summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--libc/sysdeps/linux/m68k/Makefile2
-rw-r--r--libc/sysdeps/linux/m68k/__longjmp.S24
-rw-r--r--libc/sysdeps/linux/m68k/bits/setjmp.h47
-rw-r--r--libc/sysdeps/linux/m68k/bsd-_setjmp.S24
-rw-r--r--libc/sysdeps/linux/m68k/bsd-setjmp.S23
-rw-r--r--libc/sysdeps/linux/m68k/clone.S75
-rw-r--r--libc/sysdeps/linux/m68k/setjmp.S101
7 files changed, 187 insertions, 109 deletions
diff --git a/libc/sysdeps/linux/m68k/Makefile b/libc/sysdeps/linux/m68k/Makefile
index f9f90ee44..2337a6ea7 100644
--- a/libc/sysdeps/linux/m68k/Makefile
+++ b/libc/sysdeps/linux/m68k/Makefile
@@ -36,7 +36,7 @@ CRT0=crt0.S
CRT0_OBJ=$(patsubst %.S,%.o, $(CRT0))
endif
-SSRC=setjmp.S vfork.S # longjmp.S _start.S clone.S
+SSRC= __longjmp.S bsd-_setjmp.S bsd-setjmp.S clone.S setjmp.S vfork.S
SOBJS=$(patsubst %.S,%.o, $(SSRC))
CSRC=ptrace.c
diff --git a/libc/sysdeps/linux/m68k/__longjmp.S b/libc/sysdeps/linux/m68k/__longjmp.S
new file mode 100644
index 000000000..d218f2ef5
--- /dev/null
+++ b/libc/sysdeps/linux/m68k/__longjmp.S
@@ -0,0 +1,24 @@
+
+/* Copyright (C) 2002, David McCullough <davidm@snapgear.com> */
+/* This file is released under the LGPL, any version you like */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+.globl __longjmp;
+.type __longjmp,@function
+.align 4; \
+__longjmp:
+ moveal %sp@(4), %a0
+ movel %sp@(8), %d0
+ bne 1f
+ movel #1, %d0
+1:
+ moveml %a0@(JB_REGS), %d2-%d7/%a2-%a7
+#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
+ fmovemx %a0@(JB_FPREGS), %fp2-%fp7
+#endif
+ movel %a0@(JB_PC), %sp@
+ rts
+
diff --git a/libc/sysdeps/linux/m68k/bits/setjmp.h b/libc/sysdeps/linux/m68k/bits/setjmp.h
index 2c2b3ee15..ea8045df7 100644
--- a/libc/sysdeps/linux/m68k/bits/setjmp.h
+++ b/libc/sysdeps/linux/m68k/bits/setjmp.h
@@ -1,36 +1,18 @@
-/* Copyright (C) 1997, 1998 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 the machine-dependent type `jmp_buf'. m68k version. */
+/* Copyright (C) 2002, David McCullough <davidm@snapgear.com> */
+/* This file is released under the LGPL, any version you like */
#ifndef _SETJMP_H
# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
#endif
+#ifndef _ASM
+
typedef struct
{
- /* There are eight 4-byte data registers, but D0 is not saved. */
- long int __dregs[7];
-
- /* There are six 4-byte address registers, plus the FP and SP. */
- int *__aregs[6];
- int *__fp;
- int *__sp;
+ unsigned long __dregs[6]; /* save d2 - d7 */
+ unsigned long __aregs[6]; /* save a2 - a7 */
+ unsigned long __pc; /* the return address */
#if defined __HAVE_68881__ || defined __HAVE_FPU__
/* There are eight floating point registers which
@@ -40,6 +22,21 @@ typedef struct
} __jmp_buf[1];
+#endif /* _ASM */
+
+#define JB_REGS 0
+#define JB_DREGS 0
+#define JB_AREGS 24
+#define JB_PC 48
+#define JB_FPREGS 52
+
+#if defined __HAVE_68881__ || defined __HAVE_FPU__
+# define JB_SIZE 76
+#else
+# define JB_SIZE 52
+#endif
+
+
/* Test if longjmp to JMPBUF would unwind the frame
containing a local variable at ADDRESS. */
#define _JMPBUF_UNWINDS(jmpbuf, address) \
diff --git a/libc/sysdeps/linux/m68k/bsd-_setjmp.S b/libc/sysdeps/linux/m68k/bsd-_setjmp.S
new file mode 100644
index 000000000..0380c3dee
--- /dev/null
+++ b/libc/sysdeps/linux/m68k/bsd-_setjmp.S
@@ -0,0 +1,24 @@
+
+/* Copyright (C) 2002, David McCullough <davidm@snapgear.com> */
+/* This file is released under the LGPL, any version you like */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+.globl _setjmp;
+.type _setjmp,@function
+.align 4;
+
+_setjmp:
+ moveal %sp@(4), %a0
+ movel %sp@(0), %a0@(JB_PC)
+ moveml %d2-%d7/%a2-%a7, %a0@(JB_REGS)
+#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
+ fmovemx %fp2-%fp7, %a0@(JB_FPREGS)
+#endif
+ clrl %d0
+ movl %d0, JB_SIZE(%a0) /* No signal mask set. */
+ rts
+
+
diff --git a/libc/sysdeps/linux/m68k/bsd-setjmp.S b/libc/sysdeps/linux/m68k/bsd-setjmp.S
new file mode 100644
index 000000000..b83573c80
--- /dev/null
+++ b/libc/sysdeps/linux/m68k/bsd-setjmp.S
@@ -0,0 +1,23 @@
+
+/* Copyright (C) 2002, David McCullough <davidm@snapgear.com> */
+/* This file is released under the LGPL, any version you like */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+.globl setjmp;
+.type setjmp,@function
+.align 4;
+
+setjmp:
+ moveal %sp@(4), %a0
+ movel %sp@(0), %a0@(JB_PC)
+ moveml %d2-%d7/%a2-%a7, %a0@(JB_REGS)
+#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
+ fmovemx %fp2-%fp7, %a0@(JB_FPREGS)
+#endif
+ clrl %d0
+ lea __sigjmp_save-.-8, %a0
+ jmp 0(%pc, %a0)
+
diff --git a/libc/sysdeps/linux/m68k/clone.S b/libc/sysdeps/linux/m68k/clone.S
new file mode 100644
index 000000000..1f900685e
--- /dev/null
+++ b/libc/sysdeps/linux/m68k/clone.S
@@ -0,0 +1,75 @@
+/* Adapted from glibc */
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. */
+
+/* clone is even more special than fork as it mucks with stacks
+ and invokes a function in the right context after its all over. */
+
+#define _ERRNO_H
+#include <bits/errno.h>
+#include <sys/syscall.h>
+
+/* int _clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+
+.text
+.align 4
+.type __clone,@function
+.globl __clone;
+__clone:
+ /* Sanity check arguments. */
+ movel #-EINVAL, %d0
+ movel 4(%sp), %d1 /* no NULL function pointers */
+ movel %d1, %a0
+ tstl %d1
+ jeq syscall_error
+ movel 8(%sp), %d1 /* no NULL stack pointers */
+ movel %d1, %a1
+ tstl %d1
+ jeq syscall_error
+
+ /* Allocate space and copy the argument onto the new stack. */
+ movel 16(%sp), -(%a1)
+
+ /* Do the system call */
+#if 1 /* defined (CONFIG_COLDFIRE) */
+ movel %d2, %d1 /* save %d2 and get stack pointer */
+ movel %a1, %d2
+ movel %d1, %a1
+#else
+ exg %d2, %a1 /* save %d2 and get stack pointer */
+#endif
+ movel 12(%sp), %d1 /* get flags */
+ movel #__NR_clone, %d0
+ trap #0
+#if 1 /* defined (CONFIG_COLDFIRE) */
+ movel %d2, %d1 /* restore %d2 */
+ movel %a1, %d2
+ movel %d1, %a1
+#else
+ exg %d2, %a1 /* restore %d2 */
+#endif
+
+ tstl %d0
+ jmi syscall_error
+ jeq thread_start
+
+ rts
+
+syscall_error:
+ negl %d0
+ movel %d0, %sp@-
+ lea __errno_location-.-8, %a0
+ jsr 0(%pc, %a0)
+ movel %d0, %a0
+ movel %sp@+, %a0@
+ moveq #-1, %d0
+
+ rts
+
+thread_start:
+ /*subl %fp, %fp*/ /* terminate the stack frame */
+ jsr (%a0)
+ movel %d0, -(%sp)
+ movel #__NR_exit, %d0
+ trap #0
+ /*jsr exit*/
+
diff --git a/libc/sysdeps/linux/m68k/setjmp.S b/libc/sysdeps/linux/m68k/setjmp.S
index d104d78ac..d7ca5dd6d 100644
--- a/libc/sysdeps/linux/m68k/setjmp.S
+++ b/libc/sysdeps/linux/m68k/setjmp.S
@@ -1,88 +1,23 @@
-/* These are predefined by new versions of GNU cpp. */
-#ifndef __USER_LABEL_PREFIX__
-#define __USER_LABEL_PREFIX__ _
-#endif
-
-#ifndef __REGISTER_PREFIX__
-#define __REGISTER_PREFIX__
-#endif
-
-/* ANSI concatenation macros. */
-
-#define CONCAT1(a, b) CONCAT2(a, b)
-#define CONCAT2(a, b) a ## b
-
-/* Use the right prefix for global labels. */
-
-#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
+/* Copyright (C) 2002, David McCullough <davidm@snapgear.com> */
+/* This file is released under the LGPL, any version you like */
-/* Use the right prefix for registers. */
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
-#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
+.globl __sigsetjmp;
+.type __sigsetjmp,@function
+.align 4;
-#define d0 REG (d0)
-#define d1 REG (d1)
-#define d2 REG (d2)
-#define d3 REG (d3)
-#define d4 REG (d4)
-#define d5 REG (d5)
-#define d6 REG (d6)
-#define d7 REG (d7)
-#define a0 REG (a0)
-#define a1 REG (a1)
-#define a2 REG (a2)
-#define a3 REG (a3)
-#define a4 REG (a4)
-#define a5 REG (a5)
-#define a6 REG (a6)
-#define fp REG (fp)
-#define sp REG (sp)
-
-.global SYM (__setjmp)
-.global SYM (__longjmp)
-
-SYM (__setjmp):
- moveal sp@(4),a0
- movel sp@(0),a0@(12)
- movel sp,a0@(8)
- moveml d2-d7/a2-a6,a0@(20)
- clrl d0
- rts
-
-SYM (__longjmp):
- moveal sp@(4),a0
- movel sp@(8),d0
- bne 1f
- movel #1,d0
-1:
- moveml a0@(20),d2-d7/a2-a6
- moveal a0@(8),sp
- movel a0@(12),sp@
- rts
-
-#ifdef M68881
-.global SYM (__setjmp_68881)
-.global SYM (__longjmp_68881)
-
-SYM (__setjmp_68881):
- moveal sp@(4),a0
- movel sp@(0),a0@(12)
- movel sp,a0@(8)
- moveml d2-d7/a2-a6,a0@(20)
- fmovemx fp2-fp7,a0@(64)
- clrl d0
- rts
-
-SYM (__longjmp_68881):
- moveal sp@(4),a0
- fmovemx a0@(64),fp2-fp7
- movel sp@(8),d0
- bne 1f
- movel #1,d0
-1:
- moveml a0@(20),d2-d7/a2-a6
- moveal a0@(8),sp
- movel a0@(12),sp@
- rts
+__sigsetjmp:
+ moveal %sp@(4), %a0
+ movel %sp@(0), %a0@(JB_PC)
+ moveml %d2-%d7/%a2-%a7, %a0@(JB_REGS)
+#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
+ fmovemx %fp2-%fp7, %a0@(JB_FPREGS)
#endif
+ clrl %d0
+ lea __sigjmp_save-.-8, %a0
+ jmp 0(%pc, %a0)
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-17 11:14:55 +0000