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| author | Jeff Law <law@redhat.com> | 2017-09-19 22:56:54 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2017-09-19 22:56:54 -0600 |
| commit | ee8f15c69e324cdb1fa553ac14f760f799c425e2 (patch) | |
| tree | 2808704ba1fbdc80b9f1cc9c3962f746872013ef /gcc/toplev.c | |
| parent | 8fca13953b551bb75af0a31d737a297de97676a7 (diff) | |
| download | gcc-ee8f15c69e324cdb1fa553ac14f760f799c425e2.zip gcc-ee8f15c69e324cdb1fa553ac14f760f799c425e2.tar.gz gcc-ee8f15c69e324cdb1fa553ac14f760f799c425e2.tar.bz2 | |
common.opt (-fstack-clash-protection): New option.
* common.opt (-fstack-clash-protection): New option.
* flag-types.h (enum stack_check_type): Note difference between
-fstack-check= and -fstack-clash-protection.
* params.def (PARAM_STACK_CLASH_PROTECTION_GUARD_SIZE): New PARAM.
(PARAM_STACK_CLASH_PROTECTION_PROBE_INTERVAL): Likewise.
* toplev.c (process_options): Issue warnings/errors for cases
not handled with -fstack-clash-protection.
* doc/invoke.texi (-fstack-clash-protection): Document new option.
(-fstack-check): Note additional problem with -fstack-check=generic.
Note that -fstack-check is primarily for Ada and refer users
to -fstack-clash-protection for stack-clash-protection.
Document new params for stack clash protection.
* gcc.dg/stack-check-2.c: New test.
* lib/target-supports.exp
(check_effective_target_supports_stack_clash_protection): New function.
(check_effective_target_frame_pointer_for_non_leaf): Likewise.
(check_effective_target_caller_implicit_probes): Likewise.
From-SVN: r252994
Diffstat (limited to 'gcc/toplev.c')
| -rw-r--r-- | gcc/toplev.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/toplev.c b/gcc/toplev.c index 7d2b8ff..6f48e10 100644 --- a/gcc/toplev.c +++ b/gcc/toplev.c @@ -1605,6 +1605,26 @@ process_options (void) flag_associative_math = 0; } + /* -fstack-clash-protection is not currently supported on targets + where the stack grows up. */ + if (flag_stack_clash_protection && !STACK_GROWS_DOWNWARD) + { + warning_at (UNKNOWN_LOCATION, 0, + "%<-fstack-clash-protection%> is not supported on targets " + "where the stack grows from lower to higher addresses"); + flag_stack_clash_protection = 0; + } + + /* We can not support -fstack-check= and -fstack-clash-protection at + the same time. */ + if (flag_stack_check != NO_STACK_CHECK && flag_stack_clash_protection) + { + warning_at (UNKNOWN_LOCATION, 0, + "%<-fstack-check=%> and %<-fstack-clash_protection%> are " + "mutually exclusive. Disabling %<-fstack-check=%>"); + flag_stack_check = NO_STACK_CHECK; + } + /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */ if (flag_cx_limited_range) flag_complex_method = 0; |