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| author | Reid Kleckner <rnk@google.com> | 2016-09-15 15:11:49 +0000 |
|---|---|---|
| committer | Reid Kleckner <rnk@google.com> | 2016-09-15 15:11:49 +0000 |
| commit | 8ddf07cc546e12ab199ad5ae7bb22e76cd8127ed (patch) | |
| tree | 6e4ba59e29e24b87c88afa3e913dabb946e33b23 /llvm/docs/Extensions.rst | |
| parent | 9745983a4d4fc578f5491d9927fcc2c6f69165db (diff) | |
| download | bcm5719-llvm-8ddf07cc546e12ab199ad5ae7bb22e76cd8127ed.tar.gz bcm5719-llvm-8ddf07cc546e12ab199ad5ae7bb22e76cd8127ed.zip | |
Document our extension to the COFF .section directive flags
llvm-svn: 281616
Diffstat (limited to 'llvm/docs/Extensions.rst')
| -rw-r--r-- | llvm/docs/Extensions.rst | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/llvm/docs/Extensions.rst b/llvm/docs/Extensions.rst index f7029215c19..6c50abf192f 100644 --- a/llvm/docs/Extensions.rst +++ b/llvm/docs/Extensions.rst @@ -165,6 +165,22 @@ and ``.bar`` is associated to ``.foo``. .section .foo,"bw",discard, "sym" .section .bar,"rd",associative, "sym" +MC supports these flags in the COFF ``.section`` directive: + + - ``b``: BSS section (``IMAGE_SCN_CNT_INITIALIZED_DATA``) + - ``d``: Data section (``IMAGE_SCN_CNT_UNINITIALIZED_DATA``) + - ``n``: Section is not loaded (``IMAGE_SCN_LNK_REMOVE``) + - ``r``: Read-only + - ``s``: Shared section + - ``w``: Writable + - ``x``: Executable section + - ``y``: Not readable + - ``D``: Discardable (``IMAGE_SCN_MEM_DISCARDABLE``) + +These flags are all compatible with gas, with the exception of the ``D`` flag, +which gnu as does not support. For gas compatibility, sections with a name +starting with ".debug" are implicitly discardable. + ELF-Dependent ------------- |
