51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <linux/unistd.h>
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#define __NR_linux_open __NR_open
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#define __NR_linux_lseek __NR_lseek
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#define __NR_linux_read __NR_read
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#define __NR_linux_write __NR_write
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#define __NR_linux_close __NR_close
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#define __NR_linux_exit __NR_exit
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_syscall3(int,linux_open,const char *,filename,int,access,int,mode)
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_syscall3(int,linux_lseek,int,fd,int,offset,int,whence)
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_syscall3(int,linux_read,int,fd,void *,buf,int,size)
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_syscall3(int,linux_write,int,fd,const void *,buf,int,size)
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_syscall1(int,linux_close,int,fd)
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_syscall1(int,linux_exit,int,val)
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void exit(int val)
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{
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linux_exit(val);
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}
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void putstr(const char *s)
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{
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linux_write(1, s, strlen(s));
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}
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uint8_t *load_image(const char *filename)
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{
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int fd, size;
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uint8_t *p;
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fd = linux_open(filename, O_RDONLY, 0);
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if (fd < 0) {
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return NULL;
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}
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size = linux_lseek(fd, 0, SEEK_END);
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linux_lseek(fd, 0, SEEK_SET);
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p = malloc(size + 15);
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p = (void *)((unsigned long)p & ~15);
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linux_read(fd, p, size);
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linux_close(fd);
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return p;
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}
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