This patch provides a new handler MD_ARCH_FRAME_STATE_T to hide an
architecture-specific structure containing CIE and FDE data related
to DWARF architecture extensions.
Hiding the architecture-specific attributes behind a handler has the
following benefits:
1. isolating those data from the generic ones in _Unwind_FrameState
2. avoiding casts to custom types.
3. preserving typing information when debugging with GDB, and so
facilitating their printing.
This approach required to add a new header md-unwind-def.h included at
the top of libgcc/unwind-dw2.h, and redirecting to the corresponding
architecture header via a symbolic link.
An obvious drawback is the increase in complexity with macros, and
headers. It also caused a split of architecture definitions between
md-unwind-def.h (types definitions used in unwind-dw2.h) and
md-unwind.h (local types definitions and handlers implementations).
The naming of md-unwind.h with .h extension is a bit misleading as
the file is only included in the middle of unwind-dw2.c. Changing
this naming would require modification of others backends, which I
prefered to abstain from. Overall the benefits are worth the added
complexity from my perspective.
libgcc/ChangeLog:
* Makefile.in: New target for symbolic link to md-unwind-def.h
* config.host: New parameter md_unwind_def_header. Set it to
aarch64/aarch64-unwind-def.h for AArch64 targets, or no-unwind.h
by default.
* config/aarch64/aarch64-unwind.h
(aarch64_pointer_auth_key): Move to aarch64-unwind-def.h
(aarch64_cie_aug_handler): Update.
(aarch64_arch_extension_frame_init): Update.
(aarch64_demangle_return_addr): Update.
* configure.ac: New substitute variable md_unwind_def_header.
* unwind-dw2.h (defined): MD_ARCH_FRAME_STATE_T.
* config/aarch64/aarch64-unwind-def.h: New file.
* configure: Regenerate.
* config/no-unwind.h: Updated comment
This patch adds the strub attribute for function and variable types,
command-line options, passes and adjustments to implement it,
documentation, and tests.
Stack scrubbing is implemented in a machine-independent way: functions
with strub enabled are modified so that they take an extra stack
watermark argument, that they update with their stack use, and the
caller can then zero it out once it regains control, whether by return
or exception. There are two ways to go about it: at-calls, that
modifies the visible interface (signature) of the function, and
internal, in which the body is moved to a clone, the clone undergoes
the interface change, and the function becomes a wrapper, preserving
its original interface, that calls the clone and then clears the stack
used by it.
Variables can also be annotated with the strub attribute, so that
functions that read from them get stack scrubbing enabled implicitly,
whether at-calls, for functions only usable within a translation unit,
or internal, for functions whose interfaces must not be modified.
There is a strict mode, in which functions that have their stack
scrubbed can only call other functions with stack-scrubbing
interfaces, or those explicitly marked as callable from strub
contexts, so that an entire call chain gets scrubbing, at once or
piecemeal depending on optimization levels. In the default mode,
relaxed, this requirement is not enforced by the compiler.
The implementation adds two IPA passes, one that assigns strub modes
early on, another that modifies interfaces and adds calls to the
builtins that jointly implement stack scrubbing. Another builtin,
that obtains the stack pointer, is added for use in the implementation
of the builtins, whether expanded inline or called in libgcc.
There are new command-line options to change operation modes and to
force the feature disabled; it is enabled by default, but it has no
effect and is implicitly disabled if the strub attribute is never
used. There are also options meant to use for testing the feature,
enabling different strubbing modes for all (viable) functions.
for gcc/ChangeLog
* Makefile.in (OBJS): Add ipa-strub.o.
(GTFILES): Add ipa-strub.cc.
* builtins.def (BUILT_IN_STACK_ADDRESS): New.
(BUILT_IN___STRUB_ENTER): New.
(BUILT_IN___STRUB_UPDATE): New.
(BUILT_IN___STRUB_LEAVE): New.
* builtins.cc: Include ipa-strub.h.
(STACK_STOPS, STACK_UNSIGNED): Define.
(expand_builtin_stack_address): New.
(expand_builtin_strub_enter): New.
(expand_builtin_strub_update): New.
(expand_builtin_strub_leave): New.
(expand_builtin): Call them.
* common.opt (fstrub=*): New options.
* doc/extend.texi (strub): New type attribute.
(__builtin_stack_address): New function.
(Stack Scrubbing): New section.
* doc/invoke.texi (-fstrub=*): New options.
(-fdump-ipa-*): New passes.
* gengtype-lex.l: Ignore multi-line pp-directives.
* ipa-inline.cc: Include ipa-strub.h.
(can_inline_edge_p): Test strub_inlinable_to_p.
* ipa-split.cc: Include ipa-strub.h.
(execute_split_functions): Test strub_splittable_p.
* ipa-strub.cc, ipa-strub.h: New.
* passes.def: Add strub_mode and strub passes.
* tree-cfg.cc (gimple_verify_flow_info): Note on debug stmts.
* tree-pass.h (make_pass_ipa_strub_mode): Declare.
(make_pass_ipa_strub): Declare.
(make_pass_ipa_function_and_variable_visibility): Fix
formatting.
* tree-ssa-ccp.cc (optimize_stack_restore): Keep restores
before strub leave.
* attribs.cc: Include ipa-strub.h.
(decl_attributes): Support applying attributes to function
type, rather than pointer type, at handler's request.
(comp_type_attributes): Combine strub_comptypes and target
comp_type results.
* doc/tm.texi.in (TARGET_STRUB_USE_DYNAMIC_ARRAY): New.
(TARGET_STRUB_MAY_USE_MEMSET): New.
* doc/tm.texi: Rebuilt.
* cgraph.h (symtab_node::reset): Add preserve_comdat_group
param, with a default.
* cgraphunit.cc (symtab_node::reset): Use it.
for gcc/c-family/ChangeLog
* c-attribs.cc: Include ipa-strub.h.
(handle_strub_attribute): New.
(c_common_attribute_table): Add strub.
for gcc/ada/ChangeLog
* gcc-interface/trans.cc: Include ipa-strub.h.
(gigi): Make internal decls for targets of compiler-generated
calls strub-callable too.
(build_raise_check): Likewise.
* gcc-interface/utils.cc: Include ipa-strub.h.
(handle_strub_attribute): New.
(gnat_internal_attribute_table): Add strub.
for gcc/testsuite/ChangeLog
* c-c++-common/strub-O0.c: New.
* c-c++-common/strub-O1.c: New.
* c-c++-common/strub-O2.c: New.
* c-c++-common/strub-O2fni.c: New.
* c-c++-common/strub-O3.c: New.
* c-c++-common/strub-O3fni.c: New.
* c-c++-common/strub-Og.c: New.
* c-c++-common/strub-Os.c: New.
* c-c++-common/strub-all1.c: New.
* c-c++-common/strub-all2.c: New.
* c-c++-common/strub-apply1.c: New.
* c-c++-common/strub-apply2.c: New.
* c-c++-common/strub-apply3.c: New.
* c-c++-common/strub-apply4.c: New.
* c-c++-common/strub-at-calls1.c: New.
* c-c++-common/strub-at-calls2.c: New.
* c-c++-common/strub-defer-O1.c: New.
* c-c++-common/strub-defer-O2.c: New.
* c-c++-common/strub-defer-O3.c: New.
* c-c++-common/strub-defer-Os.c: New.
* c-c++-common/strub-internal1.c: New.
* c-c++-common/strub-internal2.c: New.
* c-c++-common/strub-parms1.c: New.
* c-c++-common/strub-parms2.c: New.
* c-c++-common/strub-parms3.c: New.
* c-c++-common/strub-relaxed1.c: New.
* c-c++-common/strub-relaxed2.c: New.
* c-c++-common/strub-short-O0-exc.c: New.
* c-c++-common/strub-short-O0.c: New.
* c-c++-common/strub-short-O1.c: New.
* c-c++-common/strub-short-O2.c: New.
* c-c++-common/strub-short-O3.c: New.
* c-c++-common/strub-short-Os.c: New.
* c-c++-common/strub-strict1.c: New.
* c-c++-common/strub-strict2.c: New.
* c-c++-common/strub-tail-O1.c: New.
* c-c++-common/strub-tail-O2.c: New.
* c-c++-common/torture/strub-callable1.c: New.
* c-c++-common/torture/strub-callable2.c: New.
* c-c++-common/torture/strub-const1.c: New.
* c-c++-common/torture/strub-const2.c: New.
* c-c++-common/torture/strub-const3.c: New.
* c-c++-common/torture/strub-const4.c: New.
* c-c++-common/torture/strub-data1.c: New.
* c-c++-common/torture/strub-data2.c: New.
* c-c++-common/torture/strub-data3.c: New.
* c-c++-common/torture/strub-data4.c: New.
* c-c++-common/torture/strub-data5.c: New.
* c-c++-common/torture/strub-indcall1.c: New.
* c-c++-common/torture/strub-indcall2.c: New.
* c-c++-common/torture/strub-indcall3.c: New.
* c-c++-common/torture/strub-inlinable1.c: New.
* c-c++-common/torture/strub-inlinable2.c: New.
* c-c++-common/torture/strub-ptrfn1.c: New.
* c-c++-common/torture/strub-ptrfn2.c: New.
* c-c++-common/torture/strub-ptrfn3.c: New.
* c-c++-common/torture/strub-ptrfn4.c: New.
* c-c++-common/torture/strub-pure1.c: New.
* c-c++-common/torture/strub-pure2.c: New.
* c-c++-common/torture/strub-pure3.c: New.
* c-c++-common/torture/strub-pure4.c: New.
* c-c++-common/torture/strub-run1.c: New.
* c-c++-common/torture/strub-run2.c: New.
* c-c++-common/torture/strub-run3.c: New.
* c-c++-common/torture/strub-run4.c: New.
* c-c++-common/torture/strub-run4c.c: New.
* c-c++-common/torture/strub-run4d.c: New.
* c-c++-common/torture/strub-run4i.c: New.
* g++.dg/strub-run1.C: New.
* g++.dg/torture/strub-init1.C: New.
* g++.dg/torture/strub-init2.C: New.
* g++.dg/torture/strub-init3.C: New.
* gnat.dg/strub_attr.adb, gnat.dg/strub_attr.ads: New.
* gnat.dg/strub_ind.adb, gnat.dg/strub_ind.ads: New.
for libgcc/ChangeLog
* Makefile.in (LIB2ADD): Add strub.c.
* libgcc2.h (__strub_enter, __strub_update, __strub_leave):
Declare.
* strub.c: New.
* libgcc-std.ver.in (__strub_enter): Add to GCC_14.0.0.
(__strub_update, __strub_leave): Likewise.
This patch introduces an optional hardening pass to catch unexpected
execution flows. Functions are transformed so that basic blocks set a
bit in an automatic array, and (non-exceptional) function exit edges
check that the bits in the array represent an expected execution path
in the CFG.
Functions with multiple exit edges, or with too many blocks, call an
out-of-line checker builtin implemented in libgcc. For simpler
functions, the verification is performed in-line.
-fharden-control-flow-redundancy enables the pass for eligible
functions, --param hardcfr-max-blocks sets a block count limit for
functions to be eligible, and --param hardcfr-max-inline-blocks
tunes the "too many blocks" limit for in-line verification.
-fhardcfr-skip-leaf makes leaf functions non-eligible.
Additional -fhardcfr-check-* options are added to enable checking at
exception escape points, before potential sibcalls, hereby dubbed
returning calls, and before noreturn calls and exception raises. A
notable case is the distinction between noreturn calls expected to
throw and those expected to terminate or loop forever: the default
setting for -fhardcfr-check-noreturn-calls, no-xthrow, performs
checking before the latter, but the former only gets checking in the
exception handler. GCC can only tell between them by explicit marking
noreturn functions expected to raise with the newly-introduced
expected_throw attribute, and corresponding ECF_XTHROW flag.
for gcc/ChangeLog
* tree-core.h (ECF_XTHROW): New macro.
* tree.cc (set_call_expr): Add expected_throw attribute when
ECF_XTHROW is set.
(build_common_builtin_node): Add ECF_XTHROW to
__cxa_end_cleanup and _Unwind_Resume or _Unwind_SjLj_Resume.
* calls.cc (flags_from_decl_or_type): Check for expected_throw
attribute to set ECF_XTHROW.
* gimple.cc (gimple_build_call_from_tree): Propagate
ECF_XTHROW from decl flags to gimple call...
(gimple_call_flags): ... and back.
* gimple.h (GF_CALL_XTHROW): New gf_mask flag.
(gimple_call_set_expected_throw): New.
(gimple_call_expected_throw_p): New.
* Makefile.in (OBJS): Add gimple-harden-control-flow.o.
* builtins.def (BUILT_IN___HARDCFR_CHECK): New.
* common.opt (fharden-control-flow-redundancy): New.
(-fhardcfr-check-returning-calls): New.
(-fhardcfr-check-exceptions): New.
(-fhardcfr-check-noreturn-calls=*): New.
(Enum hardcfr_check_noreturn_calls): New.
(fhardcfr-skip-leaf): New.
* doc/invoke.texi: Document them.
(hardcfr-max-blocks, hardcfr-max-inline-blocks): New params.
* flag-types.h (enum hardcfr_noret): New.
* gimple-harden-control-flow.cc: New.
* params.opt (-param=hardcfr-max-blocks=): New.
(-param=hradcfr-max-inline-blocks=): New.
* passes.def (pass_harden_control_flow_redundancy): Add.
* tree-pass.h (make_pass_harden_control_flow_redundancy):
Declare.
* doc/extend.texi: Document expected_throw attribute.
for gcc/ada/ChangeLog
* gcc-interface/trans.cc (gigi): Mark __gnat_reraise_zcx with
ECF_XTHROW.
(build_raise_check): Likewise for all rcheck subprograms.
for gcc/c-family/ChangeLog
* c-attribs.cc (handle_expected_throw_attribute): New.
(c_common_attribute_table): Add expected_throw.
for gcc/cp/ChangeLog
* decl.cc (push_throw_library_fn): Mark with ECF_XTHROW.
* except.cc (build_throw): Likewise __cxa_throw,
_ITM_cxa_throw, __cxa_rethrow.
for gcc/testsuite/ChangeLog
* c-c++-common/torture/harden-cfr.c: New.
* c-c++-common/harden-cfr-noret-never-O0.c: New.
* c-c++-common/torture/harden-cfr-noret-never.c: New.
* c-c++-common/torture/harden-cfr-noret-noexcept.c: New.
* c-c++-common/torture/harden-cfr-noret-nothrow.c: New.
* c-c++-common/torture/harden-cfr-noret.c: New.
* c-c++-common/torture/harden-cfr-notail.c: New.
* c-c++-common/torture/harden-cfr-returning.c: New.
* c-c++-common/torture/harden-cfr-tail.c: New.
* c-c++-common/torture/harden-cfr-abrt-always.c: New.
* c-c++-common/torture/harden-cfr-abrt-never.c: New.
* c-c++-common/torture/harden-cfr-abrt-no-xthrow.c: New.
* c-c++-common/torture/harden-cfr-abrt-nothrow.c: New.
* c-c++-common/torture/harden-cfr-abrt.c: New.
* c-c++-common/torture/harden-cfr-always.c: New.
* c-c++-common/torture/harden-cfr-never.c: New.
* c-c++-common/torture/harden-cfr-no-xthrow.c: New.
* c-c++-common/torture/harden-cfr-nothrow.c: New.
* c-c++-common/torture/harden-cfr-bret-always.c: New.
* c-c++-common/torture/harden-cfr-bret-never.c: New.
* c-c++-common/torture/harden-cfr-bret-noopt.c: New.
* c-c++-common/torture/harden-cfr-bret-noret.c: New.
* c-c++-common/torture/harden-cfr-bret-no-xthrow.c: New.
* c-c++-common/torture/harden-cfr-bret-nothrow.c: New.
* c-c++-common/torture/harden-cfr-bret-retcl.c: New.
* c-c++-common/torture/harden-cfr-bret.c: New.
* g++.dg/harden-cfr-throw-always-O0.C: New.
* g++.dg/harden-cfr-throw-returning-O0.C: New.
* g++.dg/torture/harden-cfr-noret-always-no-nothrow.C: New.
* g++.dg/torture/harden-cfr-noret-never-no-nothrow.C: New.
* g++.dg/torture/harden-cfr-noret-no-nothrow.C: New.
* g++.dg/torture/harden-cfr-throw-always.C: New.
* g++.dg/torture/harden-cfr-throw-never.C: New.
* g++.dg/torture/harden-cfr-throw-no-xthrow.C: New.
* g++.dg/torture/harden-cfr-throw-no-xthrow-expected.C: New.
* g++.dg/torture/harden-cfr-throw-nothrow.C: New.
* g++.dg/torture/harden-cfr-throw-nocleanup.C: New.
* g++.dg/torture/harden-cfr-throw-returning.C: New.
* g++.dg/torture/harden-cfr-throw.C: New.
* gcc.dg/torture/harden-cfr-noret-no-nothrow.c: New.
* gcc.dg/torture/harden-cfr-tail-ub.c: New.
* gnat.dg/hardcfr.adb: New.
for libgcc/ChangeLog
* Makefile.in (LIB2ADD): Add hardcfr.c.
* hardcfr.c: New.
This patch adds the library helpers for multiplication, division + modulo
and casts from and to floating point (both binary and decimal).
As described in the intro, the first step is try to reduce further the
passed in precision by skipping over most significant limbs with just zeros
or sign bit copies. For multiplication and division I've implemented
a simple algorithm, using something smarter like Karatsuba or Toom N-Way
might be faster for very large _BitInts (which we don't support right now
anyway), but could mean more code in libgcc, which maybe isn't what people
are willing to accept.
For the to/from floating point conversions the patch uses soft-fp, because
it already has tons of handy macros which can be used for that. In theory
it could be implemented using {,unsigned} long long or {,unsigned} __int128
to/from floating point conversions with some frexp before/after, but at that
point we already need to force it into integer registers and analyze it
anyway. Plus, for 32-bit arches there is no __int128 that could be used
for XF/TF mode stuff.
I know that soft-fp is owned by glibc and I think the op-common.h change
should be propagated there, but the bitint stuff is really GCC specific
and IMHO doesn't belong into the glibc copy.
2023-09-06 Jakub Jelinek <jakub@redhat.com>
PR c/102989
libgcc/
* config/aarch64/t-softfp (softfp_extras): Use += rather than :=.
* config/i386/64/t-softfp (softfp_extras): Likewise.
* config/i386/libgcc-glibc.ver (GCC_14.0.0): Export _BitInt support
routines.
* config/i386/t-softfp (softfp_extras): Add fixxfbitint and
bf, hf and xf mode floatbitint.
(CFLAGS-floatbitintbf.c, CFLAGS-floatbitinthf.c): Add -msse2.
* config/riscv/t-softfp32 (softfp_extras): Use += rather than :=.
* config/rs6000/t-e500v1-fp (softfp_extras): Likewise.
* config/rs6000/t-e500v2-fp (softfp_extras): Likewise.
* config/t-softfp (softfp_floatbitint_funcs): New.
(softfp_bid_list): New.
(softfp_func_list): Add sf and df mode from and to _BitInt libcalls.
(softfp_bid_file_list): New.
(LIB2ADD_ST): Add $(softfp_bid_file_list).
* config/t-softfp-sfdftf (softfp_extras): Add fixtfbitint and
floatbitinttf.
* config/t-softfp-tf (softfp_extras): Likewise.
* libgcc2.c (bitint_reduce_prec): New inline function.
(BITINT_INC, BITINT_END): Define.
(bitint_mul_1, bitint_addmul_1): New helper functions.
(__mulbitint3): New function.
(bitint_negate, bitint_submul_1): New helper functions.
(__divmodbitint4): New function.
* libgcc2.h (LIBGCC2_UNITS_PER_WORD): When building _BitInt support
libcalls, redefine depending on __LIBGCC_BITINT_LIMB_WIDTH__.
(__mulbitint3, __divmodbitint4): Declare.
* libgcc-std.ver.in (GCC_14.0.0): Export _BitInt support routines.
* Makefile.in (lib2funcs): Add _mulbitint3.
(LIB2_DIVMOD_FUNCS): Add _divmodbitint4.
* soft-fp/bitint.h: New file.
* soft-fp/fixdfbitint.c: New file.
* soft-fp/fixsfbitint.c: New file.
* soft-fp/fixtfbitint.c: New file.
* soft-fp/fixxfbitint.c: New file.
* soft-fp/floatbitintbf.c: New file.
* soft-fp/floatbitintdf.c: New file.
* soft-fp/floatbitinthf.c: New file.
* soft-fp/floatbitintsf.c: New file.
* soft-fp/floatbitinttf.c: New file.
* soft-fp/floatbitintxf.c: New file.
* soft-fp/op-common.h (_FP_FROM_INT): Add support for rsize up to
4 * _FP_W_TYPE_SIZE rather than just 2 * _FP_W_TYPE_SIZE.
* soft-fp/bitintpow10.c: New file.
* soft-fp/fixsdbitint.c: New file.
* soft-fp/fixddbitint.c: New file.
* soft-fp/fixtdbitint.c: New file.
* soft-fp/floatbitintsd.c: New file.
* soft-fp/floatbitintdd.c: New file.
* soft-fp/floatbitinttd.c: New file.
If the xgcc executable has not been built (or has been removed by 'make
clean') then the command to print the multilib dir fails, and so the
MULTIOSDIR variable is empty. That then causes:
/bin/sh: line 0: test: !=: unary operator expected
We can avoid it by quoting the variable.
libgcc/ChangeLog:
* Makefile.in: Quote variable.
This patch adds support for trunc and extend operations between HF
mode (_Float16) and Decimal Floating Point formats (_Decimal32,
_Decimal64 and _Decimal128).
For simplicity we rely on the implicit conversions inserted by the
compiler between HF and SD/DF/TF modes. The existing bid*_to_binary*
and binary*_to_bid* functions are non-trivial and at this stage it is
not clear if there is a performance-critical use case involving _Float16
and _Decimal* formats.
The patch also adds two executable tests, to make sure the right
functions are called, available (link phase) and functional.
Tested on aarch64 and x86_64. The number of symbol matches in the
testcases includes the .global XXX to avoid having to match different
call instructions for different targets.
2022-05-04 Christophe Lyon <christophe.lyon@arm.com>
libgcc/ChangeLog:
* Makefile.in (D32PBIT_FUNCS): Add _hf_to_sd and _sd_to_hf.
(D64PBIT_FUNCS): Add _hf_to_dd and _dd_to_hf.
(D128PBIT_FUNCS): Add _hf_to_td _td_to_hf.
libgcc/config/libbid/ChangeLog:
* bid_gcc_intrinsics.h (LIBGCC2_HAS_HF_MODE): Define according to
__LIBGCC_HAS_HF_MODE__.
(BID_HAS_HF_MODE): Define.
(HFtype): Define.
(__bid_extendhfsd): New prototype.
(__bid_extendhfdd): Likewise.
(__bid_extendhftd): Likewise.
(__bid_truncsdhf): Likewise.
(__bid_truncddhf): Likewise.
(__bid_trunctdhf): Likewise.
* _dd_to_hf.c: New file.
* _hf_to_dd.c: New file.
* _hf_to_sd.c: New file.
* _hf_to_td.c: New file.
* _sd_to_hf.c: New file.
* _td_to_hf.c: New file.
gcc/testsuite/ChangeLog:
* gcc.dg/torture/convert-dfp-2.c: New test.
* gcc.dg/torture/convert-dfp.c: New test.
For 32-bit libgcc configure w/o sse2, there's would be an error since
GCC only support _Float16 under sse2. Explicitly add -msse2 for those
HF related libgcc functions, so users can still link them w/ the
upper configuration.
libgcc/ChangeLog:
* Makefile.in: Adjust to support specific CFLAGS for each
libgcc source file.
* config/i386/64/t-softfp: Explicitly add -msse2 for HF
related libgcc source files.
* config/i386/t-softfp: Ditto.
* config/i386/_divhc3.c: New file.
* config/i386/_mulhc3.c: New file.
Add __gcov_info_to_gcda() to libgcov to get the gcda data for a gcda info in a
freestanding environment. It is intended to be used with the
-fprofile-info-section option. A crude test program which doesn't use a linker
script is (use "gcc -coverage -fprofile-info-section -lgcov test.c" to compile
it):
#include <gcov.h>
#include <stdio.h>
#include <stdlib.h>
extern const struct gcov_info *my_info;
static void
filename (const char *f, void *arg)
{
printf("filename: %s\n", f);
}
static void
dump (const void *d, unsigned n, void *arg)
{
const unsigned char *c = d;
for (unsigned i = 0; i < n; ++i)
printf ("%02x", c[i]);
}
static void *
allocate (unsigned length, void *arg)
{
return malloc (length);
}
int main()
{
__asm__ volatile (".set my_info, .LPBX2");
__gcov_info_to_gcda (my_info, filename, dump, allocate, NULL);
return 0;
}
With this patch, <stdint.h> is included in libgcov-driver.c even if
inhibit_libc is defined. This header file should be also available for
freestanding environments. If this is not the case, then we have to define
intptr_t somehow.
The patch removes one use of memset() which makes the <string.h> include
superfluous.
gcc/
* gcov-io.h (gcov_write): Declare.
* gcov-io.c (gcov_write): New.
(gcov_write_counter): Remove.
(gcov_write_tag_length): Likewise.
(gcov_write_summary): Replace gcov_write_tag_length() with calls to
gcov_write_unsigned().
* doc/invoke.texi (fprofile-info-section): Mention
__gcov_info_to_gdca().
gcc/testsuite/
* gcc.dg/gcov-info-to-gcda.c: New test.
libgcc/
* Makefile.in (LIBGCOV_DRIVER): Add _gcov_info_to_gcda.
* gcov.h (gcov_info): Declare.
(__gcov_info_to_gdca): Likewise.
* libgcov.h (gcov_write_counter): Remove.
(gcov_write_tag_length): Likewise.
* libgcov-driver.c (#include <stdint.h>): New.
(#include <string.h>): Remove.
(NEED_L_GCOV): Conditionally define.
(NEED_L_GCOV_INFO_TO_GCDA): Likewise.
(are_all_counters_zero): New.
(gcov_dump_handler): Likewise.
(gcov_allocate_handler): Likewise.
(dump_unsigned): Likewise.
(dump_counter): Likewise.
(write_topn_counters): Add dump_fn, allocate_fn, and arg parameters.
Use dump_unsigned() and dump_counter().
(write_one_data): Add dump_fn, allocate_fn, and arg parameters. Use
dump_unsigned(), dump_counter(), and are_all_counters_zero().
(__gcov_info_to_gcda): New.
GNU Make supports "-include" keyword to prevent warnings and errors due to
inclusion of non-existent files. This patch changes gcc/ and libgcc/ to use
"-include" in place of the historical conditional inclusion and use of
empty.mk work-arounds.
gcc/ChangeLog
2020-06-23 David Edelsohn <dje.gcc@gmail.com>
* Makefile.in (LANG_MAKEFRAGS): Same.
(tmake_file): Use -include.
(xmake_file): Same.
libgcc/ChangeLog
2020-06-23 David Edelsohn <dje.gcc@gmail.com>
* Makefile.in: Remove uses of empty.mk. Use -include.
* config/avr/t-avr: Use -include.
* empty.mk: Delete.
libgcc/config/avr/libf7/ChangeLog
2020-06-23 David Edelsohn <dje.gcc@gmail.com>
* t-libf7: Same.
One target file (config/c6x/t-elf) lists _printf and _gcc_bcmp in
LIB2FUNCS_EXCLUDE, but that does not have any effect, since those are
not filtered away from LIB2FUNCS_ST. Another option is to do as in
config/rl78/t-rl78, which explicitly sets LIB2FUNCS_ST
# Remove __gcc_bcmp from LIB2FUNCS_ST
LIB2FUNCS_ST = _eprintf
but honouring LIB2FUNCS_EXCLUDE also for LIB2FUNCS_ST seems more
natural.
From-SVN: r265246
For some targets (in my case VxWorks 5.5), libgcov does not compile due
to missing functions and macros such as getpid() and F_OK.
Incidentally, gcc/Makefile.in already contains comments such as
# Install gcov if it was compiled.
but there is no logic in place to actually allow gcov to not be
compiled.
So add an option for disabling build and install of libgcov and the
related host tools.
From-SVN: r262180
Enable building libgcc with CET options by default on Linux/x86 if
binutils supports CET v2.0. It can be disabled with --disable-cet.
It is an error to configure GCC with --enable-cet if bintuiils
doesn't support CET v2.0.
ENDBR instruction is added to __morestack_large_model since it is
called indirectly.
2017-11-17 Igor Tsimbalist <igor.v.tsimbalist@intel.com>
config/
* cet.m4: New file.
gcc/
* config.gcc (extra_headers): Add cet.h for x86 targets.
* config/i386/cet.h: New file.
* doc/install.texi: Add --enable-cet/--disable-cet.
libgcc/
* Makefile.in (configure_deps): Add $(srcdir)/../config/cet.m4.
(CET_FLAGS): New.
* config/i386/morestack.S: Include <cet.h>.
(__morestack_large_model): Add _CET_ENDBR at function entrance.
* config/i386/resms64.h: Include <cet.h>.
* config/i386/resms64f.h: Likewise.
* config/i386/resms64fx.h: Likewise.
* config/i386/resms64x.h: Likewise.
* config/i386/savms64.h: Likewise.
* config/i386/savms64f.h: Likewise.
* config/i386/t-linux (HOST_LIBGCC2_CFLAGS): Add $(CET_FLAGS).
(CRTSTUFF_T_CFLAGS): Likewise.
* configure.ac: Include ../config/cet.m4.
Set and substitute CET_FLAGS.
* configure: Regenerated.
From-SVN: r254868
2017-04-19 Martin Liska <mliska@suse.cz>
PR gcov-profile/80435
* Makefile.in: Install gcov.h.
* gcov.h: New file.
* libgcov.h: Use the header and make __gcov_flush publicly
visible.
From-SVN: r246990
* Makefile.in: Swap definition of LIBGCC_LINKS and inclusion of
target makefile fragment.
* config/sh/t-sh (unwind-dw2-Os-4-200.o): Depend on LIBGCC_LINKS.
From-SVN: r246766
PR other/79046
* configure: Regenerated.
config/
* acx.m4 (GCC_BASE_VER): New m4 function.
(ACX_TOOL_DIRS): Require GCC_BASE_VER, for
--with-gcc-major-version-only use just major number from BASE-VER.
gcc/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (version): Use @get_gcc_base_ver@ instead of cat to get
version from BASE-VER file.
(CFLAGS-gcc.o): Add -DBASEVER=$(BASEVER_s).
(gcc.o): Depend on $(BASEVER).
* common.opt (dumpfullversion): New option.
* gcc.c (driver_handle_option): Handle OPT_dumpfullversion.
* doc/invoke.texi: Document -dumpfullversion.
* doc/install.texi: Document --with-gcc-major-version-only.
* configure: Regenerated.
libatomic/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* testsuite/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
libgomp/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* testsuite/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
libgcc/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (version): Use @get_gcc_base_ver@ instead of cat to get
version from BASE-VER file.
* configure: Regenerated.
libssp/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
liboffloadmic/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* aclocal.m4: Include ../config/acx.m4.
* configure: Regenerated.
* Makefile.in: Regenerated.
libquadmath/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
libmpx/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
libada/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (version): Use @get_gcc_base_ver@ instead of cat to get
version from BASE-VER file.
* configure: Regenerated.
lto-plugin/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
libitm/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* testsuite/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
fixincludes/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
libcilkrts/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* aclocal.m4: Include ../config/acx.m4.
* configure: Regenerated.
* Makefile.in: Regenerated.
libcc1/
* configure.ac: Add GCC_BASE_VER. For --with-gcc-major-version-only
use just major number from BASE-VER.
* configure: Regenerated.
* Makefile.in: Regenerated.
libobjc/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
libstdc++-v3/
* configure.ac: Add GCC_BASE_VER.
* fragment.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* po/Makefile.in: Regenerated.
* libsupc++/Makefile.in: Regenerated.
* testsuite/Makefile.in: Regenerated.
* src/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
* include/Makefile.in: Regenerated.
* doc/Makefile.in: Regenerated.
* python/Makefile.in: Regenerated.
* src/c++11/Makefile.in: Regenerated.
* src/c++98/Makefile.in: Regenerated.
* src/filesystem/Makefile.in: Regenerated.
libvtv/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* testsuite/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
libsanitizer/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* libbacktrace/Makefile.in: Regenerated.
* interception/Makefile.in: Regenerated.
* asan/Makefile.in: Regenerated.
* ubsan/Makefile.in: Regenerated.
* configure: Regenerated.
* sanitizer_common/Makefile.in: Regenerated.
* lsan/Makefile.in: Regenerated.
* Makefile.in: Regenerated.
* tsan/Makefile.in: Regenerated.
libgfortran/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
From-SVN: r244521
Also fix a stray changelog entry. Some of the regen here is due to
previous changes not being regenerated properly, in part due to the
missing configure dependencies.
* configure: Regenerate.
config/
* picflag.m4: Remove stray \xA0 in comment.
gcc/
* Makefile.in (aclocal_deps): Update and order as per aclocal.m4.
* configure: Regenerate.
* config.in: Regenerate.
libada/
* Makefile.in (configure_deps): Update and order as per
configure.ac sinclude.
* configure: Regenerate.
libgcc/
* Makefile.in (configure_deps): Update.
* configure: Regenerate.
libiberty/
* Makefile.in (configure_deps): Update.
* configure: Regenerate.
libitm/
* Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.
From-SVN: r244049
* configure.ac: Do not create links, only substitute the filenames.
* configure: Regenerate.
* Makefile.in: Assign the substitution results to variables.
(LIBGCC_LINKS): Define.
(enable-execute-stack.c): New rule.
(unwind.h): Likewise.
(md-unwind-support.h): Likewise.
(sfp-machine.h): Likewise.
(gthr-default.h): Likewise.
Add $(LIBGCC_LINKS) to the prerequisites of all object files and
unwind.h as prerequisite of install-unwind_h-forbuild.
From-SVN: r240312
This patch arranges for half-precision complex multiply and divide
routines to be built if __LIBGCC_HAS_HF_MODE__. This will be true
if the target supports the _Float16 type.
libgcc/
PR target/63250
* Makefile.in (lib2funcs): Build _mulhc3 and _divhc3.
* libgcc2.h (LIBGCC_HAS_HF_MODE): Conditionally define.
(HFtype): Likewise.
(HCtype): Likewise.
(__divhc3): Likewise.
(__mulhc3): Likewise.
* libgcc2.c: Support _mulhc3 and _divhc3.
From-SVN: r240043
* Makefile.in: Remove __gcov_indirect_call_profiler.
* libgcov-profiler.c (__gcov_indirect_call_profiler): Remove
function.
* libgcov.h: And the declaration of the function.
From-SVN: r239306
gcc/
PR driver/68463
* config/gnu-user.h (CRTOFFLOADBEGIN): Define. Add crtoffloadbegin.o if
offloading is enabled and -fopenacc or -fopenmp is specified.
(CRTOFFLOADEND): Likewise.
(GNU_USER_TARGET_STARTFILE_SPEC): Add CRTOFFLOADBEGIN.
(GNU_USER_TARGET_ENDFILE_SPEC): Add CRTOFFLOADEND.
* lto-wrapper.c (offloadbegin, offloadend): Remove static vars.
(offload_objects_file_name): New static var.
(tool_cleanup): Remove offload_objects_file_name file.
(find_offloadbeginend): Replace with ...
(find_crtoffloadtable): ... this.
(run_gcc): Remove offload_argc and offload_argv.
Get offload_objects_file_name from -foffload-objects=... option.
Read names of object files with offload from this file, pass them to
compile_images_for_offload_targets. Don't call find_offloadbeginend and
don't pass offloadbegin and offloadend to the linker. Don't pass
offload non-LTO files to the linker, because now they're not claimed.
libgcc/
PR driver/68463
* Makefile.in (crtoffloadtable$(objext)): New rule.
* configure.ac (extra_parts): Add crtoffloadtable$(objext) if
enable_offload_targets is not empty.
* configure: Regenerate.
* offloadstuff.c: Move __OFFLOAD_TABLE__ from crtoffloadend to
crtoffloadtable.
libgomp/
PR driver/68463
* testsuite/libgomp.oacc-c-c++-common/parallel-dims-2.c: Remove.
lto-plugin/
PR driver/68463
* lto-plugin.c (struct plugin_offload_file): New.
(offload_files): Change type.
(offload_files_last, offload_files_last_obj): New.
(offload_files_last_lto): New.
(free_2): Adjust accordingly.
(all_symbols_read_handler): Don't add offload files to lto_arg_ptr.
Don't call free_1 for offload_files. Write names of object files with
offloading to the temporary file. Add new option to lto_arg_ptr.
(claim_file_handler): Don't claim file if it contains offload sections
without LTO sections. If it contains offload sections, add to the list.
From-SVN: r233712
* Makefile.in (real_host_noncanonical): New variable.
(libsubdir): Use it.
* configure.ac (real_host_noncanonical): Compute. Remove special
case for intelmicemul.
* configure: Regenerate.
From-SVN: r222585
* gcc/config/i386/cygwin.h (STARTFILE_SPEC): Add vtv_start.o,
if -fvtable-verify=preinit/std is used.
* gcc/config/i386/mingw-w64.h (STARTFILE_SPEC): Likewise.
* gcc/config/i386/mingw32.h (STARTFILE_SPEC): Likewise.
* gcc/config/i386/cygwin.h (ENDFILE_SPEC): Add vtv_end.o,
if -fvtable-verify=preinit/std is used.
* gcc/config/i386/mingw32.h (ENDFILE_SPEC): Likewise.
* gcc/config/i386/cygwin.h (LIB_SPEC): Pass -lvtv and -lpsapi,
if -fvtable-verify=preinit/std is used.
* gcc/config/i386/mingw-w64.h (LIB_SPEC): Likewise.
* gcc/config/i386/mingw32.h (LIB_SPEC): Likewise.
* gcc/cp/vtable-class-hierarchy.c (vtv_generate_init_routine): Add
check for not TARGET_PECOFF at the VTV_PREINIT_PRIORITY checks.
* gcc/varasm.c (assemble_variable): Add code to properly set the comdat
section and name for the .vtable_map_vars section in case the
target is PE or COFF.
* libgcc/Makefile.in: Move rules to build vtv_*.o out of the check
for CUSTOM_CRTSTUFF.
* libgcc/config.host (i[34567]86-*-cygwin*, x86_64-*-cygwin*, i[34567]86-*-mingw*)
(x86_64-*-mingw*): Only add vtv_*.o to extra_parts if enable_vtable_verify.
* libstdc++-v3/acinclude.m4: Define VTV_CYGMIN.
* libstdc++-v3/configure: Regenerate.
* libstdc++-v3/libsupc++/Makefile.am: Add vtv_sources only to
libsupc___la_SOURCES and libsupc__convenience_la_SOURCES if VTV_CYGMIN is
not set.
* libstdc++-v3/libsupc++/Makefile.in: Regenerated.
* libstdc++-v3/libsupc++/vtv_stubs.cc: Add none weak declaration of every
function for Cygwin and MinGW.
* libstdc++-v3/src/Makefile.am: Add libvtv.la to toolexeclib_LTLIBRARIES,
if VTV_CYGMIN is set. Define libvtv_la_SOURCES, libvtv_la_LDFLAGS,
libvtv_la_AM_CXXFLAGS and libvtv_la_LINK if VTV_CYGMIN is set.
* libstdc++-v3/src/Makefile.in: Regenerate.
* libvtv/Makefile.am : Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN
is set. Define libvtv_la_LIBADD, libvtv_la_LDFLAGS, libvtv_stubs_la_LDFLAGS
and libvtv_stubs_la_SOURCES if VTV_CYGMIN is set. Add obstac.c to
libvtv_la_SOURCES if VTV_CYGMIN is set.
* libvtv/Makefile.in : Regenerate.
* libvtv/aclocal.m4 : Regenerate.
* libvtv/configure : Regenerate.
* libvtv/configure.ac : Add ACX_LT_HOST_FLAGS. Define VTV_CYGMIN.
* libvtv/configure.tgt : (x86_64-*-cygwin*, i?86-*-cygwin*, x86_64-*-mingw*)
(i?86-*-mingw*): Add to supported targets.
* libvtv/vtv_fail.cc : Skip inclusion of execinfo.h on Cygwin and MinGW.
(log_error_message): Skip calls to backtrace and backtrace_symbols_fd on Cygwin
and MinGW.
* libvtv/vtv_malloc.cc : Include windows.h and skip sys/mman.h inclusion on
Cygwin and MinGW. Add sysconf port on Cygwin and MinGW.
(obstack_chunk_alloc): Exchange call to mmap with call to VirtualAlloc on Cygwin
and MinGW.
(__vtv_malloc_init): Exchange call to sysconf with call to port of sysconf on
Cygwin and MinGW.
* libvtv/vtv_malloc.h : Declare mprotect and define PROT_READ and PROT_WRITE on
Cygwin and MinGW.
* libvtv/map.h : Include stdint.h on MinGW.
* libvtv/rts.cc : Include windows.h, winternl.h and psapi.h, skip include of
execinfo.h, sys/mman.h and link.h on Cygwin and MinGW.
Add port of __fortify_fail on Cygwin and MinGW.
Change ElfW (Addr) to uintptr_t on Cygwin and MinGW.
(read_section_offset_and_length): Add port for Cygwin and MinGW
(iterate_modules): New function.
(vtv_unprotect_vtable_vars): Use iterate_modules instead of dl_iterate_phdr on
Cygwin and MinGW.
(vtv_protect_vtable_vars): Likewise.
(count_all_pages): Likewise.
(dl_iterate_phdr_count_pages): Don't build on Cygwin and MinGW.
* libvtv/utils.cc : Include windows.h and skip execinfo.h inclusion on
Cygwin and MinGW.
(__vtv_open_log): Exchange call to getuid and getpid with GetCurrentProcessId and
adjust call to snprintf accordingly on Cygwin and MinGW.
Adjust calls to mkdir on MinGW.
Adjust call to open on Cygwin and MinGW.
(__vtv_add_to_log): Adjust call to snprintf on Cygwin and MinGW.
(__vtv_log_verification_failure): Don't generate a backtrace on Cygwin and MinGW.
From-SVN: r220232
