From c68c16371639f360d1b110eacf4b1a28ddb5cf53 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Tue, 29 Sep 2015 06:33:03 -0700 Subject: [PATCH] Adjust the output section size to skip gap fills In objcopy, copy_object calls copy_section to copy contents of input section to output section. When --gap-fill= is used, objcopy extends the size of output sectios to fill gaps between output sections with gap fills. In this case, we adjust the output section size to skip gap files to avoid reading beypond the input section buffer before calling copy_section and restore the output section size after input sections have been copied. binutils/ PR binutils/19005 * objcopy.c (copy_object): Adjust the output section size to skip gap fills between sections when copying from input sections to output sections. ld/testsuite/ PR binutils/19005 * ld-elf/pr19005.d: New file. * ld-elf/pr19005.s: Likewise. * ld-elf/pr19005.t: Likewise. --- binutils/ChangeLog | 7 +++++++ binutils/objcopy.c | 24 ++++++++++++++++++++---- ld/testsuite/ChangeLog | 7 +++++++ ld/testsuite/ld-elf/pr19005.d | 10 ++++++++++ ld/testsuite/ld-elf/pr19005.s | 11 +++++++++++ ld/testsuite/ld-elf/pr19005.t | 6 ++++++ 6 files changed, 61 insertions(+), 4 deletions(-) create mode 100644 ld/testsuite/ld-elf/pr19005.d create mode 100644 ld/testsuite/ld-elf/pr19005.s create mode 100644 ld/testsuite/ld-elf/pr19005.t diff --git a/binutils/ChangeLog b/binutils/ChangeLog index 128cce5..8d2f984 100644 --- a/binutils/ChangeLog +++ b/binutils/ChangeLog @@ -1,3 +1,10 @@ +2015-09-29 H.J. Lu + + PR binutils/19005 + * objcopy.c (copy_object): Adjust the output section size to + skip gap fills between sections when copying from input sections + to output sections. + 2015-09-28 Nick Clifton * po/fr.po: Updated French translation. diff --git a/binutils/objcopy.c b/binutils/objcopy.c index e4cb3e2..c94d515 100644 --- a/binutils/objcopy.c +++ b/binutils/objcopy.c @@ -1640,6 +1640,7 @@ copy_object (bfd *ibfd, bfd *obfd, const bfd_arch_info_type *input_arch) void *dhandle; enum bfd_architecture iarch; unsigned int imach; + unsigned int c, i; if (ibfd->xvec->byteorder != obfd->xvec->byteorder && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN @@ -2071,11 +2072,11 @@ copy_object (bfd *ibfd, bfd *obfd, const bfd_arch_info_type *input_arch) } } - if (bfd_count_sections (obfd) != 0 + c = bfd_count_sections (obfd); + if (c != 0 && (gap_fill_set || pad_to_set)) { asection **set; - unsigned int c, i; /* We must fill in gaps between the sections and/or we must pad the last section to a specified address. We do this by @@ -2083,7 +2084,6 @@ copy_object (bfd *ibfd, bfd *obfd, const bfd_arch_info_type *input_arch) increasing the section sizes as required to fill the gaps. We write out the gap contents below. */ - c = bfd_count_sections (obfd); osections = (asection **) xmalloc (c * sizeof (asection *)); set = osections; bfd_map_over_sections (obfd, get_sections, &set); @@ -2212,7 +2212,24 @@ copy_object (bfd *ibfd, bfd *obfd, const bfd_arch_info_type *input_arch) bfd_map_over_sections (ibfd, copy_relocations_in_section, obfd); /* This has to happen after the symbol table has been set. */ + if (gap_fill_set) + { + /* Adjust the output section size to skip gap fills between + sections. */ + c = bfd_count_sections (obfd); + for (i = 0; i < c; i++) + if (gaps[i] != 0) + osections[i]->size -= gaps[i]; + } bfd_map_over_sections (ibfd, copy_section, obfd); + if (gap_fill_set) + { + /* Restore the output section size for gap fills between + sections. */ + for (i = 0; i < c; i++) + if (gaps[i] != 0) + osections[i]->size += gaps[i]; + } if (add_sections != NULL) { @@ -2264,7 +2281,6 @@ copy_object (bfd *ibfd, bfd *obfd, const bfd_arch_info_type *input_arch) if (gap_fill_set || pad_to_set) { bfd_byte *buf; - int c, i; /* Fill in the gaps. */ if (max_gap > 8192) diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog index 3a6a509..40eb358 100644 --- a/ld/testsuite/ChangeLog +++ b/ld/testsuite/ChangeLog @@ -1,3 +1,10 @@ +2015-09-29 H.J. Lu + + PR binutils/19005 + * ld-elf/pr19005.d: New file. + * ld-elf/pr19005.s: Likewise. + * ld-elf/pr19005.t: Likewise. + 2015-08-11 Peter Zotov PR ld/18759 diff --git a/ld/testsuite/ld-elf/pr19005.d b/ld/testsuite/ld-elf/pr19005.d new file mode 100644 index 0000000..a4df0d3 --- /dev/null +++ b/ld/testsuite/ld-elf/pr19005.d @@ -0,0 +1,10 @@ +#ld: -Tpr19005.t +#objcopy_linked_file: -O binary -j .foo -j .bar --gap-fill=0xff +#objdump: -b binary -s + +#... +Contents of section .data: + 0000 10ffffff ffffffff ffffffff ffffffff ................ + 0010 ffffffff ffffffff ffffffff ffffffff ................ + 0020 20.* +#pass diff --git a/ld/testsuite/ld-elf/pr19005.s b/ld/testsuite/ld-elf/pr19005.s new file mode 100644 index 0000000..8bd860f --- /dev/null +++ b/ld/testsuite/ld-elf/pr19005.s @@ -0,0 +1,11 @@ + .section .foo,"ax",%progbits + .globl _start + .type _start, %function +_start: + .byte 0x10 + .section .bar,"ax",%progbits + .globl aligned + .type aligned, %function + .p2align 5 +aligned: + .byte 0x20 diff --git a/ld/testsuite/ld-elf/pr19005.t b/ld/testsuite/ld-elf/pr19005.t new file mode 100644 index 0000000..0e89e0b --- /dev/null +++ b/ld/testsuite/ld-elf/pr19005.t @@ -0,0 +1,6 @@ +SECTIONS +{ + .foo : { *(.foo) } + .bar : { *(.bar) } + /DISCARD/ : { *(.*) } +} -- 2.7.4