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| author | H.J. Lu <hjl.tools@gmail.com> | 2020-05-01 21:03:10 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2020-05-01 21:04:01 -0700 |
| commit | 6607bdd99994c834f92fce924abdaea3405f62dc (patch) | |
| tree | 9263654efb733aa5e0fdd7c218ab784c96ae69e0 /gcc/doc | |
| parent | 23c42a01bce298d1578bd0421db1d463739cdf2b (diff) | |
| download | gcc-6607bdd99994c834f92fce924abdaea3405f62dc.zip gcc-6607bdd99994c834f92fce924abdaea3405f62dc.tar.gz gcc-6607bdd99994c834f92fce924abdaea3405f62dc.tar.bz2 | |
Add patch_area_size and patch_area_entry to crtl
Currently patchable area is at the wrong place. It is placed immediately
after function label and before .cfi_startproc. A backend should be able
to add a pseudo patchable area instruction durectly into RTL. This patch
adds patch_area_size and patch_area_entry to crtl so that the patchable
area info is available in RTL passes.
It also limits patch_area_size and patch_area_entry to 65535, which is
a reasonable maximum size for patchable area.
gcc/
PR target/93492
* cfgexpand.c (pass_expand::execute): Set crtl->patch_area_size
and crtl->patch_area_entry.
* emit-rtl.h (rtl_data): Add patch_area_size and patch_area_entry.
* opts.c (common_handle_option): Limit
function_entry_patch_area_size and function_entry_patch_area_start
to USHRT_MAX. Fix a typo in error message.
* varasm.c (assemble_start_function): Use crtl->patch_area_size
and crtl->patch_area_entry.
* doc/invoke.texi: Document the maximum value for
-fpatchable-function-entry.
gcc/c-family/
PR target/93492
* c-attribs.c (handle_patchable_function_entry_attribute): Limit
value to USHRT_MAX (65535).
gcc/testsuite/
PR target/93492
* c-c++-common/patchable_function_entry-error-1.c: New test.
* c-c++-common/patchable_function_entry-error-2.c: Likewise.
* c-c++-common/patchable_function_entry-error-3.c: Likewise.
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 527d362..767d1f0 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -14112,6 +14112,7 @@ If @code{N=0}, no pad location is recorded. The NOP instructions are inserted at---and maybe before, depending on @var{M}---the function entry address, even before the prologue. +The maximum value of @var{N} and @var{M} is 65535. @end table |