7 files changed, 353 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/x86_64/__longjmp.S b/libc/sysdeps/linux/x86_64/__longjmp.S
new file mode 100644
index 000000000..40e459e27
--- /dev/null
+++ b/libc/sysdeps/linux/x86_64/__longjmp.S
@@ -0,0 +1,45 @@
+/* Copyright (C) 2001, 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+/* Jump to the position specified by ENV, causing the
+   setjmp call there to return VAL, or 1 if VAL is 0.
+   void __longjmp (__jmp_buf env, int val).  */
+.globl __longjmp;
+.type	__longjmp,@function;
+.align 16;
+__longjmp:
+	/* Restore registers.  */
+	movq (JB_RBX*8)(%rdi),%rbx
+	movq (JB_RBP*8)(%rdi),%rbp
+	movq (JB_R12*8)(%rdi),%r12
+	movq (JB_R13*8)(%rdi),%r13
+	movq (JB_R14*8)(%rdi),%r14
+	movq (JB_R15*8)(%rdi),%r15
+	/* Set return value for setjmp.  */
+	test %esi,%esi
+	mov $01,%eax
+	cmove %eax,%esi
+	mov %esi, %eax
+	movq (JB_PC*8)(%rdi),%rdx
+	movq (JB_RSP*8)(%rdi),%rsp
+	jmpq *%rdx
+.size __longjmp,.-__longjmp;
diff --git a/libc/sysdeps/linux/x86_64/brk.c b/libc/sysdeps/linux/x86_64/brk.c
new file mode 100644
index 000000000..303b5c0de
--- /dev/null
+++ b/libc/sysdeps/linux/x86_64/brk.c
@@ -0,0 +1,44 @@
+/* brk system call for Linux/x86_64.
+   Copyright (C) 1995, 1996, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+/* This must be initialized data because commons can't have aliases.  */
+void *__curbrk = 0;
+
+int brk (void *addr)
+{
+	void *__unbounded newbrk;
+
+	asm ("syscall\n"
+	     : "=a" (newbrk)
+	     : "0" (__NR_brk), "D" (__ptrvalue (addr))
+	     : "r11","rcx","memory");
+
+	__curbrk = newbrk;
+
+	if (newbrk < addr) {
+		__set_errno (ENOMEM);
+		return -1;
+	}
+
+	return 0;
+}
diff --git a/libc/sysdeps/linux/x86_64/bsd-_setjmp.S b/libc/sysdeps/linux/x86_64/bsd-_setjmp.S
new file mode 100644
index 000000000..89676bf5f
--- /dev/null
+++ b/libc/sysdeps/linux/x86_64/bsd-_setjmp.S
@@ -0,0 +1,34 @@
+/* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'.  i386 version.
+   Copyright (C) 1994,1995,1996,1997,2000,2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
+   We cannot do it in C because it must be a tail-call, so frame-unwinding
+   in setjmp doesn't clobber the state restored by longjmp.  */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+.globl _setjmp;
+.type    _setjmp,@function
+.align 16;
+_setjmp:
+	xorq %rsi, %rsi
+	jmp __sigsetjmp
+.size _setjmp,.-_setjmp;
diff --git a/libc/sysdeps/linux/x86_64/bsd-setjmp.S b/libc/sysdeps/linux/x86_64/bsd-setjmp.S
new file mode 100644
index 000000000..340d59642
--- /dev/null
+++ b/libc/sysdeps/linux/x86_64/bsd-setjmp.S
@@ -0,0 +1,30 @@
+/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'.  i386 version.
+   Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+.globl setjmp;
+.type    setjmp,@function
+.align 16;
+setjmp:
+	movq $1, %rsi
+	jmp __sigsetjmp
+.size setjmp,.-setjmp;
diff --git a/libc/sysdeps/linux/x86_64/crtn.S b/libc/sysdeps/linux/x86_64/crtn.S
new file mode 100644
index 000000000..292e499a7
--- /dev/null
+++ b/libc/sysdeps/linux/x86_64/crtn.S
@@ -0,0 +1,19 @@
+/* glibc's sysdeps/x86_64/elf/initfini.c used for reference [EPILOG] */
+
+.file	"initfini.c"
+
+
+.section .init
+.globl _init
+.type	_init, @function
+	addq	$8, %rsp
+	ret
+.size	_init, .-_init
+
+
+.section .fini
+.globl _fini
+.type	_fini, @function
+	addq	$8, %rsp
+	ret
+.size	_fini, .-_fini
diff --git a/libc/sysdeps/linux/x86_64/setjmp.S b/libc/sysdeps/linux/x86_64/setjmp.S
new file mode 100644
index 000000000..cb560248b
--- /dev/null
+++ b/libc/sysdeps/linux/x86_64/setjmp.S
@@ -0,0 +1,46 @@
+/* setjmp for x86-64.
+   Copyright (C) 2001, 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+.globl __sigsetjmp;
+.type    __sigsetjmp,@function
+.align 4;
+__sigsetjmp:
+	/* Save registers.  */
+	movq %rbx, (JB_RBX*8)(%rdi)
+	movq %rbp, (JB_RBP*8)(%rdi)
+	movq %r12, (JB_R12*8)(%rdi)
+	movq %r13, (JB_R13*8)(%rdi)
+	movq %r14, (JB_R14*8)(%rdi)
+	movq %r15, (JB_R15*8)(%rdi)
+	leaq 8(%rsp), %rdx	/* Save SP as it will be after we return.  */
+	movq %rdx, (JB_RSP*8)(%rdi)
+	movq (%rsp), %rax	/* Save PC we are returning to now.  */
+	movq %rax, (JB_PC*8)(%rdi)
+
+	/* Make a tail call to __sigjmp_save; it takes the same args.  */
+#ifdef	__PIC__
+	jmp __sigjmp_save@PLT
+#else
+	jmp __sigjmp_save
+#endif
+.size __sigsetjmp,.-__sigsetjmp;
diff --git a/libc/sysdeps/linux/x86_64/sigaction.c b/libc/sysdeps/linux/x86_64/sigaction.c
new file mode 100644
index 000000000..217fd2ae1
--- /dev/null
+++ b/libc/sysdeps/linux/x86_64/sigaction.c
@@ -0,0 +1,135 @@
+/* POSIX.1 `sigaction' call for Linux/x86-64.
+   Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/syscall.h>
+#include <bits/kernel_sigaction.h>
+
+#define SA_RESTORER 0x04000000
+
+
+#if defined __NR_rt_sigaction
+#warning "Yes there are two warnings here.  Don't worry about it."
+static void restore_rt (void) asm ("__restore_rt");
+static void restore (void) asm ("__restore");
+
+/* If ACT is not NULL, change the action for SIG to *ACT.
+   If OACT is not NULL, put the old action for SIG in *OACT.  */
+int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
+{
+	int result;
+	struct kernel_sigaction kact, koact;
+
+	if (act) {
+		kact.k_sa_handler = act->sa_handler;
+		memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
+		kact.sa_flags = act->sa_flags | SA_RESTORER;
+
+		kact.sa_restorer = &restore_rt;
+	}
+
+	/* XXX The size argument hopefully will have to be changed to the
+	   real size of the user-level sigset_t.  */
+	result = INLINE_SYSCALL (rt_sigaction, 4,
+	                         sig, act ? __ptrvalue (&kact) : NULL,
+	                         oact ? __ptrvalue (&koact) : NULL, _NSIG / 8);
+	if (oact && result >= 0) {
+		oact->sa_handler = koact.k_sa_handler;
+		memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
+		oact->sa_flags = koact.sa_flags;
+		oact->sa_restorer = koact.sa_restorer;
+	}
+	return result;
+}
+#else
+
+#warning "Yes there is a warning here.  Don't worry about it."
+static void restore (void) asm ("__restore");
+
+/* If ACT is not NULL, change the action for SIG to *ACT.
+   If OACT is not NULL, put the old action for SIG in *OACT.  */
+int __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
+{
+	int result;
+	struct old_kernel_sigaction kact, koact;
+
+#ifdef SIGCANCEL
+	if (sig == SIGCANCEL) {
+		__set_errno (EINVAL);
+		return -1;
+	}
+#endif
+
+	if (act) {
+		kact.k_sa_handler = act->sa_handler;
+		kact.sa_mask = act->sa_mask.__val[0];
+		kact.sa_flags = act->sa_flags | SA_RESTORER;
+		kact.sa_restorer = &restore;
+	}
+
+	asm volatile ("syscall\n"
+	              : "=a" (result)
+	              : "0" (__NR_sigaction), "mr" (sig),
+	                "c" (act ? __ptrvalue (&kact) : 0),
+	                "d" (oact ? __ptrvalue (&koact) : 0));
+
+	if (result < 0) {
+		__set_errno(-result);
+		return -1;
+	}
+
+	if (oact) {
+		oact->sa_handler = koact.k_sa_handler;
+		oact->sa_mask.__val[0] = koact.sa_mask;
+		oact->sa_flags = koact.sa_flags;
+		oact->sa_restorer = koact.sa_restorer;
+	}
+	return result;
+}
+#endif
+
+weak_alias (__libc_sigaction, sigaction)
+
+/* NOTE: Please think twice before making any changes to the bits of
+   code below.  GDB needs some intimate knowledge about it to
+   recognize them as signal trampolines, and make backtraces through
+   signal handlers work right.  Important are both the names
+   (__restore_rt) and the exact instruction sequence.
+   If you ever feel the need to make any changes, please notify the
+   appropriate GDB maintainer.  */
+
+#define RESTORE(name, syscall) RESTORE2 (name, syscall)
+# define RESTORE2(name, syscall) \
+asm						\
+  (						\
+   ".text\n" \
+   ".align 16\n"				\
+   "__" #name ":\n"				\
+   "	movq $" #syscall ", %rax\n"		\
+   "	syscall\n"				\
+   );
+#ifdef __NR_rt_sigaction
+/* The return code for realtime-signals.  */
+RESTORE (restore_rt, __NR_rt_sigreturn)
+#endif
+#ifdef __NR_sigreturn
+RESTORE (restore, __NR_sigreturn)
+#endif