Mercurial > repos > blastem
view mem.c @ 2005:3ce38692a3f2
Set initial pan bits in YM2612 register array and not just the separate lr field of the channel. This fixes an issue in which some channels would be silent in VGM log output
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 11 Oct 2020 22:42:10 -0700 |
parents | 101b5ce682fe |
children | 8e86cd581620 |
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/* Copyright 2013 Michael Pavone This file is part of BlastEm. BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. */ #include <sys/mman.h> #include <stddef.h> #include <stdint.h> #include <stdlib.h> #include <unistd.h> #include <errno.h> #include <stdio.h> #include "mem.h" #include "arena.h" #ifndef MAP_ANONYMOUS #define MAP_ANONYMOUS MAP_ANON #endif #ifndef MAP_32BIT #define MAP_32BIT 0 #endif void * alloc_code(size_t *size) { //start at the 1GB mark to allow plenty of room for sbrk based malloc implementations //while still keeping well within 32-bit displacement range for calling code compiled into the executable static uint8_t *next = (uint8_t *)0x40000000; uint8_t *ret = try_alloc_arena(); if (ret) { return ret; } if (*size & (PAGE_SIZE -1)) { *size += PAGE_SIZE - (*size & (PAGE_SIZE - 1)); } ret = mmap(next, *size, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_32BIT, -1, 0); if (ret == MAP_FAILED) { perror("alloc_code"); return NULL; } track_block(ret); next = ret + *size; return ret; }