+++ /dev/null
-/* ptrace.c: Sparc process tracing support.
- *
- * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
- * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- *
- * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
- * and David Mosberger.
- *
- * Added Linux support -miguel (weird, eh?, the original code was meant
- * to emulate SunOS).
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/security.h>
-#include <linux/seccomp.h>
-#include <linux/audit.h>
-#include <linux/signal.h>
-#include <linux/regset.h>
-#include <linux/tracehook.h>
-#include <linux/compat.h>
-#include <linux/elf.h>
-
-#include <asm/asi.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/psrcompat.h>
-#include <asm/visasm.h>
-#include <asm/spitfire.h>
-#include <asm/page.h>
-#include <asm/cpudata.h>
-#include <asm/cacheflush.h>
-
-#include "entry.h"
-
-/* #define ALLOW_INIT_TRACING */
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- /* nothing to do */
-}
-
-/* To get the necessary page struct, access_process_vm() first calls
- * get_user_pages(). This has done a flush_dcache_page() on the
- * accessed page. Then our caller (copy_{to,from}_user_page()) did
- * to memcpy to read/write the data from that page.
- *
- * Now, the only thing we have to do is:
- * 1) flush the D-cache if it's possible than an illegal alias
- * has been created
- * 2) flush the I-cache if this is pre-cheetah and we did a write
- */
-void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
- unsigned long uaddr, void *kaddr,
- unsigned long len, int write)
-{
- BUG_ON(len > PAGE_SIZE);
-
- if (tlb_type == hypervisor)
- return;
-
- preempt_disable();
-
-#ifdef DCACHE_ALIASING_POSSIBLE
- /* If bit 13 of the kernel address we used to access the
- * user page is the same as the virtual address that page
- * is mapped to in the user's address space, we can skip the
- * D-cache flush.
- */
- if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) {
- unsigned long start = __pa(kaddr);
- unsigned long end = start + len;
- unsigned long dcache_line_size;
-
- dcache_line_size = local_cpu_data().dcache_line_size;
-
- if (tlb_type == spitfire) {
- for (; start < end; start += dcache_line_size)
- spitfire_put_dcache_tag(start & 0x3fe0, 0x0);
- } else {
- start &= ~(dcache_line_size - 1);
- for (; start < end; start += dcache_line_size)
- __asm__ __volatile__(
- "stxa %%g0, [%0] %1\n\t"
- "membar #Sync"
- : /* no outputs */
- : "r" (start),
- "i" (ASI_DCACHE_INVALIDATE));
- }
- }
-#endif
- if (write && tlb_type == spitfire) {
- unsigned long start = (unsigned long) kaddr;
- unsigned long end = start + len;
- unsigned long icache_line_size;
-
- icache_line_size = local_cpu_data().icache_line_size;
-
- for (; start < end; start += icache_line_size)
- flushi(start);
- }
-
- preempt_enable();
-}
-
-static int get_from_target(struct task_struct *target, unsigned long uaddr,
- void *kbuf, int len)
-{
- if (target == current) {
- if (copy_from_user(kbuf, (void __user *) uaddr, len))
- return -EFAULT;
- } else {
- int len2 = access_process_vm(target, uaddr, kbuf, len, 0);
- if (len2 != len)
- return -EFAULT;
- }
- return 0;
-}
-
-static int set_to_target(struct task_struct *target, unsigned long uaddr,
- void *kbuf, int len)
-{
- if (target == current) {
- if (copy_to_user((void __user *) uaddr, kbuf, len))
- return -EFAULT;
- } else {
- int len2 = access_process_vm(target, uaddr, kbuf, len, 1);
- if (len2 != len)
- return -EFAULT;
- }
- return 0;
-}
-
-static int regwindow64_get(struct task_struct *target,
- const struct pt_regs *regs,
- struct reg_window *wbuf)
-{
- unsigned long rw_addr = regs->u_regs[UREG_I6];
-
- if (test_tsk_thread_flag(current, TIF_32BIT)) {
- struct reg_window32 win32;
- int i;
-
- if (get_from_target(target, rw_addr, &win32, sizeof(win32)))
- return -EFAULT;
- for (i = 0; i < 8; i++)
- wbuf->locals[i] = win32.locals[i];
- for (i = 0; i < 8; i++)
- wbuf->ins[i] = win32.ins[i];
- } else {
- rw_addr += STACK_BIAS;
- if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf)))
- return -EFAULT;
- }
-
- return 0;
-}
-
-static int regwindow64_set(struct task_struct *target,
- const struct pt_regs *regs,
- struct reg_window *wbuf)
-{
- unsigned long rw_addr = regs->u_regs[UREG_I6];
-
- if (test_tsk_thread_flag(current, TIF_32BIT)) {
- struct reg_window32 win32;
- int i;
-
- for (i = 0; i < 8; i++)
- win32.locals[i] = wbuf->locals[i];
- for (i = 0; i < 8; i++)
- win32.ins[i] = wbuf->ins[i];
-
- if (set_to_target(target, rw_addr, &win32, sizeof(win32)))
- return -EFAULT;
- } else {
- rw_addr += STACK_BIAS;
- if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf)))
- return -EFAULT;
- }
-
- return 0;
-}
-
-enum sparc_regset {
- REGSET_GENERAL,
- REGSET_FP,
-};
-
-static int genregs64_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- const struct pt_regs *regs = task_pt_regs(target);
- int ret;
-
- if (target == current)
- flushw_user();
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- regs->u_regs,
- 0, 16 * sizeof(u64));
- if (!ret && count && pos < (32 * sizeof(u64))) {
- struct reg_window window;
-
- if (regwindow64_get(target, regs, &window))
- return -EFAULT;
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &window,
- 16 * sizeof(u64),
- 32 * sizeof(u64));
- }
-
- if (!ret) {
- /* TSTATE, TPC, TNPC */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- ®s->tstate,
- 32 * sizeof(u64),
- 35 * sizeof(u64));
- }
-
- if (!ret) {
- unsigned long y = regs->y;
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &y,
- 35 * sizeof(u64),
- 36 * sizeof(u64));
- }
-
- if (!ret) {
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 36 * sizeof(u64), -1);
-
- }
- return ret;
-}
-
-static int genregs64_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- struct pt_regs *regs = task_pt_regs(target);
- int ret;
-
- if (target == current)
- flushw_user();
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- regs->u_regs,
- 0, 16 * sizeof(u64));
- if (!ret && count && pos < (32 * sizeof(u64))) {
- struct reg_window window;
-
- if (regwindow64_get(target, regs, &window))
- return -EFAULT;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &window,
- 16 * sizeof(u64),
- 32 * sizeof(u64));
-
- if (!ret &&
- regwindow64_set(target, regs, &window))
- return -EFAULT;
- }
-
- if (!ret && count > 0) {
- unsigned long tstate;
-
- /* TSTATE */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &tstate,
- 32 * sizeof(u64),
- 33 * sizeof(u64));
- if (!ret) {
- /* Only the condition codes and the "in syscall"
- * state can be modified in the %tstate register.
- */
- tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
- regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
- regs->tstate |= tstate;
- }
- }
-
- if (!ret) {
- /* TPC, TNPC */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- ®s->tpc,
- 33 * sizeof(u64),
- 35 * sizeof(u64));
- }
-
- if (!ret) {
- unsigned long y;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &y,
- 35 * sizeof(u64),
- 36 * sizeof(u64));
- if (!ret)
- regs->y = y;
- }
-
- if (!ret)
- ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- 36 * sizeof(u64), -1);
-
- return ret;
-}
-
-static int fpregs64_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- const unsigned long *fpregs = task_thread_info(target)->fpregs;
- unsigned long fprs, fsr, gsr;
- int ret;
-
- if (target == current)
- save_and_clear_fpu();
-
- fprs = task_thread_info(target)->fpsaved[0];
-
- if (fprs & FPRS_DL)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- fpregs,
- 0, 16 * sizeof(u64));
- else
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 0,
- 16 * sizeof(u64));
-
- if (!ret) {
- if (fprs & FPRS_DU)
- ret = user_regset_copyout(&pos, &count,
- &kbuf, &ubuf,
- fpregs + 16,
- 16 * sizeof(u64),
- 32 * sizeof(u64));
- else
- ret = user_regset_copyout_zero(&pos, &count,
- &kbuf, &ubuf,
- 16 * sizeof(u64),
- 32 * sizeof(u64));
- }
-
- if (fprs & FPRS_FEF) {
- fsr = task_thread_info(target)->xfsr[0];
- gsr = task_thread_info(target)->gsr[0];
- } else {
- fsr = gsr = 0;
- }
-
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &fsr,
- 32 * sizeof(u64),
- 33 * sizeof(u64));
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &gsr,
- 33 * sizeof(u64),
- 34 * sizeof(u64));
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &fprs,
- 34 * sizeof(u64),
- 35 * sizeof(u64));
-
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 35 * sizeof(u64), -1);
-
- return ret;
-}
-
-static int fpregs64_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- unsigned long *fpregs = task_thread_info(target)->fpregs;
- unsigned long fprs;
- int ret;
-
- if (target == current)
- save_and_clear_fpu();
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- fpregs,
- 0, 32 * sizeof(u64));
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- task_thread_info(target)->xfsr,
- 32 * sizeof(u64),
- 33 * sizeof(u64));
- if (!ret)
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- task_thread_info(target)->gsr,
- 33 * sizeof(u64),
- 34 * sizeof(u64));
-
- fprs = task_thread_info(target)->fpsaved[0];
- if (!ret && count > 0) {
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &fprs,
- 34 * sizeof(u64),
- 35 * sizeof(u64));
- }
-
- fprs |= (FPRS_FEF | FPRS_DL | FPRS_DU);
- task_thread_info(target)->fpsaved[0] = fprs;
-
- if (!ret)
- ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- 35 * sizeof(u64), -1);
- return ret;
-}
-
-static const struct user_regset sparc64_regsets[] = {
- /* Format is:
- * G0 --> G7
- * O0 --> O7
- * L0 --> L7
- * I0 --> I7
- * TSTATE, TPC, TNPC, Y
- */
- [REGSET_GENERAL] = {
- .core_note_type = NT_PRSTATUS,
- .n = 36,
- .size = sizeof(u64), .align = sizeof(u64),
- .get = genregs64_get, .set = genregs64_set
- },
- /* Format is:
- * F0 --> F63
- * FSR
- * GSR
- * FPRS
- */
- [REGSET_FP] = {
- .core_note_type = NT_PRFPREG,
- .n = 35,
- .size = sizeof(u64), .align = sizeof(u64),
- .get = fpregs64_get, .set = fpregs64_set
- },
-};
-
-static const struct user_regset_view user_sparc64_view = {
- .name = "sparc64", .e_machine = EM_SPARCV9,
- .regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets)
-};
-
-#ifdef CONFIG_COMPAT
-static int genregs32_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- const struct pt_regs *regs = task_pt_regs(target);
- compat_ulong_t __user *reg_window;
- compat_ulong_t *k = kbuf;
- compat_ulong_t __user *u = ubuf;
- compat_ulong_t reg;
-
- if (target == current)
- flushw_user();
-
- pos /= sizeof(reg);
- count /= sizeof(reg);
-
- if (kbuf) {
- for (; count > 0 && pos < 16; count--)
- *k++ = regs->u_regs[pos++];
-
- reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- if (target == current) {
- for (; count > 0 && pos < 32; count--) {
- if (get_user(*k++, ®_window[pos++]))
- return -EFAULT;
- }
- } else {
- for (; count > 0 && pos < 32; count--) {
- if (access_process_vm(target,
- (unsigned long)
- ®_window[pos],
- k, sizeof(*k), 0)
- != sizeof(*k))
- return -EFAULT;
- k++;
- pos++;
- }
- }
- } else {
- for (; count > 0 && pos < 16; count--) {
- if (put_user((compat_ulong_t) regs->u_regs[pos++], u++))
- return -EFAULT;
- }
-
- reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- if (target == current) {
- for (; count > 0 && pos < 32; count--) {
- if (get_user(reg, ®_window[pos++]) ||
- put_user(reg, u++))
- return -EFAULT;
- }
- } else {
- for (; count > 0 && pos < 32; count--) {
- if (access_process_vm(target,
- (unsigned long)
- ®_window[pos],
- ®, sizeof(reg), 0)
- != sizeof(reg))
- return -EFAULT;
- if (access_process_vm(target,
- (unsigned long) u,
- ®, sizeof(reg), 1)
- != sizeof(reg))
- return -EFAULT;
- pos++;
- u++;
- }
- }
- }
- while (count > 0) {
- switch (pos) {
- case 32: /* PSR */
- reg = tstate_to_psr(regs->tstate);
- break;
- case 33: /* PC */
- reg = regs->tpc;
- break;
- case 34: /* NPC */
- reg = regs->tnpc;
- break;
- case 35: /* Y */
- reg = regs->y;
- break;
- case 36: /* WIM */
- case 37: /* TBR */
- reg = 0;
- break;
- default:
- goto finish;
- }
-
- if (kbuf)
- *k++ = reg;
- else if (put_user(reg, u++))
- return -EFAULT;
- pos++;
- count--;
- }
-finish:
- pos *= sizeof(reg);
- count *= sizeof(reg);
-
- return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 38 * sizeof(reg), -1);
-}
-
-static int genregs32_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- struct pt_regs *regs = task_pt_regs(target);
- compat_ulong_t __user *reg_window;
- const compat_ulong_t *k = kbuf;
- const compat_ulong_t __user *u = ubuf;
- compat_ulong_t reg;
-
- if (target == current)
- flushw_user();
-
- pos /= sizeof(reg);
- count /= sizeof(reg);
-
- if (kbuf) {
- for (; count > 0 && pos < 16; count--)
- regs->u_regs[pos++] = *k++;
-
- reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- if (target == current) {
- for (; count > 0 && pos < 32; count--) {
- if (put_user(*k++, ®_window[pos++]))
- return -EFAULT;
- }
- } else {
- for (; count > 0 && pos < 32; count--) {
- if (access_process_vm(target,
- (unsigned long)
- ®_window[pos],
- (void *) k,
- sizeof(*k), 1)
- != sizeof(*k))
- return -EFAULT;
- k++;
- pos++;
- }
- }
- } else {
- for (; count > 0 && pos < 16; count--) {
- if (get_user(reg, u++))
- return -EFAULT;
- regs->u_regs[pos++] = reg;
- }
-
- reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
- if (target == current) {
- for (; count > 0 && pos < 32; count--) {
- if (get_user(reg, u++) ||
- put_user(reg, ®_window[pos++]))
- return -EFAULT;
- }
- } else {
- for (; count > 0 && pos < 32; count--) {
- if (access_process_vm(target,
- (unsigned long)
- u,
- ®, sizeof(reg), 0)
- != sizeof(reg))
- return -EFAULT;
- if (access_process_vm(target,
- (unsigned long)
- ®_window[pos],
- ®, sizeof(reg), 1)
- != sizeof(reg))
- return -EFAULT;
- pos++;
- u++;
- }
- }
- }
- while (count > 0) {
- unsigned long tstate;
-
- if (kbuf)
- reg = *k++;
- else if (get_user(reg, u++))
- return -EFAULT;
-
- switch (pos) {
- case 32: /* PSR */
- tstate = regs->tstate;
- tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
- tstate |= psr_to_tstate_icc(reg);
- if (reg & PSR_SYSCALL)
- tstate |= TSTATE_SYSCALL;
- regs->tstate = tstate;
- break;
- case 33: /* PC */
- regs->tpc = reg;
- break;
- case 34: /* NPC */
- regs->tnpc = reg;
- break;
- case 35: /* Y */
- regs->y = reg;
- break;
- case 36: /* WIM */
- case 37: /* TBR */
- break;
- default:
- goto finish;
- }
-
- pos++;
- count--;
- }
-finish:
- pos *= sizeof(reg);
- count *= sizeof(reg);
-
- return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- 38 * sizeof(reg), -1);
-}
-
-static int fpregs32_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- const unsigned long *fpregs = task_thread_info(target)->fpregs;
- compat_ulong_t enabled;
- unsigned long fprs;
- compat_ulong_t fsr;
- int ret = 0;
-
- if (target == current)
- save_and_clear_fpu();
-
- fprs = task_thread_info(target)->fpsaved[0];
- if (fprs & FPRS_FEF) {
- fsr = task_thread_info(target)->xfsr[0];
- enabled = 1;
- } else {
- fsr = 0;
- enabled = 0;
- }
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- fpregs,
- 0, 32 * sizeof(u32));
-
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 32 * sizeof(u32),
- 33 * sizeof(u32));
- if (!ret)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &fsr,
- 33 * sizeof(u32),
- 34 * sizeof(u32));
-
- if (!ret) {
- compat_ulong_t val;
-
- val = (enabled << 8) | (8 << 16);
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &val,
- 34 * sizeof(u32),
- 35 * sizeof(u32));
- }
-
- if (!ret)
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 35 * sizeof(u32), -1);
-
- return ret;
-}
-
-static int fpregs32_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- unsigned long *fpregs = task_thread_info(target)->fpregs;
- unsigned long fprs;
- int ret;
-
- if (target == current)
- save_and_clear_fpu();
-
- fprs = task_thread_info(target)->fpsaved[0];
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- fpregs,
- 0, 32 * sizeof(u32));
- if (!ret)
- user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- 32 * sizeof(u32),
- 33 * sizeof(u32));
- if (!ret && count > 0) {
- compat_ulong_t fsr;
- unsigned long val;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &fsr,
- 33 * sizeof(u32),
- 34 * sizeof(u32));
- if (!ret) {
- val = task_thread_info(target)->xfsr[0];
- val &= 0xffffffff00000000UL;
- val |= fsr;
- task_thread_info(target)->xfsr[0] = val;
- }
- }
-
- fprs |= (FPRS_FEF | FPRS_DL);
- task_thread_info(target)->fpsaved[0] = fprs;
-
- if (!ret)
- ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- 34 * sizeof(u32), -1);
- return ret;
-}
-
-static const struct user_regset sparc32_regsets[] = {
- /* Format is:
- * G0 --> G7
- * O0 --> O7
- * L0 --> L7
- * I0 --> I7
- * PSR, PC, nPC, Y, WIM, TBR
- */
- [REGSET_GENERAL] = {
- .core_note_type = NT_PRSTATUS,
- .n = 38,
- .size = sizeof(u32), .align = sizeof(u32),
- .get = genregs32_get, .set = genregs32_set
- },
- /* Format is:
- * F0 --> F31
- * empty 32-bit word
- * FSR (32--bit word)
- * FPU QUEUE COUNT (8-bit char)
- * FPU QUEUE ENTRYSIZE (8-bit char)
- * FPU ENABLED (8-bit char)
- * empty 8-bit char
- * FPU QUEUE (64 32-bit ints)
- */
- [REGSET_FP] = {
- .core_note_type = NT_PRFPREG,
- .n = 99,
- .size = sizeof(u32), .align = sizeof(u32),
- .get = fpregs32_get, .set = fpregs32_set
- },
-};
-
-static const struct user_regset_view user_sparc32_view = {
- .name = "sparc", .e_machine = EM_SPARC,
- .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
-};
-#endif /* CONFIG_COMPAT */
-
-const struct user_regset_view *task_user_regset_view(struct task_struct *task)
-{
-#ifdef CONFIG_COMPAT
- if (test_tsk_thread_flag(task, TIF_32BIT))
- return &user_sparc32_view;
-#endif
- return &user_sparc64_view;
-}
-
-#ifdef CONFIG_COMPAT
-struct compat_fps {
- unsigned int regs[32];
- unsigned int fsr;
- unsigned int flags;
- unsigned int extra;
- unsigned int fpqd;
- struct compat_fq {
- unsigned int insnaddr;
- unsigned int insn;
- } fpq[16];
-};
-
-long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
- compat_ulong_t caddr, compat_ulong_t cdata)
-{
- const struct user_regset_view *view = task_user_regset_view(current);
- compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];
- struct pt_regs32 __user *pregs;
- struct compat_fps __user *fps;
- unsigned long addr2 = caddr2;
- unsigned long addr = caddr;
- unsigned long data = cdata;
- int ret;
-
- pregs = (struct pt_regs32 __user *) addr;
- fps = (struct compat_fps __user *) addr;
-
- switch (request) {
- case PTRACE_PEEKUSR:
- ret = (addr != 0) ? -EIO : 0;
- break;
-
- case PTRACE_GETREGS:
- ret = copy_regset_to_user(child, view, REGSET_GENERAL,
- 32 * sizeof(u32),
- 4 * sizeof(u32),
- &pregs->psr);
- if (!ret)
- ret = copy_regset_to_user(child, view, REGSET_GENERAL,
- 1 * sizeof(u32),
- 15 * sizeof(u32),
- &pregs->u_regs[0]);
- break;
-
- case PTRACE_SETREGS:
- ret = copy_regset_from_user(child, view, REGSET_GENERAL,
- 32 * sizeof(u32),
- 4 * sizeof(u32),
- &pregs->psr);
- if (!ret)
- ret = copy_regset_from_user(child, view, REGSET_GENERAL,
- 1 * sizeof(u32),
- 15 * sizeof(u32),
- &pregs->u_regs[0]);
- break;
-
- case PTRACE_GETFPREGS:
- ret = copy_regset_to_user(child, view, REGSET_FP,
- 0 * sizeof(u32),
- 32 * sizeof(u32),
- &fps->regs[0]);
- if (!ret)
- ret = copy_regset_to_user(child, view, REGSET_FP,
- 33 * sizeof(u32),
- 1 * sizeof(u32),
- &fps->fsr);
- if (!ret) {
- if (__put_user(0, &fps->flags) ||
- __put_user(0, &fps->extra) ||
- __put_user(0, &fps->fpqd) ||
- clear_user(&fps->fpq[0], 32 * sizeof(unsigned int)))
- ret = -EFAULT;
- }
- break;
-
- case PTRACE_SETFPREGS:
- ret = copy_regset_from_user(child, view, REGSET_FP,
- 0 * sizeof(u32),
- 32 * sizeof(u32),
- &fps->regs[0]);
- if (!ret)
- ret = copy_regset_from_user(child, view, REGSET_FP,
- 33 * sizeof(u32),
- 1 * sizeof(u32),
- &fps->fsr);
- break;
-
- case PTRACE_READTEXT:
- case PTRACE_READDATA:
- ret = ptrace_readdata(child, addr,
- (char __user *)addr2, data);
- if (ret == data)
- ret = 0;
- else if (ret >= 0)
- ret = -EIO;
- break;
-
- case PTRACE_WRITETEXT:
- case PTRACE_WRITEDATA:
- ret = ptrace_writedata(child, (char __user *) addr2,
- addr, data);
- if (ret == data)
- ret = 0;
- else if (ret >= 0)
- ret = -EIO;
- break;
-
- default:
- if (request == PTRACE_SPARC_DETACH)
- request = PTRACE_DETACH;
- ret = compat_ptrace_request(child, request, addr, data);
- break;
- }
-
- return ret;
-}
-#endif /* CONFIG_COMPAT */
-
-struct fps {
- unsigned int regs[64];
- unsigned long fsr;
-};
-
-long arch_ptrace(struct task_struct *child, long request, long addr, long data)
-{
- const struct user_regset_view *view = task_user_regset_view(current);
- unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
- struct pt_regs __user *pregs;
- struct fps __user *fps;
- int ret;
-
- pregs = (struct pt_regs __user *) (unsigned long) addr;
- fps = (struct fps __user *) (unsigned long) addr;
-
- switch (request) {
- case PTRACE_PEEKUSR:
- ret = (addr != 0) ? -EIO : 0;
- break;
-
- case PTRACE_GETREGS64:
- ret = copy_regset_to_user(child, view, REGSET_GENERAL,
- 1 * sizeof(u64),
- 15 * sizeof(u64),
- &pregs->u_regs[0]);
- if (!ret) {
- /* XXX doesn't handle 'y' register correctly XXX */
- ret = copy_regset_to_user(child, view, REGSET_GENERAL,
- 32 * sizeof(u64),
- 4 * sizeof(u64),
- &pregs->tstate);
- }
- break;
-
- case PTRACE_SETREGS64:
- ret = copy_regset_from_user(child, view, REGSET_GENERAL,
- 1 * sizeof(u64),
- 15 * sizeof(u64),
- &pregs->u_regs[0]);
- if (!ret) {
- /* XXX doesn't handle 'y' register correctly XXX */
- ret = copy_regset_from_user(child, view, REGSET_GENERAL,
- 32 * sizeof(u64),
- 4 * sizeof(u64),
- &pregs->tstate);
- }
- break;
-
- case PTRACE_GETFPREGS64:
- ret = copy_regset_to_user(child, view, REGSET_FP,
- 0 * sizeof(u64),
- 33 * sizeof(u64),
- fps);
- break;
-
- case PTRACE_SETFPREGS64:
- ret = copy_regset_from_user(child, view, REGSET_FP,
- 0 * sizeof(u64),
- 33 * sizeof(u64),
- fps);
- break;
-
- case PTRACE_READTEXT:
- case PTRACE_READDATA:
- ret = ptrace_readdata(child, addr,
- (char __user *)addr2, data);
- if (ret == data)
- ret = 0;
- else if (ret >= 0)
- ret = -EIO;
- break;
-
- case PTRACE_WRITETEXT:
- case PTRACE_WRITEDATA:
- ret = ptrace_writedata(child, (char __user *) addr2,
- addr, data);
- if (ret == data)
- ret = 0;
- else if (ret >= 0)
- ret = -EIO;
- break;
-
- default:
- if (request == PTRACE_SPARC_DETACH)
- request = PTRACE_DETACH;
- ret = ptrace_request(child, request, addr, data);
- break;
- }
-
- return ret;
-}
-
-asmlinkage int syscall_trace_enter(struct pt_regs *regs)
-{
- int ret = 0;
-
- /* do the secure computing check first */
- secure_computing(regs->u_regs[UREG_G1]);
-
- if (test_thread_flag(TIF_SYSCALL_TRACE))
- ret = tracehook_report_syscall_entry(regs);
-
- if (unlikely(current->audit_context) && !ret)
- audit_syscall_entry((test_thread_flag(TIF_32BIT) ?
- AUDIT_ARCH_SPARC :
- AUDIT_ARCH_SPARC64),
- regs->u_regs[UREG_G1],
- regs->u_regs[UREG_I0],
- regs->u_regs[UREG_I1],
- regs->u_regs[UREG_I2],
- regs->u_regs[UREG_I3]);
-
- return ret;
-}
-
-asmlinkage void syscall_trace_leave(struct pt_regs *regs)
-{
- if (unlikely(current->audit_context)) {
- unsigned long tstate = regs->tstate;
- int result = AUDITSC_SUCCESS;
-
- if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY)))
- result = AUDITSC_FAILURE;
-
- audit_syscall_exit(result, regs->u_regs[UREG_I0]);
- }
-
- if (test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, 0);
-}
git.openpandora.org / pandora-kernel.git / blobdiff