11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 1998-2004 Hewlett-Packard Co 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * David Mosberger-Tang <davidm@hpl.hp.com> 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Stephane Eranian <eranian@hpl.hp.com> 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2003 Intel Co 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Suresh Siddha <suresh.b.siddha@intel.com> 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Fenghua Yu <fenghua.yu@intel.com> 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arun Sharma <arun.sharma@intel.com> 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12/07/98 S. Eranian added pt_regs & switch_stack 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12/21/98 D. Mosberger updated to match latest code 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 6/17/99 D. Mosberger added second unat member to "struct switch_stack" 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1543e40f25d2c090392fc36cb900b42972e88cc2e2David Howells#ifndef _ASM_IA64_PTRACE_H 1643e40f25d2c090392fc36cb900b42972e88cc2e2David Howells#define _ASM_IA64_PTRACE_H 17d5759641f5809b19bad4e2af6ca97b830545aabaDavid Woodhouse 1882f1b07b9ad88066c0fa867dd6b32ce43ae7ad22Tony Luck#ifndef ASM_OFFSETS_C 190013a85454c281faaf064ccb576e373a2881aac8Sam Ravnborg#include <asm/asm-offsets.h> 2082f1b07b9ad88066c0fa867dd6b32ce43ae7ad22Tony Luck#endif 2143e40f25d2c090392fc36cb900b42972e88cc2e2David Howells#include <uapi/asm/ptrace.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Base-2 logarithm of number of pages to allocate per task structure 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (including register backing store and memory stack): 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if defined(CONFIG_IA64_PAGE_SIZE_4KB) 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define KERNEL_STACK_SIZE_ORDER 3 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#elif defined(CONFIG_IA64_PAGE_SIZE_8KB) 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define KERNEL_STACK_SIZE_ORDER 2 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#elif defined(CONFIG_IA64_PAGE_SIZE_16KB) 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define KERNEL_STACK_SIZE_ORDER 1 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define KERNEL_STACK_SIZE_ORDER 0 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 374dcc29e1574d88f4465ba865ed82800032f76418Tony Luck#define IA64_RBS_OFFSET ((IA64_TASK_SIZE + IA64_THREAD_INFO_SIZE + 31) & ~31) 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IA64_STK_OFFSET ((1 << KERNEL_STACK_SIZE_ORDER)*PAGE_SIZE) 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_STACK_SIZE IA64_STK_OFFSET 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42d5759641f5809b19bad4e2af6ca97b830545aabaDavid Woodhouse#ifndef __ASSEMBLY__ 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44d5759641f5809b19bad4e2af6ca97b830545aabaDavid Woodhouse#include <asm/current.h> 45d5759641f5809b19bad4e2af6ca97b830545aabaDavid Woodhouse#include <asm/page.h> 46d5759641f5809b19bad4e2af6ca97b830545aabaDavid Woodhouse 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We use the ia64_psr(regs)->ri to determine which of the three 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * instructions in bundle (16 bytes) took the sample. Generate 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the canonical representation by adding to instruction pointer. 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define instruction_pointer(regs) ((regs)->cr_iip + ia64_psr(regs)->ri) 53b3f827cb0fe0660c2eacea2c2f9bdb1f225ff768Ananth N Mavinakayanahalli 54cfb361f13c8136de78c406745abc4e4456e6d480Shaohua Listatic inline unsigned long user_stack_pointer(struct pt_regs *regs) 55cfb361f13c8136de78c406745abc4e4456e6d480Shaohua Li{ 56cfb361f13c8136de78c406745abc4e4456e6d480Shaohua Li /* FIXME: should this be bspstore + nr_dirty regs? */ 57cfb361f13c8136de78c406745abc4e4456e6d480Shaohua Li return regs->ar_bspstore; 58cfb361f13c8136de78c406745abc4e4456e6d480Shaohua Li} 59cfb361f13c8136de78c406745abc4e4456e6d480Shaohua Li 60d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Parisstatic inline int is_syscall_success(struct pt_regs *regs) 61d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris{ 62d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris return regs->r10 != -1; 63d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris} 64d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris 65d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Parisstatic inline long regs_return_value(struct pt_regs *regs) 66d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris{ 67d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris if (is_syscall_success(regs)) 68d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris return regs->r8; 69d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris else 70d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris return -regs->r8; 71d7e7528bcd456f5c36ad4a202ccfb43c5aa98bc4Eric Paris} 72b3f827cb0fe0660c2eacea2c2f9bdb1f225ff768Ananth N Mavinakayanahalli 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Conserve space in histogram by encoding slot bits in address 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bits 2 and 3 rather than bits 0 and 1. 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define profile_pc(regs) \ 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds({ \ 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long __ip = instruction_pointer(regs); \ 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (__ip & ~3UL) + ((__ip & 3UL) << 2); \ 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}) 811ca97bb541a1f5a735e697a8bba763cde3aab452Al Viro/* 821ca97bb541a1f5a735e697a8bba763cde3aab452Al Viro * Why not default? Because user_stack_pointer() on ia64 gives register 831ca97bb541a1f5a735e697a8bba763cde3aab452Al Viro * stack backing store instead... 841ca97bb541a1f5a735e697a8bba763cde3aab452Al Viro */ 851ca97bb541a1f5a735e697a8bba763cde3aab452Al Viro#define current_user_stack_pointer() (current_pt_regs()->r12) 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* given a pointer to a task_struct, return the user's pt_regs */ 886450578f32cdca587ae5f148e2118b2fcc36bb11Al Viro# define task_pt_regs(t) (((struct pt_regs *) ((char *) (t) + IA64_STK_OFFSET)) - 1) 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define ia64_psr(regs) ((struct ia64_psr *) &(regs)->cr_ipsr) 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define user_mode(regs) (((struct ia64_psr *) &(regs)->cr_ipsr)->cpl != 0) 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define user_stack(task,regs) ((long) regs - (long) task == IA64_STK_OFFSET - sizeof(*regs)) 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define fsys_mode(task,regs) \ 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ({ \ 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct task_struct *_task = (task); \ 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pt_regs *_regs = (regs); \ 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds !user_mode(_regs) && user_stack(_task, _regs); \ 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }) 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * System call handlers that, upon successful completion, need to return a negative value 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * should call force_successful_syscall_return() right before returning. On architectures 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * where the syscall convention provides for a separate error flag (e.g., alpha, ia64, 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ppc{,64}, sparc{,64}, possibly others), this macro can be used to ensure that the error 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * flag will not get set. On architectures which do not support a separate error flag, 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the macro is a no-op and the spurious error condition needs to be filtered out by some 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * other means (e.g., in user-level, by passing an extra argument to the syscall handler, 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or something along those lines). 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * On ia64, we can clear the user's pt_regs->r8 to force a successful syscall. 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1116450578f32cdca587ae5f148e2118b2fcc36bb11Al Viro# define force_successful_syscall_return() (task_pt_regs(current)->r8 = 0) 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct task_struct; /* forward decl */ 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct unw_frame_info; /* forward decl */ 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern void ia64_do_show_stack (struct unw_frame_info *, void *); 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern unsigned long ia64_get_user_rbs_end (struct task_struct *, struct pt_regs *, 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long *); 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern long ia64_peek (struct task_struct *, struct switch_stack *, unsigned long, 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long, long *); 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern long ia64_poke (struct task_struct *, struct switch_stack *, unsigned long, 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long, long); 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern void ia64_flush_fph (struct task_struct *); 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern void ia64_sync_fph (struct task_struct *); 1253b2ce0b17824c42bc2e46f7dd903b4acf5e9fff9Petr Tesarik extern void ia64_sync_krbs(void); 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern long ia64_sync_user_rbs (struct task_struct *, struct switch_stack *, 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long, unsigned long); 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* get nat bits for scratch registers such that bit N==1 iff scratch register rN is a NaT */ 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern unsigned long ia64_get_scratch_nat_bits (struct pt_regs *pt, unsigned long scratch_unat); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* put nat bits for scratch registers such that scratch register rN is a NaT iff bit N==1 */ 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern unsigned long ia64_put_scratch_nat_bits (struct pt_regs *pt, unsigned long nat); 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern void ia64_increment_ip (struct pt_regs *pt); 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extern void ia64_decrement_ip (struct pt_regs *pt); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1373b2ce0b17824c42bc2e46f7dd903b4acf5e9fff9Petr Tesarik extern void ia64_ptrace_stop(void); 1383b2ce0b17824c42bc2e46f7dd903b4acf5e9fff9Petr Tesarik #define arch_ptrace_stop(code, info) \ 1393b2ce0b17824c42bc2e46f7dd903b4acf5e9fff9Petr Tesarik ia64_ptrace_stop() 1403b2ce0b17824c42bc2e46f7dd903b4acf5e9fff9Petr Tesarik #define arch_ptrace_stop_needed(code, info) \ 1413b2ce0b17824c42bc2e46f7dd903b4acf5e9fff9Petr Tesarik (!test_thread_flag(TIF_RESTORE_RSE)) 1423b2ce0b17824c42bc2e46f7dd903b4acf5e9fff9Petr Tesarik 143aa91a2e90044b88228bdb0620e771f2ea7798804Petr Tesarik extern void ptrace_attach_sync_user_rbs (struct task_struct *); 144aa91a2e90044b88228bdb0620e771f2ea7798804Petr Tesarik #define arch_ptrace_attach(child) \ 145aa91a2e90044b88228bdb0620e771f2ea7798804Petr Tesarik ptrace_attach_sync_user_rbs(child) 146aa91a2e90044b88228bdb0620e771f2ea7798804Petr Tesarik 1478db3f5254151c3a06a764bbb18283570ba1897bfPetr Tesarik #define arch_has_single_step() (1) 1488db3f5254151c3a06a764bbb18283570ba1897bfPetr Tesarik #define arch_has_block_step() (1) 1498db3f5254151c3a06a764bbb18283570ba1897bfPetr Tesarik 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* !__ASSEMBLY__ */ 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* _ASM_IA64_PTRACE_H */ 152