find_global_pointer. This arrangement should (in
- theory) allow us to cross debug GNU/Linux binaries from an AIX
- machine. */
- if (info.osabi == GDB_OSABI_LINUX)
- tdep->find_global_pointer = generic_elf_find_global_pointer;
- else if (native_find_global_pointer != 0)
- tdep->find_global_pointer = native_find_global_pointer;
- else
- tdep->find_global_pointer = generic_elf_find_global_pointer;
+ tdep->sigcontext_register_address = 0;
/* Define the ia64 floating-point format to gdb. */
builtin_type_ia64_ext =
set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue);
- set_gdbarch_use_struct_convention (gdbarch, ia64_use_struct_convention);
+ set_gdbarch_deprecated_use_struct_convention (gdbarch, ia64_use_struct_convention);
set_gdbarch_extract_return_value (gdbarch, ia64_extract_return_value);
set_gdbarch_store_return_value (gdbarch, ia64_store_return_value);
set_gdbarch_unwind_dummy_id (gdbarch, ia64_unwind_dummy_id);
set_gdbarch_unwind_pc (gdbarch, ia64_unwind_pc);
- frame_unwind_append_sniffer (gdbarch, ia64_sigtramp_frame_sniffer);
#ifdef HAVE_LIBUNWIND_IA64_H
+ frame_unwind_append_sniffer (gdbarch, ia64_libunwind_sigtramp_frame_sniffer);
frame_unwind_append_sniffer (gdbarch, ia64_libunwind_frame_sniffer);
libunwind_frame_set_descr (gdbarch, &ia64_libunwind_descr);
+#else
+ frame_unwind_append_sniffer (gdbarch, ia64_sigtramp_frame_sniffer);
#endif
frame_unwind_append_sniffer (gdbarch, ia64_frame_sniffer);
frame_base_set_default (gdbarch, &ia64_frame_base);
set_gdbarch_print_insn (gdbarch, ia64_print_insn);
set_gdbarch_convert_from_func_ptr_addr (gdbarch, ia64_convert_from_func_ptr_addr);
+ /* The virtual table contains 16-byte descriptors, not pointers to
+ descriptors. */
+ set_gdbarch_vtable_function_descriptors (gdbarch, 1);
+
+ /* Hook in ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch);
+
return gdbarch;
}
void
_initialize_ia64_tdep (void)
{
- register_gdbarch_init (bfd_arch_ia64, ia64_gdbarch_init);
+ gdbarch_register (bfd_arch_ia64, ia64_gdbarch_init, NULL);
}
projects / deliverable / binutils-gdb.git / blobdiff