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-rw-r--r--arch/s390/kernel/ptrace.c524
1 files changed, 0 insertions, 524 deletions
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 494216c4b4f3..ceaa1726e328 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -22,7 +22,6 @@
#include <linux/elf.h>
#include <linux/regset.h>
#include <linux/seccomp.h>
-#include <linux/compat.h>
#include <trace/syscall.h>
#include <asm/guarded_storage.h>
#include <asm/access-regs.h>
@@ -38,10 +37,6 @@
#include "entry.h"
-#ifdef CONFIG_COMPAT
-#include "compat_ptrace.h"
-#endif
-
void update_cr_regs(struct task_struct *task)
{
struct pt_regs *regs = task_pt_regs(task);
@@ -507,308 +502,6 @@ long arch_ptrace(struct task_struct *child, long request,
}
}
-#ifdef CONFIG_COMPAT
-/*
- * Now the fun part starts... a 31 bit program running in the
- * 31 bit emulation tracing another program. PTRACE_PEEKTEXT,
- * PTRACE_PEEKDATA, PTRACE_POKETEXT and PTRACE_POKEDATA are easy
- * to handle, the difference to the 64 bit versions of the requests
- * is that the access is done in multiples of 4 byte instead of
- * 8 bytes (sizeof(unsigned long) on 31/64 bit).
- * The ugly part are PTRACE_PEEKUSR, PTRACE_PEEKUSR_AREA,
- * PTRACE_POKEUSR and PTRACE_POKEUSR_AREA. If the traced program
- * is a 31 bit program too, the content of struct user can be
- * emulated. A 31 bit program peeking into the struct user of
- * a 64 bit program is a no-no.
- */
-
-/*
- * Same as peek_user_per but for a 31 bit program.
- */
-static inline __u32 __peek_user_per_compat(struct task_struct *child,
- addr_t addr)
-{
- if (addr == offsetof(struct compat_per_struct_kernel, cr9))
- /* Control bits of the active per set. */
- return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
- PER_EVENT_IFETCH : child->thread.per_user.control;
- else if (addr == offsetof(struct compat_per_struct_kernel, cr10))
- /* Start address of the active per set. */
- return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
- 0 : child->thread.per_user.start;
- else if (addr == offsetof(struct compat_per_struct_kernel, cr11))
- /* End address of the active per set. */
- return test_thread_flag(TIF_SINGLE_STEP) ?
- PSW32_ADDR_INSN : child->thread.per_user.end;
- else if (addr == offsetof(struct compat_per_struct_kernel, bits))
- /* Single-step bit. */
- return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
- 0x80000000 : 0;
- else if (addr == offsetof(struct compat_per_struct_kernel, starting_addr))
- /* Start address of the user specified per set. */
- return (__u32) child->thread.per_user.start;
- else if (addr == offsetof(struct compat_per_struct_kernel, ending_addr))
- /* End address of the user specified per set. */
- return (__u32) child->thread.per_user.end;
- else if (addr == offsetof(struct compat_per_struct_kernel, perc_atmid))
- /* PER code, ATMID and AI of the last PER trap */
- return (__u32) child->thread.per_event.cause << 16;
- else if (addr == offsetof(struct compat_per_struct_kernel, address))
- /* Address of the last PER trap */
- return (__u32) child->thread.per_event.address;
- else if (addr == offsetof(struct compat_per_struct_kernel, access_id))
- /* Access id of the last PER trap */
- return (__u32) child->thread.per_event.paid << 24;
- return 0;
-}
-
-/*
- * Same as peek_user but for a 31 bit program.
- */
-static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
-{
- addr_t offset;
- __u32 tmp;
-
- if (addr < offsetof(struct compat_user, regs.acrs)) {
- struct pt_regs *regs = task_pt_regs(child);
- /*
- * psw and gprs are stored on the stack
- */
- if (addr == offsetof(struct compat_user, regs.psw.mask)) {
- /* Fake a 31 bit psw mask. */
- tmp = (__u32)(regs->psw.mask >> 32);
- tmp &= PSW32_MASK_USER | PSW32_MASK_RI;
- tmp |= PSW32_USER_BITS;
- } else if (addr == offsetof(struct compat_user, regs.psw.addr)) {
- /* Fake a 31 bit psw address. */
- tmp = (__u32) regs->psw.addr |
- (__u32)(regs->psw.mask & PSW_MASK_BA);
- } else {
- /* gpr 0-15 */
- tmp = *(__u32 *)((addr_t) &regs->psw + addr*2 + 4);
- }
- } else if (addr < offsetof(struct compat_user, regs.orig_gpr2)) {
- /*
- * access registers are stored in the thread structure
- */
- offset = addr - offsetof(struct compat_user, regs.acrs);
- tmp = *(__u32*)((addr_t) &child->thread.acrs + offset);
-
- } else if (addr == offsetof(struct compat_user, regs.orig_gpr2)) {
- /*
- * orig_gpr2 is stored on the kernel stack
- */
- tmp = *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4);
-
- } else if (addr < offsetof(struct compat_user, regs.fp_regs)) {
- /*
- * prevent reads of padding hole between
- * orig_gpr2 and fp_regs on s390.
- */
- tmp = 0;
-
- } else if (addr == offsetof(struct compat_user, regs.fp_regs.fpc)) {
- /*
- * floating point control reg. is in the thread structure
- */
- tmp = child->thread.ufpu.fpc;
-
- } else if (addr < offsetof(struct compat_user, regs.fp_regs) + sizeof(s390_fp_regs)) {
- /*
- * floating point regs. are in the child->thread.ufpu.vxrs array
- */
- offset = addr - offsetof(struct compat_user, regs.fp_regs.fprs);
- tmp = *(__u32 *)((addr_t)child->thread.ufpu.vxrs + 2 * offset);
- } else if (addr < offsetof(struct compat_user, regs.per_info) + sizeof(struct compat_per_struct_kernel)) {
- /*
- * Handle access to the per_info structure.
- */
- addr -= offsetof(struct compat_user, regs.per_info);
- tmp = __peek_user_per_compat(child, addr);
-
- } else
- tmp = 0;
-
- return tmp;
-}
-
-static int peek_user_compat(struct task_struct *child,
- addr_t addr, addr_t data)
-{
- __u32 tmp;
-
- if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user) - 3)
- return -EIO;
-
- tmp = __peek_user_compat(child, addr);
- return put_user(tmp, (__u32 __user *) data);
-}
-
-/*
- * Same as poke_user_per but for a 31 bit program.
- */
-static inline void __poke_user_per_compat(struct task_struct *child,
- addr_t addr, __u32 data)
-{
- if (addr == offsetof(struct compat_per_struct_kernel, cr9))
- /* PER event mask of the user specified per set. */
- child->thread.per_user.control =
- data & (PER_EVENT_MASK | PER_CONTROL_MASK);
- else if (addr == offsetof(struct compat_per_struct_kernel, starting_addr))
- /* Starting address of the user specified per set. */
- child->thread.per_user.start = data;
- else if (addr == offsetof(struct compat_per_struct_kernel, ending_addr))
- /* Ending address of the user specified per set. */
- child->thread.per_user.end = data;
-}
-
-/*
- * Same as poke_user but for a 31 bit program.
- */
-static int __poke_user_compat(struct task_struct *child,
- addr_t addr, addr_t data)
-{
- __u32 tmp = (__u32) data;
- addr_t offset;
-
- if (addr < offsetof(struct compat_user, regs.acrs)) {
- struct pt_regs *regs = task_pt_regs(child);
- /*
- * psw, gprs, acrs and orig_gpr2 are stored on the stack
- */
- if (addr == offsetof(struct compat_user, regs.psw.mask)) {
- __u32 mask = PSW32_MASK_USER;
-
- mask |= is_ri_task(child) ? PSW32_MASK_RI : 0;
- /* Build a 64 bit psw mask from 31 bit mask. */
- if ((tmp ^ PSW32_USER_BITS) & ~mask)
- /* Invalid psw mask. */
- return -EINVAL;
- if ((data & PSW32_MASK_ASC) == PSW32_ASC_HOME)
- /* Invalid address-space-control bits */
- return -EINVAL;
- regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) |
- (regs->psw.mask & PSW_MASK_BA) |
- (__u64)(tmp & mask) << 32;
- } else if (addr == offsetof(struct compat_user, regs.psw.addr)) {
- /* Build a 64 bit psw address from 31 bit address. */
- regs->psw.addr = (__u64) tmp & PSW32_ADDR_INSN;
- /* Transfer 31 bit amode bit to psw mask. */
- regs->psw.mask = (regs->psw.mask & ~PSW_MASK_BA) |
- (__u64)(tmp & PSW32_ADDR_AMODE);
- } else {
- if (test_pt_regs_flag(regs, PIF_SYSCALL) &&
- addr == offsetof(struct compat_user, regs.gprs[2])) {
- struct pt_regs *regs = task_pt_regs(child);
-
- regs->int_code = 0x20000 | (data & 0xffff);
- }
- /* gpr 0-15 */
- *(__u32*)((addr_t) &regs->psw + addr*2 + 4) = tmp;
- }
- } else if (addr < offsetof(struct compat_user, regs.orig_gpr2)) {
- /*
- * access registers are stored in the thread structure
- */
- offset = addr - offsetof(struct compat_user, regs.acrs);
- *(__u32*)((addr_t) &child->thread.acrs + offset) = tmp;
-
- } else if (addr == offsetof(struct compat_user, regs.orig_gpr2)) {
- /*
- * orig_gpr2 is stored on the kernel stack
- */
- *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4) = tmp;
-
- } else if (addr < offsetof(struct compat_user, regs.fp_regs)) {
- /*
- * prevent writess of padding hole between
- * orig_gpr2 and fp_regs on s390.
- */
- return 0;
-
- } else if (addr == offsetof(struct compat_user, regs.fp_regs.fpc)) {
- /*
- * floating point control reg. is in the thread structure
- */
- child->thread.ufpu.fpc = data;
-
- } else if (addr < offsetof(struct compat_user, regs.fp_regs) + sizeof(s390_fp_regs)) {
- /*
- * floating point regs. are in the child->thread.ufpu.vxrs array
- */
- offset = addr - offsetof(struct compat_user, regs.fp_regs.fprs);
- *(__u32 *)((addr_t)child->thread.ufpu.vxrs + 2 * offset) = tmp;
- } else if (addr < offsetof(struct compat_user, regs.per_info) + sizeof(struct compat_per_struct_kernel)) {
- /*
- * Handle access to the per_info structure.
- */
- addr -= offsetof(struct compat_user, regs.per_info);
- __poke_user_per_compat(child, addr, data);
- }
-
- return 0;
-}
-
-static int poke_user_compat(struct task_struct *child,
- addr_t addr, addr_t data)
-{
- if (!is_compat_task() || (addr & 3) ||
- addr > sizeof(struct compat_user) - 3)
- return -EIO;
-
- return __poke_user_compat(child, addr, data);
-}
-
-long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
- compat_ulong_t caddr, compat_ulong_t cdata)
-{
- unsigned long addr = caddr;
- unsigned long data = cdata;
- compat_ptrace_area parea;
- int copied, ret;
-
- switch (request) {
- case PTRACE_PEEKUSR:
- /* read the word at location addr in the USER area. */
- return peek_user_compat(child, addr, data);
-
- case PTRACE_POKEUSR:
- /* write the word at location addr in the USER area */
- return poke_user_compat(child, addr, data);
-
- case PTRACE_PEEKUSR_AREA:
- case PTRACE_POKEUSR_AREA:
- if (copy_from_user(&parea, (void __force __user *) addr,
- sizeof(parea)))
- return -EFAULT;
- addr = parea.kernel_addr;
- data = parea.process_addr;
- copied = 0;
- while (copied < parea.len) {
- if (request == PTRACE_PEEKUSR_AREA)
- ret = peek_user_compat(child, addr, data);
- else {
- __u32 utmp;
- if (get_user(utmp,
- (__u32 __force __user *) data))
- return -EFAULT;
- ret = poke_user_compat(child, addr, utmp);
- }
- if (ret)
- return ret;
- addr += sizeof(unsigned int);
- data += sizeof(unsigned int);
- copied += sizeof(unsigned int);
- }
- return 0;
- case PTRACE_GET_LAST_BREAK:
- return put_user(child->thread.last_break, (unsigned int __user *)data);
- }
- return compat_ptrace_request(child, request, addr, data);
-}
-#endif
-
/*
* user_regset definitions.
*/
@@ -1297,225 +990,8 @@ static const struct user_regset_view user_s390_view = {
.n = ARRAY_SIZE(s390_regsets)
};
-#ifdef CONFIG_COMPAT
-static int s390_compat_regs_get(struct task_struct *target,
- const struct user_regset *regset,
- struct membuf to)
-{
- unsigned n;
-
- if (target == current)
- save_access_regs(target->thread.acrs);
-
- for (n = 0; n < sizeof(s390_compat_regs); n += sizeof(compat_ulong_t))
- membuf_store(&to, __peek_user_compat(target, n));
- return 0;
-}
-
-static int s390_compat_regs_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int rc = 0;
-
- if (target == current)
- save_access_regs(target->thread.acrs);
-
- if (kbuf) {
- const compat_ulong_t *k = kbuf;
- while (count > 0 && !rc) {
- rc = __poke_user_compat(target, pos, *k++);
- count -= sizeof(*k);
- pos += sizeof(*k);
- }
- } else {
- const compat_ulong_t __user *u = ubuf;
- while (count > 0 && !rc) {
- compat_ulong_t word;
- rc = __get_user(word, u++);
- if (rc)
- break;
- rc = __poke_user_compat(target, pos, word);
- count -= sizeof(*u);
- pos += sizeof(*u);
- }
- }
-
- if (rc == 0 && target == current)
- restore_access_regs(target->thread.acrs);
-
- return rc;
-}
-
-static int s390_compat_regs_high_get(struct task_struct *target,
- const struct user_regset *regset,
- struct membuf to)
-{
- compat_ulong_t *gprs_high;
- int i;
-
- gprs_high = (compat_ulong_t *)task_pt_regs(target)->gprs;
- for (i = 0; i < NUM_GPRS; i++, gprs_high += 2)
- membuf_store(&to, *gprs_high);
- return 0;
-}
-
-static int s390_compat_regs_high_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- compat_ulong_t *gprs_high;
- int rc = 0;
-
- gprs_high = (compat_ulong_t *)
- &task_pt_regs(target)->gprs[pos / sizeof(compat_ulong_t)];
- if (kbuf) {
- const compat_ulong_t *k = kbuf;
- while (count > 0) {
- *gprs_high = *k++;
- *gprs_high += 2;
- count -= sizeof(*k);
- }
- } else {
- const compat_ulong_t __user *u = ubuf;
- while (count > 0 && !rc) {
- unsigned long word;
- rc = __get_user(word, u++);
- if (rc)
- break;
- *gprs_high = word;
- *gprs_high += 2;
- count -= sizeof(*u);
- }
- }
-
- return rc;
-}
-
-static int s390_compat_last_break_get(struct task_struct *target,
- const struct user_regset *regset,
- struct membuf to)
-{
- compat_ulong_t last_break = target->thread.last_break;
-
- return membuf_store(&to, (unsigned long)last_break);
-}
-
-static int s390_compat_last_break_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- return 0;
-}
-
-static const struct user_regset s390_compat_regsets[] = {
- {
- USER_REGSET_NOTE_TYPE(PRSTATUS),
- .n = sizeof(s390_compat_regs) / sizeof(compat_long_t),
- .size = sizeof(compat_long_t),
- .align = sizeof(compat_long_t),
- .regset_get = s390_compat_regs_get,
- .set = s390_compat_regs_set,
- },
- {
- USER_REGSET_NOTE_TYPE(PRFPREG),
- .n = sizeof(s390_fp_regs) / sizeof(compat_long_t),
- .size = sizeof(compat_long_t),
- .align = sizeof(compat_long_t),
- .regset_get = s390_fpregs_get,
- .set = s390_fpregs_set,
- },
- {
- USER_REGSET_NOTE_TYPE(S390_SYSTEM_CALL),
- .n = 1,
- .size = sizeof(compat_uint_t),
- .align = sizeof(compat_uint_t),
- .regset_get = s390_system_call_get,
- .set = s390_system_call_set,
- },
- {
- USER_REGSET_NOTE_TYPE(S390_LAST_BREAK),
- .n = 1,
- .size = sizeof(long),
- .align = sizeof(long),
- .regset_get = s390_compat_last_break_get,
- .set = s390_compat_last_break_set,
- },
- {
- USER_REGSET_NOTE_TYPE(S390_TDB),
- .n = 1,
- .size = 256,
- .align = 1,
- .regset_get = s390_tdb_get,
- .set = s390_tdb_set,
- },
- {
- USER_REGSET_NOTE_TYPE(S390_VXRS_LOW),
- .n = __NUM_VXRS_LOW,
- .size = sizeof(__u64),
- .align = sizeof(__u64),
- .regset_get = s390_vxrs_low_get,
- .set = s390_vxrs_low_set,
- },
- {
- USER_REGSET_NOTE_TYPE(S390_VXRS_HIGH),
- .n = __NUM_VXRS_HIGH,
- .size = sizeof(__vector128),
- .align = sizeof(__vector128),
- .regset_get = s390_vxrs_high_get,
- .set = s390_vxrs_high_set,
- },
- {
- USER_REGSET_NOTE_TYPE(S390_HIGH_GPRS),
- .n = sizeof(s390_compat_regs_high) / sizeof(compat_long_t),
- .size = sizeof(compat_long_t),
- .align = sizeof(compat_long_t),
- .regset_get = s390_compat_regs_high_get,
- .set = s390_compat_regs_high_set,
- },
- {
- USER_REGSET_NOTE_TYPE(S390_GS_CB),
- .n = sizeof(struct gs_cb) / sizeof(__u64),
- .size = sizeof(__u64),
- .align = sizeof(__u64),
- .regset_get = s390_gs_cb_get,
- .set = s390_gs_cb_set,
- },
- {
- USER_REGSET_NOTE_TYPE(S390_GS_BC),
- .n = sizeof(struct gs_cb) / sizeof(__u64),
- .size = sizeof(__u64),
- .align = sizeof(__u64),
- .regset_get = s390_gs_bc_get,
- .set = s390_gs_bc_set,
- },
- {
- USER_REGSET_NOTE_TYPE(S390_RI_CB),
- .n = sizeof(struct runtime_instr_cb) / sizeof(__u64),
- .size = sizeof(__u64),
- .align = sizeof(__u64),
- .regset_get = s390_runtime_instr_get,
- .set = s390_runtime_instr_set,
- },
-};
-
-static const struct user_regset_view user_s390_compat_view = {
- .name = "s390",
- .e_machine = EM_S390,
- .regsets = s390_compat_regsets,
- .n = ARRAY_SIZE(s390_compat_regsets)
-};
-#endif
-
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
{
-#ifdef CONFIG_COMPAT
- if (test_tsk_thread_flag(task, TIF_31BIT))
- return &user_s390_compat_view;
-#endif
return &user_s390_view;
}
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