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* mips-tdep.c (mips_n32n64_push_dummy_call): Per N32/N64 ABI

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rules do not treat composite types specially.
This commit is contained in:
Maciej W. Rozycki
2007-09-21 15:54:58 +00:00
parent 377caf49a5
commit ab2e1992cf
2 changed files with 15 additions and 8 deletions
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17
gdb/mips-tdep.c
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@@ -2937,12 +2937,14 @@ mips_n32n64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
/* Copy the argument to general registers or the stack in
register-sized pieces. Large arguments are split between
registers and stack. */
/* Note: structs whose size is not a multiple of MIPS64_REGSIZE
are treated specially: Irix cc passes them in registers
where gcc sometimes puts them on the stack. For maximum
compatibility, we will put them in both places. */
int odd_sized_struct = (len > MIPS64_REGSIZE
&& len % MIPS64_REGSIZE != 0);
/* For N32/N64, structs, unions, or other composite types are
treated as a sequence of doublewords, and are passed in integer
or floating point registers as though they were simple scalar
parameters to the extent that they fit, with any excess on the
stack packed according to the normal memory layout of the
object.
The caller does not reserve space for the register arguments;
the callee is responsible for reserving it if required. */
/* Note: Floating-point values that didn't fit into an FP
register are only written to memory. */
while (len > 0)
@@ -2959,8 +2961,7 @@ mips_n32n64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
gdb_assert (argreg > MIPS_LAST_ARG_REGNUM);
/* Write this portion of the argument to the stack. */
if (argreg > MIPS_LAST_ARG_REGNUM
|| odd_sized_struct)
if (argreg > MIPS_LAST_ARG_REGNUM)
{
/* Should shorter than int integer values be
promoted to int before being stored? */