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Groups > linux.kernel > #1192469
| From | Noam Camus <noamc@ezchip.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] fs: heap/bss calculation ignore section above STACK_TOP. |
| Date | 2015-07-26 08:30 +0200 |
| Message-ID | <pQnBE-3lz-3@gated-at.bofh.it> (permalink) |
| References | <pQnBE-3lz-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Noam Camus <noamc@ezchip.com> Today bss/heap is placed above last loaded sections. Current check is only against TASK_SIZE, maybe since most architectures do: #define STACK_TOP TASK_SIZE But this is not true for all of them and a gap between TASK_SIZE and STACK_TOP is possible and may be used for variant purposes. For example we use it for a special physical memory mapping. In such case of section in this gap we skip it for matter of heap/bss calculation. set_brk will never work for such case anyway. Signed-off-by: Noam Camus <noamc@ezchip.com> --- fs/binfmt_elf.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 6b65996..e445886 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -962,6 +962,9 @@ static int load_elf_binary(struct linux_binprm *bprm) k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; + if (k >= STACK_TOP) + continue; + if (k > elf_bss) elf_bss = k; if ((elf_ppnt->p_flags & PF_X) && end_code < k) -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH] fs: heap/bss calculation ignore section above STACK_TOP. Noam Camus <noamc@ezchip.com> - 2015-07-26 08:30 +0200
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