021585e9ef
- Free process resources when a process exits (reaped in next process cycle; should probably reap after a wait() or something) - Free process struct after wait() - Fix page allocation - Fix fork() return value for child process (attempted to write to an invalid point in kernel-stack memory) We shouldn't be triple faulting randomly anymore! Continue investigating the fork() return value, as there was a bugged return at some point during executon of a test run of thrash-process.
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*/
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#ifndef PROCESS_H
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#define PROCESS_H
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#include <system.h>
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#include <tree.h>
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#include <signal.h>
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#define KERNEL_STACK_SIZE 0x2000
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typedef signed int pid_t;
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typedef unsigned int user_t;
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typedef unsigned int group_t;
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typedef unsigned char status_t;
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/* Unix waitpid() options */
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enum wait_option{
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WCONTINUED,
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WNOHANG,
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WUNTRACED
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};
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/* x86 task */
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typedef struct thread {
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uintptr_t esp; /* Stack Pointer */
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uintptr_t ebp; /* Base Pointer */
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uintptr_t eip; /* Instruction Pointer */
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page_directory_t * page_directory; /* Page Directory */
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} thread_t;
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/* Portable image struct */
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typedef struct image {
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size_t size; /* Image size */
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uintptr_t entry; /* Binary entry point */
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uintptr_t heap; /* Heap pointer */
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uintptr_t heap_actual; /* Actual heap location */
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uintptr_t stack; /* Process kernel stack */
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uintptr_t user_stack; /* User stack */
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} image_t;
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/* Resizable descriptor table */
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typedef struct descriptor_table {
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fs_node_t ** entries;
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size_t length;
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size_t capacity;
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} fd_table_t;
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/* XXX */
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#define SIG_COUNT 10
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/* Signal Table */
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typedef struct signal_table {
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uintptr_t * functions[NUMSIGNALS];
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} sig_table_t;
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/* Portable process struct */
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typedef struct process {
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pid_t id; /* Process ID (pid) */
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char * name; /* Process Name */
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char * description; /* Process description */
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user_t user; /* Effective user */
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group_t group; /* Process scheduling group */
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thread_t thread; /* Associated task information */
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tree_node_t * tree_entry; /* Process Tree Entry */
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image_t image; /* Binary image information */
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fs_node_t * wd_node; /* Working directory VFS node */
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char * wd_name; /* Working directory path name */
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fd_table_t fds; /* File descriptor table */
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status_t status; /* Process status */
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sig_table_t signals; /* Signal table */
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uint8_t finished; /* Status indicator */
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} process_t;
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void initialize_process_tree();
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process_t * spawn_process(volatile process_t * parent);
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void debug_print_process_tree();
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process_t * spawn_init();
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void set_process_environment(process_t * proc, page_directory_t * directory);
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void make_process_ready(process_t * proc);
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void make_process_reapable(process_t * proc);
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uint8_t process_available();
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process_t * next_ready_process();
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uint8_t should_reap();
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process_t * next_reapable_process();
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uint32_t process_append_fd(process_t * proc, fs_node_t * node);
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process_t * process_from_pid(pid_t pid);
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void delete_process(process_t * proc);
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volatile process_t * current_process;
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#endif
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