/* ptrace.c: Sparc process tracing support.
*
- * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
+ * 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,
#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/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 */
-/* #define DEBUG_PTRACE */
-
-#ifdef DEBUG_PTRACE
-char *pt_rq [] = {
- /* 0 */ "TRACEME", "PEEKTEXT", "PEEKDATA", "PEEKUSR",
- /* 4 */ "POKETEXT", "POKEDATA", "POKEUSR", "CONT",
- /* 8 */ "KILL", "SINGLESTEP", "SUNATTACH", "SUNDETACH",
- /* 12 */ "GETREGS", "SETREGS", "GETFPREGS", "SETFPREGS",
- /* 16 */ "READDATA", "WRITEDATA", "READTEXT", "WRITETEXT",
- /* 20 */ "GETFPAREGS", "SETFPAREGS", "unknown", "unknown",
- /* 24 */ "SYSCALL", ""
-};
-#endif
/*
* Called by kernel/ptrace.c when detaching..
}
}
-asmlinkage void do_ptrace(struct pt_regs *regs)
+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)
{
- 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;
+ const struct pt_regs *regs = task_pt_regs(target);
int ret;
- if (test_thread_flag(TIF_32BIT)) {
- addr &= 0xffffffffUL;
- data &= 0xffffffffUL;
- addr2 &= 0xffffffffUL;
+ 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));
}
- lock_kernel();
-#ifdef DEBUG_PTRACE
- {
- char *s;
- if ((request >= 0) && (request <= 24))
- s = pt_rq [request];
- else
- s = "unknown";
-
- if (request == PTRACE_POKEDATA && data == 0x91d02001){
- printk ("do_ptrace: breakpoint pid=%d, addr=%016lx addr2=%016lx\n",
- pid, addr, addr2);
- } else
- printk("do_ptrace: rq=%s(%d) pid=%d addr=%016lx data=%016lx addr2=%016lx\n",
- s, request, pid, addr, data, addr2);
+ if (!ret) {
+ /* TSTATE, TPC, TNPC */
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ ®s->tstate,
+ 32 * sizeof(u64),
+ 35 * sizeof(u64));
}
-#endif
- if (request == PTRACE_TRACEME) {
- ret = ptrace_traceme();
- if (ret < 0)
- pt_error_return(regs, -ret);
- else
- pt_succ_return(regs, 0);
- goto out;
+
+ if (!ret) {
+ unsigned long y = regs->y;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &y,
+ 35 * sizeof(u64),
+ 36 * sizeof(u64));
}
- child = ptrace_get_task_struct(pid);
- if (IS_ERR(child)) {
- ret = PTR_ERR(child);
- pt_error_return(regs, -ret);
- goto out;
+ 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 ((current->personality == PER_SUNOS && request == PTRACE_SUNATTACH)
- || (current->personality != PER_SUNOS && request == PTRACE_ATTACH)) {
- if (ptrace_attach(child)) {
- pt_error_return(regs, EPERM);
- goto out_tsk;
+ 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;
}
- 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 (!ret) {
+ /* TPC, TNPC */
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ ®s->tpc,
+ 33 * sizeof(u64),
+ 35 * sizeof(u64));
}
- 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... */
- }
+ if (!ret) {
+ unsigned long y;
- 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;
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &y,
+ 35 * sizeof(u64),
+ 36 * sizeof(u64));
+ if (!ret)
+ regs->y = y;
}
- 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);
+ 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
- pt_succ_return(regs, res);
- goto out_tsk;
+ ret = user_regset_copyout_zero(&pos, &count,
+ &kbuf, &ubuf,
+ 16 * sizeof(u64),
+ 32 * sizeof(u64));
}
- 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);
-#ifdef DEBUG_PTRACE
- printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]);
-#endif
- goto out_tsk;
+ if (fprs & FPRS_FEF) {
+ fsr = task_thread_info(target)->xfsr[0];
+ gsr = task_thread_info(target)->gsr[0];
+ } else {
+ fsr = gsr = 0;
}
- 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);
-#ifdef DEBUG_PTRACE
- printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]);
-#endif
- goto out_tsk;
+ 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));
}
- 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;
+ 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;
}
- cregs->tstate &= ~(TSTATE_ICC);
- cregs->tstate |= psr_to_tstate_icc(psr);
- if (!((pc | npc) & 3)) {
- cregs->tpc = pc;
- cregs->tnpc = npc;
+ } else {
+ for (; count > 0 && pos < 16; count--) {
+ if (put_user((compat_ulong_t) regs->u_regs[pos++], u++))
+ return -EFAULT;
}
- 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;
- }
+
+ 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;
}
- pt_succ_return(regs, 0);
- goto out_tsk;
+
+ 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);
+}
- 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;
+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;
}
- if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) {
- tpc &= 0xffffffff;
- tnpc &= 0xffffffff;
+ } else {
+ for (; count > 0 && pos < 16; count--) {
+ if (get_user(reg, u++))
+ return -EFAULT;
+ regs->u_regs[pos++] = reg;
}
- tstate &= (TSTATE_ICC | TSTATE_XCC);
- cregs->tstate &= ~(TSTATE_ICC | TSTATE_XCC);
- cregs->tstate |= tstate;
- if (!((tpc | tnpc) & 3)) {
- cregs->tpc = tpc;
- cregs->tnpc = tnpc;
+
+ 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;
}
- 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;
- }
+ }
+ 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;
}
- pt_succ_return(regs, 0);
- goto out_tsk;
+
+ pos++;
+ count--;
}
+finish:
+ pos *= sizeof(reg);
+ count *= sizeof(reg);
- 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;
+ 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;
}
- 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;
+ 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));
}
- 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;
+ 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;
}
- 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;
+ 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;
+}
+
+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(child);
+ 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;
}
- 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;
- }
+ 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: {
- 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_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: {
- 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_WRITEDATA:
+ ret = ptrace_writedata(child, (char __user *) addr2,
+ addr, data);
+ if (ret == data)
+ ret = 0;
+ else if (ret >= 0)
+ ret = -EIO;
+ break;
+
+ default:
+ ret = compat_ptrace_request(child, request, addr, data);
+ break;
}
- 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;
- }
+ return ret;
+}
- if (request == PTRACE_SYSCALL) {
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- } else {
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- }
+struct fps {
+ unsigned int regs[64];
+ unsigned long fsr;
+};
- child->exit_code = data;
-#ifdef DEBUG_PTRACE
- printk("CONT: %s [%d]: set exit_code = %x %lx %lx\n", child->comm,
- child->pid, child->exit_code,
- task_pt_regs(child)->tpc,
- task_pt_regs(child)->tnpc);
-
-#endif
- wake_up_process(child);
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
+{
+ const struct user_regset_view *view = task_user_regset_view(child);
+ struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
+ unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
+ struct fps __user *fps = (struct fps __user *) addr;
+ int ret;
-/*
- * 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;
+ 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);
}
- child->exit_code = SIGKILL;
- wake_up_process(child);
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
+ break;
- case PTRACE_SUNDETACH: { /* detach a process that was attached. */
- int error = ptrace_detach(child, data);
- if (error) {
- pt_error_return(regs, EIO);
- goto out_tsk;
+ 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);
}
- pt_succ_return(regs, 0);
- goto out_tsk;
- }
+ break;
- /* PTRACE_DUMPCORE unsupported... */
+ case PTRACE_GETFPREGS64:
+ ret = copy_regset_to_user(child, view, REGSET_FP,
+ 0 * sizeof(u64),
+ 33 * sizeof(u64),
+ fps);
+ break;
- case PTRACE_GETEVENTMSG: {
- int err;
+ case PTRACE_SETFPREGS64:
+ ret = copy_regset_to_user(child, view, REGSET_FP,
+ 0 * sizeof(u64),
+ 33 * sizeof(u64),
+ fps);
+ break;
- 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);
+ 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;
- }
- 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;
- }
+ 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:
+ ret = ptrace_request(child, request, addr, data);
+ break;
}
-out_tsk:
- if (child)
- put_task_struct(child);
-out:
- unlock_kernel();
+
+ return ret;
}
asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p)
git.samba.org / sfrench / cifs-2.6.git / blobdiff