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author | Thomas Schwinge <tschwinge@baylibre.com> | 2024-05-28 23:20:29 +0200 |
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committer | Thomas Schwinge <tschwinge@baylibre.com> | 2024-05-31 15:02:01 +0200 |
commit | d9c90c82d900fdae95df4499bf5f0a4ecb903b53 (patch) | |
tree | d1e4dabb306a38108629d53021fd6b41e5934f93 /libgcc | |
parent | 65dbe0ab7cdaf2aa84b09a74e594f0faacf1945c (diff) | |
download | gcc-d9c90c82d900fdae95df4499bf5f0a4ecb903b53.zip gcc-d9c90c82d900fdae95df4499bf5f0a4ecb903b53.tar.gz gcc-d9c90c82d900fdae95df4499bf5f0a4ecb903b53.tar.bz2 |
nvptx target: Global constructor, destructor support, via nvptx-tools 'ld'
The function attributes 'constructor', 'destructor', and 'init_priority' now
work, as do the C++ features making use of this. Test cases with effective
target 'global_constructor' and 'init_priority' now generally work, and
'check-gcc-c++' test results greatly improve; no more
"sorry, unimplemented: global constructors not supported on this target".
For proper execution test results, this depends on
<https://github.com/SourceryTools/nvptx-tools/commit/96f8fc59a757767b9e98157d95c21e9fef22a93b>
"ld: Global constructor/destructor support".
gcc/
* config/nvptx/nvptx.h: Configure global constructor, destructor
support.
gcc/testsuite/
* gcc.dg/no_profile_instrument_function-attr-1.c: GCC/nvptx is
'NO_DOT_IN_LABEL' but not 'NO_DOLLAR_IN_LABEL', so '$' may apper
in identifiers.
* lib/target-supports.exp
(check_effective_target_global_constructor): Enable for nvptx.
libgcc/
* config/nvptx/crt0.c (__gbl_ctors): New weak function.
(__main): Invoke it.
* config/nvptx/gbl-ctors.c: New.
* config/nvptx/t-nvptx: Configure global constructor, destructor
support.
Diffstat (limited to 'libgcc')
-rw-r--r-- | libgcc/config/nvptx/crt0.c | 12 | ||||
-rw-r--r-- | libgcc/config/nvptx/gbl-ctors.c | 74 | ||||
-rw-r--r-- | libgcc/config/nvptx/t-nvptx | 9 |
3 files changed, 94 insertions, 1 deletions
diff --git a/libgcc/config/nvptx/crt0.c b/libgcc/config/nvptx/crt0.c index e37a6fb..47e8ec4 100644 --- a/libgcc/config/nvptx/crt0.c +++ b/libgcc/config/nvptx/crt0.c @@ -32,6 +32,16 @@ void *__nvptx_stacks[32] __attribute__((shared,nocommon)); /* Likewise for -muniform-simt. */ unsigned __nvptx_uni[32] __attribute__((shared,nocommon)); +/* Global constructor/destructor support. Dummy; if necessary, overridden via + 'gbl-ctors.c'. */ + +extern void __gbl_ctors (void); + +void __attribute__((weak)) +__gbl_ctors (void) +{ +} + extern void __main (int *, int, void **) __attribute__((kernel)); void @@ -47,5 +57,7 @@ __main (int *rval_ptr, int argc, void **argv) __nvptx_stacks[0] = stack + sizeof stack; __nvptx_uni[0] = 0; + __gbl_ctors (); + exit (main (argc, argv)); } diff --git a/libgcc/config/nvptx/gbl-ctors.c b/libgcc/config/nvptx/gbl-ctors.c new file mode 100644 index 0000000..a2ca053 --- /dev/null +++ b/libgcc/config/nvptx/gbl-ctors.c @@ -0,0 +1,74 @@ +/* Global constructor/destructor support + + Copyright (C) 2024 Free Software Foundation, Inc. + + This file is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 3, or (at your option) any + later version. + + This file is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +#include "auto-target.h" + +#ifdef HAVE_STDLIB_H +# include <stdlib.h> +#endif +#include "gbl-ctors.h" + +extern int atexit (void (*function) (void)); + + +/* Handler functions ('static', in contrast to the 'gbl-ctors.h' + prototypes). */ + +static void __static_do_global_ctors (void); + +static void +__static_do_global_ctors (void) +{ + __SIZE_TYPE__ nptrs = (__SIZE_TYPE__) __CTOR_LIST__[0]; + for (__SIZE_TYPE__ i = nptrs; i >= 1; --i) + __CTOR_LIST__[i] (); +} + +static void __static_do_global_dtors (void); + +static void +__static_do_global_dtors (void) +{ + func_ptr *p = __DTOR_LIST__; + ++p; + for (; *p; ++p) + (*p) (); +} + + +/* For nvptx target configurations, override the 'crt0.c' dummy. */ + +extern void __gbl_ctors (void); + +void +__gbl_ctors (void) +{ + __static_do_global_ctors (); + atexit (__static_do_global_dtors); +} + + +/* The following symbol just provides a means for the nvptx-tools 'ld' to + trigger linking in this file. */ + +int __trigger_gbl_ctors; diff --git a/libgcc/config/nvptx/t-nvptx b/libgcc/config/nvptx/t-nvptx index 49fdb55..260ed63 100644 --- a/libgcc/config/nvptx/t-nvptx +++ b/libgcc/config/nvptx/t-nvptx @@ -6,8 +6,10 @@ LIB2ADD=$(srcdir)/config/nvptx/reduction.c \ LIB2ADD += $(srcdir)/c++-minimal/guard.c LIB2ADDEH= -LIB2FUNCS_EXCLUDE=__main +LIB2FUNCS_EXCLUDE= +# Wrapping of 'main'. +LIB2FUNCS_EXCLUDE += __main crt0.o: $(srcdir)/config/nvptx/crt0.c $(crt_compile) -c $< @@ -15,3 +17,8 @@ crt0.o: $(srcdir)/config/nvptx/crt0.c # support it, and it may cause the build to fail, because of alloca usage, for # example. INHIBIT_LIBC_CFLAGS = -Dinhibit_libc + +# Support for global constructors/destructors is implemented via the +# nvptx-tools 'ld' and the following helpers. +LIB2ADD += $(srcdir)/config/nvptx/gbl-ctors.c +LIB2FUNCS_EXCLUDE += _ctors |