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/* Copyright 2009-2016
* Kaz Kylheku <kaz@kylheku.com>
* Vancouver, Canada
* All rights reserved.
*
* Redistribution of this software in source and binary forms, with or without
* modification, is permitted provided that the following two conditions are met.
*
* Use of this software in any manner constitutes agreement with the disclaimer
* which follows the two conditions.
*
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DAMAGES, HOWEVER CAUSED,
* AND UNDER ANY THEORY OF LIABILITY, ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if __MINGW32__ || __CYGWIN__
#define DEFUN(NAME) \
.global _ ## NAME ; \
_ ## NAME: ;
#elif __APPLE__
#define DEFUN(NAME) \
.globl _ ## NAME ; \
_ ## NAME: ;
#elif __arm__ && !__thumb__
#define DEFUN(NAME) \
.text ; \
.align 4 ; \
.global NAME ; \
.type NAME, %function ; \
NAME: ;
#elif __arm__ && __thumb__
#define DEFUN(NAME) \
.text ; \
.align 4 ; \
.global NAME ; \
.thumb ; \
.thumb_func ; \
.type NAME, %function ; \
NAME: ;
#else
#define DEFUN(NAME) \
.global NAME ; \
.type NAME, @function ; \
NAME: ;
#endif
#if __arm__
#define SIGIL() %
#else
#define SIGIL() @
#endif
#if __i386__
#define JEIP 0
#define JESP 4
#define JEBP 8
#define JEBX 12
#define JESI 16
#define JEDI 20
#define RETA 0
#define ARG1 4
#define ARG2 8
DEFUN(jmp_save)
movl RETA(%esp), %ecx
movl ARG1(%esp), %eax
movl %ecx, JEIP(%eax)
leal ARG1(%esp), %ecx
movl %ecx, JESP(%eax)
movl %ebp, JEBP(%eax)
movl %ebx, JEBX(%eax)
movl %esi, JESI(%eax)
movl %edi, JEDI(%eax)
xorl %eax, %eax
ret
DEFUN(jmp_restore)
movl ARG1(%esp), %edx
movl ARG2(%esp), %eax
mov JEDI(%edx),%edi
mov JESI(%edx),%esi
mov JEBX(%edx),%ebx
mov JEBP(%edx),%ebp
mov JESP(%edx),%ecx
mov %ecx,%esp
mov JEIP(%edx),%ecx
jmp *%ecx
#elif __x86_64__
#define JRIP 0
#define JRSP 8
#define JRBP 16
#define JRBX 24
#define JR12 32
#define JR13 40
#define JR14 48
#define JR15 56
#define RETA 0
#define ARG2 8
DEFUN(jmp_save)
mov RETA(%rsp), %rdx
mov %rdx, JRIP(%rdi)
lea ARG2(%rsp), %rdx
mov %rdx, JRSP(%rdi)
mov %rbp, JRBP(%rdi)
mov %rbx, JRBX(%rdi)
mov %r12, JR12(%rdi)
mov %r13, JR13(%rdi)
mov %r14, JR14(%rdi)
mov %r15, JR15(%rdi)
xor %rax, %rax
ret
DEFUN(jmp_restore)
mov JR15(%rdi), %r15
mov JR14(%rdi), %r14
mov JR13(%rdi), %r13
mov JR12(%rdi), %r12
mov JRBX(%rdi), %rbx
mov JRBP(%rdi), %rbp
mov JRSP(%rdi), %rdx
mov %rdx, %rsp
mov JRIP(%rdi), %rdx
mov %rsi, %rax
jmp *%rdx
#elif __arm__ && !__thumb__
DEFUN(jmp_save)
stmia r0, {r4, r5, r6, r7, r8, r9, r10, fp, sp, lr}
mov r0, #0
bx lr
DEFUN(jmp_restore)
ldmia r0, {r4, r5, r6, r7, r8, r9, r10, fp, sp, lr}
mov r0, r1
bx lr
#elif __arm__ && __thumb__
DEFUN(jmp_save)
mov r2, r0
mov r3, lr
stmia r0!, {r3, r4, r5, r6, r7}
mov r3, r8
mov r4, r9
mov r5, r10
mov r6, fp
mov r7, sp
stmia r0!, {r3, r4, r5, r6, r7}
ldmia r2!, {r3, r4, r5, r6, r7}
mov r0, #0
bx lr
DEFUN(jmp_restore)
mov r2, r0
add r0, #5*4
ldmia r0!, {r3, r4, r5, r6, r7}
mov r8, r3
mov r9, r4
mov r10, r5
mov fp, r6
mov sp, r7
ldmia r2!, {r3, r4, r5, r6, r7}
mov r0, r1
bx r3
#elif __PPC64__
DEFUN(jmp_save)
mflr %r11
mfcr %r12
std %r1, 0(%r3)
std %r2, 8(%r3)
std %r11, 16(%r3)
std %r12, 24(%r3)
std %r13, 32(%r3)
std %r14, 40(%r3)
std %r15, 48(%r3)
std %r16, 56(%r3)
std %r17, 64(%r3)
std %r18, 72(%r3)
std %r19, 80(%r3)
std %r20, 88(%r3)
std %r21, 96(%r3)
std %r22, 104(%r3)
std %r23, 112(%r3)
std %r24, 120(%r3)
std %r25, 128(%r3)
std %r26, 136(%r3)
std %r27, 144(%r3)
std %r28, 152(%r3)
std %r29, 160(%r3)
std %r30, 168(%r3)
std %r31, 176(%r3)
li %r3, 0
blr
DEFUN(jmp_restore)
ld %r31, 176(%r3)
ld %r30, 168(%r3)
ld %r29, 160(%r3)
ld %r28, 152(%r3)
ld %r27, 144(%r3)
ld %r26, 136(%r3)
ld %r25, 128(%r3)
ld %r24, 120(%r3)
ld %r23, 112(%r3)
ld %r22, 104(%r3)
ld %r21, 96(%r3)
ld %r20, 88(%r3)
ld %r17, 64(%r3)
ld %r19, 80(%r3)
ld %r18, 72(%r3)
ld %r16, 56(%r3)
ld %r15, 48(%r3)
ld %r14, 40(%r3)
ld %r13, 32(%r3)
ld %r12, 24(%r3)
ld %r11, 16(%r3)
ld %r2, 8(%r3)
ld %r1, 0(%r3)
mtcr %r12
mtlr %r11
mr %r3, %r4
blr
#else
#error port me!
#endif
#if !defined(__APPLE__) && !defined(__MINGW32__) && !defined(__CYGWIN__)
/* This is needed so our assembly code doesn't cause
the program to require an executable stack! */
.section .note.GNU-stack,"",SIGIL()progbits
#endif
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