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* config/mips/tm-mips.h (PC_IN_CALL_DUMMY): Removed, the default 

definition in inferior.h is sufficient.
	* mips-tdep.c (mips_pc_in_call_dummy):  Ditto.
	(mips_push_arguments):  Make sure that the stack is aligned to a
	multiple of 8 after the arguments are pushed.
	Structures are always passed by value in the old ABI.
	Adjust argument register value on big endian targets when passing
	a value whose length is less than the register size.
	Write stack arguments with a single write_memory call.
	(mips_pop_frame):  Use frame_saved_regs instead of proc_desc to
	decide which registers have to be restored.
This commit is contained in:
Peter Schauer 1996-12-21 21:01:01 +00:00
parent bb4569b9f6
commit 61d2d19a17
2 changed files with 37 additions and 33 deletions
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14
gdb/ChangeLog
View File

@ -1,4 +1,16 @@
Sat Dec 21 02:08:14 1996 Peter Schauer (pes@regent.e-technik.tu-muenchen.de)
Sat Dec 21 12:57:59 1996 Peter Schauer (pes@regent.e-technik.tu-muenchen.de)
* config/mips/tm-mips.h (PC_IN_CALL_DUMMY): Removed, the default
definition in inferior.h is sufficient.
* mips-tdep.c (mips_pc_in_call_dummy): Ditto.
(mips_push_arguments): Make sure that the stack is aligned to a
multiple of 8 after the arguments are pushed.
Structures are always passed by value in the old ABI.
Adjust argument register value on big endian targets when passing
a value whose length is less than the register size.
Write stack arguments with a single write_memory call.
(mips_pop_frame): Use frame_saved_regs instead of proc_desc to
decide which registers have to be restored.
* irix5-nat.c (fill_gregset): Sign extend registers before
filling in the gregset structure.

56
gdb/mips-tdep.c
View File

@ -875,15 +875,6 @@ setup_arbitrary_frame (argc, argv)
return create_new_frame (argv[0], argv[1]);
}
int
mips_pc_in_call_dummy (pc)
CORE_ADDR pc;
{
return pc >= CALL_DUMMY_ADDRESS ()
&& pc <= CALL_DUMMY_ADDRESS () + DECR_PC_AFTER_BREAK;
}
CORE_ADDR
mips_push_arguments(nargs, args, sp, struct_return, struct_addr)
int nargs;
@ -914,7 +905,7 @@ mips_push_arguments(nargs, args, sp, struct_return, struct_addr)
passed in registers, but that's OK. */
for (argnum = 0; argnum < nargs; argnum++)
len += ROUND_UP (TYPE_LENGTH(VALUE_TYPE(args[argnum])), MIPS_REGSIZE);
sp -= ROUND_UP (len, MIPS_REGSIZE);
sp -= ROUND_UP (len, 8);
/* Initialize the integer and float register pointers. */
argreg = A0_REGNUM;
@ -941,9 +932,9 @@ mips_push_arguments(nargs, args, sp, struct_return, struct_addr)
int len = TYPE_LENGTH (arg_type);
enum type_code typecode = TYPE_CODE (arg_type);
/* The EABI passes structures that fit in a register by value.
In all other cases, pass the structure by reference. */
if (typecode == TYPE_CODE_STRUCT && (!MIPS_EABI || len > MIPS_REGSIZE))
/* The EABI passes structures that do not fit in a register by
reference. In all other cases, pass the structure by value. */
if (typecode == TYPE_CODE_STRUCT && MIPS_EABI && len > MIPS_REGSIZE)
{
store_address (valbuf, MIPS_REGSIZE, VALUE_ADDRESS (arg));
len = MIPS_REGSIZE;
@ -995,11 +986,18 @@ mips_push_arguments(nargs, args, sp, struct_return, struct_addr)
while (len > 0)
{
int partial_len = len < MIPS_REGSIZE ? len : MIPS_REGSIZE;
CORE_ADDR regval = extract_address (val, partial_len);
if (argreg <= MIPS_LAST_ARG_REGNUM)
{
/* It's a simple argument being passed in a general register. */
CORE_ADDR regval = extract_address (val, partial_len);
/* It's a simple argument being passed in a general
register.
If the argument length is smaller than the register size,
we have to adjust the argument on big endian targets. */
if (TARGET_BYTE_ORDER == BIG_ENDIAN
&& partial_len < MIPS_REGSIZE)
regval <<= ((MIPS_REGSIZE - partial_len) * TARGET_CHAR_BIT);
write_register (argreg, regval);
argreg++;
@ -1011,12 +1009,10 @@ mips_push_arguments(nargs, args, sp, struct_return, struct_addr)
}
else
{
/* Promote this portion of the argument to a register-sized
chunk before pushing it on the stack. */
char partial_buf[MIPS_REGSIZE];
store_address (partial_buf, MIPS_REGSIZE, regval);
write_memory (sp + stack_offset, partial_buf, MIPS_REGSIZE);
stack_offset += MIPS_REGSIZE;
/* Write this portion of the argument to the stack. */
partial_len = len;
write_memory (sp + stack_offset, val, partial_len);
stack_offset += ROUND_UP (partial_len, MIPS_REGSIZE);
}
len -= partial_len;
@ -1135,17 +1131,13 @@ mips_pop_frame()
write_register (PC_REGNUM, FRAME_SAVED_PC(frame));
if (frame->saved_regs == NULL)
mips_find_saved_regs (frame);
if (proc_desc)
for (regnum = 0; regnum < NUM_REGS; regnum++)
{
for (regnum = MIPS_NUMREGS; --regnum >= 0; )
if (PROC_REG_MASK(proc_desc) & (1 << regnum))
write_register (regnum,
read_memory_integer (frame->saved_regs->regs[regnum],
MIPS_REGSIZE));
for (regnum = MIPS_NUMREGS; --regnum >= 0; )
if (PROC_FREG_MASK(proc_desc) & (1 << regnum))
write_register (regnum + FP0_REGNUM,
read_memory_integer (frame->saved_regs->regs[regnum + FP0_REGNUM], MIPS_REGSIZE));
if (regnum != SP_REGNUM && regnum != PC_REGNUM
&& frame->saved_regs->regs[regnum])
write_register (regnum,
read_memory_integer (frame->saved_regs->regs[regnum],
MIPS_REGSIZE));
}
write_register (SP_REGNUM, new_sp);
flush_cached_frames ();