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bfd: Fix left shift of negative value. 

This patch fixes all occurences of left-shifting negative constants in C code
which is undefined by the C standard.

bfd/ChangeLog:

        * elf64-ppc.c (ppc64_elf_size_stubs, ppc64_elf_build_stubs): Fix left
        shift of negative value.
        * libbfd.c (safe_read_leb128): Likewise.
        * dwarf2.c (place_sections): Likewise.
        * bfd-in.h (align_power): Likewise.
        * bfd-in2.h (align_power): Likewise.
This commit is contained in:
Dominik Vogt 2015-11-09 17:12:56 +01:00 committed by Andreas Krebbel
parent a5eda10c78
commit 29f628db88
6 changed files with 16 additions and 7 deletions
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9
bfd/ChangeLog
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@ -1,3 +1,12 @@
2015-11-09 Dominik Vogt <vogt@linux.vnet.ibm.com>
* elf64-ppc.c (ppc64_elf_size_stubs, ppc64_elf_build_stubs): Fix left
shift of negative value.
* libbfd.c (safe_read_leb128): Likewise.
* dwarf2.c (place_sections): Likewise.
* bfd-in.h (align_power): Likewise.
* bfd-in2.h (align_power): Likewise.
2015-10-30 Nick Clifton <nickc@redhat.com>
* po/zh_CN.po: Updated (simplified) Chinese translation.

2
bfd/bfd-in.h
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@ -272,7 +272,7 @@ alent;
/* Object and core file sections. */
#define align_power(addr, align) \
(((addr) + ((bfd_vma) 1 << (align)) - 1) & ((bfd_vma) -1 << (align)))
(((addr) + ((bfd_vma) 1 << (align)) - 1) & (-((bfd_vma) 1 << (align))))
typedef struct bfd_section *sec_ptr;

2
bfd/bfd-in2.h
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@ -279,7 +279,7 @@ alent;
/* Object and core file sections. */
#define align_power(addr, align) \
(((addr) + ((bfd_vma) 1 << (align)) - 1) & ((bfd_vma) -1 << (align)))
(((addr) + ((bfd_vma) 1 << (align)) - 1) & (-((bfd_vma) 1 << (align))))
typedef struct bfd_section *sec_ptr;

4
bfd/dwarf2.c
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@ -3354,8 +3354,8 @@ place_sections (bfd *orig_bfd, struct dwarf2_debug *stash)
/* Align the new address to the current section
alignment. */
last_vma = ((last_vma
+ ~((bfd_vma) -1 << sect->alignment_power))
& ((bfd_vma) -1 << sect->alignment_power));
+ ~(-((bfd_vma) 1 << sect->alignment_power)))
& (-((bfd_vma) 1 << sect->alignment_power)));
sect->vma = last_vma;
last_vma += sz;
}

4
bfd/elf64-ppc.c
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@ -12497,7 +12497,7 @@ ppc64_elf_size_stubs (struct bfd_link_info *info)
if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
stub_sec->size = ((stub_sec->size
+ (1 << htab->params->plt_stub_align) - 1)
& (-1 << htab->params->plt_stub_align));
& -(1 << htab->params->plt_stub_align));
for (stub_sec = htab->params->stub_bfd->sections;
stub_sec != NULL;
@ -13021,7 +13021,7 @@ ppc64_elf_build_stubs (struct bfd_link_info *info,
if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
stub_sec->size = ((stub_sec->size
+ (1 << htab->params->plt_stub_align) - 1)
& (-1 << htab->params->plt_stub_align));
& -(1 << htab->params->plt_stub_align));
for (stub_sec = htab->params->stub_bfd->sections;
stub_sec != NULL;

2
bfd/libbfd.c
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@ -1037,7 +1037,7 @@ safe_read_leb128 (bfd *abfd ATTRIBUTE_UNUSED,
*length_return = num_read;
if (sign && (shift < 8 * sizeof (result)) && (byte & 0x40))
result |= (bfd_vma) -1 << shift;
result |= -((bfd_vma) 1 << shift);
return result;
}