diff options
Diffstat (limited to 'arch/sparc/kernel/ptrace_64.c')
| -rw-r--r-- | arch/sparc/kernel/ptrace_64.c | 1090 |
1 files changed, 1090 insertions, 0 deletions
diff --git a/arch/sparc/kernel/ptrace_64.c b/arch/sparc/kernel/ptrace_64.c new file mode 100644 index 000000000000..a941c610e7ce --- /dev/null +++ b/arch/sparc/kernel/ptrace_64.c @@ -0,0 +1,1090 @@ +/* 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); +} |