Commit Graph

8 Commits

Author SHA1 Message Date
Peter Collingbourne 628ec9f193 ELF: Place relro sections after non-relro sections in r/w segment.
This is in preparation for my next change, which will introduce a relro
nobits section. That requires that relro sections appear at the end of the
progbits part of the r/w segment so that the relro nobits section can appear
contiguously.

Because of the amount of churn required in the test suite, I'm making this
change separately.

llvm-svn: 291523
2017-01-10 01:21:30 +00:00
Rafael Espindola 317c339f61 Don't depend on lld creating space for the headers.
Currently lld will implicitly reserve space for the headers. This is
not the case is bfd, where it is the script responsibility to use
SIZEOF_HEADERS. This means that a script not using SIZEOF_HEADERS and
expecting the address of the first section to be 0 would fail with lld.

I am fixing that is the next commit. This one just makes the tests
explicitly use SIZEOF_HEADERS to avoid the dependency on the current
behaviour.

llvm-svn: 282814
2016-09-30 00:06:24 +00:00
Rafael Espindola 2d68f8ade4 Break long line. NFC.
llvm-svn: 282806
2016-09-29 23:02:57 +00:00
Rafael Espindola b6b8f6c308 Revert "Revert "Only restrict order if both sections are in the script.""
This reverts commit r282021, bringing back r282015.

The problem was that the comparison function was not a strict weak
ordering anymore, which this patch fixes.

Original message:

Only restrict order if both sections are in the script.

This matches gold and bfd behavior and is required to handle some scripts.

The script has to assume where PT_LOADs start in order to align that
spot. If we don't allow section it doesn't know about to move to the
middle, we can need more PT_LOADs and those will not be aligned.

llvm-svn: 282035
2016-09-20 22:43:15 +00:00
Rafael Espindola bf04708e11 Revert "Only restrict order if both sections are in the script."
This reverts commit r282015. It broke some bots.

llvm-svn: 282021
2016-09-20 21:28:19 +00:00
Rafael Espindola 145569df64 Only restrict order if both sections are in the script.
This matches gold and bfd behavior and is required to handle some scripts.

The script has to assume where PT_LOADs start in order to align that
spot. If we don't allow section it doesn't know about to move to the
middle, we can need more PT_LOADs and those will not be aligned.

llvm-svn: 282015
2016-09-20 20:54:39 +00:00
Rafael Espindola b45fd70ef1 Disable --rosegment when we have linker scripts.
Linker scripts are responsible for aliging '.'. Since they are
designed for bfd which has no --rosegment, they don't align the RO to
RX transition.

llvm-svn: 281978
2016-09-20 15:22:27 +00:00
Rafael Espindola 10897f1807 Enable merging of SHF_MERGE sections with linker scripts.
This also fixes the related problem of non SHF_MERGE sections with
different flags not being merged.

Fixes pr30355.

llvm-svn: 281338
2016-09-13 14:23:14 +00:00