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-rw-r--r--arch/sparc64/kernel/ioctl32.c50
-rw-r--r--arch/sparc64/kernel/ptrace.c1028
2 files changed, 1078 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/ioctl32.c b/arch/sparc64/kernel/ioctl32.c
new file mode 100644
index 000000000..3db6fa945
--- /dev/null
+++ b/arch/sparc64/kernel/ioctl32.c
@@ -0,0 +1,50 @@
+/* $Id: ioctl32.c,v 1.3 1997/05/27 19:30:13 jj Exp $
+ * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
+ *
+ * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ *
+ * These routines maintain argument size conversion between 32bit and 64bit
+ * ioctls.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/ioctl.h>
+
+#include <asm/types.h>
+#include <asm/uaccess.h>
+
+/* As gcc will warn about casting u32 to some ptr, we have to cast it to unsigned long first, and that's what is A() for.
+ * You just do (void *)A(x), instead of having to type (void *)((unsigned long)x) or instead of just (void *)x, which will
+ * produce warnings */
+#define A(x) ((unsigned long)x)
+
+extern asmlinkage int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg);
+
+asmlinkage int sys32_ioctl(unsigned int fd, unsigned int cmd, u32 arg)
+{
+ struct file * filp;
+ int error = -EBADF;
+
+ lock_kernel();
+ if (fd >= NR_OPEN || !(filp = current->files->fd[fd]))
+ goto out;
+ if (!filp->f_op || !filp->f_op->ioctl) {
+ error = sys_ioctl (fd, cmd, (unsigned long)arg);
+ goto out;
+ }
+ error = 0;
+ switch (cmd) {
+ default:
+ error = sys_ioctl (fd, cmd, (unsigned long)arg);
+ goto out;
+ }
+out:
+ if (error == -EINVAL) {
+ printk ("sys32_ioctl on %016lx's %08x returns EINVAL\n", filp->f_op ? (long)filp->f_op->ioctl : 0UL, cmd);
+ }
+ unlock_kernel();
+ return error;
+}
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c
new file mode 100644
index 000000000..24fe052cd
--- /dev/null
+++ b/arch/sparc64/kernel/ptrace.c
@@ -0,0 +1,1028 @@
+/* ptrace.c: Sparc process tracing support.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
+ * 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 (wierd, eh?, the orignal 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 <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/psrcompat.h>
+
+#define MAGIC_CONSTANT 0x80000000
+
+/*
+ * This routine gets a long from any process space by following the page
+ * tables. NOTE! You should check that the long isn't on a page boundary,
+ * and that it is in the task area before calling this: this routine does
+ * no checking.
+ */
+static pte_t *get_page(struct task_struct * tsk,
+ struct vm_area_struct * vma, unsigned long addr, int write)
+{
+ pgd_t * pgdir;
+ pmd_t * pgmiddle;
+ pte_t * pgtable;
+
+repeat:
+ pgdir = pgd_offset(vma->vm_mm, addr);
+ if (pgd_none(*pgdir)) {
+ handle_mm_fault(tsk, vma, addr, write);
+ goto repeat;
+ }
+ if (pgd_bad(*pgdir)) {
+ printk("ptrace: bad page directory %016lx\n", pgd_val(*pgdir));
+ pgd_clear(pgdir);
+ return 0;
+ }
+ pgmiddle = pmd_offset(pgdir, addr);
+ if (pmd_none(*pgmiddle)) {
+ handle_mm_fault(tsk, vma, addr, write);
+ goto repeat;
+ }
+ if (pmd_bad(*pgmiddle)) {
+ printk("ptrace: bad page middle %016lx\n", pmd_val(*pgmiddle));
+ pmd_clear(pgmiddle);
+ return 0;
+ }
+ pgtable = pte_offset(pgmiddle, addr);
+ if (!pte_present(*pgtable)) {
+ handle_mm_fault(tsk, vma, addr, write);
+ goto repeat;
+ }
+ if (write && !pte_write(*pgtable)) {
+ handle_mm_fault(tsk, vma, addr, write);
+ goto repeat;
+ }
+ return pgtable;
+}
+
+static inline unsigned long get_long(struct task_struct * tsk,
+ struct vm_area_struct * vma, unsigned long addr)
+{
+ pte_t * pgtable;
+ unsigned long page, retval;
+
+ if (!(pgtable = get_page (tsk, vma, addr, 0))) return 0;
+ page = pte_page(*pgtable);
+/* this is a hack for non-kernel-mapped video buffers and similar */
+ if (MAP_NR(page) >= max_mapnr)
+ return 0;
+ page += addr & ~PAGE_MASK;
+ retval = *(unsigned long *) page;
+ flush_page_to_ram(page);
+ return retval;
+}
+
+static inline void put_long(struct task_struct * tsk, struct vm_area_struct * vma,
+ unsigned long addr, unsigned long data)
+{
+ pte_t *pgtable;
+ unsigned long page;
+
+ if (!(pgtable = get_page (tsk, vma, addr, 1))) return;
+ page = pte_page(*pgtable);
+/* this is a hack for non-kernel-mapped video buffers and similar */
+ flush_cache_page(vma, addr);
+ if (MAP_NR(page) < max_mapnr) {
+ *(unsigned long *) (page + (addr & ~PAGE_MASK)) = data;
+ flush_page_to_ram(page);
+ }
+/* we're bypassing pagetables, so we have to set the dirty bit ourselves */
+/* this should also re-instate whatever read-only mode there was before */
+ set_pte(pgtable, pte_mkdirty(mk_pte(page, vma->vm_page_prot)));
+ flush_tlb_page(vma, addr);
+}
+
+static inline unsigned int get_int(struct task_struct * tsk,
+ struct vm_area_struct * vma, unsigned long addr)
+{
+ pte_t * pgtable;
+ unsigned long page;
+ unsigned int retval;
+
+ if (!(pgtable = get_page (tsk, vma, addr, 0))) return 0;
+ page = pte_page(*pgtable);
+/* this is a hack for non-kernel-mapped video buffers and similar */
+ if (MAP_NR(page) >= max_mapnr)
+ return 0;
+ page += addr & ~PAGE_MASK;
+ retval = *(unsigned int *) page;
+ flush_page_to_ram(page);
+ return retval;
+}
+
+static inline void put_int(struct task_struct * tsk, struct vm_area_struct * vma,
+ unsigned long addr, unsigned int data)
+{
+ pte_t *pgtable;
+ unsigned long page;
+
+ if (!(pgtable = get_page (tsk, vma, addr, 1))) return;
+ page = pte_page(*pgtable);
+/* this is a hack for non-kernel-mapped video buffers and similar */
+ flush_cache_page(vma, addr);
+ if (MAP_NR(page) < max_mapnr) {
+ *(unsigned int *) (page + (addr & ~PAGE_MASK)) = data;
+ flush_page_to_ram(page);
+ }
+/* we're bypassing pagetables, so we have to set the dirty bit ourselves */
+/* this should also re-instate whatever read-only mode there was before */
+ set_pte(pgtable, pte_mkdirty(mk_pte(page, vma->vm_page_prot)));
+ flush_tlb_page(vma, addr);
+}
+
+static struct vm_area_struct * find_extend_vma(struct task_struct * tsk,
+ unsigned long addr)
+{
+ struct vm_area_struct * vma;
+
+ addr &= PAGE_MASK;
+ vma = find_vma(tsk->mm,addr);
+ if (!vma)
+ return NULL;
+ if (vma->vm_start <= addr)
+ return vma;
+ if (!(vma->vm_flags & VM_GROWSDOWN))
+ return NULL;
+ if (vma->vm_end - addr > tsk->rlim[RLIMIT_STACK].rlim_cur)
+ return NULL;
+ vma->vm_offset -= vma->vm_start - addr;
+ vma->vm_start = addr;
+ return vma;
+}
+
+/*
+ * This routine checks the page boundaries, and that the offset is
+ * within the task area. It then calls get_long() to read a long.
+ */
+static int read_long(struct task_struct * tsk, unsigned long addr,
+ unsigned long * result)
+{
+ struct vm_area_struct * vma = find_extend_vma(tsk, addr);
+
+ if (!vma)
+ return -EIO;
+ *result = get_long(tsk, vma, addr);
+ return 0;
+}
+
+/*
+ * This routine checks the page boundaries, and that the offset is
+ * within the task area. It then calls get_int() to read a int.
+ */
+static int read_int(struct task_struct * tsk, unsigned long addr,
+ unsigned int * result)
+{
+ struct vm_area_struct * vma = find_extend_vma(tsk, addr);
+
+ if (!vma)
+ return -EIO;
+ *result = get_int(tsk, vma, addr);
+ return 0;
+}
+
+/*
+ * This routine checks the page boundaries, and that the offset is
+ * within the task area. It then calls put_long() to write a long.
+ */
+static int write_long(struct task_struct * tsk, unsigned long addr,
+ unsigned long data)
+{
+ struct vm_area_struct * vma = find_extend_vma(tsk, addr);
+
+ if (!vma)
+ return -EIO;
+ put_long(tsk, vma, addr, data);
+ return 0;
+}
+
+/*
+ * This routine checks the page boundaries, and that the offset is
+ * within the task area. It then calls put_int() to write a int.
+ */
+static int write_int(struct task_struct * tsk, unsigned long addr,
+ unsigned int data)
+{
+ struct vm_area_struct * vma = find_extend_vma(tsk, addr);
+
+ if (!vma)
+ return -EIO;
+ put_int(tsk, vma, addr, data);
+ return 0;
+}
+
+/* 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, long *addr)
+{
+ if (current->tss.flags & SPARC_FLAG_32BIT) {
+ if(put_user(value, (unsigned int *)addr))
+ return pt_error_return(regs, EFAULT);
+ } else {
+ if(put_user(value, addr))
+ return pt_error_return(regs, EFAULT);
+ }
+ 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, long *addr)
+{
+ if (current->personality & PER_BSD)
+ pt_succ_return (regs, val);
+ else
+ pt_succ_return_linux (regs, val, addr);
+}
+
+#if 0
+/* XXX: Implement this some day */
+/* Fuck me gently with a chainsaw... */
+static inline void read_sunos_user(struct pt_regs *regs, unsigned long offset,
+ struct task_struct *tsk, long *addr)
+{
+ struct pt_regs *cregs = tsk->tss.kregs;
+ struct thread_struct *t = &tsk->tss;
+ int v;
+
+ if(offset >= 1024)
+ offset -= 1024; /* whee... */
+ if(offset & ((sizeof(unsigned int) - 1))) {
+ pt_error_return(regs, EIO);
+ return;
+ }
+ if(offset >= 16 && offset < 784) {
+ offset -= 16; offset >>= 2;
+ pt_os_succ_return(regs, *(((unsigned long *)(&t->reg_window[0]))+offset), addr);
+ return;
+ }
+ if(offset >= 784 && offset < 832) {
+ offset -= 784; offset >>= 2;
+ pt_os_succ_return(regs, *(((unsigned long *)(&t->rwbuf_stkptrs[0]))+offset), addr);
+ return;
+ }
+ switch(offset) {
+ case 0:
+ v = t->ksp;
+ break;
+ case 4:
+ v = t->kpc;
+ break;
+ case 8:
+ v = t->kpsr;
+ break;
+ case 12:
+ v = t->uwinmask;
+ break;
+ case 832:
+ v = t->w_saved;
+ break;
+ case 896:
+ v = cregs->u_regs[UREG_I0];
+ break;
+ case 900:
+ v = cregs->u_regs[UREG_I1];
+ break;
+ case 904:
+ v = cregs->u_regs[UREG_I2];
+ break;
+ case 908:
+ v = cregs->u_regs[UREG_I3];
+ break;
+ case 912:
+ v = cregs->u_regs[UREG_I4];
+ break;
+ case 916:
+ v = cregs->u_regs[UREG_I5];
+ break;
+ case 920:
+ v = cregs->u_regs[UREG_I6];
+ break;
+ case 924:
+ if(tsk->tss.flags & MAGIC_CONSTANT)
+ v = cregs->u_regs[UREG_G1];
+ else
+ v = 0;
+ break;
+ case 940:
+ v = cregs->u_regs[UREG_I0];
+ break;
+ case 944:
+ v = cregs->u_regs[UREG_I1];
+ break;
+
+ case 948:
+ /* Isn't binary compatibility _fun_??? */
+ if(cregs->psr & PSR_C)
+ v = cregs->u_regs[UREG_I0] << 24;
+ else
+ v = 0;
+ break;
+
+ /* Rest of them are completely unsupported. */
+ default:
+ printk("%s [%d]: Wants to read user offset %ld\n",
+ current->comm, current->pid, offset);
+ pt_error_return(regs, EIO);
+ return;
+ }
+ pt_os_succ_return_linux (regs, v, addr);
+ return;
+}
+
+static inline void write_sunos_user(struct pt_regs *regs, unsigned long offset,
+ struct task_struct *tsk)
+{
+ struct pt_regs *cregs = tsk->tss.kregs;
+ struct thread_struct *t = &tsk->tss;
+ unsigned int value = regs->u_regs[UREG_I3];
+
+ if(offset >= 1024)
+ offset -= 1024; /* whee... */
+ if(offset & ((sizeof(unsigned long) - 1)))
+ goto failure;
+ if(offset >= 16 && offset < 784) {
+ offset -= 16; offset >>= 2;
+ *(((unsigned long *)(&t->reg_window[0]))+offset) = value;
+ goto success;
+ }
+ if(offset >= 784 && offset < 832) {
+ offset -= 784; offset >>= 2;
+ *(((unsigned long *)(&t->rwbuf_stkptrs[0]))+offset) = value;
+ goto success;
+ }
+ switch(offset) {
+ case 896:
+ cregs->u_regs[UREG_I0] = value;
+ break;
+ case 900:
+ cregs->u_regs[UREG_I1] = value;
+ break;
+ case 904:
+ cregs->u_regs[UREG_I2] = value;
+ break;
+ case 908:
+ cregs->u_regs[UREG_I3] = value;
+ break;
+ case 912:
+ cregs->u_regs[UREG_I4] = value;
+ break;
+ case 916:
+ cregs->u_regs[UREG_I5] = value;
+ break;
+ case 920:
+ cregs->u_regs[UREG_I6] = value;
+ break;
+ case 924:
+ cregs->u_regs[UREG_I7] = value;
+ break;
+ case 940:
+ cregs->u_regs[UREG_I0] = value;
+ break;
+ case 944:
+ cregs->u_regs[UREG_I1] = value;
+ break;
+
+ /* Rest of them are completely unsupported or "no-touch". */
+ default:
+ printk("%s [%d]: Wants to write user offset %ld\n",
+ current->comm, current->pid, offset);
+ goto failure;
+ }
+success:
+ pt_succ_return(regs, 0);
+ return;
+failure:
+ pt_error_return(regs, EIO);
+ return;
+}
+#endif
+
+/* #define ALLOW_INIT_TRACING */
+/* #define DEBUG_PTRACE */
+
+#ifdef DEBUG_PTRACE
+char *pt_rq [] = {
+"TRACEME",
+"PEEKTEXT",
+"PEEKDATA",
+"PEEKUSR",
+"POKETEXT",
+"POKEDATA",
+"POKEUSR",
+"CONT",
+"KILL",
+"SINGLESTEP",
+"SUNATTACH",
+"SUNDETACH",
+"GETREGS",
+"SETREGS",
+"GETFPREGS",
+"SETFPREGS",
+"READDATA",
+"WRITEDATA",
+"READTEXT",
+"WRITETEXT",
+"GETFPAREGS",
+"SETFPAREGS",
+""
+};
+#endif
+
+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;
+
+ if (current->tss.flags & SPARC_FLAG_32BIT) {
+ addr &= 0xffffffffUL;
+ data &= 0xffffffffUL;
+ addr2 &= 0xffffffffUL;
+ }
+ lock_kernel();
+#ifdef DEBUG_PTRACE
+ {
+ char *s;
+
+ if ((request > 0) && (request < 21))
+ 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);
+ }
+#endif
+ if(request == PTRACE_TRACEME) {
+ /* are we already being traced? */
+ if (current->flags & PF_PTRACED) {
+ pt_error_return(regs, EPERM);
+ goto out;
+ }
+ /* set the ptrace bit in the process flags. */
+ current->flags |= PF_PTRACED;
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+#ifndef ALLOW_INIT_TRACING
+ if(pid == 1) {
+ /* Can't dork with init. */
+ pt_error_return(regs, EPERM);
+ goto out;
+ }
+#endif
+ if(!(child = find_task_by_pid(pid))) {
+ pt_error_return(regs, ESRCH);
+ goto out;
+ }
+
+ if (((current->personality & PER_BSD) && (request == PTRACE_SUNATTACH))
+ || (!(current->personality & PER_BSD) && (request == PTRACE_ATTACH))) {
+ if(child == current) {
+ /* Try this under SunOS/Solaris, bwa haha
+ * You'll never be able to kill the process. ;-)
+ */
+ pt_error_return(regs, EPERM);
+ goto out;
+ }
+ if((!child->dumpable ||
+ (current->uid != child->euid) ||
+ (current->uid != child->uid) ||
+ (current->gid != child->egid) ||
+ (current->gid != child->gid)) && !suser()) {
+ pt_error_return(regs, EPERM);
+ goto out;
+ }
+ /* the same process cannot be attached many times */
+ if (child->flags & PF_PTRACED) {
+ pt_error_return(regs, EPERM);
+ goto out;
+ }
+ child->flags |= PF_PTRACED;
+ if(child->p_pptr != current) {
+ REMOVE_LINKS(child);
+ child->p_pptr = current;
+ SET_LINKS(child);
+ }
+ send_sig(SIGSTOP, child, 1);
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+ if (!(child->flags & PF_PTRACED)
+ && ((current->personality & PER_BSD) && (request != PTRACE_SUNATTACH))
+ && (!(current->personality & PER_BSD) && (request != PTRACE_ATTACH))) {
+ pt_error_return(regs, ESRCH);
+ goto out;
+ }
+ if(child->state != TASK_STOPPED) {
+ if(request != PTRACE_KILL) {
+ pt_error_return(regs, ESRCH);
+ goto out;
+ }
+ }
+ if(child->p_pptr != current) {
+ pt_error_return(regs, ESRCH);
+ goto out;
+ }
+ switch(request) {
+ case PTRACE_PEEKTEXT: /* read word at location addr. */
+ case PTRACE_PEEKDATA: {
+ unsigned long tmp;
+ int res;
+
+#if 0
+ /* XXX Find out what is really going on. */
+ flush_cache_all();
+#endif
+ /* Non-word alignment _not_ allowed on Sparc. */
+ if (current->tss.flags & SPARC_FLAG_32BIT) {
+ unsigned int x;
+ if(addr & (sizeof(unsigned int) - 1)) {
+ pt_error_return(regs, EINVAL);
+ goto out;
+ }
+ res = read_int(child, addr, &x);
+ tmp = x;
+ } else {
+ if(addr & (sizeof(unsigned long) - 1)) {
+ pt_error_return(regs, EINVAL);
+ goto out;
+ }
+ res = read_long(child, addr, &tmp);
+ }
+ if (res < 0) {
+ pt_error_return(regs, -res);
+ goto out;
+ }
+ pt_os_succ_return(regs, tmp, (long *) data);
+ goto out;
+ }
+
+ case PTRACE_PEEKUSR:
+#if 0
+ read_sunos_user(regs, addr, child, (long *) data);
+#endif
+ goto out;
+
+ case PTRACE_POKEUSR:
+#if 0
+ write_sunos_user(regs, addr, child);
+#endif
+ goto out;
+
+ case PTRACE_POKETEXT: /* write the word at location addr. */
+ case PTRACE_POKEDATA: {
+ int res;
+
+ /* Non-word alignment _not_ allowed on Sparc. */
+ if (current->tss.flags & SPARC_FLAG_32BIT) {
+ if(addr & (sizeof(unsigned int) - 1)) {
+ pt_error_return(regs, EINVAL);
+ goto out;
+ }
+ res = write_int(child, addr, data);
+ } else {
+ if(addr & (sizeof(unsigned long) - 1)) {
+ pt_error_return(regs, EINVAL);
+ goto out;
+ }
+ res = write_long(child, addr, data);
+ }
+ if(res < 0)
+ pt_error_return(regs, -res);
+ else
+ pt_succ_return(regs, res);
+ goto out;
+ }
+
+ case PTRACE_GETREGS:
+ if (current->tss.flags & SPARC_FLAG_32BIT) {
+ struct pt_regs32 *pregs = (struct pt_regs32 *) addr;
+ struct pt_regs *cregs = child->tss.kregs;
+ 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;
+ }
+ 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;
+ }
+ 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;
+ } else {
+ struct pt_regs *pregs = (struct pt_regs *) addr;
+ struct pt_regs *cregs = child->tss.kregs;
+ int rval;
+
+ if (__put_user(cregs->tstate, (&pregs->tstate)) ||
+ __put_user(cregs->tpc, (&pregs->tpc)) ||
+ __put_user(cregs->tnpc, (&pregs->tnpc)) ||
+ __put_user(cregs->y, (&pregs->y))) {
+ pt_error_return(regs, EFAULT);
+ goto out;
+ }
+ 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;
+ }
+ 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;
+ }
+
+ case PTRACE_SETREGS:
+ if (current->tss.flags & SPARC_FLAG_32BIT) {
+ struct pt_regs32 *pregs = (struct pt_regs32 *) addr;
+ struct pt_regs *cregs = child->tss.kregs;
+ 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;
+ }
+ cregs->tstate &= ~(TSTATE_ICC);
+ cregs->tstate |= psr_to_tstate_icc(psr);
+ if(!((pc | npc) & 3)) {
+ cregs->tpc = pc;
+ cregs->tpc = 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;
+ }
+ pt_succ_return(regs, 0);
+ goto out;
+ } else {
+ struct pt_regs *pregs = (struct pt_regs *) addr;
+ struct pt_regs *cregs = child->tss.kregs;
+ 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;
+ }
+ 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;
+ }
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+
+ case PTRACE_GETFPREGS:
+ if (current->tss.flags & SPARC_FLAG_32BIT) {
+ 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];
+ } *fps = (struct fps *) addr;
+
+ if (copy_to_user(&fps->regs[0], &child->tss.float_regs[0], (32 * sizeof(unsigned int))) ||
+ __put_user(child->tss.fsr, (&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;
+ }
+ pt_succ_return(regs, 0);
+ goto out;
+ } else {
+ struct fps {
+ unsigned int regs[64];
+ unsigned long fsr;
+ } *fps = (struct fps *) addr;
+
+ if (copy_to_user(&fps->regs[0], &child->tss.float_regs[0], (64 * sizeof(unsigned int))) ||
+ __put_user(child->tss.fsr, (&fps->fsr))) {
+ pt_error_return(regs, EFAULT);
+ goto out;
+ }
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+
+ case PTRACE_SETFPREGS:
+ if (current->tss.flags & SPARC_FLAG_32BIT) {
+ 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];
+ } *fps = (struct fps *) addr;
+ unsigned fsr;
+
+ if (copy_from_user(&child->tss.float_regs[0], &fps->regs[0], (32 * sizeof(unsigned int))) ||
+ __get_user(fsr, (&fps->fsr))) {
+ pt_error_return(regs, EFAULT);
+ goto out;
+ }
+ child->tss.fsr &= 0xffffffff00000000UL;
+ child->tss.fsr |= fsr;
+ pt_succ_return(regs, 0);
+ goto out;
+ } else {
+ struct fps {
+ unsigned int regs[64];
+ unsigned long fsr;
+ } *fps = (struct fps *) addr;
+
+ if (copy_from_user(&child->tss.float_regs[0], &fps->regs[0], (64 * sizeof(unsigned int))) ||
+ __get_user(child->tss.fsr, (&fps->fsr))) {
+ pt_error_return(regs, EFAULT);
+ goto out;
+ }
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+
+ case PTRACE_READTEXT:
+ case PTRACE_READDATA: {
+ unsigned char *dest = (unsigned char *) addr2;
+ unsigned long src = addr;
+ int len = data, curlen;
+ struct vm_area_struct *vma;
+ pte_t *pgtable;
+ unsigned long page;
+
+ while(len) {
+ vma = find_extend_vma(child, src);
+ if (!vma) {
+ pt_error_return(regs, EIO);
+ goto out;
+ }
+ pgtable = get_page (child, vma, src, 0);
+ if (src & ~PAGE_MASK) {
+ curlen = PAGE_SIZE - (src & ~PAGE_MASK);
+ if (curlen > len) curlen = len;
+ } else if (len > PAGE_SIZE)
+ curlen = PAGE_SIZE;
+ else
+ curlen = len;
+ if (pgtable && MAP_NR(page = pte_page(*pgtable)) < max_mapnr) {
+ if (copy_to_user (dest, ((char *)page) + (src & ~PAGE_MASK), curlen)) {
+ flush_page_to_ram(page);
+ pt_error_return(regs, EFAULT);
+ goto out;
+ }
+ flush_page_to_ram(page);
+ } else {
+ if (clear_user (dest, curlen)) {
+ pt_error_return(regs, EFAULT);
+ goto out;
+ }
+ }
+ src += curlen;
+ dest += curlen;
+ len -= curlen;
+ }
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+
+ case PTRACE_WRITETEXT:
+ case PTRACE_WRITEDATA: {
+ unsigned char *src = (unsigned char *) addr2;
+ unsigned long dest = addr;
+ int len = data, curlen;
+ struct vm_area_struct *vma;
+ pte_t *pgtable;
+ unsigned long page;
+
+ while(len) {
+ vma = find_extend_vma(child, dest);
+ if (!vma) {
+ pt_error_return(regs, EIO);
+ goto out;
+ }
+ pgtable = get_page (child, vma, dest, 1);
+ if (dest & ~PAGE_MASK) {
+ curlen = PAGE_SIZE - (dest & ~PAGE_MASK);
+ if (curlen > len) curlen = len;
+ } else if (len > PAGE_SIZE)
+ curlen = PAGE_SIZE;
+ else
+ curlen = len;
+ if (pgtable && MAP_NR(page = pte_page(*pgtable)) < max_mapnr) {
+ flush_cache_page(vma, dest);
+ if (copy_from_user (((char *)page) + (dest & ~PAGE_MASK), src, curlen)) {
+ flush_page_to_ram(page);
+ set_pte(pgtable, pte_mkdirty(mk_pte(page, vma->vm_page_prot)));
+ flush_tlb_page(vma, dest);
+ pt_error_return(regs, EFAULT);
+ goto out;
+ }
+ flush_page_to_ram(page);
+ set_pte(pgtable, pte_mkdirty(mk_pte(page, vma->vm_page_prot)));
+ flush_tlb_page(vma, dest);
+ }
+ src += curlen;
+ dest += curlen;
+ len -= curlen;
+ }
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+
+ case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */
+ addr = 1;
+
+ case PTRACE_CONT: { /* restart after signal. */
+ if (data > NSIG) {
+ pt_error_return(regs, EIO);
+ goto out;
+ }
+ if (addr != 1) {
+ if (addr & 3) {
+ pt_error_return(regs, EINVAL);
+ goto out;
+ }
+#ifdef DEBUG_PTRACE
+ printk ("Original: %016lx %016lx\n", child->tss.kregs->tpc, child->tss.kregs->tnpc);
+ printk ("Continuing with %016lx %016lx\n", addr, addr+4);
+#endif
+ child->tss.kregs->tpc = addr;
+ child->tss.kregs->tnpc = addr + 4;
+ }
+
+ if (request == PTRACE_SYSCALL)
+ child->flags |= PF_TRACESYS;
+ else
+ child->flags &= ~PF_TRACESYS;
+
+ 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,
+ child->tss.kregs->tpc,
+ child->tss.kregs->tnpc);
+
+#endif
+ wake_up_process(child);
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+
+/*
+ * 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->state == TASK_ZOMBIE) { /* already dead */
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+ wake_up_process(child);
+ child->exit_code = SIGKILL;
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+
+ case PTRACE_SUNDETACH: { /* detach a process that was attached. */
+ if ((unsigned long) data > NSIG) {
+ pt_error_return(regs, EIO);
+ goto out;
+ }
+ child->flags &= ~(PF_PTRACED|PF_TRACESYS);
+ wake_up_process(child);
+ child->exit_code = data;
+ REMOVE_LINKS(child);
+ child->p_pptr = child->p_opptr;
+ SET_LINKS(child);
+ pt_succ_return(regs, 0);
+ goto out;
+ }
+
+ /* PTRACE_DUMPCORE unsupported... */
+
+ default:
+ pt_error_return(regs, EIO);
+ goto out;
+ }
+out:
+ unlock_kernel();
+}
+
+asmlinkage void syscall_trace(void)
+{
+#ifdef DEBUG_PTRACE
+ printk("%s [%d]: syscall_trace\n", current->comm, current->pid);
+#endif
+ if ((current->flags & (PF_PTRACED|PF_TRACESYS))
+ != (PF_PTRACED|PF_TRACESYS))
+ return;
+ current->exit_code = SIGTRAP;
+ current->state = TASK_STOPPED;
+ current->tss.flags ^= MAGIC_CONSTANT;
+ notify_parent(current);
+ schedule();
+ /*
+ * 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
+ */
+#ifdef DEBUG_PTRACE
+ printk("%s [%d]: syscall_trace exit= %x\n", current->comm,
+ current->pid, current->exit_code);
+#endif
+ if (current->exit_code) {
+ set_bit(current->exit_code + 31, &current->signal);
+ }
+ current->exit_code = 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-20 17:53:21 +0000