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Rev 2959 Rev 2961
Line 45... Line 45...
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unsigned int elf_load(int fd, elf_header_t *header);
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unsigned int elf_load(int fd, elf_header_t *header);
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typedef void (*entry_point_t)(void);
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typedef void (*entry_point_t)(void);
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int elf_load_file(char *file_name, elf_header_t *header)
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static int elf_load_file(char *file_name, elf_header_t *header)
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{
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{
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    int fd;
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    int fd;
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    int rc;
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    int rc;
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    printf("open and read '%s'...\n", file_name);
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    printf("open and read '%s'...\n", file_name);
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    close(fd);
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    close(fd);
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    return rc;
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    return rc;
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}
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}
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void elf_run(elf_header_t *header)
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static void elf_run(elf_header_t *header)
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{
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{
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    entry_point_t entry_point;
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    entry_point_t entry_point;
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    entry_point = (entry_point_t)header->e_entry;
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    entry_point = (entry_point_t)header->e_entry;
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    (*entry_point)();
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    (*entry_point)();
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    /* not reached */
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    /* not reached */
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}
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}
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void elf_create_pcb(elf_header_t *header)
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static int elf_create_pcb(elf_header_t *header)
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{
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{
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    pcb_t *pcb;
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    pcb_t *pcb;
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    void *a;
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    void *a;
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    pcb = (pcb_t *)PCB_ADDRESS;
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    pcb = (pcb_t *)PCB_ADDRESS;
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        printf("elf_create_pcb: memory mapping failed\n");
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        printf("elf_create_pcb: memory mapping failed\n");
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        return EE_MEMORY;
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        return EE_MEMORY;
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    }
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    }
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    pcb->entry = (entry_point_t)header->e_entry;
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    pcb->entry = (entry_point_t)header->e_entry;
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    return 0;
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}
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}
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int main(int argc, char *argv[])
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int main(int argc, char *argv[])
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{
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{
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    elf_header_t prog_header;
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    elf_header_t prog_header;
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        printf("failed to load program\n");
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        printf("failed to load program\n");
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        return 1;
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        return 1;
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    }
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    }
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    printf("Create PCB\n");
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    printf("Create PCB\n");
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    elf_create_pcb(&prog_header);  
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    if (elf_create_pcb(&prog_header) < 0) return 1;
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    printf("Load dynamic linker\n");
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    printf("Load dynamic linker\n");
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    file_name = "/rtld.so";
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    file_name = "/rtld.so";
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    printf("open and read '%s'...\n", file_name);
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    printf("open and read '%s'...\n", file_name);
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    rc = elf_load_file(file_name, &interp_header);
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    rc = elf_load_file(file_name, &interp_header);