Date: Thu, 14 Feb 2019 14:02:34 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r344120 - in head/lib/libc: . amd64/gen i386/gen x86/gen Message-ID: <201902141402.x1EE2Ydo081284@repo.freebsd.org>
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Author: kib Date: Thu Feb 14 14:02:33 2019 New Revision: 344120 URL: https://svnweb.freebsd.org/changeset/base/344120 Log: Unify i386 and amd64 getcontextx.c, and use ifuncs while there. In particular, use ifuncs for __getcontextx_size(), also calculate the size of the extended save area in resolver. Same for __fillcontextx2(). Sponsored by: The FreeBSD Foundation MFC after: 1 week Added: head/lib/libc/x86/gen/ head/lib/libc/x86/gen/Makefile.inc (contents, props changed) head/lib/libc/x86/gen/getcontextx.c - copied, changed from r344117, head/lib/libc/amd64/gen/getcontextx.c Deleted: head/lib/libc/amd64/gen/getcontextx.c head/lib/libc/i386/gen/getcontextx.c Modified: head/lib/libc/Makefile head/lib/libc/amd64/gen/Makefile.inc head/lib/libc/i386/gen/Makefile.inc Modified: head/lib/libc/Makefile ============================================================================== --- head/lib/libc/Makefile Thu Feb 14 13:59:00 2019 (r344119) +++ head/lib/libc/Makefile Thu Feb 14 14:02:33 2019 (r344120) @@ -122,6 +122,7 @@ NOASM= .endif .if ${LIBC_ARCH} == "i386" || ${LIBC_ARCH} == "amd64" .include "${LIBC_SRCTOP}/x86/sys/Makefile.inc" +.include "${LIBC_SRCTOP}/x86/gen/Makefile.inc" .endif .if ${MK_NIS} != "no" CFLAGS+= -DYP Modified: head/lib/libc/amd64/gen/Makefile.inc ============================================================================== --- head/lib/libc/amd64/gen/Makefile.inc Thu Feb 14 13:59:00 2019 (r344119) +++ head/lib/libc/amd64/gen/Makefile.inc Thu Feb 14 14:02:33 2019 (r344120) @@ -2,7 +2,7 @@ # $FreeBSD$ SRCS+= _setjmp.S _set_tp.c rfork_thread.S setjmp.S sigsetjmp.S \ - fabs.S getcontextx.c \ + fabs.S \ infinity.c ldexp.c makecontext.c signalcontext.c \ flt_rounds.c fpgetmask.c fpsetmask.c fpgetprec.c fpsetprec.c \ fpgetround.c fpsetround.c fpgetsticky.c Modified: head/lib/libc/i386/gen/Makefile.inc ============================================================================== --- head/lib/libc/i386/gen/Makefile.inc Thu Feb 14 13:59:00 2019 (r344119) +++ head/lib/libc/i386/gen/Makefile.inc Thu Feb 14 14:02:33 2019 (r344120) @@ -2,5 +2,5 @@ # $FreeBSD$ SRCS+= _ctx_start.S _setjmp.S _set_tp.c fabs.S \ - flt_rounds.c getcontextx.c infinity.c ldexp.c makecontext.c \ + flt_rounds.c infinity.c ldexp.c makecontext.c \ rfork_thread.S setjmp.S signalcontext.c sigsetjmp.S Added: head/lib/libc/x86/gen/Makefile.inc ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/lib/libc/x86/gen/Makefile.inc Thu Feb 14 14:02:33 2019 (r344120) @@ -0,0 +1,6 @@ +# $FreeBSD$ + +.PATH: ${LIBC_SRCTOP}/x86/gen + +SRCS+= \ + getcontextx.c Copied and modified: head/lib/libc/x86/gen/getcontextx.c (from r344117, head/lib/libc/amd64/gen/getcontextx.c) ============================================================================== --- head/lib/libc/amd64/gen/getcontextx.c Thu Feb 14 09:50:59 2019 (r344117, copy source) +++ head/lib/libc/x86/gen/getcontextx.c Thu Feb 14 14:02:33 2019 (r344120) @@ -35,49 +35,76 @@ __FBSDID("$FreeBSD$"); #include <stdarg.h> #include <stdlib.h> #include <machine/cpufunc.h> -#include <machine/fpu.h> #include <machine/specialreg.h> #include <machine/sysarch.h> +#include <x86/ifunc.h> +#include <x86/fpu.h> -static int xstate_sz = -1; +#if defined __i386__ +#define X86_GET_XFPUSTATE I386_GET_XFPUSTATE +typedef struct savexmm savex86_t ; +typedef struct i386_get_xfpustate x86_get_xfpustate_t; +#elif defined __amd64__ +#define X86_GET_XFPUSTATE AMD64_GET_XFPUSTATE +typedef struct savefpu savex86_t; +typedef struct amd64_get_xfpustate x86_get_xfpustate_t; +#else +#error "Wrong arch" +#endif -int -__getcontextx_size(void) +static int xstate_sz = 0; + +static int +__getcontextx_size_xfpu(void) { + + return (sizeof(ucontext_t) + xstate_sz); +} + +DEFINE_UIFUNC(, int, __getcontextx_size, (void), static) +{ u_int p[4]; - if (xstate_sz == -1) { - do_cpuid(1, p); - if ((p[2] & CPUID2_OSXSAVE) != 0) { - cpuid_count(0xd, 0x0, p); - xstate_sz = p[1] - sizeof(struct savefpu); - } else - xstate_sz = 0; + if ((cpu_feature2 & CPUID2_OSXSAVE) != 0) { + cpuid_count(0xd, 0x0, p); + xstate_sz = p[1] - sizeof(savex86_t); } + return (__getcontextx_size_xfpu); +} - return (sizeof(ucontext_t) + xstate_sz); +static int +__fillcontextx2_xfpu(char *ctx) +{ + x86_get_xfpustate_t xfpu; + ucontext_t *ucp; + + ucp = (ucontext_t *)ctx; + xfpu.addr = (char *)(ucp + 1); + xfpu.len = xstate_sz; + if (sysarch(X86_GET_XFPUSTATE, &xfpu) == -1) + return (-1); + ucp->uc_mcontext.mc_xfpustate = (__register_t)xfpu.addr; + ucp->uc_mcontext.mc_xfpustate_len = xstate_sz; + ucp->uc_mcontext.mc_flags |= _MC_HASFPXSTATE; + return (0); } -int -__fillcontextx2(char *ctx) +static int +__fillcontextx2_noxfpu(char *ctx) { - struct amd64_get_xfpustate xfpu; ucontext_t *ucp; ucp = (ucontext_t *)ctx; - if (xstate_sz != 0) { - xfpu.addr = (char *)(ucp + 1); - xfpu.len = xstate_sz; - if (sysarch(AMD64_GET_XFPUSTATE, &xfpu) == -1) - return (-1); - ucp->uc_mcontext.mc_xfpustate = (__register_t)xfpu.addr; - ucp->uc_mcontext.mc_xfpustate_len = xstate_sz; - ucp->uc_mcontext.mc_flags |= _MC_HASFPXSTATE; - } else { - ucp->uc_mcontext.mc_xfpustate = 0; - ucp->uc_mcontext.mc_xfpustate_len = 0; - } + ucp->uc_mcontext.mc_xfpustate = 0; + ucp->uc_mcontext.mc_xfpustate_len = 0; return (0); +} + +DEFINE_UIFUNC(, int, __fillcontextx2, (char *), static) +{ + + return ((cpu_feature2 & CPUID2_OSXSAVE) != 0 ? __fillcontextx2_xfpu : + __fillcontextx2_noxfpu); } int
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