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2011-05-31 Paul Brook <paul@codesourcery.com>

Browse Source 
Nathan Sidwell  <nathan@codesourcery.com>

	gas/
	* config/tc-arm.c (fix_new_arm): Create an absolute symbol for
	pc-relative fixes to constants.
	* config/tc-arm.h (TC_FORCE_RELOCATATION_ABS): Define.

	ld/testsuite/
	* ld-arm/abs-call-1.d: New.
	* ld-arm/abs-call-1.s: New.
	* ld-arm/arm-elf.exp: Add it.
This commit is contained in:
Paul Brook
2011-05-31 13:40:04 +00:00
parent 12352d3f85
commit 6e7ce2cdd3
7 changed files with 63 additions and 0 deletions
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7
gas/ChangeLog
View File

@ -1,3 +1,10 @@
2011-05-31 Paul Brook <paul@codesourcery.com>
Nathan Sidwell <nathan@codesourcery.com>
* config/tc-arm.c (fix_new_arm): Create an absolute symbol for
pc-relative fixes to constants.
* config/tc-arm.h (TC_FORCE_RELOCATATION_ABS): Define.
2011-05-27 Nick Clifton <nickc@redhat.com>
* config/tc-s390.c (md_begin): Remove unused variable dup_insn.

23
gas/config/tc-arm.c
View File

@ -15434,6 +15434,29 @@ fix_new_arm (fragS * frag,
switch (exp->X_op)
{
case O_constant:
if (pc_rel)
{
/* Create an absolute valued symbol, so we have something to
refer to in the object file. Unfortunately for us, gas's
generic expression parsing will already have folded out
any use of .set foo/.type foo %function that may have
been used to set type information of the target location,
that's being specified symbolically. We have to presume
the user knows what they are doing. */
char name[16 + 8];
symbolS *symbol;
sprintf (name, "*ABS*0x%lx", (unsigned long)exp->X_add_number);
symbol = symbol_find_or_make (name);
S_SET_SEGMENT (symbol, absolute_section);
symbol_set_frag (symbol, &zero_address_frag);
S_SET_VALUE (symbol, exp->X_add_number);
exp->X_op = O_symbol;
exp->X_add_symbol = symbol;
exp->X_add_number = 0;
}
/* FALLTHROUGH */
case O_symbol:
case O_add:
case O_subtract:

6
gas/config/tc-arm.h
View File

@ -192,6 +192,12 @@ void arm_copy_symbol_attributes (symbolS *, symbolS *);
(THUMB_IS_FUNC ((FIX)->fx_addsy) \
|| !SEG_NORMAL (SEG))
#define TC_FORCE_RELOCATION_ABS(FIX) \
(((FIX)->fx_pcrel \
&& (FIX)->fx_r_type != BFD_RELOC_32 \
&& (FIX)->fx_r_type != BFD_RELOC_ARM_GOT32) \
|| TC_FORCE_RELOCATION(FIX))
#define TC_CONS_FIX_NEW cons_fix_new_arm
#define MAX_MEM_ALIGNMENT_BYTES 6

7
ld/testsuite/ChangeLog
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@ -1,3 +1,10 @@
2011-05-31 Paul Brook <paul@codesourcery.com>
Nathan Sidwell <nathan@codesourcery.com>
* ld-arm/abs-call-1.d: New.
* ld-arm/abs-call-1.s: New.
* ld-arm/arm-elf.exp: Add it.
2011-05-31 Paul Brook <paul@codesourcery.com>
* ld-arm/tls-longplt.d: Update expected output.

9
ld/testsuite/ld-arm/abs-call-1.d Normal file
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@ -0,0 +1,9 @@
.*: file format elf32-.*
Disassembly of section .text:
00008000 <arm>:
8000: eb03dffe bl 100000 <foo>
8004: ea03dffd b 100000 <foo>
8008: eb03dffc bl 100000 <foo>

8
ld/testsuite/ld-arm/abs-call-1.s Normal file
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@ -0,0 +1,8 @@
.type foo, %function
.set foo, 0x100000
arm: bl 0x100000
b 0x100000
bl foo

3
ld/testsuite/ld-arm/arm-elf.exp
View File

@ -413,6 +413,9 @@ set armelftests {
{objdump {-s -j.data -j.got} ifunc-16.gd}
{readelf -r ifunc-16.rd}}
"ifunc-16"}
{"abs call" "-T arm.ld" "" {abs-call-1.s}
{{objdump -d abs-call-1.d}}
"abs-call-1"}
}
run_ld_link_tests $armelftests