/* 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/security.h> #include <linux/seccomp.h> #include <linux/audit.h> #include <linux/signal.h> #include <linux/regset.h> #include <linux/tracehook.h> #include <trace/syscall.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> #define CREATE_TRACE_POINTS #include <trace/events/syscalls.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]; reg_window -= 16; 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]; reg_window -= 16; 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]; reg_window -= 16; 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]; reg_window -= 16; 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, unsigned long addr, unsigned 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; void __user *addr2p; int ret; pregs = (struct pt_regs __user *) addr; fps = (struct fps __user *) addr; addr2p = (void __user *) addr2; 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, addr2p, data); if (ret == data) ret = 0; else if (ret >= 0) ret = -EIO; break; case PTRACE_WRITETEXT: case PTRACE_WRITEDATA: ret = ptrace_writedata(child, addr2p, 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(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) trace_sys_enter(regs, regs->u_regs[UREG_G1]); 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) { audit_syscall_exit(regs); if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) trace_sys_exit(regs, regs->u_regs[UREG_G1]); if (test_thread_flag(TIF_SYSCALL_TRACE)) tracehook_report_syscall_exit(regs, 0); }