/* Intel 386 target-dependent stuff.
- Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001
- Free Software Foundation, Inc.
+
+ Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
+ 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GDB.
#include "frame.h"
#include "inferior.h"
#include "gdbcore.h"
+#include "objfiles.h"
#include "target.h"
#include "floatformat.h"
+#include "symfile.h"
#include "symtab.h"
#include "gdbcmd.h"
#include "command.h"
#include "regcache.h"
#include "doublest.h"
#include "value.h"
-
#include "gdb_assert.h"
+#include "reggroups.h"
+#include "dummy-frame.h"
+#include "osabi.h"
+
+#include "i386-tdep.h"
+#include "i387-tdep.h"
-/* i386_register_byte[i] is the offset into the register file of the
- start of register number i. We initialize this from
- i386_register_raw_size. */
-int i386_register_byte[MAX_NUM_REGS];
-
-/* i386_register_raw_size[i] is the number of bytes of storage in
- GDB's register array occupied by register i. */
-int i386_register_raw_size[MAX_NUM_REGS] = {
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 10, 10, 10, 10,
- 10, 10, 10, 10,
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 16, 16, 16, 16,
- 16, 16, 16, 16,
- 4
+/* Names of the registers. The first 10 registers match the register
+ numbering scheme used by GCC for stabs and DWARF. */
+static char *i386_register_names[] =
+{
+ "eax", "ecx", "edx", "ebx",
+ "esp", "ebp", "esi", "edi",
+ "eip", "eflags", "cs", "ss",
+ "ds", "es", "fs", "gs",
+ "st0", "st1", "st2", "st3",
+ "st4", "st5", "st6", "st7",
+ "fctrl", "fstat", "ftag", "fiseg",
+ "fioff", "foseg", "fooff", "fop",
+ "xmm0", "xmm1", "xmm2", "xmm3",
+ "xmm4", "xmm5", "xmm6", "xmm7",
+ "mxcsr"
};
-/* i386_register_virtual_size[i] is the size in bytes of the virtual
- type of register i. */
-int i386_register_virtual_size[MAX_NUM_REGS];
+/* MMX registers. */
+
+static char *i386_mmx_names[] =
+{
+ "mm0", "mm1", "mm2", "mm3",
+ "mm4", "mm5", "mm6", "mm7"
+};
+static const int mmx_num_regs = (sizeof (i386_mmx_names)
+ / sizeof (i386_mmx_names[0]));
+#define MM0_REGNUM (NUM_REGS)
+
+static int
+i386_mmx_regnum_p (int reg)
+{
+ return (reg >= MM0_REGNUM && reg < MM0_REGNUM + mmx_num_regs);
+}
+
+/* FP register? */
+
+int
+i386_fp_regnum_p (int regnum)
+{
+ return (regnum < NUM_REGS
+ && (FP0_REGNUM && FP0_REGNUM <= (regnum) && (regnum) < FPC_REGNUM));
+}
+
+int
+i386_fpc_regnum_p (int regnum)
+{
+ return (regnum < NUM_REGS
+ && (FPC_REGNUM <= (regnum) && (regnum) < XMM0_REGNUM));
+}
+
+/* SSE register? */
+
+int
+i386_sse_regnum_p (int regnum)
+{
+ return (regnum < NUM_REGS
+ && (XMM0_REGNUM <= (regnum) && (regnum) < MXCSR_REGNUM));
+}
+
+int
+i386_mxcsr_regnum_p (int regnum)
+{
+ return (regnum < NUM_REGS
+ && (regnum == MXCSR_REGNUM));
+}
+
+/* Return the name of register REG. */
+
+const char *
+i386_register_name (int reg)
+{
+ if (reg < 0)
+ return NULL;
+ if (i386_mmx_regnum_p (reg))
+ return i386_mmx_names[reg - MM0_REGNUM];
+ if (reg >= sizeof (i386_register_names) / sizeof (*i386_register_names))
+ return NULL;
+
+ return i386_register_names[reg];
+}
/* Convert stabs register number REG to the appropriate register
number used by GDB. */
-int
+static int
i386_stab_reg_to_regnum (int reg)
{
/* This implements what GCC calls the "default" register map. */
else if (reg >= 29 && reg <= 36)
{
/* MMX registers. */
- /* FIXME: kettenis/2001-07-28: Should we have the MMX registers
- as pseudo-registers? */
- return reg - 29 + FP0_REGNUM;
+ return reg - 29 + MM0_REGNUM;
}
/* This will hopefully provoke a warning. */
return NUM_REGS + NUM_PSEUDO_REGS;
}
-/* Convert Dwarf register number REG to the appropriate register
+/* Convert DWARF register number REG to the appropriate register
number used by GDB. */
-int
+static int
i386_dwarf_reg_to_regnum (int reg)
{
/* The DWARF register numbering includes %eip and %eflags, and
};
static const char *disassembly_flavor = att_flavor;
-/* This is used to keep the bfd arch_info in sync with the disassembly
- flavor. */
-static void set_disassembly_flavor_sfunc (char *, int,
- struct cmd_list_element *);
-static void set_disassembly_flavor (void);
-\f
-
/* Stdio style buffering was used to minimize calls to ptrace, but
this buffering did not take into account that the code section
being accessed may not be an even number of buffers long (even if
return (-1);
}
+/* Signal trampolines don't have a meaningful frame. The frame
+ pointer value we use is actually the frame pointer of the calling
+ frame -- that is, the frame which was in progress when the signal
+ trampoline was entered. GDB mostly treats this frame pointer value
+ as a magic cookie. We detect the case of a signal trampoline by
+ testing for get_frame_type() == SIGTRAMP_FRAME, which is set based
+ on PC_IN_SIGTRAMP.
+
+ When a signal trampoline is invoked from a frameless function, we
+ essentially have two frameless functions in a row. In this case,
+ we use the same magic cookie for three frames in a row. We detect
+ this case by seeing whether the next frame is a SIGTRAMP_FRAME,
+ and, if it does, checking whether the current frame is actually
+ frameless. In this case, we need to get the PC by looking at the
+ SP register value stored in the signal context.
+
+ This should work in most cases except in horrible situations where
+ a signal occurs just as we enter a function but before the frame
+ has been set up. Incidentally, that's just what happens when we
+ call a function from GDB with a signal pending (there's a test in
+ the testsuite that makes this happen). Therefore we pretend that
+ we have a frameless function if we're stopped at the start of a
+ function. */
+
+/* Return non-zero if we're dealing with a frameless signal, that is,
+ a signal trampoline invoked from a frameless function. */
+
+int
+i386_frameless_signal_p (struct frame_info *frame)
+{
+ return (get_next_frame (frame)
+ && get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME
+ && (frameless_look_for_prologue (frame)
+ || get_frame_pc (frame) == get_frame_func (frame)));
+}
+
/* Return the chain-pointer for FRAME. In the case of the i386, the
frame's nominal address is the address of a 4-byte word containing
the calling frame's address. */
-CORE_ADDR
+static CORE_ADDR
i386_frame_chain (struct frame_info *frame)
{
- if (frame->signal_handler_caller)
- return frame->frame;
+ if (pc_in_dummy_frame (get_frame_pc (frame)))
+ return get_frame_base (frame);
- if (! inside_entry_file (frame->pc))
- return read_memory_unsigned_integer (frame->frame, 4);
+ if (get_frame_type (frame) == SIGTRAMP_FRAME
+ || i386_frameless_signal_p (frame))
+ return get_frame_base (frame);
+
+ if (! inside_entry_file (get_frame_pc (frame)))
+ return read_memory_unsigned_integer (get_frame_base (frame), 4);
return 0;
}
not have a from on the stack associated with it. If it does not,
return non-zero, otherwise return zero. */
-int
+static int
i386_frameless_function_invocation (struct frame_info *frame)
{
- if (frame->signal_handler_caller)
+ if (get_frame_type (frame) == SIGTRAMP_FRAME)
return 0;
return frameless_look_for_prologue (frame);
}
+/* Assuming FRAME is for a sigtramp routine, return the saved program
+ counter. */
+
+static CORE_ADDR
+i386_sigtramp_saved_pc (struct frame_info *frame)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ CORE_ADDR addr;
+
+ addr = tdep->sigcontext_addr (frame);
+ return read_memory_unsigned_integer (addr + tdep->sc_pc_offset, 4);
+}
+
+/* Assuming FRAME is for a sigtramp routine, return the saved stack
+ pointer. */
+
+static CORE_ADDR
+i386_sigtramp_saved_sp (struct frame_info *frame)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ CORE_ADDR addr;
+
+ addr = tdep->sigcontext_addr (frame);
+ return read_memory_unsigned_integer (addr + tdep->sc_sp_offset, 4);
+}
+
/* Return the saved program counter for FRAME. */
-CORE_ADDR
+static CORE_ADDR
i386_frame_saved_pc (struct frame_info *frame)
{
- /* FIXME: kettenis/2001-05-09: Conditionalizing the next bit of code
- on SIGCONTEXT_PC_OFFSET and I386V4_SIGTRAMP_SAVED_PC should be
- considered a temporary hack. I plan to come up with something
- better when we go multi-arch. */
-#if defined (SIGCONTEXT_PC_OFFSET) || defined (I386V4_SIGTRAMP_SAVED_PC)
- if (frame->signal_handler_caller)
- return sigtramp_saved_pc (frame);
-#endif
+ if (pc_in_dummy_frame (get_frame_pc (frame)))
+ {
+ ULONGEST pc;
- return read_memory_unsigned_integer (frame->frame + 4, 4);
+ frame_unwind_unsigned_register (frame, PC_REGNUM, &pc);
+ return pc;
+ }
+
+ if (get_frame_type (frame) == SIGTRAMP_FRAME)
+ return i386_sigtramp_saved_pc (frame);
+
+ if (i386_frameless_signal_p (frame))
+ {
+ CORE_ADDR sp = i386_sigtramp_saved_sp (get_next_frame (frame));
+ return read_memory_unsigned_integer (sp, 4);
+ }
+
+ return read_memory_unsigned_integer (get_frame_base (frame) + 4, 4);
}
/* Immediately after a function call, return the saved pc. */
-CORE_ADDR
+static CORE_ADDR
i386_saved_pc_after_call (struct frame_info *frame)
{
+ if (get_frame_type (frame) == SIGTRAMP_FRAME)
+ return i386_sigtramp_saved_pc (frame);
+
return read_memory_unsigned_integer (read_register (SP_REGNUM), 4);
}
/* Return number of args passed to a frame.
Can return -1, meaning no way to tell. */
-int
+static int
i386_frame_num_args (struct frame_info *fi)
{
#if 1
if (pfi == 0)
{
/* NOTE: This can happen if we are looking at the frame for
- main, because FRAME_CHAIN_VALID won't let us go into start.
- If we have debugging symbols, that's not really a big deal;
- it just means it will only show as many arguments to main as
- are declared. */
+ main, because DEPRECATED_FRAME_CHAIN_VALID won't let us go
+ into start. If we have debugging symbols, that's not really
+ a big deal; it just means it will only show as many arguments
+ to main as are declared. */
return -1;
}
else
If the setup sequence is at the end of the function, then the next
instruction will be a branch back to the start. */
-void
+static void
i386_frame_init_saved_regs (struct frame_info *fip)
{
long locals = -1;
unsigned char op;
- CORE_ADDR dummy_bottom;
CORE_ADDR addr;
CORE_ADDR pc;
int i;
- if (fip->saved_regs)
+ if (get_frame_saved_regs (fip))
return;
frame_saved_regs_zalloc (fip);
- /* If the frame is the end of a dummy, compute where the beginning
- would be. */
- dummy_bottom = fip->frame - 4 - REGISTER_BYTES - CALL_DUMMY_LENGTH;
-
- /* Check if the PC points in the stack, in a dummy frame. */
- if (dummy_bottom <= fip->pc && fip->pc <= fip->frame)
- {
- /* All registers were saved by push_call_dummy. */
- addr = fip->frame;
- for (i = 0; i < NUM_REGS; i++)
- {
- addr -= REGISTER_RAW_SIZE (i);
- fip->saved_regs[i] = addr;
- }
- return;
- }
-
- pc = get_pc_function_start (fip->pc);
+ pc = get_frame_func (fip);
if (pc != 0)
locals = i386_get_frame_setup (pc);
if (locals >= 0)
{
- addr = fip->frame - 4 - locals;
+ addr = get_frame_base (fip) - 4 - locals;
for (i = 0; i < 8; i++)
{
op = codestream_get ();
break;
#ifdef I386_REGNO_TO_SYMMETRY
/* Dynix uses different internal numbering. Ick. */
- fip->saved_regs[I386_REGNO_TO_SYMMETRY (op - 0x50)] = addr;
+ get_frame_saved_regs (fip)[I386_REGNO_TO_SYMMETRY (op - 0x50)] = addr;
#else
- fip->saved_regs[op - 0x50] = addr;
+ get_frame_saved_regs (fip)[op - 0x50] = addr;
#endif
addr -= 4;
}
}
- fip->saved_regs[PC_REGNUM] = fip->frame + 4;
- fip->saved_regs[FP_REGNUM] = fip->frame;
+ get_frame_saved_regs (fip)[PC_REGNUM] = get_frame_base (fip) + 4;
+ get_frame_saved_regs (fip)[FP_REGNUM] = get_frame_base (fip);
}
/* Return PC of first real instruction. */
-int
-i386_skip_prologue (int pc)
+static CORE_ADDR
+i386_skip_prologue (CORE_ADDR pc)
{
unsigned char op;
int i;
return (codestream_tell ());
}
-void
-i386_push_dummy_frame (void)
-{
- CORE_ADDR sp = read_register (SP_REGNUM);
- int regnum;
- char regbuf[MAX_REGISTER_RAW_SIZE];
+/* Use the program counter to determine the contents and size of a
+ breakpoint instruction. Return a pointer to a string of bytes that
+ encode a breakpoint instruction, store the length of the string in
+ *LEN and optionally adjust *PC to point to the correct memory
+ location for inserting the breakpoint.
- sp = push_word (sp, read_register (PC_REGNUM));
- sp = push_word (sp, read_register (FP_REGNUM));
- write_register (FP_REGNUM, sp);
- for (regnum = 0; regnum < NUM_REGS; regnum++)
- {
- read_register_gen (regnum, regbuf);
- sp = push_bytes (sp, regbuf, REGISTER_RAW_SIZE (regnum));
- }
- write_register (SP_REGNUM, sp);
+ On the i386 we have a single breakpoint that fits in a single byte
+ and can be inserted anywhere. */
+
+static const unsigned char *
+i386_breakpoint_from_pc (CORE_ADDR *pc, int *len)
+{
+ static unsigned char break_insn[] = { 0xcc }; /* int 3 */
+
+ *len = sizeof (break_insn);
+ return break_insn;
}
-/* Insert the (relative) function address into the call sequence
- stored at DYMMY. */
+/* Push the return address (pointing to the call dummy) onto the stack
+ and return the new value for the stack pointer. */
-void
-i386_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs,
- struct value **args, struct type *type, int gcc_p)
+static CORE_ADDR
+i386_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
{
- int from, to, delta, loc;
-
- loc = (int)(read_register (SP_REGNUM) - CALL_DUMMY_LENGTH);
- from = loc + 5;
- to = (int)(fun);
- delta = to - from;
+ char buf[4];
- *((char *)(dummy) + 1) = (delta & 0xff);
- *((char *)(dummy) + 2) = ((delta >> 8) & 0xff);
- *((char *)(dummy) + 3) = ((delta >> 16) & 0xff);
- *((char *)(dummy) + 4) = ((delta >> 24) & 0xff);
+ store_unsigned_integer (buf, 4, CALL_DUMMY_ADDRESS ());
+ write_memory (sp - 4, buf, 4);
+ return sp - 4;
}
-void
-i386_pop_frame (void)
+static void
+i386_do_pop_frame (struct frame_info *frame)
{
- struct frame_info *frame = get_current_frame ();
CORE_ADDR fp;
int regnum;
- char regbuf[MAX_REGISTER_RAW_SIZE];
+ char regbuf[I386_MAX_REGISTER_SIZE];
- fp = FRAME_FP (frame);
+ fp = get_frame_base (frame);
i386_frame_init_saved_regs (frame);
for (regnum = 0; regnum < NUM_REGS; regnum++)
{
CORE_ADDR addr;
- addr = frame->saved_regs[regnum];
+ addr = get_frame_saved_regs (frame)[regnum];
if (addr)
{
read_memory (addr, regbuf, REGISTER_RAW_SIZE (regnum));
- write_register_bytes (REGISTER_BYTE (regnum), regbuf,
- REGISTER_RAW_SIZE (regnum));
+ deprecated_write_register_gen (regnum, regbuf);
}
}
write_register (FP_REGNUM, read_memory_integer (fp, 4));
write_register (SP_REGNUM, fp + 8);
flush_cached_frames ();
}
-\f
-#ifdef GET_LONGJMP_TARGET
+static void
+i386_pop_frame (void)
+{
+ generic_pop_current_frame (i386_do_pop_frame);
+}
+\f
/* Figure out where the longjmp will land. Slurp the args out of the
stack. We expect the first arg to be a pointer to the jmp_buf
- structure from which we extract the pc (JB_PC) that we will land
- at. The pc is copied into PC. This routine returns true on
+ structure from which we extract the address that we will land at.
+ This address is copied into PC. This routine returns non-zero on
success. */
-int
-get_longjmp_target (CORE_ADDR *pc)
+static int
+i386_get_longjmp_target (CORE_ADDR *pc)
{
- char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
+ char buf[8];
CORE_ADDR sp, jb_addr;
+ int jb_pc_offset = gdbarch_tdep (current_gdbarch)->jb_pc_offset;
+ int len = TARGET_PTR_BIT / TARGET_CHAR_BIT;
- sp = read_register (SP_REGNUM);
-
- if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack. */
- buf,
- TARGET_PTR_BIT / TARGET_CHAR_BIT))
+ /* If JB_PC_OFFSET is -1, we have no way to find out where the
+ longjmp will land. */
+ if (jb_pc_offset == -1)
return 0;
- jb_addr = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
-
- if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
- TARGET_PTR_BIT / TARGET_CHAR_BIT))
+ sp = read_register (SP_REGNUM);
+ if (target_read_memory (sp + len, buf, len))
return 0;
- *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+ jb_addr = extract_address (buf, len);
+ if (target_read_memory (jb_addr + jb_pc_offset, buf, len))
+ return 0;
+ *pc = extract_address (buf, len);
return 1;
}
-
-#endif /* GET_LONGJMP_TARGET */
\f
-CORE_ADDR
+static CORE_ADDR
i386_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
{
- sp = default_push_arguments (nargs, args, sp, struct_return, struct_addr);
+ sp = legacy_push_arguments (nargs, args, sp, struct_return, struct_addr);
if (struct_return)
{
return sp;
}
-void
-i386_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
-{
- /* Do nothing. Everything was already done by i386_push_arguments. */
-}
-
/* These registers are used for returning integers (and on some
targets also for returning `struct' and `union' values when their
size and alignment match an integer type). */
function return value of TYPE, and copy that, in virtual format,
into VALBUF. */
-void
-i386_extract_return_value (struct type *type, char *regbuf, char *valbuf)
+static void
+i386_extract_return_value (struct type *type, struct regcache *regcache,
+ void *dst)
{
+ bfd_byte *valbuf = dst;
int len = TYPE_LENGTH (type);
+ char buf[I386_MAX_REGISTER_SIZE];
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
&& TYPE_NFIELDS (type) == 1)
{
- i386_extract_return_value (TYPE_FIELD_TYPE (type, 0), regbuf, valbuf);
+ i386_extract_return_value (TYPE_FIELD_TYPE (type, 0), regcache, valbuf);
return;
}
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
- if (NUM_FREGS == 0)
+ if (FP0_REGNUM == 0)
{
warning ("Cannot find floating-point return value.");
memset (valbuf, 0, len);
return;
}
- /* Floating-point return values can be found in %st(0). */
- if (len == TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT
- && TARGET_LONG_DOUBLE_FORMAT == &floatformat_i387_ext)
- {
- /* Copy straight over, but take care of the padding. */
- memcpy (valbuf, ®buf[REGISTER_BYTE (FP0_REGNUM)],
- FPU_REG_RAW_SIZE);
- memset (valbuf + FPU_REG_RAW_SIZE, 0, len - FPU_REG_RAW_SIZE);
- }
- else
- {
- /* Convert the extended floating-point number found in
- %st(0) to the desired type. This is probably not exactly
- how it would happen on the target itself, but it is the
- best we can do. */
- DOUBLEST val;
- floatformat_to_doublest (&floatformat_i387_ext,
- ®buf[REGISTER_BYTE (FP0_REGNUM)], &val);
- store_floating (valbuf, TYPE_LENGTH (type), val);
- }
+ /* Floating-point return values can be found in %st(0). Convert
+ its contents to the desired type. This is probably not
+ exactly how it would happen on the target itself, but it is
+ the best we can do. */
+ regcache_raw_read (regcache, FP0_REGNUM, buf);
+ convert_typed_floating (buf, builtin_type_i387_ext, valbuf, type);
}
else
{
int high_size = REGISTER_RAW_SIZE (HIGH_RETURN_REGNUM);
if (len <= low_size)
- memcpy (valbuf, ®buf[REGISTER_BYTE (LOW_RETURN_REGNUM)], len);
+ {
+ regcache_raw_read (regcache, LOW_RETURN_REGNUM, buf);
+ memcpy (valbuf, buf, len);
+ }
else if (len <= (low_size + high_size))
{
- memcpy (valbuf,
- ®buf[REGISTER_BYTE (LOW_RETURN_REGNUM)], low_size);
- memcpy (valbuf + low_size,
- ®buf[REGISTER_BYTE (HIGH_RETURN_REGNUM)], len - low_size);
+ regcache_raw_read (regcache, LOW_RETURN_REGNUM, buf);
+ memcpy (valbuf, buf, low_size);
+ regcache_raw_read (regcache, HIGH_RETURN_REGNUM, buf);
+ memcpy (valbuf + low_size, buf, len - low_size);
}
else
internal_error (__FILE__, __LINE__,
/* Write into the appropriate registers a function return value stored
in VALBUF of type TYPE, given in virtual format. */
-void
-i386_store_return_value (struct type *type, char *valbuf)
+static void
+i386_store_return_value (struct type *type, struct regcache *regcache,
+ const void *valbuf)
{
int len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
&& TYPE_NFIELDS (type) == 1)
{
- i386_store_return_value (TYPE_FIELD_TYPE (type, 0), valbuf);
+ i386_store_return_value (TYPE_FIELD_TYPE (type, 0), regcache, valbuf);
return;
}
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
- unsigned int fstat;
+ ULONGEST fstat;
+ char buf[FPU_REG_RAW_SIZE];
- if (NUM_FREGS == 0)
+ if (FP0_REGNUM == 0)
{
warning ("Cannot set floating-point return value.");
return;
storing the return value in %st(0), we have to simulate the
state of the FPU at function return point. */
- if (len == TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT
- && TARGET_LONG_DOUBLE_FORMAT == &floatformat_i387_ext)
- {
- /* Copy straight over. */
- write_register_bytes (REGISTER_BYTE (FP0_REGNUM), valbuf,
- FPU_REG_RAW_SIZE);
- }
- else
- {
- char buf[FPU_REG_RAW_SIZE];
- DOUBLEST val;
-
- /* Convert the value found in VALBUF to the extended
- floating-point format used by the FPU. This is probably
- not exactly how it would happen on the target itself, but
- it is the best we can do. */
- val = extract_floating (valbuf, TYPE_LENGTH (type));
- floatformat_from_doublest (&floatformat_i387_ext, &val, buf);
- write_register_bytes (REGISTER_BYTE (FP0_REGNUM), buf,
- FPU_REG_RAW_SIZE);
- }
+ /* Convert the value found in VALBUF to the extended
+ floating-point format used by the FPU. This is probably
+ not exactly how it would happen on the target itself, but
+ it is the best we can do. */
+ convert_typed_floating (valbuf, type, buf, builtin_type_i387_ext);
+ regcache_raw_write (regcache, FP0_REGNUM, buf);
/* Set the top of the floating-point register stack to 7. The
actual value doesn't really matter, but 7 is what a normal
function return would end up with if the program started out
with a freshly initialized FPU. */
- fstat = read_register (FSTAT_REGNUM);
+ regcache_raw_read_unsigned (regcache, FSTAT_REGNUM, &fstat);
fstat |= (7 << 11);
- write_register (FSTAT_REGNUM, fstat);
+ regcache_raw_write_unsigned (regcache, FSTAT_REGNUM, fstat);
/* Mark %st(1) through %st(7) as empty. Since we set the top of
the floating-point register stack to 7, the appropriate value
for the tag word is 0x3fff. */
- write_register (FTAG_REGNUM, 0x3fff);
+ regcache_raw_write_unsigned (regcache, FTAG_REGNUM, 0x3fff);
}
else
{
int high_size = REGISTER_RAW_SIZE (HIGH_RETURN_REGNUM);
if (len <= low_size)
- write_register_bytes (REGISTER_BYTE (LOW_RETURN_REGNUM), valbuf, len);
+ regcache_raw_write_part (regcache, LOW_RETURN_REGNUM, 0, len, valbuf);
else if (len <= (low_size + high_size))
{
- write_register_bytes (REGISTER_BYTE (LOW_RETURN_REGNUM),
- valbuf, low_size);
- write_register_bytes (REGISTER_BYTE (HIGH_RETURN_REGNUM),
- valbuf + low_size, len - low_size);
+ regcache_raw_write (regcache, LOW_RETURN_REGNUM, valbuf);
+ regcache_raw_write_part (regcache, HIGH_RETURN_REGNUM, 0,
+ len - low_size, (char *) valbuf + low_size);
}
else
internal_error (__FILE__, __LINE__,
}
}
-/* Extract from an array REGBUF containing the (raw) register state
- the address in which a function should return its structure value,
- as a CORE_ADDR. */
+/* Extract from REGCACHE, which contains the (raw) register state, the
+ address in which a function should return its structure value, as a
+ CORE_ADDR. */
-CORE_ADDR
-i386_extract_struct_value_address (char *regbuf)
+static CORE_ADDR
+i386_extract_struct_value_address (struct regcache *regcache)
+{
+ ULONGEST addr;
+
+ regcache_raw_read_unsigned (regcache, LOW_RETURN_REGNUM, &addr);
+ return addr;
+}
+\f
+
+/* This is the variable that is set with "set struct-convention", and
+ its legitimate values. */
+static const char default_struct_convention[] = "default";
+static const char pcc_struct_convention[] = "pcc";
+static const char reg_struct_convention[] = "reg";
+static const char *valid_conventions[] =
+{
+ default_struct_convention,
+ pcc_struct_convention,
+ reg_struct_convention,
+ NULL
+};
+static const char *struct_convention = default_struct_convention;
+
+static int
+i386_use_struct_convention (int gcc_p, struct type *type)
{
- return extract_address (®buf[REGISTER_BYTE (LOW_RETURN_REGNUM)],
- REGISTER_RAW_SIZE (LOW_RETURN_REGNUM));
+ enum struct_return struct_return;
+
+ if (struct_convention == default_struct_convention)
+ struct_return = gdbarch_tdep (current_gdbarch)->struct_return;
+ else if (struct_convention == pcc_struct_convention)
+ struct_return = pcc_struct_return;
+ else
+ struct_return = reg_struct_return;
+
+ return generic_use_struct_convention (struct_return == reg_struct_return,
+ type);
}
\f
register REGNUM. Perhaps %esi and %edi should go here, but
potentially they could be used for things other than address. */
-struct type *
-i386_register_virtual_type (int regnum)
+static struct type *
+i386_register_type (struct gdbarch *gdbarch, int regnum)
{
if (regnum == PC_REGNUM || regnum == FP_REGNUM || regnum == SP_REGNUM)
return lookup_pointer_type (builtin_type_void);
- if (IS_FP_REGNUM (regnum))
- return builtin_type_long_double;
+ if (i386_fp_regnum_p (regnum))
+ return builtin_type_i387_ext;
- if (IS_SSE_REGNUM (regnum))
- return builtin_type_v4sf;
+ if (i386_sse_regnum_p (regnum))
+ return builtin_type_vec128i;
+
+ if (i386_mmx_regnum_p (regnum))
+ return builtin_type_vec64i;
return builtin_type_int;
}
+/* Map a cooked register onto a raw register or memory. For the i386,
+ the MMX registers need to be mapped onto floating point registers. */
+
+static int
+mmx_regnum_to_fp_regnum (struct regcache *regcache, int regnum)
+{
+ int mmxi;
+ ULONGEST fstat;
+ int tos;
+ int fpi;
+ mmxi = regnum - MM0_REGNUM;
+ regcache_raw_read_unsigned (regcache, FSTAT_REGNUM, &fstat);
+ tos = (fstat >> 11) & 0x7;
+ fpi = (mmxi + tos) % 8;
+ return (FP0_REGNUM + fpi);
+}
+
+static void
+i386_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, void *buf)
+{
+ if (i386_mmx_regnum_p (regnum))
+ {
+ char *mmx_buf = alloca (MAX_REGISTER_RAW_SIZE);
+ int fpnum = mmx_regnum_to_fp_regnum (regcache, regnum);
+ regcache_raw_read (regcache, fpnum, mmx_buf);
+ /* Extract (always little endian). */
+ memcpy (buf, mmx_buf, REGISTER_RAW_SIZE (regnum));
+ }
+ else
+ regcache_raw_read (regcache, regnum, buf);
+}
+
+static void
+i386_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, const void *buf)
+{
+ if (i386_mmx_regnum_p (regnum))
+ {
+ char *mmx_buf = alloca (MAX_REGISTER_RAW_SIZE);
+ int fpnum = mmx_regnum_to_fp_regnum (regcache, regnum);
+ /* Read ... */
+ regcache_raw_read (regcache, fpnum, mmx_buf);
+ /* ... Modify ... (always little endian). */
+ memcpy (mmx_buf, buf, REGISTER_RAW_SIZE (regnum));
+ /* ... Write. */
+ regcache_raw_write (regcache, fpnum, mmx_buf);
+ }
+ else
+ regcache_raw_write (regcache, regnum, buf);
+}
+
/* Return true iff register REGNUM's virtual format is different from
its raw format. Note that this definition assumes that the host
supports IEEE 32-bit floats, since it doesn't say that SSE
registers need conversion. Even if we can't find a counterexample,
this is still sloppy. */
-int
+static int
i386_register_convertible (int regnum)
{
- return IS_FP_REGNUM (regnum);
+ return i386_fp_regnum_p (regnum);
}
/* Convert data from raw format for register REGNUM in buffer FROM to
virtual format with type TYPE in buffer TO. */
-void
+static void
i386_register_convert_to_virtual (int regnum, struct type *type,
char *from, char *to)
{
- char buf[12];
- DOUBLEST d;
+ gdb_assert (i386_fp_regnum_p (regnum));
/* We only support floating-point values. */
if (TYPE_CODE (type) != TYPE_CODE_FLT)
return;
}
- /* First add the necessary padding. */
- memcpy (buf, from, FPU_REG_RAW_SIZE);
- memset (buf + FPU_REG_RAW_SIZE, 0, sizeof buf - FPU_REG_RAW_SIZE);
-
- /* Convert to TYPE. This should be a no-op, if TYPE is equivalent
- to the extended floating-point format used by the FPU. */
- d = extract_floating (buf, sizeof buf);
- store_floating (to, TYPE_LENGTH (type), d);
+ /* Convert to TYPE. This should be a no-op if TYPE is equivalent to
+ the extended floating-point format used by the FPU. */
+ convert_typed_floating (from, builtin_type_i387_ext, to, type);
}
/* Convert data from virtual format with type TYPE in buffer FROM to
raw format for register REGNUM in buffer TO. */
-void
+static void
i386_register_convert_to_raw (struct type *type, int regnum,
char *from, char *to)
{
- gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT
- && TYPE_LENGTH (type) == 12);
-
- /* Simply omit the two unused bytes. */
- memcpy (to, from, FPU_REG_RAW_SIZE);
-}
-\f
+ gdb_assert (i386_fp_regnum_p (regnum));
-#ifdef I386V4_SIGTRAMP_SAVED_PC
-/* Get saved user PC for sigtramp from the pushed ucontext on the
- stack for all three variants of SVR4 sigtramps. */
-
-CORE_ADDR
-i386v4_sigtramp_saved_pc (struct frame_info *frame)
-{
- CORE_ADDR saved_pc_offset = 4;
- char *name = NULL;
-
- find_pc_partial_function (frame->pc, &name, NULL, NULL);
- if (name)
+ /* We only support floating-point values. */
+ if (TYPE_CODE (type) != TYPE_CODE_FLT)
{
- if (STREQ (name, "_sigreturn"))
- saved_pc_offset = 132 + 14 * 4;
- else if (STREQ (name, "_sigacthandler"))
- saved_pc_offset = 80 + 14 * 4;
- else if (STREQ (name, "sigvechandler"))
- saved_pc_offset = 120 + 14 * 4;
+ warning ("Cannot convert non-floating-point type "
+ "to floating-point register value.");
+ memset (to, 0, TYPE_LENGTH (type));
+ return;
}
- if (frame->next)
- return read_memory_integer (frame->next->frame + saved_pc_offset, 4);
- return read_memory_integer (read_register (SP_REGNUM) + saved_pc_offset, 4);
+ /* Convert from TYPE. This should be a no-op if TYPE is equivalent
+ to the extended floating-point format used by the FPU. */
+ convert_typed_floating (from, type, to, builtin_type_i387_ext);
}
-#endif /* I386V4_SIGTRAMP_SAVED_PC */
-\f
+\f
#ifdef STATIC_TRANSFORM_NAME
/* SunPRO encodes the static variables. This is not related to C++
/* Stuff for WIN32 PE style DLL's but is pretty generic really. */
CORE_ADDR
-skip_trampoline_code (CORE_ADDR pc, char *name)
+i386_pe_skip_trampoline_code (CORE_ADDR pc, char *name)
{
if (pc && read_memory_unsigned_integer (pc, 2) == 0x25ff) /* jmp *(dest) */
{
unsigned long indirect = read_memory_unsigned_integer (pc + 2, 4);
struct minimal_symbol *indsym =
indirect ? lookup_minimal_symbol_by_pc (indirect) : 0;
- char *symname = indsym ? SYMBOL_NAME (indsym) : 0;
+ char *symname = indsym ? SYMBOL_LINKAGE_NAME (indsym) : 0;
if (symname)
{
}
\f
+/* Return non-zero if PC and NAME show that we are in a signal
+ trampoline. */
+
+static int
+i386_pc_in_sigtramp (CORE_ADDR pc, char *name)
+{
+ return (name && strcmp ("_sigtramp", name) == 0);
+}
+\f
+
/* We have two flavours of disassembly. The machinery on this page
deals with switching between those. */
static int
-gdb_print_insn_i386 (bfd_vma memaddr, disassemble_info *info)
+i386_print_insn (bfd_vma pc, disassemble_info *info)
+{
+ gdb_assert (disassembly_flavor == att_flavor
+ || disassembly_flavor == intel_flavor);
+
+ /* FIXME: kettenis/20020915: Until disassembler_options is properly
+ constified, cast to prevent a compiler warning. */
+ info->disassembler_options = (char *) disassembly_flavor;
+ info->mach = gdbarch_bfd_arch_info (current_gdbarch)->mach;
+
+ return print_insn_i386 (pc, info);
+}
+\f
+
+/* There are a few i386 architecture variants that differ only
+ slightly from the generic i386 target. For now, we don't give them
+ their own source file, but include them here. As a consequence,
+ they'll always be included. */
+
+/* System V Release 4 (SVR4). */
+
+static int
+i386_svr4_pc_in_sigtramp (CORE_ADDR pc, char *name)
+{
+ return (name && (strcmp ("_sigreturn", name) == 0
+ || strcmp ("_sigacthandler", name) == 0
+ || strcmp ("sigvechandler", name) == 0));
+}
+
+/* Get address of the pushed ucontext (sigcontext) on the stack for
+ all three variants of SVR4 sigtramps. */
+
+static CORE_ADDR
+i386_svr4_sigcontext_addr (struct frame_info *frame)
+{
+ int sigcontext_offset = -1;
+ char *name = NULL;
+
+ find_pc_partial_function (get_frame_pc (frame), &name, NULL, NULL);
+ if (name)
+ {
+ if (strcmp (name, "_sigreturn") == 0)
+ sigcontext_offset = 132;
+ else if (strcmp (name, "_sigacthandler") == 0)
+ sigcontext_offset = 80;
+ else if (strcmp (name, "sigvechandler") == 0)
+ sigcontext_offset = 120;
+ }
+
+ gdb_assert (sigcontext_offset != -1);
+
+ if (get_next_frame (frame))
+ return get_frame_base (get_next_frame (frame)) + sigcontext_offset;
+ return read_register (SP_REGNUM) + sigcontext_offset;
+}
+\f
+
+/* DJGPP. */
+
+static int
+i386_go32_pc_in_sigtramp (CORE_ADDR pc, char *name)
+{
+ /* DJGPP doesn't have any special frames for signal handlers. */
+ return 0;
+}
+\f
+
+/* Generic ELF. */
+
+void
+i386_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ /* We typically use stabs-in-ELF with the DWARF register numbering. */
+ set_gdbarch_stab_reg_to_regnum (gdbarch, i386_dwarf_reg_to_regnum);
+}
+
+/* System V Release 4 (SVR4). */
+
+void
+i386_svr4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- if (disassembly_flavor == att_flavor)
- return print_insn_i386_att (memaddr, info);
- else if (disassembly_flavor == intel_flavor)
- return print_insn_i386_intel (memaddr, info);
- /* Never reached -- disassembly_flavour is always either att_flavor
- or intel_flavor. */
- internal_error (__FILE__, __LINE__, "failed internal consistency check");
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* System V Release 4 uses ELF. */
+ i386_elf_init_abi (info, gdbarch);
+
+ /* System V Release 4 has shared libraries. */
+ set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section);
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+
+ set_gdbarch_pc_in_sigtramp (gdbarch, i386_svr4_pc_in_sigtramp);
+ tdep->sigcontext_addr = i386_svr4_sigcontext_addr;
+ tdep->sc_pc_offset = 14 * 4;
+ tdep->sc_sp_offset = 7 * 4;
+
+ tdep->jb_pc_offset = 20;
}
-/* If the disassembly mode is intel, we have to also switch the bfd
- mach_type. This function is run in the set disassembly_flavor
- command, and does that. */
+/* DJGPP. */
static void
-set_disassembly_flavor_sfunc (char *args, int from_tty,
- struct cmd_list_element *c)
+i386_go32_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- set_disassembly_flavor ();
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ set_gdbarch_pc_in_sigtramp (gdbarch, i386_go32_pc_in_sigtramp);
+
+ tdep->jb_pc_offset = 36;
}
+/* NetWare. */
+
static void
-set_disassembly_flavor (void)
+i386_nw_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- if (disassembly_flavor == att_flavor)
- set_architecture_from_arch_mach (bfd_arch_i386, bfd_mach_i386_i386);
- else if (disassembly_flavor == intel_flavor)
- set_architecture_from_arch_mach (bfd_arch_i386,
- bfd_mach_i386_i386_intel_syntax);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ tdep->jb_pc_offset = 24;
+}
+\f
+
+/* i386 register groups. In addition to the normal groups, add "mmx"
+ and "sse". */
+
+static struct reggroup *i386_sse_reggroup;
+static struct reggroup *i386_mmx_reggroup;
+
+static void
+i386_init_reggroups (void)
+{
+ i386_sse_reggroup = reggroup_new ("sse", USER_REGGROUP);
+ i386_mmx_reggroup = reggroup_new ("mmx", USER_REGGROUP);
+}
+
+static void
+i386_add_reggroups (struct gdbarch *gdbarch)
+{
+ reggroup_add (gdbarch, i386_sse_reggroup);
+ reggroup_add (gdbarch, i386_mmx_reggroup);
+ reggroup_add (gdbarch, general_reggroup);
+ reggroup_add (gdbarch, float_reggroup);
+ reggroup_add (gdbarch, all_reggroup);
+ reggroup_add (gdbarch, save_reggroup);
+ reggroup_add (gdbarch, restore_reggroup);
+ reggroup_add (gdbarch, vector_reggroup);
+ reggroup_add (gdbarch, system_reggroup);
+}
+
+int
+i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
+ struct reggroup *group)
+{
+ int sse_regnum_p = (i386_sse_regnum_p (regnum)
+ || i386_mxcsr_regnum_p (regnum));
+ int fp_regnum_p = (i386_fp_regnum_p (regnum)
+ || i386_fpc_regnum_p (regnum));
+ int mmx_regnum_p = (i386_mmx_regnum_p (regnum));
+ if (group == i386_mmx_reggroup)
+ return mmx_regnum_p;
+ if (group == i386_sse_reggroup)
+ return sse_regnum_p;
+ if (group == vector_reggroup)
+ return (mmx_regnum_p || sse_regnum_p);
+ if (group == float_reggroup)
+ return fp_regnum_p;
+ if (group == general_reggroup)
+ return (!fp_regnum_p && !mmx_regnum_p && !sse_regnum_p);
+ return default_register_reggroup_p (gdbarch, regnum, group);
+}
+
+\f
+static struct gdbarch *
+i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+{
+ struct gdbarch_tdep *tdep;
+ struct gdbarch *gdbarch;
+
+ /* If there is already a candidate, use it. */
+ arches = gdbarch_list_lookup_by_info (arches, &info);
+ if (arches != NULL)
+ return arches->gdbarch;
+
+ /* Allocate space for the new architecture. */
+ tdep = XMALLOC (struct gdbarch_tdep);
+ gdbarch = gdbarch_alloc (&info, tdep);
+
+ /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
+ ready to unwind the PC first (see frame.c:get_prev_frame()). */
+ set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
+
+ /* The i386 default settings don't include the SSE registers.
+ FIXME: kettenis/20020614: They do include the FPU registers for
+ now, which probably is not quite right. */
+ tdep->num_xmm_regs = 0;
+
+ tdep->jb_pc_offset = -1;
+ tdep->struct_return = pcc_struct_return;
+ tdep->sigtramp_start = 0;
+ tdep->sigtramp_end = 0;
+ tdep->sigcontext_addr = NULL;
+ tdep->sc_pc_offset = -1;
+ tdep->sc_sp_offset = -1;
+
+ /* The format used for `long double' on almost all i386 targets is
+ the i387 extended floating-point format. In fact, of all targets
+ in the GCC 2.95 tree, only OSF/1 does it different, and insists
+ on having a `long double' that's not `long' at all. */
+ set_gdbarch_long_double_format (gdbarch, &floatformat_i387_ext);
+
+ /* Although the i387 extended floating-point has only 80 significant
+ bits, a `long double' actually takes up 96, probably to enforce
+ alignment. */
+ set_gdbarch_long_double_bit (gdbarch, 96);
+
+ /* NOTE: tm-i386aix.h, tm-i386bsd.h, tm-i386os9k.h, tm-ptx.h,
+ tm-symmetry.h currently override this. Sigh. */
+ set_gdbarch_num_regs (gdbarch, I386_NUM_GREGS + I386_NUM_FREGS);
+
+ set_gdbarch_sp_regnum (gdbarch, 4); /* %esp */
+ set_gdbarch_fp_regnum (gdbarch, 5); /* %ebp */
+ set_gdbarch_pc_regnum (gdbarch, 8); /* %eip */
+ set_gdbarch_ps_regnum (gdbarch, 9); /* %eflags */
+ set_gdbarch_fp0_regnum (gdbarch, 16); /* %st(0) */
+
+ /* Use the "default" register numbering scheme for stabs and COFF. */
+ set_gdbarch_stab_reg_to_regnum (gdbarch, i386_stab_reg_to_regnum);
+ set_gdbarch_sdb_reg_to_regnum (gdbarch, i386_stab_reg_to_regnum);
+
+ /* Use the DWARF register numbering scheme for DWARF and DWARF 2. */
+ set_gdbarch_dwarf_reg_to_regnum (gdbarch, i386_dwarf_reg_to_regnum);
+ set_gdbarch_dwarf2_reg_to_regnum (gdbarch, i386_dwarf_reg_to_regnum);
+
+ /* We don't define ECOFF_REG_TO_REGNUM, since ECOFF doesn't seem to
+ be in use on any of the supported i386 targets. */
+
+ set_gdbarch_register_name (gdbarch, i386_register_name);
+ set_gdbarch_register_size (gdbarch, 4);
+ set_gdbarch_register_bytes (gdbarch, I386_SIZEOF_GREGS + I386_SIZEOF_FREGS);
+ set_gdbarch_register_type (gdbarch, i386_register_type);
+
+ set_gdbarch_print_float_info (gdbarch, i387_print_float_info);
+
+ set_gdbarch_get_longjmp_target (gdbarch, i386_get_longjmp_target);
+
+ /* Call dummy code. */
+ set_gdbarch_call_dummy_words (gdbarch, NULL);
+ set_gdbarch_sizeof_call_dummy_words (gdbarch, 0);
+
+ set_gdbarch_register_convertible (gdbarch, i386_register_convertible);
+ set_gdbarch_register_convert_to_virtual (gdbarch,
+ i386_register_convert_to_virtual);
+ set_gdbarch_register_convert_to_raw (gdbarch, i386_register_convert_to_raw);
+
+ /* "An argument's size is increased, if necessary, to make it a
+ multiple of [32-bit] words. This may require tail padding,
+ depending on the size of the argument" -- from the x86 ABI. */
+ set_gdbarch_parm_boundary (gdbarch, 32);
+
+ set_gdbarch_extract_return_value (gdbarch, i386_extract_return_value);
+ set_gdbarch_deprecated_push_arguments (gdbarch, i386_push_arguments);
+ set_gdbarch_deprecated_push_return_address (gdbarch, i386_push_return_address);
+ set_gdbarch_deprecated_pop_frame (gdbarch, i386_pop_frame);
+ set_gdbarch_store_return_value (gdbarch, i386_store_return_value);
+ set_gdbarch_extract_struct_value_address (gdbarch,
+ i386_extract_struct_value_address);
+ set_gdbarch_use_struct_convention (gdbarch, i386_use_struct_convention);
+
+ set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, i386_frame_init_saved_regs);
+ set_gdbarch_skip_prologue (gdbarch, i386_skip_prologue);
+
+ /* Stack grows downward. */
+ set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+
+ set_gdbarch_breakpoint_from_pc (gdbarch, i386_breakpoint_from_pc);
+ set_gdbarch_decr_pc_after_break (gdbarch, 1);
+ set_gdbarch_function_start_offset (gdbarch, 0);
+
+ /* The following redefines make backtracing through sigtramp work.
+ They manufacture a fake sigtramp frame and obtain the saved pc in
+ sigtramp from the sigcontext structure which is pushed by the
+ kernel on the user stack, along with a pointer to it. */
+
+ set_gdbarch_frame_args_skip (gdbarch, 8);
+ set_gdbarch_frameless_function_invocation (gdbarch,
+ i386_frameless_function_invocation);
+ set_gdbarch_deprecated_frame_chain (gdbarch, i386_frame_chain);
+ set_gdbarch_deprecated_frame_saved_pc (gdbarch, i386_frame_saved_pc);
+ set_gdbarch_saved_pc_after_call (gdbarch, i386_saved_pc_after_call);
+ set_gdbarch_frame_num_args (gdbarch, i386_frame_num_args);
+ set_gdbarch_pc_in_sigtramp (gdbarch, i386_pc_in_sigtramp);
+
+ /* Wire in the MMX registers. */
+ set_gdbarch_num_pseudo_regs (gdbarch, mmx_num_regs);
+ set_gdbarch_pseudo_register_read (gdbarch, i386_pseudo_register_read);
+ set_gdbarch_pseudo_register_write (gdbarch, i386_pseudo_register_write);
+
+ set_gdbarch_print_insn (gdbarch, i386_print_insn);
+
+ /* Add the i386 register groups. */
+ i386_add_reggroups (gdbarch);
+ set_gdbarch_register_reggroup_p (gdbarch, i386_register_reggroup_p);
+
+ /* Should be using push_dummy_call. */
+ set_gdbarch_deprecated_dummy_write_sp (gdbarch, generic_target_write_sp);
+
+ /* Hook in ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch);
+
+ return gdbarch;
+}
+
+static enum gdb_osabi
+i386_coff_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "coff-go32-exe") == 0
+ || strcmp (bfd_get_target (abfd), "coff-go32") == 0)
+ return GDB_OSABI_GO32;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
+static enum gdb_osabi
+i386_nlm_osabi_sniffer (bfd *abfd)
+{
+ return GDB_OSABI_NETWARE;
}
\f
void
_initialize_i386_tdep (void)
{
- /* Initialize the table saying where each register starts in the
- register file. */
- {
- int i, offset;
-
- offset = 0;
- for (i = 0; i < MAX_NUM_REGS; i++)
- {
- i386_register_byte[i] = offset;
- offset += i386_register_raw_size[i];
- }
- }
-
- /* Initialize the table of virtual register sizes. */
- {
- int i;
-
- for (i = 0; i < MAX_NUM_REGS; i++)
- i386_register_virtual_size[i] = TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (i));
- }
-
- tm_print_insn = gdb_print_insn_i386;
- tm_print_insn_info.mach = bfd_lookup_arch (bfd_arch_i386, 0)->mach;
+ register_gdbarch_init (bfd_arch_i386, i386_gdbarch_init);
/* Add the variable that controls the disassembly flavor. */
{
Set the disassembly flavor, the valid values are \"att\" and \"intel\", \
and the default value is \"att\".",
&setlist);
- new_cmd->function.sfunc = set_disassembly_flavor_sfunc;
add_show_from_set (new_cmd, &showlist);
}
- /* Finally, initialize the disassembly flavor to the default given
- in the disassembly_flavor variable. */
- set_disassembly_flavor ();
+ /* Add the variable that controls the convention for returning
+ structs. */
+ {
+ struct cmd_list_element *new_cmd;
+
+ new_cmd = add_set_enum_cmd ("struct-convention", no_class,
+ valid_conventions,
+ &struct_convention, "\
+Set the convention for returning small structs, valid values \
+are \"default\", \"pcc\" and \"reg\", and the default value is \"default\".",
+ &setlist);
+ add_show_from_set (new_cmd, &showlist);
+ }
+
+ gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
+ i386_coff_osabi_sniffer);
+ gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_nlm_flavour,
+ i386_nlm_osabi_sniffer);
+
+ gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SVR4,
+ i386_svr4_init_abi);
+ gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_GO32,
+ i386_go32_init_abi);
+ gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_NETWARE,
+ i386_nw_init_abi);
+
+ /* Initialize the i386 specific register groups. */
+ i386_init_reggroups ();
}
projects / deliverable / binutils-gdb.git / blobdiff