/* Target-dependent code for the ALPHA architecture, for GDB, the GNU Debugger.
- Copyright 1993, 1994 Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "frame.h"
#include "dis-asm.h"
#include "symfile.h"
#include "objfiles.h"
+#include "gdb_string.h"
/* FIXME: Some of this code should perhaps be merged with mips-tdep.c. */
CORE_ADDR,
struct frame_info *));
-static alpha_extra_func_info_t find_proc_desc PARAMS ((CORE_ADDR, struct frame_info *));
+static alpha_extra_func_info_t find_proc_desc PARAMS ((CORE_ADDR,
+ struct frame_info *));
+#if 0
static int alpha_in_lenient_prologue PARAMS ((CORE_ADDR, CORE_ADDR));
+#endif
-static void reinit_frame_cache_sfunc PARAMS ((char *, int, struct cmd_list_element *));
+static void reinit_frame_cache_sfunc PARAMS ((char *, int,
+ struct cmd_list_element *));
static CORE_ADDR after_prologue PARAMS ((CORE_ADDR pc,
alpha_extra_func_info_t proc_desc));
obstack_alloc (&frame_cache_obstack, sizeof(struct frame_saved_regs));
memset (frame->saved_regs, 0, sizeof (struct frame_saved_regs));
+ /* If it is the frame for __sigtramp, the saved registers are located
+ in a sigcontext structure somewhere on the stack. __sigtramp
+ passes a pointer to the sigcontext structure on the stack.
+ If the stack layout for __sigtramp changes, or if sigcontext offsets
+ change, we might have to update this code. */
+#ifndef SIGFRAME_PC_OFF
+#define SIGFRAME_PC_OFF (2 * 8)
+#define SIGFRAME_REGSAVE_OFF (4 * 8)
+#define SIGFRAME_FPREGSAVE_OFF (SIGFRAME_REGSAVE_OFF + 32 * 8 + 8)
+#endif
+ if (frame->signal_handler_caller)
+ {
+ CORE_ADDR sigcontext_pointer_addr;
+ CORE_ADDR sigcontext_addr;
+
+ if (frame->next)
+ sigcontext_pointer_addr = frame->next->frame;
+ else
+ sigcontext_pointer_addr = frame->frame;
+ sigcontext_addr = read_memory_integer(sigcontext_pointer_addr, 8);
+ for (ireg = 0; ireg < 32; ireg++)
+ {
+ reg_position = sigcontext_addr + SIGFRAME_REGSAVE_OFF + ireg * 8;
+ frame->saved_regs->regs[ireg] = reg_position;
+ }
+ for (ireg = 0; ireg < 32; ireg++)
+ {
+ reg_position = sigcontext_addr + SIGFRAME_FPREGSAVE_OFF + ireg * 8;
+ frame->saved_regs->regs[FP0_REGNUM + ireg] = reg_position;
+ }
+ frame->saved_regs->regs[PC_REGNUM] = sigcontext_addr + SIGFRAME_PC_OFF;
+ return;
+ }
+
proc_desc = frame->proc_desc;
if (proc_desc == NULL)
/* I'm not sure how/whether this can happen. Normally when we can't
returnreg = PROC_PC_REG (proc_desc);
- /* Note that RA is always saved first, regardless of it's actual
+ /* Note that RA is always saved first, regardless of its actual
register number. */
if (mask & (1 << returnreg))
{
struct frame_info *fi;
int regno;
{
- /* If it is the frame for sigtramp we have a pointer to the sigcontext
- on the stack.
- If the stack layout for __sigtramp changes or if sigcontext offsets
- change we might have to update this code. */
-#ifndef SIGFRAME_PC_OFF
-#define SIGFRAME_PC_OFF (2 * 8)
-#define SIGFRAME_REGSAVE_OFF (4 * 8)
-#endif
for (; fi; fi = fi->next)
{
- if (fi->signal_handler_caller)
- {
- int offset;
- CORE_ADDR sigcontext_addr = read_memory_integer(fi->frame, 8);
-
- if (regno == PC_REGNUM)
- offset = SIGFRAME_PC_OFF;
- else if (regno < 32)
- offset = SIGFRAME_REGSAVE_OFF + regno * 8;
- else
- return 0;
- return read_memory_integer(sigcontext_addr + offset, 8);
- }
- else if (regno == SP_REGNUM)
+ /* We have to get the saved sp from the sigcontext
+ if it is a signal handler frame. */
+ if (regno == SP_REGNUM && !fi->signal_handler_caller)
return fi->frame;
else
{
alpha_extra_func_info_t proc_desc = frame->proc_desc;
/* We have to get the saved pc from the sigcontext
if it is a signal handler frame. */
- int pcreg = frame->signal_handler_caller ? PC_REGNUM
- : (proc_desc ? PROC_PC_REG(proc_desc) : RA_REGNUM);
+ int pcreg = frame->signal_handler_caller ? PC_REGNUM : frame->pc_reg;
if (proc_desc && PROC_DESC_IS_DUMMY(proc_desc))
return read_memory_integer(frame->frame - 8, 8);
alpha_saved_pc_after_call (frame)
struct frame_info *frame;
{
- alpha_extra_func_info_t proc_desc = find_proc_desc (frame->pc, frame->next);
- int pcreg = proc_desc ? PROC_PC_REG (proc_desc) : RA_REGNUM;
+ CORE_ADDR pc = frame->pc;
+ CORE_ADDR tmp;
+ alpha_extra_func_info_t proc_desc;
+ int pcreg;
+
+ /* Skip over shared library trampoline if necessary. */
+ tmp = SKIP_TRAMPOLINE_CODE (pc);
+ if (tmp != 0)
+ pc = tmp;
+
+ proc_desc = find_proc_desc (pc, frame->next);
+ pcreg = proc_desc ? PROC_PC_REG (proc_desc) : RA_REGNUM;
return read_register (pcreg);
}
CORE_ADDR pc;
alpha_extra_func_info_t proc_desc;
{
- struct block *b;
struct symtab_and_line sal;
CORE_ADDR func_addr, func_end;
0, NULL);
}
+ /* If we never found a PDR for this function in symbol reading, then
+ examine prologues to find the information. */
+ if (sym && ((mips_extra_func_info_t) SYMBOL_VALUE (sym))->pdr.framereg == -1)
+ sym = NULL;
+
if (sym)
{
/* IF this is the topmost frame AND
alpha_extra_func_info_t found_heuristic =
heuristic_proc_desc (PROC_LOW_ADDR (proc_desc),
pc, next_frame);
- PROC_LOCALOFF (found_heuristic) = PROC_LOCALOFF (proc_desc);
if (found_heuristic)
- proc_desc = found_heuristic;
+ {
+ PROC_LOCALOFF (found_heuristic) =
+ PROC_LOCALOFF (proc_desc);
+ PROC_PC_REG (found_heuristic) = PROC_PC_REG (proc_desc);
+ proc_desc = found_heuristic;
+ }
}
}
}
frame->next ? cached_proc_desc : find_proc_desc(frame->pc, frame->next);
frame->saved_regs = NULL;
- frame->proc_desc =
- proc_desc == &temp_proc_desc ? 0 : proc_desc;
+ frame->localoff = 0;
+ frame->pc_reg = RA_REGNUM;
+ frame->proc_desc = proc_desc == &temp_proc_desc ? 0 : proc_desc;
if (proc_desc)
{
- /* Get the locals offset from the procedure descriptor, it is valid
- even if we are in the middle of the prologue. */
+ /* Get the locals offset and the saved pc register from the
+ procedure descriptor, they are valid even if we are in the
+ middle of the prologue. */
frame->localoff = PROC_LOCALOFF(proc_desc);
+ frame->pc_reg = PROC_PC_REG(proc_desc);
/* Fixup frame-pointer - only needed for top frame */
for (i = 0, m_arg = alpha_args; i < nargs; i++, m_arg++)
{
- value_ptr arg = value_arg_coerce (args[i]);
+ value_ptr arg = args[i];
/* Cast argument to long if necessary as the compiler does it too. */
- if (TYPE_LENGTH (VALUE_TYPE (arg)) < TYPE_LENGTH (builtin_type_long))
- arg = value_cast (builtin_type_long, arg);
+ switch (TYPE_CODE (VALUE_TYPE (arg)))
+ {
+ case TYPE_CODE_INT:
+ case TYPE_CODE_BOOL:
+ case TYPE_CODE_CHAR:
+ case TYPE_CODE_RANGE:
+ case TYPE_CODE_ENUM:
+ if (TYPE_LENGTH (VALUE_TYPE (arg)) < TYPE_LENGTH (builtin_type_long))
+ arg = value_cast (builtin_type_long, arg);
+ break;
+ default:
+ break;
+ }
m_arg->len = TYPE_LENGTH (VALUE_TYPE (arg));
m_arg->offset = accumulate_size;
accumulate_size = (accumulate_size + m_arg->len + 7) & ~7;
return pc + offset;
}
+#if 0
/* Is address PC in the prologue (loosely defined) for function at
STARTADDR? */
CORE_ADDR end_prologue = alpha_skip_prologue (startaddr, 1);
return pc >= startaddr && pc < end_prologue;
}
+#endif
/* The alpha needs a conversion between register and memory format if
the register is a floating point register and
char regbuf[REGISTER_BYTES];
char *valbuf;
{
- int regnum;
-
- regnum = TYPE_CODE (valtype) == TYPE_CODE_FLT ? FP0_REGNUM : V0_REGNUM;
-
- memcpy (valbuf, regbuf + REGISTER_BYTE (regnum), TYPE_LENGTH (valtype));
+ if (TYPE_CODE (valtype) == TYPE_CODE_FLT)
+ alpha_register_convert_to_virtual (FP0_REGNUM, valtype,
+ regbuf + REGISTER_BYTE (FP0_REGNUM),
+ valbuf);
+ else
+ memcpy (valbuf, regbuf + REGISTER_BYTE (V0_REGNUM), TYPE_LENGTH (valtype));
}
/* Given a return value in `regbuf' with a type `valtype',
struct type *valtype;
char *valbuf;
{
- int regnum;
char raw_buffer[MAX_REGISTER_RAW_SIZE];
+ int regnum = V0_REGNUM;
+ int length = TYPE_LENGTH (valtype);
- regnum = TYPE_CODE (valtype) == TYPE_CODE_FLT ? FP0_REGNUM : V0_REGNUM;
- memcpy(raw_buffer, valbuf, TYPE_LENGTH (valtype));
-
- write_register_bytes(REGISTER_BYTE (regnum), raw_buffer, TYPE_LENGTH (valtype));
-}
-
-/* Print the instruction at address MEMADDR in debugged memory,
- on STREAM. Returns length of the instruction, in bytes. */
-
-int
-print_insn (memaddr, stream)
- CORE_ADDR memaddr;
- GDB_FILE *stream;
-{
- disassemble_info info;
-
- GDB_INIT_DISASSEMBLE_INFO(info, stream);
+ if (TYPE_CODE (valtype) == TYPE_CODE_FLT)
+ {
+ regnum = FP0_REGNUM;
+ length = REGISTER_RAW_SIZE (regnum);
+ alpha_register_convert_to_raw (valtype, regnum, valbuf, raw_buffer);
+ }
+ else
+ memcpy (raw_buffer, valbuf, length);
- return print_insn_alpha (memaddr, &info);
+ write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, length);
}
/* Just like reinit_frame_cache, but with the right arguments to be
if (entry != 0)
return entry;
- sym = lookup_minimal_symbol ("_Prelude", symfile_objfile);
+ sym = lookup_minimal_symbol ("_Prelude", NULL, symfile_objfile);
if (!sym || MSYMBOL_TYPE (sym) != mst_text)
return 0;
{
struct cmd_list_element *c;
+ tm_print_insn = print_insn_alpha;
+
/* Let the user set the fence post for heuristic_proc_start. */
/* We really would like to have both "0" and "unlimited" work, but
projects / deliverable / binutils-gdb.git / blobdiff