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| author | Jakub Jelinek <jakub@redhat.com> | 2004-12-17 15:50:02 +0000 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2004-12-17 15:50:02 +0000 |
| commit | e3070fef41863855bd4fcade884cfda11abedb06 (patch) | |
| tree | a1e4c6daf75abe8a13d92f693f2810602eb754d6 /ld | |
| parent | 9d2be1eec8fda466eebb0da7eefdc5b583649ca3 (diff) | |
| download | gdb-e3070fef41863855bd4fcade884cfda11abedb06.zip gdb-e3070fef41863855bd4fcade884cfda11abedb06.tar.gz gdb-e3070fef41863855bd4fcade884cfda11abedb06.tar.bz2 | |
* ldexp.h (exp_data_seg): Add min_base and maxpagesize fields.
* ldexp.c (fold_binary) <case DATA_SEGMENT_ALIGN>: Initialize them.
* ldlang.c (lang_size_sections): Use them to avoid wasting virtual
address space at DATA_SEGMENT_ALIGN. Fix computation of expected
PT_GNU_RELRO segment end.
Diffstat (limited to 'ld')
| -rw-r--r-- | ld/ChangeLog | 8 | ||||
| -rw-r--r-- | ld/ldexp.c | 2 | ||||
| -rw-r--r-- | ld/ldexp.h | 2 | ||||
| -rw-r--r-- | ld/ldlang.c | 14 |
4 files changed, 21 insertions, 5 deletions
diff --git a/ld/ChangeLog b/ld/ChangeLog index 0844e9a..f5ef3a7 100644 --- a/ld/ChangeLog +++ b/ld/ChangeLog @@ -1,3 +1,11 @@ +2004-12-17 Jakub Jelinek <jakub@redhat.com> + + * ldexp.h (exp_data_seg): Add min_base and maxpagesize fields. + * ldexp.c (fold_binary) <case DATA_SEGMENT_ALIGN>: Initialize them. + * ldlang.c (lang_size_sections): Use them to avoid wasting virtual + address space at DATA_SEGMENT_ALIGN. Fix computation of expected + PT_GNU_RELRO segment end. + 2004-12-14 P.J. Darcy <darcypj@us.ibm.com> * configure.tgt: Add s390x-ibm-tpf support. @@ -435,8 +435,10 @@ fold_binary (etree_type *tree, if (allocation_done == lang_allocating_phase_enum) { exp_data_seg.phase = exp_dataseg_align_seen; + exp_data_seg.min_base = align_n (dot, maxpage); exp_data_seg.base = result.value; exp_data_seg.pagesize = other.value; + exp_data_seg.maxpagesize = maxpage; exp_data_seg.relro_end = 0; } } @@ -100,7 +100,7 @@ extern struct exp_data_seg { exp_dataseg_relro_adjust, exp_dataseg_adjust } phase; - bfd_vma base, relro_end, end, pagesize; + bfd_vma base, min_base, relro_end, end, pagesize, maxpagesize; } exp_data_seg; /* A maps from a segment name to a base address. */ diff --git a/ld/ldlang.c b/ld/ldlang.c index c3a4934..ab34090 100644 --- a/ld/ldlang.c +++ b/ld/ldlang.c @@ -3858,15 +3858,21 @@ lang_size_sections { /* If DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END pair was seen, try to put exp_data_seg.relro on a (common) page boundary. */ - bfd_vma old_base, relro_end; + bfd_vma old_min_base, relro_end, maxpage; exp_data_seg.phase = exp_dataseg_relro_adjust; - old_base = exp_data_seg.base; + old_min_base = exp_data_seg.min_base; + maxpage = exp_data_seg.maxpagesize; exp_data_seg.base += (-exp_data_seg.relro_end & (exp_data_seg.pagesize - 1)); /* Compute the expected PT_GNU_RELRO segment end. */ relro_end = (exp_data_seg.relro_end + exp_data_seg.pagesize - 1) - & (exp_data_seg.pagesize - 1); + & ~(exp_data_seg.pagesize - 1); + if (old_min_base + maxpage < exp_data_seg.base) + { + exp_data_seg.base -= maxpage; + relro_end -= maxpage; + } result = lang_size_sections_1 (s, output_section_statement, prev, fill, dot, relax, check_regions); if (exp_data_seg.relro_end > relro_end) @@ -3888,7 +3894,7 @@ lang_size_sections if (((bfd_vma) 1 << max_alignment_power) < exp_data_seg.pagesize) { if (exp_data_seg.base - (1 << max_alignment_power) - < old_base) + < old_min_base) exp_data_seg.base += exp_data_seg.pagesize; exp_data_seg.base -= (1 << max_alignment_power); result = lang_size_sections_1 (s, output_section_statement, |