74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
#include <spslr.h>
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#include "task_struct.h"
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int second_pid();
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const char* second_comm();
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int subsecond_pid();
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const char* subsecond_comm();
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struct task_struct global = { .pid = 42, .comm = "main_global", .arrfun = {
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{ .a = 1, .b = 2, .c = 3, .d = 4.0 },
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{ .a = 5, .b = 6, .c = 7, .d = 8.0 },
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{ .a = 9, .b = 10, .c = 11, .d = 12.0 },
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{ .a = 13, .b = 14, .c = 15, .d = 16.0 },
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{ .a = 17, .b = 18, .c = 19, .d = 20.0 }
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} };
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static void print_layout() {
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// TODO -> Make builtin __spslr_initial_offsetof(type, field) that is not patched
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printf("Current task_struct layout:\n");
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printf(" stuck0 (int) : %2llu -> %2llu\n", 0, offsetof(struct task_struct, stuck0));
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printf(" pid (int) : %2llu -> %2llu\n", 8, offsetof(struct task_struct, pid));
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printf(" comm (const char*) : %2llu -> %2llu\n", 16, offsetof(struct task_struct, comm));
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printf(" arrfun (struct ArrayFun [5]) : %2llu -> %2llu\n", 24, offsetof(struct task_struct, arrfun));
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printf(" tasks (struct list_head) : %2llu -> %2llu\n", 144, offsetof(struct task_struct, tasks));
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printf(" stuck1 (int) : %2llu -> %2llu\n", 160, offsetof(struct task_struct, stuck1));
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printf(" stuck2 (int) : %2llu -> %2llu\n", 166, offsetof(struct task_struct, stuck2));
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}
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void arr_test() {
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printf("Global arrfun[3].b: %d (should be 14)\n", global.arrfun[3].b);
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}
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int main(void)
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{
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spslr_selfpatch();
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print_layout();
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struct list_head task_list;
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INIT_LIST_HEAD(&task_list);
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struct task_struct t1 = { .pid = 1, .comm = "init" };
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struct task_struct t2 = { .pid = 2, .comm = "kthreadd" };
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struct task_struct t3 = { .pid = 3, .comm = "worker" };
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INIT_LIST_HEAD(&t1.tasks);
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INIT_LIST_HEAD(&t2.tasks);
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INIT_LIST_HEAD(&t3.tasks);
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list_add_tail(&t1.tasks, &task_list);
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list_add_tail(&t2.tasks, &task_list);
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list_add_tail(&t3.tasks, &task_list);
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printf("Task list:\n");
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struct list_head *pos;
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list_for_each(pos, &task_list) {
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struct task_struct *task = list_entry(pos, struct task_struct, tasks);
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printf(" pid=%d, comm=%s\n", task->pid, task->comm);
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}
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size_t myOffset = ((size_t)&((struct task_struct*)0)->tasks);
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printf("DIY offsetof(task_struct, tasks) yiels %2llu\n", myOffset);
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printf("Global: pid=%d comm=\"%s\"\n", global.pid, global.comm);
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printf("Second global: pid=%d comm=\"%s\"\n", second_pid(), second_comm());
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printf("Subsecond global: pid=%d comm=\"%s\"\n", subsecond_pid(), subsecond_comm());
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arr_test();
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return 0;
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}
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