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Move some of the MIPS n32 ABI configuration options into the mips 

multi-arch vector.
This commit is contained in:
Andrew Cagney 2000-05-08 02:53:04 +00:00
parent 327fce13c5
commit d929b26ff1
3 changed files with 139 additions and 54 deletions
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30
gdb/ChangeLog
View File

@ -1,3 +1,33 @@
Mon May 8 11:19:47 2000 Andrew Cagney <cagney@b1.cygnus.com>
* mips-tdep.c (size_auto, size_32, size_64, size_enums): Rename
saved_gpreg_size_auto, saved_gpreg_size_32, saved_gpreg_size_64
and saved_gpreg_size_enums.
(mips_stack_argsize): Update. Cleanup.
* mips-tdep.c (STACK_ARGSIZE): Delete macro. Replaced by
MIPS_STACK_ARGSIZE.
(MIPS_NABI32): Delete macro. Replaced by
MIPS_REGS_HAVE_STACK_HOME_P.
(mips_push_arguments): Update.
(mips_push_arguments): Replace check for MIPS_EABI or MIPS_NABI32
with test for MIPS_REGS_HAVE_STACK_HOME_P.
(MIPS_REGS_HAVE_STACK_HOME_P): Define. Provide non- multi-arch
default.
(struct gdbarch_tdep): Add mips_regs_have_stack_home_p and
mips_default_stack_argsize.
(MIPS_STACK_ARGSIZE): Define as mips_stack_argsize.
(mips_stack_argsize_string): New static variable.
(mips_stack_argsize): New function, handle default case.
(__initialize_mips_tdep): Add command ``set mips stack-arg-size''
implemented as an enum using size_auto et.al.
(mips_gdbarch_init): Initialize mips_default_stack_argsize and
mips_regs_have_stack_home_p.
* config/mips/tm-irix5.h (MIPS_DEFAULT_SAVED_REGSIZE): Define as 8
for n32.
(MIPS_REGS_HAVE_STACK_HOME_P): Define as 0 for n32.
Mon May 8 00:49:32 2000 Andrew Cagney <cagney@b1.cygnus.com>
* procfs.c (PROCFS_TRACE): Delete definition.

15
gdb/config/mips/tm-irix5.h
View File

@ -1,5 +1,5 @@
/* Target machine description for SGI Iris under Irix 5, for GDB.
Copyright 1990, 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
Copyright 1990-1993, 1995, 2000 Free Software Foundation, Inc.
This file is part of GDB.
@ -20,6 +20,10 @@
#include "mips/tm-irix3.h"
/* FIXME: cagney/2000-04-04: Testing the _MIPS_SIM_NABI32 and
_MIPS_SIM in a tm-*.h file is simply wrong! Those are
host-dependant macros (provided by /usr/include) and stop any
chance of the target being cross compiled */
#if defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32
/*
* Irix 6 (n32 ABI) has 32-bit GP regs and 64-bit FP regs
@ -46,6 +50,15 @@
#undef MIPS_LAST_ARG_REGNUM
#define MIPS_LAST_ARG_REGNUM 11 /* N32 uses R4 through R11 for args */
/* MIPS_STACK_ARGSIZE -- how many bytes does a pushed function arg take
up on the stack? For the n32 ABI, eight bytes are reserved for each
register. Like MIPS_SAVED_REGSIZE but different. */
#define MIPS_DEFAULT_STACK_ARGSIZE 8
/* N32 does not reserve home space for registers used to carry
parameters. */
#define MIPS_REGS_HAVE_HOME_P 0
#endif /* N32 */

148
gdb/mips-tdep.c
View File

@ -46,22 +46,21 @@ struct frame_extra_info
int num_args;
};
/* We allow the user to override MIPS_SAVED_REGSIZE, so define
the subcommand enum settings allowed. */
static char saved_gpreg_size_auto[] = "auto";
static char saved_gpreg_size_32[] = "32";
static char saved_gpreg_size_64[] = "64";
/* Various MIPS ISA options (related to stack analysis) can be
overridden dynamically. Establish an enum/array for managing
them. */
static char *saved_gpreg_size_enums[] = {
saved_gpreg_size_auto,
saved_gpreg_size_32,
saved_gpreg_size_64,
static char size_auto[] = "auto";
static char size_32[] = "32";
static char size_64[] = "64";
static char *size_enums[] = {
size_auto,
size_32,
size_64,
0
};
/* The current (string) value of saved_gpreg_size. */
static char *mips_saved_regsize_string = saved_gpreg_size_auto;
/* Some MIPS boards don't support floating point while others only
support single-precision floating-point operations. See also
FP_REGISTER_DOUBLE. */
@ -80,12 +79,6 @@ static int mips_fpu_type_auto = 1;
static enum mips_fpu_type mips_fpu_type = MIPS_DEFAULT_FPU_TYPE;
#define MIPS_FPU_TYPE mips_fpu_type
#ifndef MIPS_DEFAULT_SAVED_REGSIZE
#define MIPS_DEFAULT_SAVED_REGSIZE MIPS_REGSIZE
#endif
#define MIPS_SAVED_REGSIZE (mips_saved_regsize())
/* Do not use "TARGET_IS_MIPS64" to test the size of floating point registers */
#ifndef FP_REGISTER_DOUBLE
#define FP_REGISTER_DOUBLE (REGISTER_VIRTUAL_SIZE(FP0_REGNUM) == 8)
@ -104,6 +97,8 @@ struct gdbarch_tdep
int mips_last_fp_arg_regnum;
int mips_default_saved_regsize;
int mips_fp_register_double;
int mips_regs_have_home_p;
int mips_default_stack_argsize;
};
#if GDB_MULTI_ARCH
@ -126,11 +121,30 @@ struct gdbarch_tdep
#define MIPS_FPU_TYPE (gdbarch_tdep (current_gdbarch)->mips_fpu_type)
#endif
/* Return the currently configured (or set) saved register size. */
#if GDB_MULTI_ARCH
#undef MIPS_DEFAULT_SAVED_REGSIZE
#define MIPS_DEFAULT_SAVED_REGSIZE (gdbarch_tdep (current_gdbarch)->mips_default_saved_regsize)
#elif !defined (MIPS_DEFAULT_SAVED_REGSIZE)
#define MIPS_DEFAULT_SAVED_REGSIZE MIPS_REGSIZE
#endif
static char *mips_saved_regsize_string = size_auto;
#define MIPS_SAVED_REGSIZE (mips_saved_regsize())
static unsigned int
mips_saved_regsize ()
{
if (mips_saved_regsize_string == size_auto)
return MIPS_DEFAULT_SAVED_REGSIZE;
else if (mips_saved_regsize_string == size_64)
return 8;
else /* if (mips_saved_regsize_string == size_32) */
return 4;
}
/* Indicate that the ABI makes use of double-precision registers
provided by the FPU (rather than combining pairs of registers to
form double-precision values). Do not use "TARGET_IS_MIPS64" to
@ -141,6 +155,43 @@ struct gdbarch_tdep
#define FP_REGISTER_DOUBLE (gdbarch_tdep (current_gdbarch)->mips_fp_register_double)
#endif
/* Does the caller allocate a ``home'' for each register used in the
function call? The N32 ABI and MIPS_EABI do not, the others do. */
#if GDB_MULTI_ARCH
#undef MIPS_REGS_HAVE_HOME_P
#define MIPS_REGS_HAVE_HOME_P (gdbarch_tdep (current_gdbarch)->mips_regs_have_home_p)
#elif !defined (MIPS_REGS_HAVE_HOME_P)
#define MIPS_REGS_HAVE_HOME_P (!MIPS_EABI)
#endif
/* The amount of space reserved on the stack for registers. This is
different to MIPS_SAVED_REGSIZE as it determines the alignment of
data allocated after the registers have run out. */
#if GDB_MULTI_ARCH
#undef MIPS_DEFAULT_STACK_ARGSIZE
#define MIPS_DEFAULT_STACK_ARGSIZE (gdbarch_tdep (current_gdbarch)->mips_default_statck_argsize)
#elif !defined (MIPS_DEFAULT_STACK_ARGSIZE)
#define MIPS_DEFAULT_STACK_ARGSIZE (MIPS_DEFAULT_SAVED_REGSIZE)
#endif
#define MIPS_STACK_ARGSIZE (mips_stack_argsize ())
static char *mips_stack_argsize_string = size_auto;
static unsigned int
mips_stack_argsize (void)
{
if (mips_stack_argsize_string == size_auto)
return MIPS_DEFAULT_STACK_ARGSIZE;
else if (mips_stack_argsize_string == size_64)
return 8;
else /* if (mips_stack_argsize_string == size_32) */
return 4;
}
#define VM_MIN_ADDRESS (CORE_ADDR)0x400000
@ -326,19 +377,6 @@ mips_print_extra_frame_info (fi)
paddr_d (fi->extra_info->proc_desc->pdr.frameoffset));
}
/* Return the currently configured (or set) saved register size */
static unsigned int
mips_saved_regsize ()
{
if (mips_saved_regsize_string == saved_gpreg_size_auto)
return MIPS_DEFAULT_SAVED_REGSIZE;
else if (mips_saved_regsize_string == saved_gpreg_size_64)
return 8;
else /* if (mips_saved_regsize_string == saved_gpreg_size_32) */
return 4;
}
/* Convert between RAW and VIRTUAL registers. The RAW register size
defines the remote-gdb packet. */
@ -1993,20 +2031,6 @@ setup_arbitrary_frame (argc, argv)
return create_new_frame (argv[0], argv[1]);
}
/*
* STACK_ARGSIZE -- how many bytes does a pushed function arg take up on the stack?
*
* For n32 ABI, eight.
* For all others, he same as the size of a general register.
*/
#if defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32
#define MIPS_NABI32 1
#define STACK_ARGSIZE 8
#else
#define MIPS_NABI32 0
#define STACK_ARGSIZE MIPS_SAVED_REGSIZE
#endif
CORE_ADDR
mips_push_arguments (nargs, args, sp, struct_return, struct_addr)
int nargs;
@ -2158,15 +2182,15 @@ mips_push_arguments (nargs, args, sp, struct_return, struct_addr)
int longword_offset = 0;
if (TARGET_BYTE_ORDER == BIG_ENDIAN)
{
if (STACK_ARGSIZE == 8 &&
if (MIPS_STACK_ARGSIZE == 8 &&
(typecode == TYPE_CODE_INT ||
typecode == TYPE_CODE_PTR ||
typecode == TYPE_CODE_FLT) && len <= 4)
longword_offset = STACK_ARGSIZE - len;
longword_offset = MIPS_STACK_ARGSIZE - len;
else if ((typecode == TYPE_CODE_STRUCT ||
typecode == TYPE_CODE_UNION) &&
TYPE_LENGTH (arg_type) < STACK_ARGSIZE)
longword_offset = STACK_ARGSIZE - len;
TYPE_LENGTH (arg_type) < MIPS_STACK_ARGSIZE)
longword_offset = MIPS_STACK_ARGSIZE - len;
}
write_memory (sp + stack_offset + longword_offset,
@ -2223,9 +2247,8 @@ mips_push_arguments (nargs, args, sp, struct_return, struct_addr)
stack offset does not get incremented until after
we have used up the 8 parameter registers. */
if (!(MIPS_EABI || MIPS_NABI32) ||
argnum >= 8)
stack_offset += ROUND_UP (partial_len, STACK_ARGSIZE);
if (MIPS_REGS_HAVE_HOME_P || argnum >= 8)
stack_offset += ROUND_UP (partial_len, MIPS_STACK_ARGSIZE);
}
}
}
@ -3809,6 +3832,7 @@ mips_gdbarch_init (info, arches)
set_gdbarch_long_long_bit (gdbarch, 64);
break;
}
tdep->mips_default_stack_argsize = tdep->mips_default_saved_regsize;
/* FIXME: jlarmour/2000-04-07: There *is* a flag EF_MIPS_32BIT_MODE
that could indicate -gp32 BUT gas/config/tc-mips.c contains the
@ -3873,6 +3897,8 @@ mips_gdbarch_init (info, arches)
tdep->mips_last_arg_regnum = 11;
/* EABI uses F12 through F19 for args */
tdep->mips_last_fp_arg_regnum = FP0_REGNUM + 19;
/* EABI does not reserve home space for registers */
tdep->mips_regs_have_home_p = 0;
}
else
{
@ -3880,6 +3906,8 @@ mips_gdbarch_init (info, arches)
tdep->mips_last_arg_regnum = 7;
/* old ABI uses F12 through F15 for args */
tdep->mips_last_fp_arg_regnum = FP0_REGNUM + 15;
/* Old ABI reserves home space for registers */
tdep->mips_regs_have_home_p = 1;
}
/* enable/disable the MIPS FPU */
@ -4004,7 +4032,7 @@ _initialize_mips_tdep ()
/* Allow the user to override the saved register size. */
add_show_from_set (add_set_enum_cmd ("saved-gpreg-size",
class_obscure,
saved_gpreg_size_enums,
size_enums,
(char *) &mips_saved_regsize_string, "\
Set size of general purpose registers saved on the stack.\n\
This option can be set to one of:\n\
@ -4016,6 +4044,20 @@ This option can be set to one of:\n\
&setmipscmdlist),
&showmipscmdlist);
/* Allow the user to override the argument stack size. */
add_show_from_set (add_set_enum_cmd ("stack-arg-size",
class_obscure,
size_enums,
(char *) &mips_stack_argsize_string, "\
Set the amount of stack space reserved for each argument.\n\
This option can be set to one of:\n\
32 - Force GDB to allocate 32-bit chunks per argument\n\
64 - Force GDB to allocate 64-bit chunks per argument\n\
auto - Allow GDB to determine the correct setting from the current\n\
target and executable (default)",
&setmipscmdlist),
&showmipscmdlist);
/* Let the user turn off floating point and set the fence post for
heuristic_proc_start. */