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* Re-add lost change:

Browse Source 
* elf-m10300.c (elf32_mn10300_link_hash_entry): Add new field
        "movm_stack_size".
        (mn10300_elf_relax_section): Include stack space for register saves
        in the imm8 field of a "call" instruction.
        (compute_function_info): Determine how much stack is allocated by
        the movm instruction.  Fix typo.
        (elf32_mn10300_link_hash_newfunc): Initialize movm_stack_size.
This commit is contained in:
Jeff Law 1998-07-23 17:30:54 +00:00
parent f07122bc9e
commit d5394da7ec
2 changed files with 56 additions and 4 deletions
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11
bfd/ChangeLog
View File

@ -1,3 +1,14 @@
Thu Jul 23 11:29:43 1998 Jeffrey A Law (law@cygnus.com)
* Re-add lost change:
* elf-m10300.c (elf32_mn10300_link_hash_entry): Add new field
"movm_stack_size".
(mn10300_elf_relax_section): Include stack space for register saves
in the imm8 field of a "call" instruction.
(compute_function_info): Determine how much stack is allocated by
the movm instruction. Fix typo.
(elf32_mn10300_link_hash_newfunc): Initialize movm_stack_size.
Thu Jul 23 11:38:05 1998 Ian Lance Taylor <ian@cygnus.com>
* elf32-sparc.c (elf_backend_got_header_size): Define as 4.

49
bfd/elf-m10300.c
View File

@ -34,7 +34,9 @@ struct elf32_mn10300_link_hash_entry
/* For function symbols, the size of this function's stack
(if <= 255 bytes). We stuff this into "call" instructions
to this target when it's valid and profitable to do so. */
to this target when it's valid and profitable to do so.
This does not include stack allocated by movm! */
unsigned char stack_size;
/* For function symbols, arguments (if any) for movm instruction
@ -42,6 +44,11 @@ struct elf32_mn10300_link_hash_entry
to the target when it's valid and profitable to do so. */
unsigned char movm_args;
/* For funtion symbols, the amount of stack space that would be allocated
by the movm instruction. This is redundant with movm_args, but we
add it to the hash table to avoid computing it over and over. */
unsigned char movm_stack_size;
/* When set, convert all "call" instructions to this target into "calls"
instructions. */
#define MN10300_CONVERT_CALL_TO_CALLS 0x1
@ -1543,7 +1550,7 @@ mn10300_elf_relax_section (abfd, sec, link_info, again)
if (code == 0xdd)
{
bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
bfd_put_8 (abfd, h->stack_size,
bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
contents + irel->r_offset + 5);
}
}
@ -1658,7 +1665,7 @@ mn10300_elf_relax_section (abfd, sec, link_info, again)
if (code == 0xcd)
{
bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
bfd_put_8 (abfd, h->stack_size,
bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
contents + irel->r_offset + 3);
}
}
@ -2257,6 +2264,32 @@ compute_function_info (abfd, hash, addr, contents)
byte2 = bfd_get_8 (abfd, contents + addr + 1);
}
/* Now figure out how much stack space will be allocated by the movm
instruction. We need this kept separate from the funtion's normal
stack space. */
if (hash->movm_args)
{
/* Space for d2. */
if (hash->movm_args & 0x80)
hash->movm_stack_size += 4;
/* Space for d3. */
if (hash->movm_args & 0x40)
hash->movm_stack_size += 4;
/* Space for a2. */
if (hash->movm_args & 0x20)
hash->movm_stack_size += 4;
/* Space for a3. */
if (hash->movm_args & 0x10)
hash->movm_stack_size += 4;
/* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
if (hash->movm_args & 0x08)
hash->movm_stack_size += 8 * 4;
}
/* Now look for the two stack adjustment variants. */
if (byte1 == 0xf8 && byte2 == 0xfe)
{
@ -2271,9 +2304,16 @@ compute_function_info (abfd, hash, addr, contents)
temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
temp = -temp;
if (temp <= 255)
if (temp < 255)
hash->stack_size = temp;
}
/* If the total stack to be allocated by the call instruction is more
than 255 bytes, then we can't remove the stack adjustment by using
"call" (we might still be able to remove the "movm" instruction. */
if (hash->stack_size + hash->movm_stack_size > 255)
hash->stack_size = 0;
return;
}
@ -2581,6 +2621,7 @@ elf32_mn10300_link_hash_newfunc (entry, table, string)
{
ret->direct_calls = 0;
ret->stack_size = 0;
ret->movm_stack_size = 0;
ret->flags = 0;
ret->movm_args = 0;
}