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* amd64-tdep.c (amd64_return_value): Implement 

RETURN_VALUE_ABI_RETURNS_ADDRESS.
This commit is contained in:
Mark Kettenis 2004-05-09 19:48:25 +00:00
parent e47577ab7b
commit 6fa57a7d27
2 changed files with 24 additions and 4 deletions
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3
gdb/ChangeLog
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@ -1,5 +1,8 @@
2004-05-09 Mark Kettenis <kettenis@gnu.org>
* amd64-tdep.c (amd64_return_value): Implement
RETURN_VALUE_ABI_RETURNS_ADDRESS.
* m68k-tdep.c (m68k_convert_register_p, m68k_register_to_value)
(m68k_value_to_register): New functions.
(m68k_gdbarch_init): Set convert_register_p, register_to_value and

25
gdb/amd64-tdep.c
View File

@ -422,11 +422,28 @@ amd64_return_value (struct gdbarch *gdbarch, struct type *type,
amd64_classify (type, class);
/* 2. If the type has class MEMORY, then the caller provides space
for the return value and passes the address of this storage in
%rdi as if it were the first argument to the function. In
effect, this address becomes a hidden first argument. */
for the return value and passes the address of this storage in
%rdi as if it were the first argument to the function. In effect,
this address becomes a hidden first argument.
On return %rax will contain the address that has been passed in
by the caller in %rdi. */
if (class[0] == AMD64_MEMORY)
return RETURN_VALUE_STRUCT_CONVENTION;
{
/* As indicated by the comment above, the ABI guarantees that we
can always find the return value just after the function has
returned. */
if (readbuf)
{
ULONGEST addr;
regcache_raw_read_unsigned (regcache, AMD64_RAX_REGNUM, &addr);
read_memory (addr, readbuf, TYPE_LENGTH (type));
}
return RETURN_VALUE_ABI_RETURNS_ADDRESS;
}
gdb_assert (class[1] != AMD64_MEMORY);
gdb_assert (len <= 16);