Mercurial > repos > blastem
annotate mem.c @ 1479:a568dca999b2 nuklear_ui
Fix genesis save state loading via Nuklear UI, sms probably still needs work
author | Michael Pavone <pavone@retrodev.com> |
---|---|
date | Fri, 24 Nov 2017 20:52:40 -0800 |
parents | 101b5ce682fe |
children | 8e86cd581620 |
rev | line source |
---|---|
467
140af5509ce7
Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents:
18
diff
changeset
|
1 /* |
140af5509ce7
Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents:
18
diff
changeset
|
2 Copyright 2013 Michael Pavone |
883
9f149f0e98b7
It is now possible to switch back and forth between the menu ROM and the game
Michael Pavone <pavone@retrodev.com>
parents:
784
diff
changeset
|
3 This file is part of BlastEm. |
467
140af5509ce7
Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents:
18
diff
changeset
|
4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. |
140af5509ce7
Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents:
18
diff
changeset
|
5 */ |
14
2bdad0f52f42
x86 code gen, initial work on translator
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
6 #include <sys/mman.h> |
2bdad0f52f42
x86 code gen, initial work on translator
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
7 #include <stddef.h> |
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
14
diff
changeset
|
8 #include <stdint.h> |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
14
diff
changeset
|
9 #include <stdlib.h> |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
14
diff
changeset
|
10 #include <unistd.h> |
784
c3e3a0d734e2
Better error handling in alloc_code
Michael Pavone <pavone@retrodev.com>
parents:
759
diff
changeset
|
11 #include <errno.h> |
c3e3a0d734e2
Better error handling in alloc_code
Michael Pavone <pavone@retrodev.com>
parents:
759
diff
changeset
|
12 #include <stdio.h> |
758
b52cd6854c28
Use mmap with a hint rather than sbrk for allocating executable memory within 32-bit displacement range of compiled code
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
13 |
14
2bdad0f52f42
x86 code gen, initial work on translator
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
14 #include "mem.h" |
883
9f149f0e98b7
It is now possible to switch back and forth between the menu ROM and the game
Michael Pavone <pavone@retrodev.com>
parents:
784
diff
changeset
|
15 #include "arena.h" |
758
b52cd6854c28
Use mmap with a hint rather than sbrk for allocating executable memory within 32-bit displacement range of compiled code
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
16 #ifndef MAP_ANONYMOUS |
b52cd6854c28
Use mmap with a hint rather than sbrk for allocating executable memory within 32-bit displacement range of compiled code
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
17 #define MAP_ANONYMOUS MAP_ANON |
b52cd6854c28
Use mmap with a hint rather than sbrk for allocating executable memory within 32-bit displacement range of compiled code
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
18 #endif |
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
14
diff
changeset
|
19 |
759
c47e1750c264
Use MAP_32BIT on Linux since my hint seems to be ignored
Michael Pavone <pavone@retrodev.com>
parents:
758
diff
changeset
|
20 #ifndef MAP_32BIT |
c47e1750c264
Use MAP_32BIT on Linux since my hint seems to be ignored
Michael Pavone <pavone@retrodev.com>
parents:
758
diff
changeset
|
21 #define MAP_32BIT 0 |
c47e1750c264
Use MAP_32BIT on Linux since my hint seems to be ignored
Michael Pavone <pavone@retrodev.com>
parents:
758
diff
changeset
|
22 #endif |
c47e1750c264
Use MAP_32BIT on Linux since my hint seems to be ignored
Michael Pavone <pavone@retrodev.com>
parents:
758
diff
changeset
|
23 |
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
14
diff
changeset
|
24 void * alloc_code(size_t *size) |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
14
diff
changeset
|
25 { |
758
b52cd6854c28
Use mmap with a hint rather than sbrk for allocating executable memory within 32-bit displacement range of compiled code
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
26 //start at the 1GB mark to allow plenty of room for sbrk based malloc implementations |
b52cd6854c28
Use mmap with a hint rather than sbrk for allocating executable memory within 32-bit displacement range of compiled code
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
27 //while still keeping well within 32-bit displacement range for calling code compiled into the executable |
b52cd6854c28
Use mmap with a hint rather than sbrk for allocating executable memory within 32-bit displacement range of compiled code
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
28 static uint8_t *next = (uint8_t *)0x40000000; |
883
9f149f0e98b7
It is now possible to switch back and forth between the menu ROM and the game
Michael Pavone <pavone@retrodev.com>
parents:
784
diff
changeset
|
29 uint8_t *ret = try_alloc_arena(); |
9f149f0e98b7
It is now possible to switch back and forth between the menu ROM and the game
Michael Pavone <pavone@retrodev.com>
parents:
784
diff
changeset
|
30 if (ret) { |
9f149f0e98b7
It is now possible to switch back and forth between the menu ROM and the game
Michael Pavone <pavone@retrodev.com>
parents:
784
diff
changeset
|
31 return ret; |
9f149f0e98b7
It is now possible to switch back and forth between the menu ROM and the game
Michael Pavone <pavone@retrodev.com>
parents:
784
diff
changeset
|
32 } |
1340
101b5ce682fe
Fix some inconsequential issues in code for executable memory allocation noticed while tracking down a different issue
Michael Pavone <pavone@retrodev.com>
parents:
904
diff
changeset
|
33 if (*size & (PAGE_SIZE -1)) { |
101b5ce682fe
Fix some inconsequential issues in code for executable memory allocation noticed while tracking down a different issue
Michael Pavone <pavone@retrodev.com>
parents:
904
diff
changeset
|
34 *size += PAGE_SIZE - (*size & (PAGE_SIZE - 1)); |
101b5ce682fe
Fix some inconsequential issues in code for executable memory allocation noticed while tracking down a different issue
Michael Pavone <pavone@retrodev.com>
parents:
904
diff
changeset
|
35 } |
101b5ce682fe
Fix some inconsequential issues in code for executable memory allocation noticed while tracking down a different issue
Michael Pavone <pavone@retrodev.com>
parents:
904
diff
changeset
|
36 ret = mmap(next, *size, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_32BIT, -1, 0); |
784
c3e3a0d734e2
Better error handling in alloc_code
Michael Pavone <pavone@retrodev.com>
parents:
759
diff
changeset
|
37 if (ret == MAP_FAILED) { |
c3e3a0d734e2
Better error handling in alloc_code
Michael Pavone <pavone@retrodev.com>
parents:
759
diff
changeset
|
38 perror("alloc_code"); |
c3e3a0d734e2
Better error handling in alloc_code
Michael Pavone <pavone@retrodev.com>
parents:
759
diff
changeset
|
39 return NULL; |
c3e3a0d734e2
Better error handling in alloc_code
Michael Pavone <pavone@retrodev.com>
parents:
759
diff
changeset
|
40 } |
904
6bafe1988e8c
Actually call track_block in alloc_code
Michael Pavone <pavone@retrodev.com>
parents:
883
diff
changeset
|
41 track_block(ret); |
758
b52cd6854c28
Use mmap with a hint rather than sbrk for allocating executable memory within 32-bit displacement range of compiled code
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
42 next = ret + *size; |
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
14
diff
changeset
|
43 return ret; |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
14
diff
changeset
|
44 } |
758
b52cd6854c28
Use mmap with a hint rather than sbrk for allocating executable memory within 32-bit displacement range of compiled code
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
45 |