mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-24 15:46:49 +03:00
libgcc-5.4.0 big decimal and soft float point functions
git-svn-id: svn://kolibrios.org@6518 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
parent
b275298c0a
commit
3c24fb5fae
@ -6,36 +6,46 @@ export STRIP = kos32-strip
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export SDK_DIR:= $(abspath ../../../../sdk)
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cpu_type = i386
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enable_shared = no
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double_type_size = 64
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long_double_type_size = 96
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decimal_float = yes
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enable_vtable_verify = no
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enable_decimal_float = bid
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fixed_point = no
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FPBIT = true
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DPBIT = true
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D32PBIT = 1
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D64PBIT = 1
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D128PBIT = 1
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# List of functions not to build from libgcc2.c.
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LIB2FUNCS_EXCLUDE =
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#FPBIT = true
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#DPBIT = true
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CFLAGS_OPT+= -fomit-frame-pointer -fno-ident -mno-ms-bitfields
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CFLAGS_OPT+= -fbuilding-libgcc -fno-stack-protector
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CFLAGS = -c -O2 -DIN_GCC -DIN_LIBGCC2 -DHAVE_CC_TLS -DUSE_EMUTLS -DENABLE_DECIMAL_BID_FORMAT
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CFLAGS = -c -O2 -DIN_GCC -DIN_LIBGCC2 -DHAVE_CC_TLS -DUSE_EMUTLS
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CFLAGS+= -U_Win32 -U_WIN32 -U__MINGW32__ -UWIN32 -U_MSC_VER
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CFLAGS+= -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
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CFLAGS+= -Wmissing-prototypes -Wold-style-definition $(CFLAGS_OPT)
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CFLAGS+= -Wold-style-definition $(CFLAGS_OPT)
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INCLUDES = -I. -I../gcc -I../include
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DECNUMINC = -Iconfig/libbid -DENABLE_DECIMAL_BID_FORMAT
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INCLUDES = -I. -I../gcc -I../include $(DECNUMINC)
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gcc_compile = $(CC) $(INCLUDES) $(CFLAGS)
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# Defined in libgcc2.c, included only in the static library.
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LIB2FUNCS_ST = _eprintf __gcc_bcmp
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# List of functions not to build from libgcc2.c.
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LIB2FUNCS_EXCLUDE =
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# These might cause a divide overflow trap and so are compiled with
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# unwinder info.
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LIB2_DIVMOD_FUNCS = _divdi3 _moddi3 _udivdi3 _umoddi3 _udiv_w_sdiv _udivmoddi4
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objext = .o
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FPBIT_FUNCS = _pack_sf _unpack_sf _addsub_sf _mul_sf _div_sf \
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@ -53,6 +63,127 @@ TPBIT_FUNCS = _pack_tf _unpack_tf _addsub_tf _mul_tf _div_tf \
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_lt_tf _le_tf _unord_tf _si_to_tf _tf_to_si _negate_tf _make_tf \
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_tf_to_df _tf_to_sf _thenan_tf _tf_to_usi _usi_to_tf
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# Additional sources to handle exceptions; overridden by targets as needed.
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LIB2ADDEH = unwind-dw2.c unwind-dw2-fde.c unwind-sjlj.c unwind-c.c
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LIB2ADDEHSTATIC = $(LIB2ADDEH)
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#LIB2ADD = $(srcdir)/config/i386/gthr-win32.c
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EH_MODEL = dw2
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CUSTOM_CRTSTUFF = yes
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crtbegin.o: $(srcdir)/config/i386/cygming-crtbegin.c
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$(crt_compile) -fno-omit-frame-pointer -c $<
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crtbeginS.o: $(srcdir)/config/i386/cygming-crtbegin.c
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$(crt_compile) -fno-omit-frame-pointer -c $< -DCRTSTUFFS_O
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# We intentionally use a implementation-reserved init priority of 0,
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# so allow the warning.
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crtend.o: $(srcdir)/config/i386/cygming-crtend.c
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$(crt_compile) -fno-omit-frame-pointer -Wno-error -c $<
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# This is an endfile, Use -minline-all-stringops to ensure
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# that __builtin_memset doesn't refer to the lib function memset().
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crtfastmath.o: $(srcdir)/config/i386/crtfastmath.c
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$(gcc_compile) -mfxsr -msse -c $<
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LIB1ASMSRC = i386/cygwin.S
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LIB1ASMFUNCS = _chkstk _chkstk_ms
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DFP_ENABLE = true
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LIB2ADD += config/i386/cpuinfo.c
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softfp_float_modes := tf
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softfp_int_modes := si di ti
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softfp_extensions := sftf dftf xftf
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softfp_truncations := tfsf tfdf tfxf
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softfp_exclude_libgcc2 := n
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# Omit TImode functions
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softfp_int_modes := si di
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# Provide fallbacks for __builtin_copysignq and __builtin_fabsq.
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LIB2ADD += config/i386/32/tf-signs.c
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# While emutls.c has nothing to do with EH, it is in LIB2ADDEH*
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# instead of LIB2ADD because that's the way to be sure on some targets
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# (e.g. *-*-darwin*) only one copy of it is linked.
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LIB2ADDEH += emutls.c
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LIB2ADDEHSTATIC += emutls.c
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softfp_float_funcs = add$(m)3 div$(m)3 eq$(m)2 ge$(m)2 le$(m)2 mul$(m)3 \
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neg$(m)2 sub$(m)3 unord$(m)2
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softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \
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float$(i)$(m) floatun$(i)$(m)
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softfp_func_list := \
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$(foreach m,$(softfp_float_modes), \
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$(softfp_float_funcs) \
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$(foreach i,$(softfp_int_modes), \
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$(softfp_floatint_funcs))) \
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$(foreach e,$(softfp_extensions),extend$(e)2) \
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$(foreach t,$(softfp_truncations),trunc$(t)2) \
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$(softfp_extras)
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ifeq ($(softfp_exclude_libgcc2),y)
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# This list is taken from mklibgcc.in and doesn't presently allow for
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# 64-bit targets where si should become di and di should become ti.
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softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \
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fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \
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floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \
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floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list))
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endif
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softfp_file_list := $(addsuffix .c,$(addprefix soft-fp/,$(softfp_func_list)))
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# Disable missing prototype and type limit warnings. The prototypes
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# for the functions in the soft-fp files have not been brought across
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# from glibc.
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soft-fp-objects-base = $(basename $(notdir $(softfp_file_list)))
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soft-fp-objects = $(addsuffix $(objext), $(soft-fp-objects-base)) \
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$(addsuffix _s$(objext), $(soft-fp-objects-base))
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$(soft-fp-objects) : INTERNAL_CFLAGS += -Wno-missing-prototypes -Wno-type-limits
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LIB2ADD += $(softfp_file_list)
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ifneq ($(softfp_exclude_libgcc2),y)
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# Functions in libgcc2.c are excluded for each soft-float mode (a
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# target may have both soft-float and hard-float modes), for the fixed
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# list of integer modes (si and di) for which libgcc2.c defines any
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# such functions. Depending on the target, the si and di symbols may
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# in fact define di and ti functions.
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LIB2FUNCS_EXCLUDE += \
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$(addprefix _,$(foreach m,$(softfp_float_modes), \
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$(foreach i,si di, \
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$(softfp_floatint_funcs))))
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endif
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iterator = empty.mk $(patsubst %,static-object.mk,$(iter-items))
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lib2funcs = _muldi3 _negdi2 _lshrdi3 _ashldi3 _ashrdi3 _cmpdi2 _ucmpdi2 \
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_clear_cache _trampoline __main _absvsi2 _absvdi2 _addvsi3 \
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@ -70,15 +201,59 @@ dwfloatfuncs = $(patsubst %,_fix%XX,sf df xf tf) \
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$(patsubst %,_floatXX%,sf df xf tf) \
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$(patsubst %,_floatunXX%,sf df xf tf)
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lib2funcs += $(subst XX,si,$(swfloatfuncs))
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lib2funcs += $(subst XX,di,$(dwfloatfuncs))
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ifeq ($(LIB2_SIDITI_CONV_FUNCS),)
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lib2funcs += $(subst XX,si,$(swfloatfuncs))
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lib2funcs += $(subst XX,di,$(dwfloatfuncs))
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endif
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# These might cause a divide overflow trap and so are compiled with
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# unwinder info.
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LIB2_DIVMOD_FUNCS = _divdi3 _moddi3 _udivdi3 _umoddi3 _udiv_w_sdiv _udivmoddi4
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# Remove any objects from lib2funcs and LIB2_DIVMOD_FUNCS that are
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# defined as optimized assembly code in LIB1ASMFUNCS or as C code
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# in LIB2FUNCS_EXCLUDE.
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lib2funcs := $(filter-out $(LIB2FUNCS_EXCLUDE) $(LIB1ASMFUNCS),$(lib2funcs))
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LIB2_DIVMOD_FUNCS := $(filter-out $(LIB2FUNCS_EXCLUDE) $(LIB1ASMFUNCS), \
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$(LIB2_DIVMOD_FUNCS))
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# Build lib2funcs. For the static library also include LIB2FUNCS_ST.
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lib2funcs-o = $(patsubst %,%$(objext),$(lib2funcs) $(LIB2FUNCS_ST))
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$(lib2funcs-o): %$(objext): libgcc2.c
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$(gcc_compile) -DL$* -c $< -o $@
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libgcc-objects += $(lib2funcs-o)
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libgcc-objects =
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ifneq ($(LIB2_SIDITI_CONV_FUNCS),)
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# Build libgcc2.c for each conversion function, with a specific
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# L<func> definition and LIBGCC2_UNITS_PER_WORD setting. The DImode
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# functions are built with a wordsize of 4; the TImode functions are
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# built with the same labels, but a wordsize of 8.
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sifuncs := $(filter-out $(LIB2FUNCS_EXCLUDE),$(subst XX,si,$(swfloatfuncs)))
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difuncs := $(filter-out $(LIB2FUNCS_EXCLUDE),$(subst XX,di,$(dwfloatfuncs)))
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tifuncs := $(filter-out $(LIB2FUNCS_EXCLUDE),$(subst XX,ti,$(dwfloatfuncs)))
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iter-items := $(sifuncs) $(difuncs) $(tifuncs)
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iter-labels := $(sifuncs) $(difuncs) $(difuncs)
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iter-sizes := $(patsubst %,4,$(sifuncs) $(difuncs)) $(patsubst %,8,$(tifuncs))
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include empty.mk $(patsubst %,siditi-object.mk,$(iter-items))
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libgcc-objects += $(patsubst %,%$(objext),$(sifuncs) $(difuncs) $(tifuncs))
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endif
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ifeq ($(LIB2_DIVMOD_EXCEPTION_FLAGS),)
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# Provide default flags for compiling divmod functions, if they haven't been
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# set already by a target-specific Makefile fragment.
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LIB2_DIVMOD_EXCEPTION_FLAGS := -fexceptions -fnon-call-exceptions
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endif
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# Build LIB2_DIVMOD_FUNCS.
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lib2-divmod-o = $(patsubst %,%$(objext),$(LIB2_DIVMOD_FUNCS))
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$(lib2-divmod-o): %$(objext): libgcc2.c
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$(gcc_compile) -DL$* -c $< $(LIB2_DIVMOD_EXCEPTION_FLAGS) -o $@
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libgcc-objects += $(lib2-divmod-o)
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ifeq ($(TPBIT),)
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# _sf_to_tf and _df_to_tf require tp-bit.c being compiled in.
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@ -116,6 +291,71 @@ $(tpbit-o): %$(objext): $(fpbit-src)
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libgcc-objects += $(tpbit-o)
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endif
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# Build decimal floating point support.
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ifeq ($(decimal_float),yes)
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# If $DFP_ENABLE is set, then we want all data type sizes.
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ifneq ($(DFP_ENABLE),)
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D32PBIT = 1
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D64PBIT = 1
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D128PBIT = 1
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endif
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dfp-filenames =
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ifneq ($(D32PBIT)$(D64PBIT)$(D128PBIT),)
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ifeq ($(enable_decimal_float),bid)
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dfp-filenames += bid_decimal_globals bid_decimal_data \
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bid_binarydecimal bid_convert_data \
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_isinfd32 _isinfd64 _isinfd128 bid64_noncomp \
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bid128_noncomp bid128_fma bid_round bid_from_int \
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bid64_add bid128_add bid64_div bid128_div \
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bid64_mul bid128_mul bid64_compare bid128_compare \
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bid128 bid32_to_bid64 bid32_to_bid128 bid64_to_bid128 \
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bid64_to_int32 bid64_to_int64 \
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bid64_to_uint32 bid64_to_uint64 \
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bid128_to_int32 bid128_to_int64 \
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bid128_to_uint32 bid128_to_uint64
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else
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dfp-filenames += decContext decNumber decExcept decRound decLibrary decDouble decPacked decQuad decSingle
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endif
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endif
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dfp-objects = $(patsubst %,%$(objext),$(dfp-filenames))
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ifeq ($(enable_decimal_float),bid)
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$(dfp-objects): %$(objext): config/libbid/%.c
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else
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$(dfp-objects): %$(objext): ../libdecnumber/%.c
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endif
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$(gcc_compile) -c $<
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libgcc-objects += $(dfp-objects)
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decbits-filenames =
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ifneq ($(enable_decimal_float),bid)
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ifneq ($(D32PBIT),)
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decbits-filenames += decimal32
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endif
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ifneq ($(D64PBIT),)
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decbits-filenames += decimal64
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endif
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ifneq ($(D128PBIT),)
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decbits-filenames += decimal128
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endif
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endif
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decbits-objects = $(patsubst %,%$(objext),$(decbits-filenames))
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ifeq ($(enable_decimal_float),bid)
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$(decbits-objects): %$(objext): config/libbid/%.c
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else
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$(decbits-objects): %$(objext): ../libdecnumber/$(enable_decimal_float)/%.c
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endif
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$(gcc_compile) -c $<
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libgcc-objects += $(decbits-objects)
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# Next build individual support functions.
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D32PBIT_FUNCS = _addsub_sd _div_sd _mul_sd _plus_sd _minus_sd \
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_eq_sd _ne_sd _lt_sd _gt_sd _le_sd _ge_sd \
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@ -188,12 +428,34 @@ endif
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libgcc-objects += $(d128pbit-o)
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endif
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endif
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# Build LIB2ADD and LIB2ADD_ST.
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ifneq ($(filter-out %.c %.S %.asm,$(LIB2ADD) $(LIB2ADD_ST)),)
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$(error Unsupported files in LIB2ADD or LIB2ADD_ST.)
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endif
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libgcc-objects += $(addsuffix $(objext),$(basename $(notdir $(LIB2ADD))))
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#libgcc-objects += $(addsuffix $(objext),$(basename $(notdir $(LIB2ADD_ST))))
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c_flags :=
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iter-items := $(LIB2ADD) $(LIB2ADD_ST)
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include $(iterator)
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c_flags := -fexceptions
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#libgcc-objects += $(addsuffix $(objext),$(basename $(notdir $(LIB2ADDEH))))
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iter-items := $(LIB2ADDEH)
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include $(iterator)
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# targets
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all: libgcc.a
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libgcc.a : $(lib2funcs-o) $(libgcc-objects) Makefile
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$(AR) crs libgcc.a $(lib2funcs-o) $(libgcc-objects)
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libgcc.a : $(libgcc-objects) Makefile
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$(AR) crs libgcc.a $(libgcc-objects)
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# mv -f libbfd.a $(SDK_DIR)/lib
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80
contrib/toolchain/gcc/5x/libgcc/auto-target.h
Normal file
80
contrib/toolchain/gcc/5x/libgcc/auto-target.h
Normal file
@ -0,0 +1,80 @@
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/* auto-target.h. Generated from config.in by configure. */
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/* config.in. Generated from configure.ac by autoheader. */
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/* Define to 1 if the target assembler supports thread-local storage. */
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/* #undef HAVE_CC_TLS */
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/* Define to 1 if you have the <ftw.h> header file. */
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/* #undef HAVE_FTW_H */
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/* Define if _Unwind_GetIPInfo is available. */
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#define HAVE_GETIPINFO 1
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/* Define if the compiler supports init priority. */
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#define HAVE_INIT_PRIORITY 1
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/* Define to 1 if you have the <inttypes.h> header file. */
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#define HAVE_INTTYPES_H 1
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/* Define to 1 if you have the <memory.h> header file. */
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#define HAVE_MEMORY_H 1
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/* Define if the system-provided CRTs are present on Solaris. */
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/* #undef HAVE_SOLARIS_CRTS */
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/* Define if the system-provided CRTs are present on Solaris. */
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/* #undef HAVE_SOLARIS_CRTS */
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/* Define to 1 if you have the <stdint.h> header file. */
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#define HAVE_STDINT_H 1
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/* Define to 1 if you have the <stdlib.h> header file. */
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#define HAVE_STDLIB_H 1
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/* Define to 1 if you have the <strings.h> header file. */
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#define HAVE_STRINGS_H 1
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/* Define to 1 if you have the <string.h> header file. */
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#define HAVE_STRING_H 1
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/* Define to 1 if you have the <sys/stat.h> header file. */
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#define HAVE_SYS_STAT_H 1
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/* Define to 1 if you have the <sys/types.h> header file. */
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#define HAVE_SYS_TYPES_H 1
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/* Define to 1 if you have the <unistd.h> header file. */
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#define HAVE_UNISTD_H 1
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/* Define if the C compiler is configured for setjmp/longjmp exceptions. */
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/* #undef LIBGCC_SJLJ_EXCEPTIONS */
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/* Define to the address where bug reports for this package should be sent. */
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#define PACKAGE_BUGREPORT ""
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/* Define to the full name of this package. */
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#define PACKAGE_NAME "GNU C Runtime Library"
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||||
|
||||
/* Define to the full name and version of this package. */
|
||||
#define PACKAGE_STRING "GNU C Runtime Library 1.0"
|
||||
|
||||
/* Define to the one symbol short name of this package. */
|
||||
#define PACKAGE_TARNAME "libgcc"
|
||||
|
||||
/* Define to the home page for this package. */
|
||||
#define PACKAGE_URL "http://www.gnu.org/software/libgcc/"
|
||||
|
||||
/* Define to the version of this package. */
|
||||
#define PACKAGE_VERSION "1.0"
|
||||
|
||||
/* The size of `double', as computed by sizeof. */
|
||||
#define SIZEOF_DOUBLE 8
|
||||
|
||||
/* The size of `long double', as computed by sizeof. */
|
||||
#define SIZEOF_LONG_DOUBLE 12
|
||||
|
||||
/* Define to 1 if you have the ANSI C header files. */
|
||||
#define STDC_HEADERS 1
|
||||
|
||||
/* Define to 1 if the target use emutls for thread-local storage. */
|
||||
#define USE_EMUTLS 1
|
85
contrib/toolchain/gcc/5x/libgcc/sfp-machine.h
Normal file
85
contrib/toolchain/gcc/5x/libgcc/sfp-machine.h
Normal file
@ -0,0 +1,85 @@
|
||||
#ifdef __MINGW32__
|
||||
/* Make sure we are using gnu-style bitfield handling. */
|
||||
#define _FP_STRUCT_LAYOUT __attribute__ ((gcc_struct))
|
||||
#endif
|
||||
|
||||
/* The type of the result of a floating point comparison. This must
|
||||
match `__libgcc_cmp_return__' in GCC for the target. */
|
||||
typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
|
||||
#define CMPtype __gcc_CMPtype
|
||||
|
||||
#ifdef __x86_64__
|
||||
#include "config/i386/64/sfp-machine.h"
|
||||
#else
|
||||
#include "config/i386/32/sfp-machine.h"
|
||||
#endif
|
||||
|
||||
#define _FP_KEEPNANFRACP 1
|
||||
#define _FP_QNANNEGATEDP 0
|
||||
|
||||
#define _FP_NANSIGN_S 1
|
||||
#define _FP_NANSIGN_D 1
|
||||
#define _FP_NANSIGN_E 1
|
||||
#define _FP_NANSIGN_Q 1
|
||||
|
||||
/* Here is something Intel misdesigned: the specs don't define
|
||||
the case where we have two NaNs with same mantissas, but
|
||||
different sign. Different operations pick up different NaNs. */
|
||||
#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
|
||||
do { \
|
||||
if (_FP_FRAC_GT_##wc(X, Y) \
|
||||
|| (_FP_FRAC_EQ_##wc(X,Y) && (OP == '+' || OP == '*'))) \
|
||||
{ \
|
||||
R##_s = X##_s; \
|
||||
_FP_FRAC_COPY_##wc(R,X); \
|
||||
} \
|
||||
else \
|
||||
{ \
|
||||
R##_s = Y##_s; \
|
||||
_FP_FRAC_COPY_##wc(R,Y); \
|
||||
} \
|
||||
R##_c = FP_CLS_NAN; \
|
||||
} while (0)
|
||||
|
||||
#ifndef _SOFT_FLOAT
|
||||
#define FP_EX_INVALID 0x01
|
||||
#define FP_EX_DENORM 0x02
|
||||
#define FP_EX_DIVZERO 0x04
|
||||
#define FP_EX_OVERFLOW 0x08
|
||||
#define FP_EX_UNDERFLOW 0x10
|
||||
#define FP_EX_INEXACT 0x20
|
||||
#define FP_EX_ALL \
|
||||
(FP_EX_INVALID | FP_EX_DENORM | FP_EX_DIVZERO | FP_EX_OVERFLOW \
|
||||
| FP_EX_UNDERFLOW | FP_EX_INEXACT)
|
||||
|
||||
void __sfp_handle_exceptions (int);
|
||||
|
||||
#define FP_HANDLE_EXCEPTIONS \
|
||||
do { \
|
||||
if (__builtin_expect (_fex, 0)) \
|
||||
__sfp_handle_exceptions (_fex); \
|
||||
} while (0);
|
||||
|
||||
#define FP_TRAPPING_EXCEPTIONS ((~_fcw >> FP_EX_SHIFT) & FP_EX_ALL)
|
||||
|
||||
#define FP_ROUNDMODE (_fcw & FP_RND_MASK)
|
||||
#endif
|
||||
|
||||
#define _FP_TININESS_AFTER_ROUNDING 1
|
||||
|
||||
#define __LITTLE_ENDIAN 1234
|
||||
#define __BIG_ENDIAN 4321
|
||||
|
||||
#define __BYTE_ORDER __LITTLE_ENDIAN
|
||||
|
||||
/* Define ALIASNAME as a strong alias for NAME. */
|
||||
#if defined __MACH__
|
||||
/* Mach-O doesn't support aliasing. If these functions ever return
|
||||
anything but CMPtype we need to revisit this... */
|
||||
#define strong_alias(name, aliasname) \
|
||||
CMPtype aliasname (TFtype a, TFtype b) { return name(a, b); }
|
||||
#else
|
||||
# define strong_alias(name, aliasname) _strong_alias(name, aliasname)
|
||||
# define _strong_alias(name, aliasname) \
|
||||
extern __typeof (name) aliasname __attribute__ ((alias (#name)));
|
||||
#endif
|
38
contrib/toolchain/gcc/5x/libgcc/static-object.mk
Normal file
38
contrib/toolchain/gcc/5x/libgcc/static-object.mk
Normal file
@ -0,0 +1,38 @@
|
||||
# This file is included several times in a row, once for each element of
|
||||
# $(iter-items). On each inclusion, we advance $o to the next element.
|
||||
|
||||
o := $(firstword $(iter-items))
|
||||
iter-items := $(filter-out $o,$(iter-items))
|
||||
|
||||
base := $(basename $(notdir $o))
|
||||
|
||||
# Copy c_flags to a rule-specific copy and use the copy, to avoid the
|
||||
# following rules being affected by later changes to c_flags in the
|
||||
# including file.
|
||||
c_flags-$o := $(c_flags)
|
||||
|
||||
ifeq ($(suffix $o),.c)
|
||||
|
||||
$(base)$(objext): $o
|
||||
$(gcc_compile) $(c_flags-$<) -c $< $(vis_hide)
|
||||
|
||||
else
|
||||
|
||||
ifneq ($(suffix $o),.S)
|
||||
ifneq ($(suffix $o),.asm)
|
||||
$(error Unsupported file type: $o)
|
||||
endif
|
||||
endif
|
||||
|
||||
as_flags-$o := -xassembler$(if $(filter .S,$(suffix $o)),-with-cpp)
|
||||
|
||||
$(base)$(objext): $o $(base).vis
|
||||
$(gcc_compile) -c $(as_flags-$<) -include $*.vis $<
|
||||
|
||||
$(base).vis: $(base)_s$(objext)
|
||||
$(gen-hide-list)
|
||||
|
||||
$(base)_s$(objext): $o
|
||||
$(gcc_s_compile) -c $(as_flags-$<) $<
|
||||
|
||||
endif
|
Loading…
Reference in New Issue
Block a user