Add support for makecontext. This supports up to 8 arguments as this
simplifies the code, these can be passed in registers. Obtained from: ABT Systems Ltd Sponsored by: The FreeBSD Foundation
This commit is contained in:
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0fdeab7bc5
commit
249d5c7acc
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=285352
@ -28,6 +28,7 @@ FBSD_1.0 {
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vfork;
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brk;
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sbrk;
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makecontext;
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};
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FBSDprivate_1.0 {
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@ -35,4 +36,5 @@ FBSDprivate_1.0 {
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_end;
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curbrk;
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minbrk;
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__makecontext;
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};
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@ -1,10 +1,12 @@
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# $FreeBSD$
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SRCS+= fabs.S \
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SRCS+= _ctx_start.S \
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fabs.S \
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flt_rounds.c \
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fpgetmask.c \
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fpsetmask.c \
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ldexp.c \
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makecontext.c \
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_setjmp.S \
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_set_tp.c \
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setjmp.S \
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38
lib/libc/aarch64/gen/_ctx_start.S
Normal file
38
lib/libc/aarch64/gen/_ctx_start.S
Normal file
@ -0,0 +1,38 @@
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/*-
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* Copyright (c) 2015 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Andrew Turner under
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* sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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ENTRY(_ctx_start)
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blr x19 /* Call func from makecontext */
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mov x0, x20 /* Load ucp saved in makecontext */
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bl _C_LABEL(ctx_done)
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bl _C_LABEL(abort)
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END(_ctx_start)
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86
lib/libc/aarch64/gen/makecontext.c
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86
lib/libc/aarch64/gen/makecontext.c
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@ -0,0 +1,86 @@
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/*-
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* Copyright (c) 2015 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Andrew Turner under
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* sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <machine/armreg.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <ucontext.h>
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void _ctx_start(void);
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void
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ctx_done(ucontext_t *ucp)
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{
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if (ucp->uc_link == NULL) {
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exit(0);
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} else {
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setcontext((const ucontext_t *)ucp->uc_link);
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abort();
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}
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}
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__weak_reference(__makecontext, makecontext);
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void
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__makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
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{
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struct gpregs *gp;
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va_list ap;
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int i;
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/* A valid context is required. */
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if (ucp == NULL)
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return;
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if ((argc < 0) || (argc > 8))
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return;
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gp = &ucp->uc_mcontext.mc_gpregs;
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va_start(ap, argc);
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/* Pass up to eight arguments in x0-7. */
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for (i = 0; i < argc && i < 8; i++)
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gp->gp_x[i] = va_arg(ap, uint64_t);
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va_end(ap);
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/* Set the stack */
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gp->gp_sp = STACKALIGN(ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
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/* Arrange for return via the trampoline code. */
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gp->gp_elr = (__register_t)_ctx_start;
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gp->gp_x[19] = (__register_t)func;
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gp->gp_x[20] = (__register_t)ucp;
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}
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@ -12,9 +12,7 @@ NETBSD_ATF_TESTS_C+= clock_gettime_test
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NETBSD_ATF_TESTS_C+= connect_test
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NETBSD_ATF_TESTS_C+= dup_test
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NETBSD_ATF_TESTS_C+= fsync_test
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.if ${MACHINE} != "arm64" # ARM64TODO: Missing makecontext
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NETBSD_ATF_TESTS_C+= getcontext_test
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.endif
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NETBSD_ATF_TESTS_C+= getgroups_test
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NETBSD_ATF_TESTS_C+= getitimer_test
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NETBSD_ATF_TESTS_C+= getlogin_test
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