9 commits

Author	SHA1	Message	Date
Mike Hommey	310043662a	Bug 1470701 - Use run-time page size when changing mapping permissions in elfhack injected code. r=froydnj ... When a binary has a PT_GNU_RELRO segment, the elfhack injected code uses mprotect to add the writable flag to relocated pages before applying relocations, removing it afterwards. To do so, the elfhack program uses the location and size of the PT_GNU_RELRO segment, and adjusts it to be aligned according to the PT_LOAD alignment. The problem here is that the PT_LOAD alignment doesn't necessarily match the actual page alignment, and the resulting mprotect may end up not covering the full extent of what the dynamic linker has protected read-only according to the PT_GNU_RELRO segment. In turn, this can lead to a crash on startup when trying to apply relocations to the still read-only locations. Practically speaking, this doesn't end up being a problem on x86, where the PT_LOAD alignment is usually 4096, which happens to be the page size, but on Debian armhf, it is 64k, while the run time page size can be 4k. --HG-- extra : rebase_source : 5ac7356f685d87c1628727e6c84f7615409c57a5	2018-06-24 09:02:38 +09:00
Mike Hommey	43b0a30fd0	Bug 635961 - Allow elfhack to relocate data under the GNU_RELRO segment. r=froydnj ... --HG-- extra : rebase_source : 873898d5929414b754bf592ab4d60574700b646a	2017-07-11 07:41:07 +09:00
Wes Kocher	5dbd554bdd	Backed out 2 changesets (bug 635961) at developer's request a=backout ... Backed out changeset c56fa9c1eda0 (bug 635961) Backed out changeset ddda63d5366e (bug 635961) MozReview-Commit-ID: I6NxBctFn8e	2017-07-25 17:57:43 -07:00
Mike Hommey	76cfb9c89f	Bug 635961 - Allow elfhack to relocate data under the GNU_RELRO segment. r=froydnj ... --HG-- extra : rebase_source : abbb92ee6a8f317fe80af5bf982c93c8b773a42f	2017-07-11 07:41:07 +09:00
Mike Hommey	3ec8e4f197	Bug 932737 - Change elfhack such that it doesn't require two injection objects. r=nfroyd	2013-11-02 08:47:24 +09:00
Nathan Froyd	036526a684	Bug 925330 - don't use HAVE_64BIT_OS when building elfhack; r=glandium	2013-10-10 09:31:29 -04:00
Mike Hommey	8a3516b805	Bug 898998 - Turn BL into BLX when doing thumb call relocations and the target is ARM. r=nfroyd	2013-07-30 08:57:28 +09:00
Gervase Markham	82ff7027aa	Bug 716478 - update licence to MPL 2.	2012-05-21 12:12:37 +01:00
Mike Hommey	82dcf6256c	Bug 606145 part 2 - Import elfhack code. r=tglek,a=bsmedberg	2011-01-24 09:56:40 +01:00