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| author | H.J. Lu <hjl.tools@gmail.com> | 2020-12-14 20:10:13 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2020-12-16 05:42:08 -0800 |
| commit | 151d1347c99acfcf0f5bcd8caac36dcc7353816d (patch) | |
| tree | 34f662e0f712743b0d1c70f1378193d3b0930573 /gcc/defaults.h | |
| parent | 2a976020603589e897fcfa3276590ef50b489d34 (diff) | |
| download | gcc-151d1347c99acfcf0f5bcd8caac36dcc7353816d.zip gcc-151d1347c99acfcf0f5bcd8caac36dcc7353816d.tar.gz gcc-151d1347c99acfcf0f5bcd8caac36dcc7353816d.tar.bz2 | |
Require .init_array/.fini_array support for SHF_GNU_RETAIN
Since SHF_GNU_RETAIN support doesn't work for crtstuff.c which switches
the output section directly with asm statement:
---
static void __attribute__((used))
__do_global_dtors_aux (void)
{
static _Bool completed;
if (__builtin_expect (completed, 0))
return;
completed = 1;
}
static void __attribute__((__used__))
call___do_global_dtors_aux (void)
{
asm ("\t.section\t.fini");
__do_global_dtors_aux ();
asm ("\t.section\t.text");
}
---
use SHF_GNU_RETAIN only if .init_array/.fini_array section is supported.
gcc/
PR target/98146
* defaults.h (SUPPORTS_SHF_GNU_RETAIN): New.
* varasm.c (get_section): Replace HAVE_GAS_SHF_GNU_RETAIN with
SUPPORTS_SHF_GNU_RETAIN.
(resolve_unique_section): Likewise.
(get_variable_section): Likewise.
(switch_to_section): Likewise.
gcc/testsuite/
PR target/98146
* lib/target-supports.exp
(check_effective_target_R_flag_in_section): Also check
HAVE_INITFINI_ARRAY_SUPPORT != 0.
Diffstat (limited to 'gcc/defaults.h')
| -rw-r--r-- | gcc/defaults.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/defaults.h b/gcc/defaults.h index f1a3862..80a84dd 100644 --- a/gcc/defaults.h +++ b/gcc/defaults.h @@ -286,6 +286,17 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #endif #endif +/* This determines whether or not we support marking sections with + SHF_GNU_RETAIN flag. Also require .init_array/.fini_array section + for constructors and destructors. */ +#ifndef SUPPORTS_SHF_GNU_RETAIN +#if HAVE_GAS_SHF_GNU_RETAIN && HAVE_INITFINI_ARRAY_SUPPORT +#define SUPPORTS_SHF_GNU_RETAIN 1 +#else +#define SUPPORTS_SHF_GNU_RETAIN 0 +#endif +#endif + /* This determines whether or not we support link-once semantics. */ #ifndef SUPPORTS_ONE_ONLY #ifdef MAKE_DECL_ONE_ONLY |