On Saturday 27 August 2011 21:07:31 André Barboza wrote: > Qual a versão do kernel?
2.6.37.6 > Qual erro? gcc memory.c memory.c:2:24: fatal error: linux/init.h: Arquivo ou diretório não encontrado compilation terminated. gcc paralelport.c paralelport.c:2:24: fatal error: linux/init.h: Arquivo ou diretório não encontrado compilation terminated. Os fontes do kernel estão instalados em /usr/src/linux. > > 2011/8/27 Jorge Barros de Abreu <[email protected]> > > > Olá. > > > > Preciso de ajuda com esse tutorial. O título é: > > > > Writing device drivers in Linux: A brief tutorial > > > > O link é: > > > > http://www.freesoftwaremagazine.com/node/1238/pdf > > > > Não consegui fazer a compilação do memory.c e nem do paralelport.c > > > > nem com gcc nem com makefile. > > > > memory.c > > ################### > > /* Necessary includes for device drivers */ > > #include <linux/init.h> > > #include <linux/config.h> > > #include <linux/module.h> > > #include <linux/kernel.h> /* printk() */ > > #include <linux/slab.h> /* kmalloc() */ > > #include <linux/fs.h> /* everything... */ > > #include <linux/errno.h> /* error codes */ > > #include <linux/types.h> /* size_t */ > > #include <linux/proc_fs.h> > > #include <linux/fcntl.h> /* O_ACCMODE */ > > #include <asm/system.h> /* cli(), *_flags */ > > #include <asm/uaccess.h> /* copy_from/to_user */ > > > > MODULE_LICENSE("Dual BSD/GPL"); > > > > /* Declaration of memory.c functions */ > > int memory_open(struct inode *inode, struct file *filp); > > int memory_release(struct inode *inode, struct file *filp); > > ssize_t memory_read(struct file *filp, char *buf, size_t count, loff_t > > *f_pos); > > ssize_t memory_write(struct file *filp, char *buf, size_t count, loff_t > > *f_pos); > > void memory_exit(void); > > int memory_init(void); > > > > /* Structure that declares the usual file */ > > /* access functions */ > > struct file_operations memory_fops = { > > > > read: memory_read, > > write: memory_write, > > open: memory_open, > > release: memory_release > > > > }; > > > > /* Declaration of the init and exit functions */ > > module_init(memory_init); > > module_exit(memory_exit); > > > > /* Global variables of the driver */ > > /* Major number */ > > int memory_major = 60; > > /* Buffer to store data */ > > char *memory_buffer; > > > > > > > > > > > > > > int memory_init(void) { > > > > int result; > > > > /* Registering device */ > > result = register_chrdev(memory_major, "memory", &memory_fops); > > if (result < 0) { > > > > printk( > > > > "<1>memory: cannot obtain major number %d\n", memory_major); > > > > return result; > > > > } > > > > /* Allocating memory for the buffer */ > > memory_buffer = kmalloc(1, GFP_KERNEL); > > if (!memory_buffer) { > > > > result = -ENOMEM; > > goto fail; > > > > } > > memset(memory_buffer, 0, 1); > > > > printk("<1>Inserting memory module\n"); > > return 0; > > > > fail: > > memory_exit(); > > return result; > > > > } > > > > > > > > > > > > > > void memory_exit(void) { > > > > /* Freeing the major number */ > > unregister_chrdev(memory_major, "memory"); > > > > /* Freeing buffer memory */ > > if (memory_buffer) { > > > > kfree(memory_buffer); > > > > } > > > > printk("<1>Removing memory module\n"); > > > > } > > > > > > > > > > > > > > int memory_open(struct inode *inode, struct file *filp) { > > > > /* Success */ > > return 0; > > > > } > > > > > > > > > > > > > > ssize_t memory_read(struct file *filp, char *buf, > > > > size_t count, loff_t *f_pos) { > > > > /* Transfering data to user space */ > > copy_to_user(buf,memory_buffer,1); > > > > /* Changing reading position as best suits */ > > if (*f_pos == 0) { > > > > *f_pos+=1; > > return 1; > > > > } else { > > > > return 0; > > > > } > > > > } > > > > > > > > > > > > ssize_t memory_write( struct file *filp, char *buf, > > > > size_t count, loff_t *f_pos) { > > > > char *tmp; > > > > tmp=buf+count-1; > > copy_from_user(memory_buffer,tmp,1); > > return 1; > > > > } > > > > > > > > Paralelport.c > > ################# > > /* Necessary includes for drivers */ > > #include <linux/init.h> > > #include <linux/config.h> > > #include <linux/module.h> > > #include <linux/kernel.h> /* printk() */ > > #include <linux/slab.h> /* kmalloc() */ > > #include <linux/fs.h> /* everything... */ > > #include <linux/errno.h> /* error codes */ > > #include <linux/types.h> /* size_t */ > > #include <linux/proc_fs.h> > > #include <linux/fcntl.h> /* O_ACCMODE */ > > #include <linux/ioport.h> > > #include <asm/system.h> /* cli(), *_flags */ > > #include <asm/uaccess.h> /* copy_from/to_user */ > > #include <asm/io.h> /* inb, outb */ > > > > MODULE_LICENSE("Dual BSD/GPL"); > > > > /* Function declaration of parlelport.c */ > > int parlelport_open(struct inode *inode, struct file *filp); > > int parlelport_release(struct inode *inode, struct file *filp); > > ssize_t parlelport_read(struct file *filp, char *buf, > > > > size_t count, loff_t *f_pos); > > > > ssize_t parlelport_write(struct file *filp, char *buf, > > > > size_t count, loff_t *f_pos); > > > > void parlelport_exit(void); > > int parlelport_init(void); > > > > /* Structure that declares the common */ > > /* file access fcuntions */ > > struct file_operations parlelport_fops = { > > > > read: parlelport_read, > > write: parlelport_write, > > open: parlelport_open, > > release: parlelport_release > > > > }; > > > > /* Driver global variables */ > > /* Major number */ > > int parlelport_major = 61; > > > > /* Control variable for memory */ > > /* reservation of the parallel port*/ > > int port; > > > > module_init(parlelport_init); > > module_exit(parlelport_exit); > > > > > > > > > > int parlelport_init(void) { > > > > int result; > > /* Registering device */ > > result = register_chrdev(parlelport_major, "parlelport", > > > > &parlelport_fops); > > > > if (result < 0) { > > > > printk( > > > > "<1>parlelport: cannot obtain major number %d\n", > > parlelport_major); > > > > return result; > > > > } > > <parlelport modified init module> > > printk("<1>Inserting parlelport module\n"); > > return 0; > > > > fail: > > parlelport_exit(); > > return result; > > > > } > > > > > > > > > > > > void parlelport_exit(void) { > > > > /* Make major number free! */ > > unregister_chrdev(parlelport_major, "parlelport"); > > <parlelport modified exit module> > > printk("<1>Removing parlelport module\n"); > > > > } > > > > > > > > > > > > > > int parlelport_open(struct inode *inode, struct file *filp) { > > > > /* Success */ > > return 0; > > > > } > > > > > > > > > > > > int parlelport_release(struct inode *inode, struct file *filp) { > > > > /* Success */ > > return 0; > > > > } > > > > > > > > > > > > ssize_t parlelport_read(struct file *filp, char *buf, > > > > size_t count, loff_t *f_pos) { > > /* Buffer to read the device */ > > char parlelport_buffer; > > <parlelport inport> > > /* We transfer data to user space */ > > copy_to_user(buf,&parlelport_buffer,1); > > /* We change the reading position as best suits */ > > if (*f_pos == 0) { > > > > *f_pos+=1; > > return 1; > > > > } else { > > > > return 0; > > > > } > > > > } > > > > > > > > > > > > > > ssize_t parlelport_write( struct file *filp, char *buf, > > size_t count, loff_t *f_pos) { > > > > char *tmp; > > /* Buffer writing to the device */ > > char parlelport_buffer; > > > > } > > > > > > > > > > > > tmp=buf+count-1; > > copy_from_user(&parlelport_buffer,tmp,1); > > > > <parlelport outport> > > return 1; > > > > } > > > > > > > > -- > > Data Estelar 2455801,305336 > > http://sites.google.com/site/ficmatinf > > Desejo-lhe Paz, Vida Longa e Prosperidade. > > São Bem Vindas Mensagens no Formato texto UTF-8 com Acentos. > > > > -- > > GUS-BR - Grupo de Usuários de Slackware Brasil > > http://www.slackwarebrasil.org/ > > http://groups.google.com/group/slack-users-br > > > > Antes de perguntar: > > http://www.istf.com.br/perguntas/ > > > > Para sair da lista envie um e-mail para: > > [email protected] -- Data Estelar 2455802,425509 http://sites.google.com/site/ficmatinf Desejo-lhe Paz, Vida Longa e Prosperidade. São Bem Vindas Mensagens no Formato texto UTF-8 com Acentos. -- GUS-BR - Grupo de Usuários de Slackware Brasil http://www.slackwarebrasil.org/ http://groups.google.com/group/slack-users-br Antes de perguntar: http://www.istf.com.br/perguntas/ Para sair da lista envie um e-mail para: [email protected]
