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[wine] / libs / wine / port.c
1 /*
2  * Wine portability routines
3  *
4  * Copyright 2000 Alexandre Julliard
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19  */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <stdlib.h>
25 #include <string.h>
26 #include <sys/types.h>
27
28 #include "wine/library.h"
29 #include "wine/pthread.h"
30
31 static struct wine_pthread_functions pthread_functions;
32
33 /***********************************************************************
34  *           wine_pthread_get_functions
35  */
36 void wine_pthread_get_functions( struct wine_pthread_functions *functions, size_t size )
37 {
38     memcpy( functions, &pthread_functions, min( size, sizeof(pthread_functions) ));
39 }
40
41
42 /***********************************************************************
43  *           wine_pthread_set_functions
44  */
45 void wine_pthread_set_functions( const struct wine_pthread_functions *functions, size_t size )
46 {
47     memcpy( &pthread_functions, functions, min( size, sizeof(pthread_functions) ));
48 }
49
50
51 /***********************************************************************
52  *           wine_switch_to_stack
53  *
54  * Switch to the specified stack and call the function.
55  */
56 void DECLSPEC_NORETURN wine_switch_to_stack( void (*func)(void *), void *arg, void *stack );
57 #if defined(__i386__) && defined(__GNUC__)
58 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
59                    "movl 4(%esp),%ecx\n\t"  /* func */
60                    "movl 8(%esp),%edx\n\t"  /* arg */
61                    "movl 12(%esp),%esp\n\t"  /* stack */
62                    "andl $~15,%esp\n\t"
63                    "subl $12,%esp\n\t"
64                    "pushl %edx\n\t"
65                    "xorl %ebp,%ebp\n\t"
66                    "call *%ecx\n\t"
67                    "int $3" /* we never return here */ )
68 #elif defined(__i386__) && defined(_MSC_VER)
69 __declspec(naked) void wine_switch_to_stack( void (*func)(void *), void *arg, void *stack )
70 {
71   __asm mov ecx, 4[esp];
72   __asm mov edx, 8[esp];
73   __asm mov esp, 12[esp];
74   __asm push edx;
75   __asm xor ebp, ebp;
76   __asm call [ecx];
77   __asm int 3;
78 }
79 #elif defined(__sparc__) && defined(__GNUC__)
80 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
81                    "mov %o0, %l0\n\t" /* store first argument */
82                    "mov %o1, %l1\n\t" /* store second argument */
83                    "sub %o2, 96, %sp\n\t" /* store stack */
84                    "call %l0, 0\n\t" /* call func */
85                    "mov %l1, %o0\n\t" /* delay slot:  arg for func */
86                    "ta 0x01") /* breakpoint - we never get here */
87 #elif defined(__powerpc__) && defined(__APPLE__)
88 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
89                    "mtctr r3\n\t" /* func -> ctr */
90                    "mr r3,r4\n\t" /* args -> function param 1 (r3) */
91                    "mr r1,r5\n\t" /* stack */
92                    "subi r1,r1,0x100\n\t" /* adjust stack pointer */
93                    "bctrl\n" /* call ctr */
94                    "1:\tb 1b") /* loop */
95 #elif defined(__powerpc__) && defined(__GNUC__)
96 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
97                    "mtctr 3\n\t" /* func -> ctr */
98                    "mr 3,4\n\t" /* args -> function param 1 (r3) */
99                    "mr 1,5\n\t" /* stack */
100                    "subi 1, 1, 16\n\t" /* allocate space for the callee */
101                    "li 0, 0\n\t" /* load zero */
102                    "stw 0, 0(1)\n\t" /* create a bottom stack frame */
103                    "bctrl\n\t" /* call ctr */
104                    "1:\tb 1b") /* loop */
105 #elif defined(__ALPHA__) && defined(__GNUC__)
106 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
107                    "mov $16,$0\n\t" /* func */
108                    "mov $17,$16\n\t" /* arg */
109                    "mov $18,$30\n\t" /* stack */
110                    "jsr $31,($0),0\n\t" /* call func */
111                    "L1:\tbr $31,L1") /* loop */
112 #elif defined(__x86_64__) && defined(__GNUC__)
113 __ASM_GLOBAL_FUNC( wine_switch_to_stack,
114                    "movq %rdi,%rax\n\t" /* func */
115                    "movq %rsi,%rdi\n\t" /* arg */
116                    "andq $~15,%rdx\n\t" /* stack */
117                    "movq %rdx,%rsp\n\t"
118                    "xorq %rbp,%rbp\n\t"
119                    "callq *%rax\n\t"    /* call func */
120                    "int $3")
121 #else
122 void DECLSPEC_NORETURN wine_switch_to_stack( void (*func)(void *), void *arg, void *stack )
123 {
124     wine_call_on_stack( (int (*)(void *))func, arg, stack );
125     abort();
126 }
127 #endif
128
129
130 /***********************************************************************
131  *           wine_call_on_stack
132  *
133  * Switch to the specified stack to call the function and return.
134  */
135 int wine_call_on_stack( int (*func)(void *), void *arg, void *stack );
136 #if defined(__i386__) && defined(__GNUC__)
137 __ASM_GLOBAL_FUNC( wine_call_on_stack,
138                    "pushl %ebp\n\t"
139                    "pushl %esi\n\t"
140                    "movl 12(%esp),%ecx\n\t"  /* func */
141                    "movl 16(%esp),%edx\n\t"  /* arg */
142                    "movl 20(%esp),%esi\n\t"  /* stack */
143                    "andl $~15,%esi\n\t"
144                    "subl $12,%esi\n\t"
145                    "xchgl %esi,%esp\n\t"
146                    "pushl %edx\n\t"
147                    "xorl %ebp,%ebp\n\t"
148                    "call *%ecx\n\t"
149                    "movl %esi,%esp\n\t"
150                    "popl %esi\n\t"
151                    "popl %ebp\n\t"
152                    "ret" )
153 #elif defined(__i386__) && defined(_MSC_VER)
154 __declspec(naked) int wine_call_on_stack( int (*func)(void *), void *arg, void *stack )
155 {
156   __asm push ebp;
157   __asm push esi;
158   __asm mov ecx, 12[esp];
159   __asm mov edx, 16[esp];
160   __asm mov esi, 20[esp];
161   __asm xchg esp, esi;
162   __asm push edx;
163   __asm xor ebp, ebp;
164   __asm call [ecx];
165   __asm mov esp, esi;
166   __asm pop esi;
167   __asm pop ebp
168   __asm ret;
169 }
170 #elif defined(__x86_64__) && defined(__GNUC__)
171 __ASM_GLOBAL_FUNC( wine_call_on_stack,
172                    "pushq %rbp\n\t"
173                    "pushq %rbx\n\t"
174                    "movq %rsp,%rbx\n\t"
175                    "movq %rdi,%rax\n\t" /* func */
176                    "movq %rsi,%rdi\n\t" /* arg */
177                    "andq $~15,%rdx\n\t" /* stack */
178                    "movq %rdx,%rsp\n\t"
179                    "xorq %rbp,%rbp\n\t"
180                    "callq *%rax\n\t"    /* call func */
181                    "movq %rbx,%rsp\n\t"
182                    "popq %rbx\n\t"
183                    "popq %rbp\n\t"
184                    "ret")
185 #elif defined(__powerpc__) && defined(__GNUC__)
186 __ASM_GLOBAL_FUNC( wine_call_on_stack,
187                    "mflr 0\n\t"         /* get return address */
188                    "stw 0, 4(1)\n\t"    /* save return address */
189                    "subi 5, 5, 16\n\t" /* reserve space on new stack */
190                    "stw 1, 12(5)\n\t"   /* store old sp */
191                    "mtctr 3\n\t"        /* func -> ctr */
192                    "mr 3,4\n\t"         /* args -> function param 1 (r3) */
193                    "mr 1,5\n\t"         /* stack */
194                    "li 0, 0\n\t"        /* zero */
195                    "stw 0, 0(1)\n\t"    /* bottom of stack */
196                    "stwu 1, -16(1)\n\t" /* create a frame for this function */
197                    "bctrl\n\t"          /* call ctr */
198                    "lwz 1, 28(1)\n\t"   /* fetch old sp */
199                    "lwz 0, 4(1)\n\t"    /* fetch return address */
200                    "mtlr 0\n\t"         /* return address -> lr */
201                    "blr")               /* return */
202 #else
203 #error You must implement wine_switch_to_stack for your platform
204 #endif