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-rw-r--r--lib/libc/amd64/gen/Makefile.inc5
-rw-r--r--lib/libc/amd64/gen/_setjmp.S90
-rw-r--r--lib/libc/amd64/gen/fabs.S45
-rw-r--r--lib/libc/amd64/gen/flt_rounds.c23
-rw-r--r--lib/libc/amd64/gen/fpgetmask.c7
-rw-r--r--lib/libc/amd64/gen/fpgetprec.c7
-rw-r--r--lib/libc/amd64/gen/fpgetround.c7
-rw-r--r--lib/libc/amd64/gen/fpgetsticky.c7
-rw-r--r--lib/libc/amd64/gen/fpsetmask.c7
-rw-r--r--lib/libc/amd64/gen/fpsetprec.c7
-rw-r--r--lib/libc/amd64/gen/fpsetround.c7
-rw-r--r--lib/libc/amd64/gen/infinity.c11
-rw-r--r--lib/libc/amd64/gen/makecontext.c106
-rw-r--r--lib/libc/amd64/gen/setjmp.S111
-rw-r--r--lib/libc/amd64/gen/signalcontext.c105
-rw-r--r--lib/libc/amd64/gen/sigsetjmp.S112
16 files changed, 657 insertions, 0 deletions
diff --git a/lib/libc/amd64/gen/Makefile.inc b/lib/libc/amd64/gen/Makefile.inc
new file mode 100644
index 000000000000..aaffcb0481f1
--- /dev/null
+++ b/lib/libc/amd64/gen/Makefile.inc
@@ -0,0 +1,5 @@
+SRCS+= _setjmp.S setjmp.S sigsetjmp.S \
+ 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
diff --git a/lib/libc/amd64/gen/_setjmp.S b/lib/libc/amd64/gen/_setjmp.S
new file mode 100644
index 000000000000..93b27de49ea0
--- /dev/null
+++ b/lib/libc/amd64/gen/_setjmp.S
@@ -0,0 +1,90 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+/*
+ * C library -- _setjmp, _longjmp
+ *
+ * _longjmp(a,v)
+ * will generate a "return(v)" from the last call to
+ * _setjmp(a)
+ * by restoring registers from the environment 'a'.
+ * The previous signal state is NOT restored.
+ */
+
+ENTRY(_setjmp)
+ movq %rdi,%rax
+ movq 0(%rsp),%rdx /* return address */
+ movq %rdx, 0(%rax) /* 0; return address */
+ movq %rbx, 8(%rax) /* 1; rbx */
+ movq %rsp,16(%rax) /* 2; rsp */
+ movq %rbp,24(%rax) /* 3; rbp */
+ movq %r12,32(%rax) /* 4; r12 */
+ movq %r13,40(%rax) /* 5; r13 */
+ movq %r14,48(%rax) /* 6; r14 */
+ movq %r15,56(%rax) /* 7; r15 */
+ fnstcw 64(%rax) /* 8; fpu cw */
+ stmxcsr 68(%rax) /* and mxcsr */
+ xorq %rax,%rax
+ ret
+END(_setjmp)
+
+ WEAK_REFERENCE(___longjmp, _longjmp)
+ENTRY(___longjmp)
+ movq %rdi,%rdx
+ /* Restore the mxcsr, but leave exception flags intact. */
+ stmxcsr -4(%rsp)
+ movl 68(%rdx),%eax
+ andl $0xffffffc0,%eax
+ movl -4(%rsp),%edi
+ andl $0x3f,%edi
+ xorl %eax,%edi
+ movl %edi,-4(%rsp)
+ ldmxcsr -4(%rsp)
+ movq %rsi,%rax /* retval */
+ movq 0(%rdx),%rcx
+ movq 8(%rdx),%rbx
+ movq 16(%rdx),%rsp
+ movq 24(%rdx),%rbp
+ movq 32(%rdx),%r12
+ movq 40(%rdx),%r13
+ movq 48(%rdx),%r14
+ movq 56(%rdx),%r15
+ fldcw 64(%rdx)
+ testq %rax,%rax
+ jnz 1f
+ incq %rax
+1: movq %rcx,0(%rsp) /* return address */
+ ret
+END(___longjmp)
+
+ .section .note.GNU-stack,"",%progbits
diff --git a/lib/libc/amd64/gen/fabs.S b/lib/libc/amd64/gen/fabs.S
new file mode 100644
index 000000000000..8c7e4464d1f5
--- /dev/null
+++ b/lib/libc/amd64/gen/fabs.S
@@ -0,0 +1,45 @@
+/*-
+ * Copyright (c) 2004 Peter Wemm
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+/*
+ * Return floating point absolute value of a double.
+ */
+
+ .text
+ENTRY(fabs)
+ movsd %xmm0, %xmm1
+ movsd signbit(%rip), %xmm0
+ andnpd %xmm1, %xmm0
+ ret
+END(fabs)
+
+ .section .rodata
+ .p2align 3
+signbit:
+ .quad 0x8000000000000000
+
+ .section .note.GNU-stack,"",%progbits
diff --git a/lib/libc/amd64/gen/flt_rounds.c b/lib/libc/amd64/gen/flt_rounds.c
new file mode 100644
index 000000000000..cd7e501af5af
--- /dev/null
+++ b/lib/libc/amd64/gen/flt_rounds.c
@@ -0,0 +1,23 @@
+/*
+ * Written by J.T. Conklin, Apr 10, 1995
+ * Public domain.
+ */
+
+#include <float.h>
+
+static const int map[] = {
+ 1, /* round to nearest */
+ 3, /* round to zero */
+ 2, /* round to negative infinity */
+ 0 /* round to positive infinity */
+};
+
+int
+__flt_rounds(void)
+{
+ int x;
+
+ /* Assume that the x87 and the SSE unit agree on the rounding mode. */
+ __asm("fnstcw %0" : "=m" (x));
+ return (map[(x >> 10) & 0x03]);
+}
diff --git a/lib/libc/amd64/gen/fpgetmask.c b/lib/libc/amd64/gen/fpgetmask.c
new file mode 100644
index 000000000000..a1ab8a79c2ea
--- /dev/null
+++ b/lib/libc/amd64/gen/fpgetmask.c
@@ -0,0 +1,7 @@
+#define __IEEEFP_NOINLINES__ 1
+#include <ieeefp.h>
+
+fp_except_t fpgetmask(void)
+{
+ return __fpgetmask();
+}
diff --git a/lib/libc/amd64/gen/fpgetprec.c b/lib/libc/amd64/gen/fpgetprec.c
new file mode 100644
index 000000000000..eed244f3c36f
--- /dev/null
+++ b/lib/libc/amd64/gen/fpgetprec.c
@@ -0,0 +1,7 @@
+#define __IEEEFP_NOINLINES__ 1
+#include <ieeefp.h>
+
+fp_prec_t fpgetprec(void)
+{
+ return __fpgetprec();
+}
diff --git a/lib/libc/amd64/gen/fpgetround.c b/lib/libc/amd64/gen/fpgetround.c
new file mode 100644
index 000000000000..6d79bb9d30c6
--- /dev/null
+++ b/lib/libc/amd64/gen/fpgetround.c
@@ -0,0 +1,7 @@
+#define __IEEEFP_NOINLINES__ 1
+#include <ieeefp.h>
+
+fp_rnd_t fpgetround(void)
+{
+ return __fpgetround();
+}
diff --git a/lib/libc/amd64/gen/fpgetsticky.c b/lib/libc/amd64/gen/fpgetsticky.c
new file mode 100644
index 000000000000..842fb2cdf748
--- /dev/null
+++ b/lib/libc/amd64/gen/fpgetsticky.c
@@ -0,0 +1,7 @@
+#define __IEEEFP_NOINLINES__ 1
+#include <ieeefp.h>
+
+fp_except_t fpgetsticky(void)
+{
+ return __fpgetsticky();
+}
diff --git a/lib/libc/amd64/gen/fpsetmask.c b/lib/libc/amd64/gen/fpsetmask.c
new file mode 100644
index 000000000000..808144dce4b8
--- /dev/null
+++ b/lib/libc/amd64/gen/fpsetmask.c
@@ -0,0 +1,7 @@
+#define __IEEEFP_NOINLINES__ 1
+#include <ieeefp.h>
+
+fp_except_t fpsetmask(fp_except_t m)
+{
+ return (__fpsetmask(m));
+}
diff --git a/lib/libc/amd64/gen/fpsetprec.c b/lib/libc/amd64/gen/fpsetprec.c
new file mode 100644
index 000000000000..8fd0249652bd
--- /dev/null
+++ b/lib/libc/amd64/gen/fpsetprec.c
@@ -0,0 +1,7 @@
+#define __IEEEFP_NOINLINES__ 1
+#include <ieeefp.h>
+
+fp_prec_t fpsetprec(fp_prec_t m)
+{
+ return (__fpsetprec(m));
+}
diff --git a/lib/libc/amd64/gen/fpsetround.c b/lib/libc/amd64/gen/fpsetround.c
new file mode 100644
index 000000000000..a069ec2e372c
--- /dev/null
+++ b/lib/libc/amd64/gen/fpsetround.c
@@ -0,0 +1,7 @@
+#define __IEEEFP_NOINLINES__ 1
+#include <ieeefp.h>
+
+fp_rnd_t fpsetround(fp_rnd_t m)
+{
+ return (__fpsetround(m));
+}
diff --git a/lib/libc/amd64/gen/infinity.c b/lib/libc/amd64/gen/infinity.c
new file mode 100644
index 000000000000..bc05708abd2b
--- /dev/null
+++ b/lib/libc/amd64/gen/infinity.c
@@ -0,0 +1,11 @@
+/*
+ * infinity.c
+ */
+
+#include <math.h>
+
+/* bytes for +Infinity on a 387 */
+const union __infinity_un __infinity = { { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } };
+
+/* bytes for NaN */
+const union __nan_un __nan = { { 0, 0, 0xc0, 0xff } };
diff --git a/lib/libc/amd64/gen/makecontext.c b/lib/libc/amd64/gen/makecontext.c
new file mode 100644
index 000000000000..c5767c9d5d75
--- /dev/null
+++ b/lib/libc/amd64/gen/makecontext.c
@@ -0,0 +1,106 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2003 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/ucontext.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+typedef void (*func_t)(uint64_t, uint64_t, uint64_t, uint64_t, uint64_t,
+ uint64_t);
+
+/* Prototypes */
+static void makectx_wrapper(ucontext_t *ucp, func_t func, uint64_t *args);
+
+__weak_reference(__makecontext, makecontext);
+
+void
+__makecontext(ucontext_t *ucp, void (*start)(void), int argc, ...)
+{
+ uint64_t *args;
+ uint64_t *sp;
+ va_list ap;
+ int i;
+
+ /* A valid context is required. */
+ if ((ucp == NULL) || (ucp->uc_mcontext.mc_len != sizeof(mcontext_t)))
+ return;
+ else if ((argc < 0) || (argc > 6) || (ucp->uc_stack.ss_sp == NULL) ||
+ (ucp->uc_stack.ss_size < MINSIGSTKSZ)) {
+ /*
+ * This should really return -1 with errno set to ENOMEM
+ * or something, but the spec says that makecontext is
+ * a void function. At least make sure that the context
+ * isn't valid so it can't be used without an error.
+ */
+ ucp->uc_mcontext.mc_len = 0;
+ return;
+ }
+
+ /* Align the stack to 16 bytes. */
+ sp = (uint64_t *)(ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
+ sp = (uint64_t *)((uint64_t)sp & ~15UL);
+
+ /* Allocate space for a maximum of 6 arguments on the stack. */
+ args = sp - 6;
+
+ /*
+ * Account for arguments on stack and do the funky C entry alignment.
+ * This means that we need an 8-byte-odd alignment since the ABI expects
+ * the return address to be pushed, thus breaking the 16 byte alignment.
+ */
+ sp -= 7;
+
+ /* Add the arguments: */
+ va_start(ap, argc);
+ for (i = 0; i < argc; i++)
+ args[i] = va_arg(ap, uint64_t);
+ va_end(ap);
+ for (i = argc; i < 6; i++)
+ args[i] = 0;
+
+ ucp->uc_mcontext.mc_rdi = (register_t)ucp;
+ ucp->uc_mcontext.mc_rsi = (register_t)start;
+ ucp->uc_mcontext.mc_rdx = (register_t)args;
+ ucp->uc_mcontext.mc_rbp = 0;
+ ucp->uc_mcontext.mc_rbx = (register_t)sp;
+ ucp->uc_mcontext.mc_rsp = (register_t)sp;
+ ucp->uc_mcontext.mc_rip = (register_t)makectx_wrapper;
+}
+
+static void
+makectx_wrapper(ucontext_t *ucp, func_t func, uint64_t *args)
+{
+ (*func)(args[0], args[1], args[2], args[3], args[4], args[5]);
+ if (ucp->uc_link == NULL)
+ exit(0);
+ setcontext((const ucontext_t *)ucp->uc_link);
+ /* should never get here */
+ abort();
+ /* NOTREACHED */
+}
diff --git a/lib/libc/amd64/gen/setjmp.S b/lib/libc/amd64/gen/setjmp.S
new file mode 100644
index 000000000000..54939f123807
--- /dev/null
+++ b/lib/libc/amd64/gen/setjmp.S
@@ -0,0 +1,111 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+/*
+ * C library -- _setjmp, _longjmp
+ *
+ * longjmp(a,v)
+ * will generate a "return(v)" from the last call to
+ * setjmp(a)
+ * by restoring registers from the environment 'a'.
+ * The previous signal state is restored.
+ */
+
+#include "SYS.h"
+
+ENTRY(setjmp)
+ pushq %rdi
+ movq %rdi,%rcx
+ movq $1,%rdi /* SIG_BLOCK */
+ movq $0,%rsi /* (sigset_t*)set */
+ leaq 72(%rcx),%rdx /* 9,10; (sigset_t*)oset */
+ /* stack is 16-byte aligned */
+ call __libc_sigprocmask
+ popq %rdi
+ movq %rdi,%rcx
+ movq 0(%rsp),%rdx /* return address */
+ movq %rdx, 0(%rcx) /* 0; return address */
+ movq %rbx, 8(%rcx) /* 1; rbx */
+ movq %rsp,16(%rcx) /* 2; rsp */
+ movq %rbp,24(%rcx) /* 3; rbp */
+ movq %r12,32(%rcx) /* 4; r12 */
+ movq %r13,40(%rcx) /* 5; r13 */
+ movq %r14,48(%rcx) /* 6; r14 */
+ movq %r15,56(%rcx) /* 7; r15 */
+ fnstcw 64(%rcx) /* 8; fpu cw */
+ stmxcsr 68(%rcx) /* and mxcsr */
+ xorq %rax,%rax
+ ret
+END(setjmp)
+
+ WEAK_REFERENCE(__longjmp, longjmp)
+ENTRY(__longjmp)
+ pushq %rdi
+ pushq %rsi
+ movq %rdi,%rdx
+ movq $3,%rdi /* SIG_SETMASK */
+ leaq 72(%rdx),%rsi /* (sigset_t*)set */
+ movq $0,%rdx /* (sigset_t*)oset */
+ subq $0x8,%rsp /* make the stack 16-byte aligned */
+ call __libc_sigprocmask
+ addq $0x8,%rsp
+ popq %rsi
+ popq %rdi /* jmpbuf */
+ movq %rdi,%rdx
+ /* Restore the mxcsr, but leave exception flags intact. */
+ stmxcsr -4(%rsp)
+ movl 68(%rdx),%eax
+ andl $0xffffffc0,%eax
+ movl -4(%rsp),%edi
+ andl $0x3f,%edi
+ xorl %eax,%edi
+ movl %edi,-4(%rsp)
+ ldmxcsr -4(%rsp)
+ movq %rsi,%rax /* retval */
+ movq 0(%rdx),%rcx
+ movq 8(%rdx),%rbx
+ movq 16(%rdx),%rsp
+ movq 24(%rdx),%rbp
+ movq 32(%rdx),%r12
+ movq 40(%rdx),%r13
+ movq 48(%rdx),%r14
+ movq 56(%rdx),%r15
+ fldcw 64(%rdx)
+ testq %rax,%rax
+ jnz 1f
+ incq %rax
+1: movq %rcx,0(%rsp) /* return address */
+ ret
+END(__longjmp)
+
+ .section .note.GNU-stack,"",%progbits
diff --git a/lib/libc/amd64/gen/signalcontext.c b/lib/libc/amd64/gen/signalcontext.c
new file mode 100644
index 000000000000..a97dd158542a
--- /dev/null
+++ b/lib/libc/amd64/gen/signalcontext.c
@@ -0,0 +1,105 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2003 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/ucontext.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <strings.h>
+
+typedef void (*handler_t)(uint64_t, uint64_t, uint64_t);
+
+/* Prototypes */
+static void sigctx_wrapper(ucontext_t *ucp, handler_t func, uint64_t *args);
+
+__weak_reference(__signalcontext, signalcontext);
+
+int
+__signalcontext(ucontext_t *ucp, int sig, __sighandler_t *func)
+{
+ uint64_t *args;
+ siginfo_t *sig_si;
+ ucontext_t *sig_uc;
+ uint64_t sp;
+
+ /* Bail out if we don't have a valid ucontext pointer. */
+ if (ucp == NULL)
+ abort();
+
+ /*
+ * Build a signal frame and copy the arguments of signal handler
+ * 'func' onto the stack and do the funky stack alignment.
+ * This means that we need an 8-byte-odd alignment since the ABI expects
+ * the return address to be pushed, thus breaking the 16 byte alignment.
+ */
+ sp = (ucp->uc_mcontext.mc_rsp - 128 - sizeof(ucontext_t)) & ~15UL;
+ sig_uc = (ucontext_t *)sp;
+ bcopy(ucp, sig_uc, sizeof(*sig_uc));
+ sp = (sp - sizeof(siginfo_t)) & ~15UL;
+ sig_si = (siginfo_t *)sp;
+ bzero(sig_si, sizeof(*sig_si));
+ sig_si->si_signo = sig;
+ sp -= 3 * sizeof(uint64_t);
+ args = (uint64_t *)sp;
+ args[0] = sig;
+ args[1] = (intptr_t)sig_si;
+ args[2] = (intptr_t)sig_uc;
+ sp -= 16;
+
+ /*
+ * Setup the ucontext of the signal handler.
+ */
+ bzero(&ucp->uc_mcontext, sizeof(ucp->uc_mcontext));
+ ucp->uc_mcontext.mc_fpformat = _MC_FPFMT_NODEV;
+ ucp->uc_mcontext.mc_ownedfp = _MC_FPOWNED_NONE;
+ ucp->uc_link = sig_uc;
+ sigdelset(&ucp->uc_sigmask, sig);
+
+ ucp->uc_mcontext.mc_len = sizeof(mcontext_t);
+ ucp->uc_mcontext.mc_rdi = (register_t)ucp;
+ ucp->uc_mcontext.mc_rsi = (register_t)func;
+ ucp->uc_mcontext.mc_rdx = (register_t)args;
+ ucp->uc_mcontext.mc_rbp = (register_t)sp;
+ ucp->uc_mcontext.mc_rbx = (register_t)sp;
+ ucp->uc_mcontext.mc_rsp = (register_t)sp;
+ ucp->uc_mcontext.mc_rip = (register_t)sigctx_wrapper;
+ return (0);
+}
+
+static void
+sigctx_wrapper(ucontext_t *ucp, handler_t func, uint64_t *args)
+{
+
+ (*func)(args[0], args[1], args[2]);
+ if (ucp->uc_link == NULL)
+ exit(0);
+ setcontext((const ucontext_t *)ucp->uc_link);
+ /* should never get here */
+ abort();
+ /* NOTREACHED */
+}
diff --git a/lib/libc/amd64/gen/sigsetjmp.S b/lib/libc/amd64/gen/sigsetjmp.S
new file mode 100644
index 000000000000..c4775b1c2bea
--- /dev/null
+++ b/lib/libc/amd64/gen/sigsetjmp.S
@@ -0,0 +1,112 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+ .text
+ .asciz "$Id: sigsetjmp.S,v 1.1 1993/12/05 13:01:05 ats Exp $"
+#endif /* LIBC_SCCS and not lint */
+#include <machine/asm.h>
+#include "SYS.h"
+
+/*-
+ * TODO:
+ * Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp,
+ * remove the other *jmp functions and define everything in terms
+ * of the renamed functions. This requires compiler support for
+ * the renamed functions (introduced in gcc-2.5.3; previous versions
+ * only supported *jmp with 0 or 1 leading underscores).
+ *
+ * Restore _all_ the registers and the signal mask atomically. Can
+ * use sigreturn() if sigreturn() works.
+ */
+
+ENTRY(sigsetjmp)
+ movl %esi,88(%rdi) /* 11; savemask */
+ testl %esi,%esi
+ jz 2f
+ pushq %rdi
+ movq %rdi,%rcx
+ movq $1,%rdi /* SIG_BLOCK */
+ movq $0,%rsi /* (sigset_t*)set */
+ leaq 72(%rcx),%rdx /* 9,10 (sigset_t*)oset */
+ /* stack is 16-byte aligned */
+ call __libc_sigprocmask
+ popq %rdi
+2: movq %rdi,%rcx
+ movq 0(%rsp),%rdx /* return address */
+ movq %rdx, 0(%rcx) /* 0; return address */
+ movq %rbx, 8(%rcx) /* 1; rbx */
+ movq %rsp,16(%rcx) /* 2; rsp */
+ movq %rbp,24(%rcx) /* 3; rbp */
+ movq %r12,32(%rcx) /* 4; r12 */
+ movq %r13,40(%rcx) /* 5; r13 */
+ movq %r14,48(%rcx) /* 6; r14 */
+ movq %r15,56(%rcx) /* 7; r15 */
+ fnstcw 64(%rcx) /* 8; fpu cw */
+ xorq %rax,%rax
+ ret
+END(sigsetjmp)
+
+ WEAK_REFERENCE(__siglongjmp, siglongjmp)
+ENTRY(__siglongjmp)
+ cmpl $0,88(%rdi)
+ jz 2f
+ movq %rdi,%rdx
+ pushq %rdi
+ pushq %rsi
+ movq $3,%rdi /* SIG_SETMASK */
+ leaq 72(%rdx),%rsi /* (sigset_t*)set */
+ movq $0,%rdx /* (sigset_t*)oset */
+ subq $0x8,%rsp /* make the stack 16-byte aligned */
+ call __libc_sigprocmask
+ addq $0x8,%rsp
+ popq %rsi
+ popq %rdi /* jmpbuf */
+2: movq %rdi,%rdx
+ movq %rsi,%rax /* retval */
+ movq 0(%rdx),%rcx
+ movq 8(%rdx),%rbx
+ movq 16(%rdx),%rsp
+ movq 24(%rdx),%rbp
+ movq 32(%rdx),%r12
+ movq 40(%rdx),%r13
+ movq 48(%rdx),%r14
+ movq 56(%rdx),%r15
+ fldcw 64(%rdx)
+ testq %rax,%rax
+ jnz 1f
+ incq %rax
+1: movq %rcx,0(%rsp) /* return address */
+ ret
+END(__siglongjmp)
+
+ .section .note.GNU-stack,"",%progbits
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-07 20:56:19 +0000