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Handle case of 32 ABI saving 32 bit registers on stack when target 

has 64 bit ISA.
This commit is contained in:
Andrew Cagney 2000-05-12 09:21:30 +00:00
parent e8b1cae533
commit 47a8d4ba5d
2 changed files with 74 additions and 1 deletions
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7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
Fri May 12 19:13:15 2000 Andrew Cagney <cagney@b1.cygnus.com>
* mips-tdep.c (mips_get_saved_register): New function. Handle
case of 32 ABI saving 32 bit registers on stack when target has 64
bit ISA.
(mips_gdbarch_init): Update.
Fri May 12 14:46:52 2000 Andrew Cagney <cagney@b1.cygnus.com>
* mips-tdep.c (MIPS_EABI): Fix typo. Test for MIPS_ABI_EABI64.

68
gdb/mips-tdep.c
View File

@ -3751,6 +3751,72 @@ mips_coerce_float_to_double (struct type *formal, struct type *actual)
return current_language->la_language == language_c;
}
/* When debugging a 64 MIPS target running a 32 bit ABI, the size of
the register stored on the stack (32) is different to its real raw
size (64). The below ensures that registers are fetched from the
stack using their ABI size and then stored into the RAW_BUFFER
using their raw size.
The alternative to adding this function would be to add an ABI
macro - REGISTER_STACK_SIZE(). */
static void
mips_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
char *raw_buffer;
int *optimized;
CORE_ADDR *addrp;
struct frame_info *frame;
int regnum;
enum lval_type *lval;
{
CORE_ADDR addr;
if (!target_has_registers)
error ("No registers.");
/* Normal systems don't optimize out things with register numbers. */
if (optimized != NULL)
*optimized = 0;
addr = find_saved_register (frame, regnum);
if (addr != 0)
{
if (lval != NULL)
*lval = lval_memory;
if (regnum == SP_REGNUM)
{
if (raw_buffer != NULL)
{
/* Put it back in target format. */
store_address (raw_buffer, REGISTER_RAW_SIZE (regnum),
(LONGEST) addr);
}
if (addrp != NULL)
*addrp = 0;
return;
}
if (raw_buffer != NULL)
{
LONGEST val;
if (regnum < 32)
/* Only MIPS_SAVED_REGSIZE bytes of GP registers are
saved. */
val = read_memory_integer (addr, MIPS_SAVED_REGSIZE);
else
val = read_memory_integer (addr, REGISTER_RAW_SIZE (regnum));
store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), val);
}
}
else
{
if (lval != NULL)
*lval = lval_register;
addr = REGISTER_BYTE (regnum);
if (raw_buffer != NULL)
read_register_gen (regnum, raw_buffer);
}
if (addrp != NULL)
*addrp = addr;
}
static gdbarch_init_ftype mips_gdbarch_init;
static struct gdbarch *
@ -4010,7 +4076,7 @@ mips_gdbarch_init (info, arches)
set_gdbarch_coerce_float_to_double (gdbarch, mips_coerce_float_to_double);
set_gdbarch_frame_chain_valid (gdbarch, func_frame_chain_valid);
set_gdbarch_get_saved_register (gdbarch, default_get_saved_register);
set_gdbarch_get_saved_register (gdbarch, mips_get_saved_register);
if (gdbarch_debug)
{