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2003-02-25 Alexandre Oliva <aoliva@redhat.com>

Browse Source 
* config/tc-mn10300.c (mn10300_check_fixup): Set GOT_PCREL type
for subtracts from GLOBAL_OFFSET_TABLE that could not be
simplified.
2002-07-18  Alexandre Oliva  <aoliva@redhat.com>
* config/tc-mn10300.c (mn10300_check_fixup): Accept subtracts that
could not be simplified.
(tc_gen_reloc): Turn an absolute fx_subsy into part of fx_offset.
2001-11-04  Alexandre Oliva  <aoliva@redhat.com>
* config/tc-mn10300.h (TC_RELOC_RTSYM_LOC_FIXUP): Don't adjust
BDF_RELOC_MN10300_GOT32.
* config/tc-mn10300.c (mn10300_fix_adjustable): If
TC_RELOC_RTSYM_LOC_FIXUP doesn't hold, it's not adjustable.
2001-05-09  Alexandre Oliva  <aoliva@redhat.com>
* config/tc-mn10300.c (mn10300_parse_name): Don't return a
symbol if we know its value.
2001-05-09  Alexandre Oliva  <aoliva@redhat.com>
* config/tc-mn10300.h (GLOBAL_OFFSET_TABLE_NAME): Remove
duplicate underscore prefix.
2001-05-09  Alexandre Oliva  <aoliva@redhat.com>
* config/tc-mn10300.c (mn10300_parse_name): Store relocation
type in X_md, not X_add_number.  Zero X_add_number.
(mn10300_check_fixup): Extract relocation type from X_md.
* config/tc-mn10300.h: Update comment.
2001-04-14  Alexandre Oliva  <aoliva@redhat.com>
* config/tc-mn10300.h (O_GOTOFF, O_PLT, O_GOT): Replace with...
(O_PIC_reloc): this.
* config/tc-mn10300.c (mn10300_PIC_related_p): Use it.
(mn10300_check_fixup): Likewise.
(mn10300_parse_name): Set X_add_number to relocation type.
* config/tc-mn10300.h (DIFF_EXPR_OK, GLOBAL_OFFSET_TABLE_NAME,
TC_RELOC_RTSYM_LOC_FIXUP, md_parse_name, TC_CONS_FIX_NEW,
O_GOTOFF, O_PLT, O_GOT): Define.
* config/tc-mn10300.c (mn10300_PIC_related_p): New fn.
(mn10300_check_fixup): New fn.
(md_assemble): Call it.  Check for PIC-related relocs.
(mn10300_cons_fix_new): Likewise.  New fn.
(mn10300_end_of_match): New fn.
(mn10300_md_parse_name_cont): New fn.
This commit is contained in:
Alexandre Oliva
2003-07-10 03:20:14 +00:00
parent 03a1283107
commit bf6f0d0c20
3 changed files with 309 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
gas/ChangeLog
View File

@ -1,3 +1,45 @@
2003-07-09 Alexandre Oliva <aoliva@redhat.com>
2003-02-25 Alexandre Oliva <aoliva@redhat.com>
* config/tc-mn10300.c (mn10300_check_fixup): Set GOT_PCREL type
for subtracts from GLOBAL_OFFSET_TABLE that could not be
simplified.
2002-07-18 Alexandre Oliva <aoliva@redhat.com>
* config/tc-mn10300.c (mn10300_check_fixup): Accept subtracts that
could not be simplified.
(tc_gen_reloc): Turn an absolute fx_subsy into part of fx_offset.
2001-11-04 Alexandre Oliva <aoliva@redhat.com>
* config/tc-mn10300.h (TC_RELOC_RTSYM_LOC_FIXUP): Don't adjust
BDF_RELOC_MN10300_GOT32.
* config/tc-mn10300.c (mn10300_fix_adjustable): If
TC_RELOC_RTSYM_LOC_FIXUP doesn't hold, it's not adjustable.
2001-05-09 Alexandre Oliva <aoliva@redhat.com>
* config/tc-mn10300.c (mn10300_parse_name): Don't return a
symbol if we know its value.
2001-05-09 Alexandre Oliva <aoliva@redhat.com>
* config/tc-mn10300.h (GLOBAL_OFFSET_TABLE_NAME): Remove
duplicate underscore prefix.
2001-05-09 Alexandre Oliva <aoliva@redhat.com>
* config/tc-mn10300.c (mn10300_parse_name): Store relocation
type in X_md, not X_add_number. Zero X_add_number.
(mn10300_check_fixup): Extract relocation type from X_md.
* config/tc-mn10300.h: Update comment.
2001-04-14 Alexandre Oliva <aoliva@redhat.com>
* config/tc-mn10300.h (O_GOTOFF, O_PLT, O_GOT): Replace with...
(O_PIC_reloc): this.
* config/tc-mn10300.c (mn10300_PIC_related_p): Use it.
(mn10300_check_fixup): Likewise.
(mn10300_parse_name): Set X_add_number to relocation type.
* config/tc-mn10300.h (DIFF_EXPR_OK, GLOBAL_OFFSET_TABLE_NAME,
TC_RELOC_RTSYM_LOC_FIXUP, md_parse_name, TC_CONS_FIX_NEW,
O_GOTOFF, O_PLT, O_GOT): Define.
* config/tc-mn10300.c (mn10300_PIC_related_p): New fn.
(mn10300_check_fixup): New fn.
(md_assemble): Call it. Check for PIC-related relocs.
(mn10300_cons_fix_new): Likewise. New fn.
(mn10300_end_of_match): New fn.
(mn10300_md_parse_name_cont): New fn.
2003-07-09 Alexandre Oliva <aoliva@redhat.com> 2003-07-09 Alexandre Oliva <aoliva@redhat.com>
2000-05-25 Alexandre Oliva <aoliva@cygnus.com> 2000-05-25 Alexandre Oliva <aoliva@cygnus.com>

244
gas/config/tc-mn10300.c
View File

@ -1219,6 +1219,140 @@ md_begin ()
current_machine = MN103; current_machine = MN103;
} }
static symbolS *GOT_symbol;
static inline int mn10300_check_fixup PARAMS ((struct mn10300_fixup *));
static inline int mn10300_PIC_related_p PARAMS ((symbolS *));
static inline int
mn10300_PIC_related_p (sym)
symbolS *sym;
{
expressionS *exp;
if (! sym)
return 0;
if (sym == GOT_symbol)
return 1;
exp = symbol_get_value_expression (sym);
return (exp->X_op == O_PIC_reloc
|| mn10300_PIC_related_p (exp->X_add_symbol)
|| mn10300_PIC_related_p (exp->X_op_symbol));
}
static inline int
mn10300_check_fixup (fixup)
struct mn10300_fixup *fixup;
{
expressionS *exp = &fixup->exp;
repeat:
switch (exp->X_op)
{
case O_add:
case O_subtract: /* If we're sufficiently unlucky that the label
and the expression that references it happen
to end up in different frags, the subtract
won't be simplified within expression(). */
/* The PIC-related operand must be the first operand of a sum. */
if (exp != &fixup->exp || mn10300_PIC_related_p (exp->X_op_symbol))
return 1;
if (exp->X_add_symbol && exp->X_add_symbol == GOT_symbol)
fixup->reloc = BFD_RELOC_32_GOT_PCREL;
exp = symbol_get_value_expression (exp->X_add_symbol);
goto repeat;
case O_symbol:
if (exp->X_add_symbol && exp->X_add_symbol == GOT_symbol)
fixup->reloc = BFD_RELOC_32_GOT_PCREL;
break;
case O_PIC_reloc:
fixup->reloc = exp->X_md;
exp->X_op = O_symbol;
if (fixup->reloc == BFD_RELOC_32_PLT_PCREL
&& fixup->opindex >= 0
&& (mn10300_operands[fixup->opindex].flags
& MN10300_OPERAND_RELAX))
return 1;
break;
default:
return (mn10300_PIC_related_p (exp->X_add_symbol)
|| mn10300_PIC_related_p (exp->X_op_symbol));
}
return 0;
}
void
mn10300_cons_fix_new (frag, off, size, exp)
fragS *frag;
int off, size;
expressionS *exp;
{
struct mn10300_fixup fixup;
fixup.opindex = -1;
fixup.exp = *exp;
fixup.reloc = BFD_RELOC_UNUSED;
mn10300_check_fixup (&fixup);
if (fixup.reloc == BFD_RELOC_MN10300_GOT32)
switch (size)
{
case 2:
fixup.reloc = BFD_RELOC_MN10300_GOT16;
break;
case 3:
fixup.reloc = BFD_RELOC_MN10300_GOT24;
break;
case 4:
break;
default:
goto error;
}
else if (fixup.reloc == BFD_RELOC_UNUSED)
switch (size)
{
case 1:
fixup.reloc = BFD_RELOC_8;
break;
case 2:
fixup.reloc = BFD_RELOC_16;
break;
case 3:
fixup.reloc = BFD_RELOC_24;
break;
case 4:
fixup.reloc = BFD_RELOC_32;
break;
default:
goto error;
}
else if (size != 4)
{
error:
as_bad (_("unsupported BFD relocation size %u"), size);
fixup.reloc = BFD_RELOC_UNUSED;
}
fix_new_exp (frag, off, size, &fixup.exp, 0, fixup.reloc);
}
void void
md_assemble (str) md_assemble (str)
char *str; char *str;
@ -1748,6 +1882,8 @@ md_assemble (str)
fixups[fc].exp = ex; fixups[fc].exp = ex;
fixups[fc].opindex = *opindex_ptr; fixups[fc].opindex = *opindex_ptr;
fixups[fc].reloc = BFD_RELOC_UNUSED; fixups[fc].reloc = BFD_RELOC_UNUSED;
if (mn10300_check_fixup (& fixups[fc]))
goto error;
++fc; ++fc;
break; break;
} }
@ -2042,7 +2178,11 @@ keep_going:
const struct mn10300_operand *operand; const struct mn10300_operand *operand;
operand = &mn10300_operands[fixups[i].opindex]; operand = &mn10300_operands[fixups[i].opindex];
if (fixups[i].reloc != BFD_RELOC_UNUSED) if (fixups[i].reloc != BFD_RELOC_UNUSED
&& fixups[i].reloc != BFD_RELOC_32_GOT_PCREL
&& fixups[i].reloc != BFD_RELOC_32_GOTOFF
&& fixups[i].reloc != BFD_RELOC_32_PLT_PCREL
&& fixups[i].reloc != BFD_RELOC_MN10300_GOT32)
{ {
reloc_howto_type *reloc_howto; reloc_howto_type *reloc_howto;
int size; int size;
@ -2072,6 +2212,8 @@ keep_going:
fixS *fixP; fixS *fixP;
reloc = BFD_RELOC_NONE; reloc = BFD_RELOC_NONE;
if (fixups[i].reloc != BFD_RELOC_UNUSED)
reloc = fixups[i].reloc;
/* How big is the reloc? Remember SPLIT relocs are /* How big is the reloc? Remember SPLIT relocs are
implicitly 32bits. */ implicitly 32bits. */
if ((operand->flags & MN10300_OPERAND_SPLIT) != 0) if ((operand->flags & MN10300_OPERAND_SPLIT) != 0)
@ -2083,11 +2225,15 @@ keep_going:
/* Is the reloc pc-relative? */ /* Is the reloc pc-relative? */
pcrel = (operand->flags & MN10300_OPERAND_PCREL) != 0; pcrel = (operand->flags & MN10300_OPERAND_PCREL) != 0;
if (reloc != BFD_RELOC_NONE)
pcrel = bfd_reloc_type_lookup (stdoutput, reloc)->pc_relative;
offset = size - (reloc_size + operand->shift) / 8; offset = size - (reloc_size + operand->shift) / 8;
/* Choose a proper BFD relocation type. */ /* Choose a proper BFD relocation type. */
if (pcrel) if (reloc != BFD_RELOC_NONE)
;
else if (pcrel)
{ {
if (reloc_size == 32) if (reloc_size == 32)
reloc = BFD_RELOC_32_PCREL; reloc = BFD_RELOC_32_PCREL;
@ -2153,6 +2299,13 @@ tc_gen_reloc (seg, fixp)
} }
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
if (fixp->fx_subsy
&& S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
{
fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy);
fixp->fx_subsy = 0;
}
if (fixp->fx_addsy && fixp->fx_subsy) if (fixp->fx_addsy && fixp->fx_subsy)
{ {
reloc->sym_ptr_ptr = NULL; reloc->sym_ptr_ptr = NULL;
@ -2368,6 +2521,9 @@ bfd_boolean
mn10300_fix_adjustable (fixp) mn10300_fix_adjustable (fixp)
struct fix *fixp; struct fix *fixp;
{ {
if (! TC_RELOC_RTSYM_LOC_FIXUP (fixp))
return 0;
if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
|| fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
return 0; return 0;
@ -2560,3 +2716,87 @@ set_arch_mach (mach)
current_machine = mach; current_machine = mach;
} }
static inline char * mn10300_end_of_match PARAMS ((char *, char *));
static inline char *
mn10300_end_of_match (cont, what)
char *cont, *what;
{
int len = strlen (what);
if (strncmp (cont, what, strlen (what)) == 0
&& ! is_part_of_name (cont[len]))
return cont + len;
return NULL;
}
int
mn10300_parse_name (name, exprP, nextcharP)
char const *name;
expressionS *exprP;
char *nextcharP;
{
char *next = input_line_pointer;
char *next_end;
int reloc_type;
segT segment;
exprP->X_op_symbol = NULL;
if (strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0)
{
if (! GOT_symbol)
GOT_symbol = symbol_find_or_make (name);
exprP->X_add_symbol = GOT_symbol;
no_suffix:
/* If we have an absolute symbol or a reg,
then we know its value now. */
segment = S_GET_SEGMENT (exprP->X_add_symbol);
if (segment == absolute_section)
{
exprP->X_op = O_constant;
exprP->X_add_number = S_GET_VALUE (exprP->X_add_symbol);
exprP->X_add_symbol = NULL;
}
else if (segment == reg_section)
{
exprP->X_op = O_register;
exprP->X_add_number = S_GET_VALUE (exprP->X_add_symbol);
exprP->X_add_symbol = NULL;
}
else
{
exprP->X_op = O_symbol;
exprP->X_add_number = 0;
}
return 1;
}
exprP->X_add_symbol = symbol_find_or_make (name);
if (*nextcharP != '@')
goto no_suffix;
else if ((next_end = mn10300_end_of_match (next + 1, "GOTOFF")))
reloc_type = BFD_RELOC_32_GOTOFF;
else if ((next_end = mn10300_end_of_match (next + 1, "GOT")))
reloc_type = BFD_RELOC_MN10300_GOT32;
else if ((next_end = mn10300_end_of_match (next + 1, "PLT")))
reloc_type = BFD_RELOC_32_PLT_PCREL;
else
goto no_suffix;
*input_line_pointer = *nextcharP;
input_line_pointer = next_end;
*nextcharP = *input_line_pointer;
*input_line_pointer = '\0';
exprP->X_op = O_PIC_reloc;
exprP->X_add_number = 0;
exprP->X_md = reloc_type;
return 1;
}

25
gas/config/tc-mn10300.h
View File

@ -27,6 +27,31 @@
#error MN10300 support requires BFD_ASSEMBLER #error MN10300 support requires BFD_ASSEMBLER
#endif #endif
#define DIFF_EXPR_OK
#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
((FIX)->fx_r_type != BFD_RELOC_32_PLT_PCREL \
&& (FIX)->fx_r_type != BFD_RELOC_MN10300_GOT32 \
&& (FIX)->fx_r_type != BFD_RELOC_32_GOT_PCREL \
&& ((FIX)->fx_addsy == NULL \
|| (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
&& ! S_IS_WEAK ((FIX)->fx_addsy) \
&& S_IS_DEFINED ((FIX)->fx_addsy) \
&& ! S_IS_COMMON ((FIX)->fx_addsy))))
#define md_parse_name(name, exprP, nextcharP) \
mn10300_parse_name ((name), (exprP), (nextcharP))
int mn10300_parse_name PARAMS ((char const *, expressionS *, char *));
#define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \
mn10300_cons_fix_new ((FRAG), (OFF), (LEN), (EXP))
void mn10300_cons_fix_new PARAMS ((fragS *, int, int, expressionS *));
/* This is used to construct expressions out of @GOTOFF, @PLT and @GOT
symbols. The relocation type is stored in X_md. */
#define O_PIC_reloc O_md1
/* The target BFD architecture. */ /* The target BFD architecture. */
#define TARGET_ARCH bfd_arch_mn10300 #define TARGET_ARCH bfd_arch_mn10300