/* 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/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> /* Returning from ptrace is a bit tricky because the syscall return * low level code assumes any value returned which is negative and * is a valid errno will mean setting the condition codes to indicate * an error return. This doesn't work, so we have this hook. */ static inline void pt_error_return(struct pt_regs *regs, unsigned long error) { regs->u_regs[UREG_I0] = error; regs->tstate |= (TSTATE_ICARRY | TSTATE_XCARRY); regs->tpc = regs->tnpc; regs->tnpc += 4; } static inline void pt_succ_return(struct pt_regs *regs, unsigned long value) { regs->u_regs[UREG_I0] = value; regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY); regs->tpc = regs->tnpc; regs->tnpc += 4; } static inline void pt_succ_return_linux(struct pt_regs *regs, unsigned long value, void __user *addr) { if (test_thread_flag(TIF_32BIT)) { if (put_user(value, (unsigned int __user *) addr)) { pt_error_return(regs, EFAULT); return; } } else { if (put_user(value, (long __user *) addr)) { pt_error_return(regs, EFAULT); return; } } regs->u_regs[UREG_I0] = 0; regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY); regs->tpc = regs->tnpc; regs->tnpc += 4; } static void pt_os_succ_return (struct pt_regs *regs, unsigned long val, void __user *addr) { if (current->personality == PER_SUNOS) pt_succ_return (regs, val); else pt_succ_return_linux (regs, val, addr); } /* #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; #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); } } 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) { unsigned long __user *reg_window = (unsigned long __user *) (regs->u_regs[UREG_I6] + STACK_BIAS); unsigned long window[16]; if (copy_from_user(window, reg_window, sizeof(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 > 0) { unsigned long __user *reg_window = (unsigned long __user *) (regs->u_regs[UREG_I6] + STACK_BIAS); unsigned long window[16]; if (copy_from_user(window, reg_window, sizeof(window))) return -EFAULT; ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, window, 16 * sizeof(u64), 32 * sizeof(u64)); if (!ret && copy_to_user(reg_window, window, sizeof(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 can be modified * in the %tstate register. */ tstate &= (TSTATE_ICC | TSTATE_XCC); regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC); 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 * sizeof(u64), .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 * sizeof(u64), .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) }; 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]; for (; count > 0 && pos < 32; count--) { if (get_user(*k++, ®_window[pos++])) return -EFAULT; } } 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]; for (; count > 0 && pos < 32; count--) { if (get_user(reg, ®_window[pos++]) || put_user(reg, u++)) return -EFAULT; } } 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]; for (; count > 0 && pos < 32; count--) { if (put_user(*k++, ®_window[pos++])) return -EFAULT; } } 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]; for (; count > 0 && pos < 32; count--) { if (get_user(reg, u++) || put_user(reg, ®_window[pos++])) return -EFAULT; } } 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 |= psr_to_tstate_icc(reg); 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 * sizeof(u32), .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 * sizeof(u32), .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) }; const struct user_regset_view *task_user_regset_view(struct task_struct *task) { if (test_tsk_thread_flag(task, TIF_32BIT)) return &user_sparc32_view; return &user_sparc64_view; } asmlinkage void do_ptrace(struct pt_regs *regs) { int request = regs->u_regs[UREG_I0]; pid_t pid = regs->u_regs[UREG_I1]; unsigned long addr = regs->u_regs[UREG_I2]; unsigned long data = regs->u_regs[UREG_I3]; unsigned long addr2 = regs->u_regs[UREG_I4]; struct task_struct *child; int ret; if (test_thread_flag(TIF_32BIT)) { addr &= 0xffffffffUL; data &= 0xffffffffUL; addr2 &= 0xffffffffUL; } lock_kernel(); if (request == PTRACE_TRACEME) { ret = ptrace_traceme(); if (ret < 0) pt_error_return(regs, -ret); else pt_succ_return(regs, 0); goto out; } child = ptrace_get_task_struct(pid); if (IS_ERR(child)) { ret = PTR_ERR(child); pt_error_return(regs, -ret); goto out; } if (request == PTRACE_ATTACH) { if (ptrace_attach(child)) { pt_error_return(regs, EPERM); goto out_tsk; } pt_succ_return(regs, 0); goto out_tsk; } ret = ptrace_check_attach(child, request == PTRACE_KILL); if (ret < 0) { pt_error_return(regs, -ret); goto out_tsk; } if (!(test_thread_flag(TIF_32BIT)) && ((request == PTRACE_READDATA64) || (request == PTRACE_WRITEDATA64) || (request == PTRACE_READTEXT64) || (request == PTRACE_WRITETEXT64) || (request == PTRACE_PEEKTEXT64) || (request == PTRACE_POKETEXT64) || (request == PTRACE_PEEKDATA64) || (request == PTRACE_POKEDATA64))) { addr = regs->u_regs[UREG_G2]; addr2 = regs->u_regs[UREG_G3]; request -= 30; /* wheee... */ } switch(request) { case PTRACE_PEEKUSR: if (addr != 0) pt_error_return(regs, EIO); else pt_succ_return(regs, 0); goto out_tsk; case PTRACE_PEEKTEXT: /* read word at location addr. */ case PTRACE_PEEKDATA: { unsigned long tmp64; unsigned int tmp32; int res, copied; res = -EIO; if (test_thread_flag(TIF_32BIT)) { copied = access_process_vm(child, addr, &tmp32, sizeof(tmp32), 0); tmp64 = (unsigned long) tmp32; if (copied == sizeof(tmp32)) res = 0; } else { copied = access_process_vm(child, addr, &tmp64, sizeof(tmp64), 0); if (copied == sizeof(tmp64)) res = 0; } if (res < 0) pt_error_return(regs, -res); else pt_os_succ_return(regs, tmp64, (void __user *) data); goto out_tsk; } case PTRACE_POKETEXT: /* write the word at location addr. */ case PTRACE_POKEDATA: { unsigned long tmp64; unsigned int tmp32; int copied, res = -EIO; if (test_thread_flag(TIF_32BIT)) { tmp32 = data; copied = access_process_vm(child, addr, &tmp32, sizeof(tmp32), 1); if (copied == sizeof(tmp32)) res = 0; } else { tmp64 = data; copied = access_process_vm(child, addr, &tmp64, sizeof(tmp64), 1); if (copied == sizeof(tmp64)) res = 0; } if (res < 0) pt_error_return(regs, -res); else pt_succ_return(regs, res); goto out_tsk; } case PTRACE_GETREGS: { struct pt_regs32 __user *pregs = (struct pt_regs32 __user *) addr; struct pt_regs *cregs = task_pt_regs(child); int rval; if (__put_user(tstate_to_psr(cregs->tstate), (&pregs->psr)) || __put_user(cregs->tpc, (&pregs->pc)) || __put_user(cregs->tnpc, (&pregs->npc)) || __put_user(cregs->y, (&pregs->y))) { pt_error_return(regs, EFAULT); goto out_tsk; } for (rval = 1; rval < 16; rval++) if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) { pt_error_return(regs, EFAULT); goto out_tsk; } pt_succ_return(regs, 0); goto out_tsk; } case PTRACE_GETREGS64: { struct pt_regs __user *pregs = (struct pt_regs __user *) addr; struct pt_regs *cregs = task_pt_regs(child); unsigned long tpc = cregs->tpc; int rval; if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) tpc &= 0xffffffff; if (__put_user(cregs->tstate, (&pregs->tstate)) || __put_user(tpc, (&pregs->tpc)) || __put_user(cregs->tnpc, (&pregs->tnpc)) || __put_user(cregs->y, (&pregs->y))) { pt_error_return(regs, EFAULT); goto out_tsk; } for (rval = 1; rval < 16; rval++) if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) { pt_error_return(regs, EFAULT); goto out_tsk; } pt_succ_return(regs, 0); goto out_tsk; } case PTRACE_SETREGS: { struct pt_regs32 __user *pregs = (struct pt_regs32 __user *) addr; struct pt_regs *cregs = task_pt_regs(child); unsigned int psr, pc, npc, y; int i; /* Must be careful, tracing process can only set certain * bits in the psr. */ if (__get_user(psr, (&pregs->psr)) || __get_user(pc, (&pregs->pc)) || __get_user(npc, (&pregs->npc)) || __get_user(y, (&pregs->y))) { pt_error_return(regs, EFAULT); goto out_tsk; } cregs->tstate &= ~(TSTATE_ICC); cregs->tstate |= psr_to_tstate_icc(psr); if (!((pc | npc) & 3)) { cregs->tpc = pc; cregs->tnpc = npc; } cregs->y = y; for (i = 1; i < 16; i++) { if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) { pt_error_return(regs, EFAULT); goto out_tsk; } } pt_succ_return(regs, 0); goto out_tsk; } case PTRACE_SETREGS64: { struct pt_regs __user *pregs = (struct pt_regs __user *) addr; struct pt_regs *cregs = task_pt_regs(child); unsigned long tstate, tpc, tnpc, y; int i; /* Must be careful, tracing process can only set certain * bits in the psr. */ if (__get_user(tstate, (&pregs->tstate)) || __get_user(tpc, (&pregs->tpc)) || __get_user(tnpc, (&pregs->tnpc)) || __get_user(y, (&pregs->y))) { pt_error_return(regs, EFAULT); goto out_tsk; } if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) { tpc &= 0xffffffff; tnpc &= 0xffffffff; } tstate &= (TSTATE_ICC | TSTATE_XCC); cregs->tstate &= ~(TSTATE_ICC | TSTATE_XCC); cregs->tstate |= tstate; if (!((tpc | tnpc) & 3)) { cregs->tpc = tpc; cregs->tnpc = tnpc; } cregs->y = y; for (i = 1; i < 16; i++) { if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) { pt_error_return(regs, EFAULT); goto out_tsk; } } pt_succ_return(regs, 0); goto out_tsk; } case PTRACE_GETFPREGS: { struct fps { unsigned int regs[32]; unsigned int fsr; unsigned int flags; unsigned int extra; unsigned int fpqd; struct fq { unsigned int insnaddr; unsigned int insn; } fpq[16]; }; struct fps __user *fps = (struct fps __user *) addr; unsigned long *fpregs = task_thread_info(child)->fpregs; if (copy_to_user(&fps->regs[0], fpregs, (32 * sizeof(unsigned int))) || __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr)) || __put_user(0, (&fps->fpqd)) || __put_user(0, (&fps->flags)) || __put_user(0, (&fps->extra)) || clear_user(&fps->fpq[0], 32 * sizeof(unsigned int))) { pt_error_return(regs, EFAULT); goto out_tsk; } pt_succ_return(regs, 0); goto out_tsk; } case PTRACE_GETFPREGS64: { struct fps { unsigned int regs[64]; unsigned long fsr; }; struct fps __user *fps = (struct fps __user *) addr; unsigned long *fpregs = task_thread_info(child)->fpregs; if (copy_to_user(&fps->regs[0], fpregs, (64 * sizeof(unsigned int))) || __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) { pt_error_return(regs, EFAULT); goto out_tsk; } pt_succ_return(regs, 0); goto out_tsk; } case PTRACE_SETFPREGS: { struct fps { unsigned int regs[32]; unsigned int fsr; unsigned int flags; unsigned int extra; unsigned int fpqd; struct fq { unsigned int insnaddr; unsigned int insn; } fpq[16]; }; struct fps __user *fps = (struct fps __user *) addr; unsigned long *fpregs = task_thread_info(child)->fpregs; unsigned fsr; if (copy_from_user(fpregs, &fps->regs[0], (32 * sizeof(unsigned int))) || __get_user(fsr, (&fps->fsr))) { pt_error_return(regs, EFAULT); goto out_tsk; } task_thread_info(child)->xfsr[0] &= 0xffffffff00000000UL; task_thread_info(child)->xfsr[0] |= fsr; if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF)) task_thread_info(child)->gsr[0] = 0; task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL); pt_succ_return(regs, 0); goto out_tsk; } case PTRACE_SETFPREGS64: { struct fps { unsigned int regs[64]; unsigned long fsr; }; struct fps __user *fps = (struct fps __user *) addr; unsigned long *fpregs = task_thread_info(child)->fpregs; if (copy_from_user(fpregs, &fps->regs[0], (64 * sizeof(unsigned int))) || __get_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) { pt_error_return(regs, EFAULT); goto out_tsk; } if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF)) task_thread_info(child)->gsr[0] = 0; task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL | FPRS_DU); pt_succ_return(regs, 0); goto out_tsk; } case PTRACE_READTEXT: case PTRACE_READDATA: { int res = ptrace_readdata(child, addr, (char __user *)addr2, data); if (res == data) { pt_succ_return(regs, 0); goto out_tsk; } if (res >= 0) res = -EIO; pt_error_return(regs, -res); goto out_tsk; } case PTRACE_WRITETEXT: case PTRACE_WRITEDATA: { int res = ptrace_writedata(child, (char __user *) addr2, addr, data); if (res == data) { pt_succ_return(regs, 0); goto out_tsk; } if (res >= 0) res = -EIO; pt_error_return(regs, -res); goto out_tsk; } case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */ addr = 1; case PTRACE_CONT: { /* restart after signal. */ if (!valid_signal(data)) { pt_error_return(regs, EIO); goto out_tsk; } if (request == PTRACE_SYSCALL) { set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); } else { clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); } child->exit_code = data; wake_up_process(child); pt_succ_return(regs, 0); goto out_tsk; } /* * make the child exit. Best I can do is send it a sigkill. * perhaps it should be put in the status that it wants to * exit. */ case PTRACE_KILL: { if (child->exit_state == EXIT_ZOMBIE) { /* already dead */ pt_succ_return(regs, 0); goto out_tsk; } child->exit_code = SIGKILL; wake_up_process(child); pt_succ_return(regs, 0); goto out_tsk; } case PTRACE_GETEVENTMSG: { int err; if (test_thread_flag(TIF_32BIT)) err = put_user(child->ptrace_message, (unsigned int __user *) data); else err = put_user(child->ptrace_message, (unsigned long __user *) data); if (err) pt_error_return(regs, -err); else pt_succ_return(regs, 0); break; } default: { int err = ptrace_request(child, request, addr, data); if (err) pt_error_return(regs, -err); else pt_succ_return(regs, 0); goto out_tsk; } } out_tsk: if (child) put_task_struct(child); out: unlock_kernel(); } asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p) { /* do the secure computing check first */ secure_computing(regs->u_regs[UREG_G1]); if (unlikely(current->audit_context) && syscall_exit_p) { 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 (!(current->ptrace & PT_PTRACED)) goto out; if (!test_thread_flag(TIF_SYSCALL_TRACE)) goto out; ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) ? 0x80 : 0)); /* * this isn't the same as continuing with a signal, but it will do * for normal use. strace only continues with a signal if the * stopping signal is not SIGTRAP. -brl */ if (current->exit_code) { send_sig(current->exit_code, current, 1); current->exit_code = 0; } out: if (unlikely(current->audit_context) && !syscall_exit_p) 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]); }