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-rw-r--r--arch/metag/kernel/ptrace.c427
1 files changed, 0 insertions, 427 deletions
diff --git a/arch/metag/kernel/ptrace.c b/arch/metag/kernel/ptrace.c
deleted file mode 100644
index e615603..0000000
--- a/arch/metag/kernel/ptrace.c
+++ /dev/null
@@ -1,427 +0,0 @@
-/*
- * Copyright (C) 2005-2012 Imagination Technologies Ltd.
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License. See the file COPYING in the main directory of
- * this archive for more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/regset.h>
-#include <linux/tracehook.h>
-#include <linux/elf.h>
-#include <linux/uaccess.h>
-#include <linux/sched/task_stack.h>
-
-#include <trace/syscall.h>
-
-#define CREATE_TRACE_POINTS
-#include <trace/events/syscalls.h>
-
-/*
- * user_regset definitions.
- */
-
-static unsigned long user_txstatus(const struct pt_regs *regs)
-{
- unsigned long data = (unsigned long)regs->ctx.Flags;
-
- if (regs->ctx.SaveMask & TBICTX_CBUF_BIT)
- data |= USER_GP_REGS_STATUS_CATCH_BIT;
-
- return data;
-}
-
-int metag_gp_regs_copyout(const struct pt_regs *regs,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- const void *ptr;
- unsigned long data;
- int ret;
-
- /* D{0-1}.{0-7} */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- regs->ctx.DX, 0, 4*16);
- if (ret)
- goto out;
- /* A{0-1}.{0-1} */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- regs->ctx.AX, 4*16, 4*20);
- if (ret)
- goto out;
- /* A{0-1}.2 */
- if (regs->ctx.SaveMask & TBICTX_XEXT_BIT)
- ptr = regs->ctx.Ext.Ctx.pExt;
- else
- ptr = &regs->ctx.Ext.AX2;
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- ptr, 4*20, 4*22);
- if (ret)
- goto out;
- /* A{0-1}.3 */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &regs->ctx.AX3, 4*22, 4*24);
- if (ret)
- goto out;
- /* PC */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &regs->ctx.CurrPC, 4*24, 4*25);
- if (ret)
- goto out;
- /* TXSTATUS */
- data = user_txstatus(regs);
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &data, 4*25, 4*26);
- if (ret)
- goto out;
- /* TXRPT, TXBPOBITS, TXMODE */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &regs->ctx.CurrRPT, 4*26, 4*29);
- if (ret)
- goto out;
- /* Padding */
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 4*29, 4*30);
-out:
- return ret;
-}
-
-int metag_gp_regs_copyin(struct pt_regs *regs,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- void *ptr;
- unsigned long data;
- int ret;
-
- /* D{0-1}.{0-7} */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- regs->ctx.DX, 0, 4*16);
- if (ret)
- goto out;
- /* A{0-1}.{0-1} */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- regs->ctx.AX, 4*16, 4*20);
- if (ret)
- goto out;
- /* A{0-1}.2 */
- if (regs->ctx.SaveMask & TBICTX_XEXT_BIT)
- ptr = regs->ctx.Ext.Ctx.pExt;
- else
- ptr = &regs->ctx.Ext.AX2;
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- ptr, 4*20, 4*22);
- if (ret)
- goto out;
- /* A{0-1}.3 */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &regs->ctx.AX3, 4*22, 4*24);
- if (ret)
- goto out;
- /* PC */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &regs->ctx.CurrPC, 4*24, 4*25);
- if (ret)
- goto out;
- /* TXSTATUS */
- data = user_txstatus(regs);
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &data, 4*25, 4*26);
- if (ret)
- goto out;
- regs->ctx.Flags = data & 0xffff;
- if (data & USER_GP_REGS_STATUS_CATCH_BIT)
- regs->ctx.SaveMask |= TBICTX_XCBF_BIT | TBICTX_CBUF_BIT;
- else
- regs->ctx.SaveMask &= ~TBICTX_CBUF_BIT;
- /* TXRPT, TXBPOBITS, TXMODE */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &regs->ctx.CurrRPT, 4*26, 4*29);
-out:
- return ret;
-}
-
-static int metag_gp_regs_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);
- return metag_gp_regs_copyout(regs, pos, count, kbuf, ubuf);
-}
-
-static int metag_gp_regs_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);
- return metag_gp_regs_copyin(regs, pos, count, kbuf, ubuf);
-}
-
-int metag_cb_regs_copyout(const struct pt_regs *regs,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- int ret;
-
- /* TXCATCH{0-3} */
- if (regs->ctx.SaveMask & TBICTX_XCBF_BIT)
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- regs->extcb0, 0, 4*4);
- else
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 0, 4*4);
- return ret;
-}
-
-int metag_cb_regs_copyin(struct pt_regs *regs,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret;
-
- /* TXCATCH{0-3} */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- regs->extcb0, 0, 4*4);
- return ret;
-}
-
-static int metag_cb_regs_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);
- return metag_cb_regs_copyout(regs, pos, count, kbuf, ubuf);
-}
-
-static int metag_cb_regs_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);
- return metag_cb_regs_copyin(regs, pos, count, kbuf, ubuf);
-}
-
-int metag_rp_state_copyout(const struct pt_regs *regs,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- unsigned long mask;
- u64 *ptr;
- int ret, i;
-
- /* Empty read pipeline */
- if (!(regs->ctx.SaveMask & TBICTX_CBRP_BIT)) {
- ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- 0, 4*13);
- goto out;
- }
-
- mask = (regs->ctx.CurrDIVTIME & TXDIVTIME_RPMASK_BITS) >>
- TXDIVTIME_RPMASK_S;
-
- /* Read pipeline entries */
- ptr = (void *)&regs->extcb0[1];
- for (i = 0; i < 6; ++i, ++ptr) {
- if (mask & (1 << i))
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- ptr, 8*i, 8*(i + 1));
- else
- ret = user_regset_copyout_zero(&pos, &count, &kbuf,
- &ubuf, 8*i, 8*(i + 1));
- if (ret)
- goto out;
- }
- /* Mask of entries */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &mask, 4*12, 4*13);
-out:
- return ret;
-}
-
-int metag_rp_state_copyin(struct pt_regs *regs,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- struct user_rp_state rp;
- unsigned long long *ptr;
- int ret, i;
-
- if (count < 4*13)
- return -EINVAL;
- /* Read the entire pipeline before making any changes */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &rp, 0, 4*13);
- if (ret)
- goto out;
-
- /* Write pipeline entries */
- ptr = (void *)&regs->extcb0[1];
- for (i = 0; i < 6; ++i, ++ptr)
- if (rp.mask & (1 << i))
- *ptr = rp.entries[i];
-
- /* Update RPMask in TXDIVTIME */
- regs->ctx.CurrDIVTIME &= ~TXDIVTIME_RPMASK_BITS;
- regs->ctx.CurrDIVTIME |= (rp.mask << TXDIVTIME_RPMASK_S)
- & TXDIVTIME_RPMASK_BITS;
-
- /* Set/clear flags to indicate catch/read pipeline state */
- if (rp.mask)
- regs->ctx.SaveMask |= TBICTX_XCBF_BIT | TBICTX_CBRP_BIT;
- else
- regs->ctx.SaveMask &= ~TBICTX_CBRP_BIT;
-out:
- return ret;
-}
-
-static int metag_rp_state_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);
- return metag_rp_state_copyout(regs, pos, count, kbuf, ubuf);
-}
-
-static int metag_rp_state_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);
- return metag_rp_state_copyin(regs, pos, count, kbuf, ubuf);
-}
-
-static int metag_tls_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- void __user *tls = target->thread.tls_ptr;
- return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &tls, 0, -1);
-}
-
-static int metag_tls_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- int ret;
- void __user *tls = target->thread.tls_ptr;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1);
- if (ret)
- return ret;
-
- target->thread.tls_ptr = tls;
- return ret;
-}
-
-enum metag_regset {
- REGSET_GENERAL,
- REGSET_CBUF,
- REGSET_READPIPE,
- REGSET_TLS,
-};
-
-static const struct user_regset metag_regsets[] = {
- [REGSET_GENERAL] = {
- .core_note_type = NT_PRSTATUS,
- .n = ELF_NGREG,
- .size = sizeof(long),
- .align = sizeof(long long),
- .get = metag_gp_regs_get,
- .set = metag_gp_regs_set,
- },
- [REGSET_CBUF] = {
- .core_note_type = NT_METAG_CBUF,
- .n = sizeof(struct user_cb_regs) / sizeof(long),
- .size = sizeof(long),
- .align = sizeof(long long),
- .get = metag_cb_regs_get,
- .set = metag_cb_regs_set,
- },
- [REGSET_READPIPE] = {
- .core_note_type = NT_METAG_RPIPE,
- .n = sizeof(struct user_rp_state) / sizeof(long),
- .size = sizeof(long),
- .align = sizeof(long long),
- .get = metag_rp_state_get,
- .set = metag_rp_state_set,
- },
- [REGSET_TLS] = {
- .core_note_type = NT_METAG_TLS,
- .n = 1,
- .size = sizeof(void *),
- .align = sizeof(void *),
- .get = metag_tls_get,
- .set = metag_tls_set,
- },
-};
-
-static const struct user_regset_view user_metag_view = {
- .name = "metag",
- .e_machine = EM_METAG,
- .regsets = metag_regsets,
- .n = ARRAY_SIZE(metag_regsets)
-};
-
-const struct user_regset_view *task_user_regset_view(struct task_struct *task)
-{
- return &user_metag_view;
-}
-
-/*
- * 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.. */
-}
-
-long arch_ptrace(struct task_struct *child, long request, unsigned long addr,
- unsigned long data)
-{
- int ret;
-
- switch (request) {
- default:
- ret = ptrace_request(child, request, addr, data);
- break;
- }
-
- return ret;
-}
-
-int syscall_trace_enter(struct pt_regs *regs)
-{
- int ret = 0;
-
- if (test_thread_flag(TIF_SYSCALL_TRACE))
- ret = tracehook_report_syscall_entry(regs);
-
- if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_enter(regs, regs->ctx.DX[0].U1);
-
- return ret ? -1 : regs->ctx.DX[0].U1;
-}
-
-void syscall_trace_leave(struct pt_regs *regs)
-{
- if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_exit(regs, regs->ctx.DX[0].U1);
-
- if (test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, 0);
-}
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