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* reloc-macros.h: Add a comment about the use of the

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END_RELOC_NUMBERS symbol as a sentinel value.
        * arm.h (END_RELOC_NUMBERS): Provide a maximum value.
This commit is contained in:
Nick Clifton 2008-05-21 14:50:07 +00:00
parent 0cd9ab92e5
commit 7c90103bb7
3 changed files with 39 additions and 1 deletions
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9
include/elf/ChangeLog
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@ -1,3 +1,12 @@
2008-05-21 Nick Clifton <nickc@redhat.com>
* reloc-macros.h: Add a comment about the use of the
END_RELOC_NUMBERS symbol as a sentinel value.
2008-05-15 Christophe Lyon <christophe.lyon@st.com>
* arm.h (END_RELOC_NUMBERS): Provide a maximum value.
2008-04-16 David S. Miller <davem@davemloft.net>
* elf/sparc.h (R_SPARC_GOTDATA_HIX22,

3
include/elf/arm.h
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@ -234,7 +234,8 @@ START_RELOC_NUMBERS (elf_arm_reloc_type)
FAKE_RELOC (R_ARM_GOT32, R_ARM_GOT_BREL) /* 32 bit GOT entry. */
FAKE_RELOC (R_ARM_ROSEGREL32, R_ARM_SBREL31) /* ??? */
FAKE_RELOC (R_ARM_AMP_VCALL9, R_ARM_BREL_ADJ) /* Thumb-something. Not used. */
END_RELOC_NUMBERS (R_ARM_max)
END_RELOC_NUMBERS (R_ARM_max = 256)
#ifdef BFD_ARCH_SIZE
/* EABI object attributes. */

28
include/elf/reloc-macros.h
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@ -43,6 +43,34 @@
R_foo_count
};
Note: The value of the symbol defined in the END_RELOC_NUMBERS
macro (R_foo_count in the case of the example above) will be
set to the value of the whichever *_RELOC macro preceeds it plus
one. Therefore if you intend to use the symbol as a sentinel for
the highest valid macro value you should make sure that the
preceeding *_RELOC macro is the highest valid number. ie a
declaration like this:
START_RELOC_NUMBERS (foo)
RELOC_NUMBER (R_foo_NONE, 0)
RELOC_NUMBER (R_foo_32, 1)
FAKE_RELOC (R_foo_illegal, 9)
FAKE_RELOC (R_foo_synonym, 0)
END_RELOC_NUMBERS (R_foo_count)
will result in R_foo_count having a value of 1 (R_foo_synonym + 1)
rather than 10 or 2 as might be expected.
Alternatively you can assign a value to END_RELOC_NUMBERS symbol
explicitly, like this:
START_RELOC_NUMBERS (foo)
RELOC_NUMBER (R_foo_NONE, 0)
RELOC_NUMBER (R_foo_32, 1)
FAKE_RELOC (R_foo_illegal, 9)
FAKE_RELOC (R_foo_synonym, 0)
END_RELOC_NUMBERS (R_foo_count = 2)
If RELOC_MACROS_GEN_FUNC *is* defined, then instead the
following function will be generated: