asm-offsets.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Generate definitions needed by assembly language modules.
  4 * This code generates raw asm output which is post-processed to extract
  5 * and format the required data.
  6 */
  7#define COMPILE_OFFSETS
  8
  9#include <linux/kbuild.h>
 10#include <linux/sched.h>
 11#include <linux/purgatory.h>
 12#include <linux/pgtable.h>
 13#include <linux/ftrace_regs.h>
 14#include <asm/kvm_host_types.h>
 15#include <asm/stacktrace.h>
 16#include <asm/ptrace.h>
 17
 18int main(void)
 19{
 20	/* task struct offsets */
 21	OFFSET(__TASK_stack, task_struct, stack);
 22	OFFSET(__TASK_thread, task_struct, thread);
 23	OFFSET(__TASK_pid, task_struct, pid);
 24#ifdef CONFIG_STACKPROTECTOR
 25	OFFSET(__TASK_stack_canary, task_struct, stack_canary);
 26#endif
 27	BLANK();
 28	/* thread struct offsets */
 29	OFFSET(__THREAD_ksp, thread_struct, ksp);
 30	BLANK();
 31	/* thread info offsets */
 32	OFFSET(__TI_flags, task_struct, thread_info.flags);
 33	OFFSET(__TI_sie, task_struct, thread_info.sie);
 34	BLANK();
 35	/* pt_regs offsets */
 36	OFFSET(__PT_PSW, pt_regs, psw);
 37	OFFSET(__PT_GPRS, pt_regs, gprs);
 38	OFFSET(__PT_R0, pt_regs, gprs[0]);
 39	OFFSET(__PT_R1, pt_regs, gprs[1]);
 40	OFFSET(__PT_R2, pt_regs, gprs[2]);
 41	OFFSET(__PT_R3, pt_regs, gprs[3]);
 42	OFFSET(__PT_R4, pt_regs, gprs[4]);
 43	OFFSET(__PT_R5, pt_regs, gprs[5]);
 44	OFFSET(__PT_R6, pt_regs, gprs[6]);
 45	OFFSET(__PT_R7, pt_regs, gprs[7]);
 46	OFFSET(__PT_R8, pt_regs, gprs[8]);
 47	OFFSET(__PT_R9, pt_regs, gprs[9]);
 48	OFFSET(__PT_R10, pt_regs, gprs[10]);
 49	OFFSET(__PT_R11, pt_regs, gprs[11]);
 50	OFFSET(__PT_R12, pt_regs, gprs[12]);
 51	OFFSET(__PT_R13, pt_regs, gprs[13]);
 52	OFFSET(__PT_R14, pt_regs, gprs[14]);
 53	OFFSET(__PT_R15, pt_regs, gprs[15]);
 54	OFFSET(__PT_ORIG_GPR2, pt_regs, orig_gpr2);
 55	OFFSET(__PT_INT_CODE, pt_regs, int_code);
 56	OFFSET(__PT_FLAGS, pt_regs, flags);
 57	OFFSET(__PT_LAST_BREAK, pt_regs, last_break);
 58	DEFINE(__PT_SIZE, sizeof(struct pt_regs));
 59	BLANK();
 60	/* stack_frame offsets */
 61	OFFSET(__SF_BACKCHAIN, stack_frame, back_chain);
 62	OFFSET(__SF_GPRS, stack_frame, gprs);
 63	OFFSET(__SF_EMPTY, stack_frame, empty[0]);
 64	OFFSET(__SF_SIE_CONTROL, stack_frame, sie_control_block);
 65	OFFSET(__SF_SIE_SAVEAREA, stack_frame, sie_savearea);
 66	OFFSET(__SF_SIE_REASON, stack_frame, sie_reason);
 67	OFFSET(__SF_SIE_FLAGS, stack_frame, sie_flags);
 68	OFFSET(__SF_SIE_CONTROL_PHYS, stack_frame, sie_control_block_phys);
 69	OFFSET(__SF_SIE_GUEST_ASCE, stack_frame, sie_guest_asce);
 70	OFFSET(__SF_SIE_IRQ, stack_frame, sie_irq);
 71	DEFINE(STACK_FRAME_OVERHEAD, sizeof(struct stack_frame));
 72	BLANK();
 73	OFFSET(__SFUSER_BACKCHAIN, stack_frame_user, back_chain);
 74	DEFINE(STACK_FRAME_USER_OVERHEAD, sizeof(struct stack_frame_user));
 75	OFFSET(__SFVDSO_RETURN_ADDRESS, stack_frame_vdso_wrapper, return_address);
 76	DEFINE(STACK_FRAME_VDSO_OVERHEAD, sizeof(struct stack_frame_vdso_wrapper));
 77	BLANK();
 78	/* hardware defined lowcore locations 0x000 - 0x1ff */
 79	OFFSET(__LC_EXT_PARAMS, lowcore, ext_params);
 80	OFFSET(__LC_EXT_CPU_ADDR, lowcore, ext_cpu_addr);
 81	OFFSET(__LC_EXT_INT_CODE, lowcore, ext_int_code);
 82	OFFSET(__LC_PGM_ILC, lowcore, pgm_ilc);
 83	OFFSET(__LC_PGM_CODE, lowcore, pgm_code);
 84	OFFSET(__LC_PGM_INT_CODE, lowcore, pgm_int_code);
 85	OFFSET(__LC_DATA_EXC_CODE, lowcore, data_exc_code);
 86	OFFSET(__LC_MON_CLASS_NR, lowcore, mon_class_num);
 87	OFFSET(__LC_PER_CODE, lowcore, per_code);
 88	OFFSET(__LC_PER_ATMID, lowcore, per_atmid);
 89	OFFSET(__LC_PER_ADDRESS, lowcore, per_address);
 90	OFFSET(__LC_EXC_ACCESS_ID, lowcore, exc_access_id);
 91	OFFSET(__LC_PER_ACCESS_ID, lowcore, per_access_id);
 92	OFFSET(__LC_OP_ACCESS_ID, lowcore, op_access_id);
 93	OFFSET(__LC_AR_MODE_ID, lowcore, ar_mode_id);
 94	OFFSET(__LC_TRANS_EXC_CODE, lowcore, trans_exc_code);
 95	OFFSET(__LC_MON_CODE, lowcore, monitor_code);
 96	OFFSET(__LC_SUBCHANNEL_ID, lowcore, subchannel_id);
 97	OFFSET(__LC_SUBCHANNEL_NR, lowcore, subchannel_nr);
 98	OFFSET(__LC_IO_INT_PARM, lowcore, io_int_parm);
 99	OFFSET(__LC_IO_INT_WORD, lowcore, io_int_word);
100	OFFSET(__LC_MCCK_CODE, lowcore, mcck_interruption_code);
101	OFFSET(__LC_EXT_DAMAGE_CODE, lowcore, external_damage_code);
102	OFFSET(__LC_MCCK_FAIL_STOR_ADDR, lowcore, failing_storage_address);
103	OFFSET(__LC_PGM_LAST_BREAK, lowcore, pgm_last_break);
104	OFFSET(__LC_RETURN_LPSWE, lowcore, return_lpswe);
105	OFFSET(__LC_RETURN_MCCK_LPSWE, lowcore, return_mcck_lpswe);
106	OFFSET(__LC_RST_OLD_PSW, lowcore, restart_old_psw);
107	OFFSET(__LC_EXT_OLD_PSW, lowcore, external_old_psw);
108	OFFSET(__LC_SVC_OLD_PSW, lowcore, svc_old_psw);
109	OFFSET(__LC_PGM_OLD_PSW, lowcore, program_old_psw);
110	OFFSET(__LC_MCK_OLD_PSW, lowcore, mcck_old_psw);
111	OFFSET(__LC_IO_OLD_PSW, lowcore, io_old_psw);
112	OFFSET(__LC_RST_NEW_PSW, lowcore, restart_psw);
113	OFFSET(__LC_EXT_NEW_PSW, lowcore, external_new_psw);
114	OFFSET(__LC_SVC_NEW_PSW, lowcore, svc_new_psw);
115	OFFSET(__LC_PGM_NEW_PSW, lowcore, program_new_psw);
116	OFFSET(__LC_MCK_NEW_PSW, lowcore, mcck_new_psw);
117	OFFSET(__LC_IO_NEW_PSW, lowcore, io_new_psw);
118	/* software defined lowcore locations 0x200 - 0xdff*/
119	OFFSET(__LC_SAVE_AREA, lowcore, save_area);
120	OFFSET(__LC_SAVE_AREA_RESTART, lowcore, save_area_restart);
121	OFFSET(__LC_PCPU, lowcore, pcpu);
122	OFFSET(__LC_RETURN_PSW, lowcore, return_psw);
123	OFFSET(__LC_RETURN_MCCK_PSW, lowcore, return_mcck_psw);
124	OFFSET(__LC_SYS_ENTER_TIMER, lowcore, sys_enter_timer);
125	OFFSET(__LC_MCCK_ENTER_TIMER, lowcore, mcck_enter_timer);
126	OFFSET(__LC_EXIT_TIMER, lowcore, exit_timer);
127	OFFSET(__LC_LAST_UPDATE_TIMER, lowcore, last_update_timer);
128	OFFSET(__LC_LAST_UPDATE_CLOCK, lowcore, last_update_clock);
129	OFFSET(__LC_INT_CLOCK, lowcore, int_clock);
130	OFFSET(__LC_CURRENT, lowcore, current_task);
131	OFFSET(__LC_KERNEL_STACK, lowcore, kernel_stack);
132	OFFSET(__LC_ASYNC_STACK, lowcore, async_stack);
133	OFFSET(__LC_NODAT_STACK, lowcore, nodat_stack);
134	OFFSET(__LC_RESTART_STACK, lowcore, restart_stack);
135	OFFSET(__LC_MCCK_STACK, lowcore, mcck_stack);
136	OFFSET(__LC_RESTART_FN, lowcore, restart_fn);
137	OFFSET(__LC_RESTART_DATA, lowcore, restart_data);
138	OFFSET(__LC_RESTART_SOURCE, lowcore, restart_source);
139	OFFSET(__LC_RESTART_FLAGS, lowcore, restart_flags);
140	OFFSET(__LC_KERNEL_ASCE, lowcore, kernel_asce);
141	OFFSET(__LC_USER_ASCE, lowcore, user_asce);
142	OFFSET(__LC_LPP, lowcore, lpp);
143	OFFSET(__LC_CURRENT_PID, lowcore, current_pid);
144	OFFSET(__LC_LAST_BREAK, lowcore, last_break);
145	/* software defined ABI-relevant lowcore locations 0xe00 - 0xe20 */
146	OFFSET(__LC_STACK_CANARY, lowcore, stack_canary);
147	OFFSET(__LC_DUMP_REIPL, lowcore, ipib);
148	OFFSET(__LC_VMCORE_INFO, lowcore, vmcore_info);
149	OFFSET(__LC_OS_INFO, lowcore, os_info);
150	/* hardware defined lowcore locations 0x1000 - 0x18ff */
151	OFFSET(__LC_MCESAD, lowcore, mcesad);
152	OFFSET(__LC_EXT_PARAMS2, lowcore, ext_params2);
153	OFFSET(__LC_FPREGS_SAVE_AREA, lowcore, floating_pt_save_area);
154	OFFSET(__LC_GPREGS_SAVE_AREA, lowcore, gpregs_save_area);
155	OFFSET(__LC_PSW_SAVE_AREA, lowcore, psw_save_area);
156	OFFSET(__LC_PREFIX_SAVE_AREA, lowcore, prefixreg_save_area);
157	OFFSET(__LC_FP_CREG_SAVE_AREA, lowcore, fpt_creg_save_area);
158	OFFSET(__LC_TOD_PROGREG_SAVE_AREA, lowcore, tod_progreg_save_area);
159	OFFSET(__LC_CPU_TIMER_SAVE_AREA, lowcore, cpu_timer_save_area);
160	OFFSET(__LC_CLOCK_COMP_SAVE_AREA, lowcore, clock_comp_save_area);
161	OFFSET(__LC_LAST_BREAK_SAVE_AREA, lowcore, last_break_save_area);
162	OFFSET(__LC_AREGS_SAVE_AREA, lowcore, access_regs_save_area);
163	OFFSET(__LC_CREGS_SAVE_AREA, lowcore, cregs_save_area);
164	OFFSET(__LC_PGM_TDB, lowcore, pgm_tdb);
165	BLANK();
166	/* gmap/sie offsets */
167	OFFSET(__SIE_PROG0C, kvm_s390_sie_block, prog0c);
168	OFFSET(__SIE_PROG20, kvm_s390_sie_block, prog20);
169	/* kexec_sha_region */
170	OFFSET(__KEXEC_SHA_REGION_START, kexec_sha_region, start);
171	OFFSET(__KEXEC_SHA_REGION_LEN, kexec_sha_region, len);
172	DEFINE(__KEXEC_SHA_REGION_SIZE, sizeof(struct kexec_sha_region));
173	/* sizeof kernel parameter area */
174	DEFINE(__PARMAREA_SIZE, sizeof(struct parmarea));
175	/* kernel parameter area offsets */
176	DEFINE(IPL_DEVICE, PARMAREA + offsetof(struct parmarea, ipl_device));
177	DEFINE(INITRD_START, PARMAREA + offsetof(struct parmarea, initrd_start));
178	DEFINE(INITRD_SIZE, PARMAREA + offsetof(struct parmarea, initrd_size));
179	DEFINE(OLDMEM_BASE, PARMAREA + offsetof(struct parmarea, oldmem_base));
180	DEFINE(OLDMEM_SIZE, PARMAREA + offsetof(struct parmarea, oldmem_size));
181	DEFINE(COMMAND_LINE, PARMAREA + offsetof(struct parmarea, command_line));
182	DEFINE(MAX_COMMAND_LINE_SIZE, PARMAREA + offsetof(struct parmarea, max_command_line_size));
183	OFFSET(__FTRACE_REGS_PT_REGS, __arch_ftrace_regs, regs);
184	DEFINE(__FTRACE_REGS_SIZE, sizeof(struct __arch_ftrace_regs));
185
186	OFFSET(__PCPU_FLAGS, pcpu, flags);
187	return 0;
188}