kamkow1
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83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
#include <libk/align.h>
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#include <libk/string.h>
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#include <limine/requests.h>
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#include <mm/pmm.h>
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#include <page_size.h>
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#include <stdint.h>
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#include <sys/debug.h>
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#define LACKS_UNISTD_H 1
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#define LACKS_SYS_MMAN_H 1
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#define LACKS_SYS_PARAM_H 1
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#define LACKS_FCNTL_H 1
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#define LACKS_SYS_TYPES_H 1
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#define LACKS_SCHED_H 1
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#define LACKS_ERRNO_H 1
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#define LACKS_STDLIB_H 1
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#define LACKS_TIME_H 1
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#define LACKS_STRINGS_H 1
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#define ABORT \
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{ \
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(void)0; \
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}
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#define MALLOC_ALIGNMENT 16
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#define HAVE_MORECORE 0
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#define NO_MALLOC_STATS 1
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#define USE_LOCKS 1
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#define MALLOC_FAILURE_ACTION \
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do { \
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DEBUG ("malloc failure\n"); \
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} while (0)
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#define EINVAL -1
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#define ENOMEM -1
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#define DEFAULT_MMAP_THRESHOLD 0
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#define open _open_dummy
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#define O_RDWR 0
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#define PROT_READ 0
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#define PROT_WRITE 0
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#define MAP_PRIVATE 0
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#define fprintf(...)
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int _open_dummy (const char* path, uint16_t modes) {
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(void)path, (void)modes;
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return 0;
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}
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void* mmap (void* addr, size_t size, int prot, int flags, int fd, size_t off) {
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(void)prot, (void)fd, (void)off, (void)flags;
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if (size == 0)
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return (void*)-1;
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size = div_align_up (size, PAGE_SIZE);
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physaddr_t p_addr = pmm_alloc (size);
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if (p_addr == PMM_ALLOC_ERR)
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return (void*)-1;
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struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
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uintptr_t a = (uintptr_t)(p_addr + hhdm->offset);
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memset ((void*)a, 0, size * PAGE_SIZE);
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return (void*)a;
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}
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int munmap (void* addr, size_t length) {
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if (length == 0)
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return 0;
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length = div_align_up (length, PAGE_SIZE);
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struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
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physaddr_t p_addr = (uintptr_t)addr - hhdm->offset;
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pmm_free (p_addr, length);
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return 0;
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}
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