| /* |
| * 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. |
| * |
| * Copyright (C) 1992 Ross Biro |
| * Copyright (C) Linus Torvalds |
| * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle |
| * Copyright (C) 1996 David S. Miller |
| * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com |
| * Copyright (C) 1999 MIPS Technologies, Inc. |
| * Copyright (C) 2000 Ulf Carlsson |
| * |
| * At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit |
| * binaries. |
| */ |
| #include <linux/compiler.h> |
| #include <linux/compat.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/mm.h> |
| #include <linux/errno.h> |
| #include <linux/ptrace.h> |
| #include <linux/smp.h> |
| #include <linux/security.h> |
| |
| #include <asm/cpu.h> |
| #include <asm/dsp.h> |
| #include <asm/fpu.h> |
| #include <asm/mipsregs.h> |
| #include <asm/mipsmtregs.h> |
| #include <asm/pgtable.h> |
| #include <asm/page.h> |
| #include <asm/reg.h> |
| #include <asm/uaccess.h> |
| #include <asm/bootinfo.h> |
| |
| /* |
| * Tracing a 32-bit process with a 64-bit strace and vice versa will not |
| * work. I don't know how to fix this. |
| */ |
| long compat_arch_ptrace(struct task_struct *child, compat_long_t request, |
| compat_ulong_t caddr, compat_ulong_t cdata) |
| { |
| int addr = caddr; |
| int data = cdata; |
| int ret; |
| |
| switch (request) { |
| |
| /* |
| * Read 4 bytes of the other process' storage |
| * data is a pointer specifying where the user wants the |
| * 4 bytes copied into |
| * addr is a pointer in the user's storage that contains an 8 byte |
| * address in the other process of the 4 bytes that is to be read |
| * (this is run in a 32-bit process looking at a 64-bit process) |
| * when I and D space are separate, these will need to be fixed. |
| */ |
| case PTRACE_PEEKTEXT_3264: |
| case PTRACE_PEEKDATA_3264: { |
| u32 tmp; |
| int copied; |
| u32 __user * addrOthers; |
| |
| ret = -EIO; |
| |
| /* Get the addr in the other process that we want to read */ |
| if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0) |
| break; |
| |
| copied = ptrace_access_vm(child, (u64)addrOthers, &tmp, |
| sizeof(tmp), FOLL_FORCE); |
| if (copied != sizeof(tmp)) |
| break; |
| ret = put_user(tmp, (u32 __user *) (unsigned long) data); |
| break; |
| } |
| |
| /* Read the word at location addr in the USER area. */ |
| case PTRACE_PEEKUSR: { |
| struct pt_regs *regs; |
| union fpureg *fregs; |
| unsigned int tmp; |
| |
| regs = task_pt_regs(child); |
| ret = 0; /* Default return value. */ |
| |
| switch (addr) { |
| case 0 ... 31: |
| tmp = regs->regs[addr]; |
| break; |
| case FPR_BASE ... FPR_BASE + 31: |
| if (!tsk_used_math(child)) { |
| /* FP not yet used */ |
| tmp = -1; |
| break; |
| } |
| fregs = get_fpu_regs(child); |
| if (test_thread_flag(TIF_32BIT_FPREGS)) { |
| /* |
| * The odd registers are actually the high |
| * order bits of the values stored in the even |
| * registers - unless we're using r2k_switch.S. |
| */ |
| tmp = get_fpr32(&fregs[(addr & ~1) - FPR_BASE], |
| addr & 1); |
| break; |
| } |
| tmp = get_fpr32(&fregs[addr - FPR_BASE], 0); |
| break; |
| case PC: |
| tmp = regs->cp0_epc; |
| break; |
| case CAUSE: |
| tmp = regs->cp0_cause; |
| break; |
| case BADVADDR: |
| tmp = regs->cp0_badvaddr; |
| break; |
| case MMHI: |
| tmp = regs->hi; |
| break; |
| case MMLO: |
| tmp = regs->lo; |
| break; |
| case FPC_CSR: |
| tmp = child->thread.fpu.fcr31; |
| break; |
| case FPC_EIR: |
| /* implementation / version register */ |
| tmp = boot_cpu_data.fpu_id; |
| break; |
| case DSP_BASE ... DSP_BASE + 5: { |
| dspreg_t *dregs; |
| |
| if (!cpu_has_dsp) { |
| tmp = 0; |
| ret = -EIO; |
| goto out; |
| } |
| dregs = __get_dsp_regs(child); |
| tmp = (unsigned long) (dregs[addr - DSP_BASE]); |
| break; |
| } |
| case DSP_CONTROL: |
| if (!cpu_has_dsp) { |
| tmp = 0; |
| ret = -EIO; |
| goto out; |
| } |
| tmp = child->thread.dsp.dspcontrol; |
| break; |
| default: |
| tmp = 0; |
| ret = -EIO; |
| goto out; |
| } |
| ret = put_user(tmp, (unsigned __user *) (unsigned long) data); |
| break; |
| } |
| |
| /* |
| * Write 4 bytes into the other process' storage |
| * data is the 4 bytes that the user wants written |
| * addr is a pointer in the user's storage that contains an |
| * 8 byte address in the other process where the 4 bytes |
| * that is to be written |
| * (this is run in a 32-bit process looking at a 64-bit process) |
| * when I and D space are separate, these will need to be fixed. |
| */ |
| case PTRACE_POKETEXT_3264: |
| case PTRACE_POKEDATA_3264: { |
| u32 __user * addrOthers; |
| |
| /* Get the addr in the other process that we want to write into */ |
| ret = -EIO; |
| if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0) |
| break; |
| ret = 0; |
| if (ptrace_access_vm(child, (u64)addrOthers, &data, |
| sizeof(data), |
| FOLL_FORCE | FOLL_WRITE) == sizeof(data)) |
| break; |
| ret = -EIO; |
| break; |
| } |
| |
| case PTRACE_POKEUSR: { |
| struct pt_regs *regs; |
| ret = 0; |
| regs = task_pt_regs(child); |
| |
| switch (addr) { |
| case 0 ... 31: |
| regs->regs[addr] = data; |
| break; |
| case FPR_BASE ... FPR_BASE + 31: { |
| union fpureg *fregs = get_fpu_regs(child); |
| |
| if (!tsk_used_math(child)) { |
| /* FP not yet used */ |
| memset(&child->thread.fpu, ~0, |
| sizeof(child->thread.fpu)); |
| child->thread.fpu.fcr31 = 0; |
| } |
| if (test_thread_flag(TIF_32BIT_FPREGS)) { |
| /* |
| * The odd registers are actually the high |
| * order bits of the values stored in the even |
| * registers - unless we're using r2k_switch.S. |
| */ |
| set_fpr32(&fregs[(addr & ~1) - FPR_BASE], |
| addr & 1, data); |
| break; |
| } |
| set_fpr64(&fregs[addr - FPR_BASE], 0, data); |
| break; |
| } |
| case PC: |
| regs->cp0_epc = data; |
| break; |
| case MMHI: |
| regs->hi = data; |
| break; |
| case MMLO: |
| regs->lo = data; |
| break; |
| case FPC_CSR: |
| child->thread.fpu.fcr31 = data; |
| break; |
| case DSP_BASE ... DSP_BASE + 5: { |
| dspreg_t *dregs; |
| |
| if (!cpu_has_dsp) { |
| ret = -EIO; |
| break; |
| } |
| |
| dregs = __get_dsp_regs(child); |
| dregs[addr - DSP_BASE] = data; |
| break; |
| } |
| case DSP_CONTROL: |
| if (!cpu_has_dsp) { |
| ret = -EIO; |
| break; |
| } |
| child->thread.dsp.dspcontrol = data; |
| break; |
| default: |
| /* The rest are not allowed. */ |
| ret = -EIO; |
| break; |
| } |
| break; |
| } |
| |
| case PTRACE_GETREGS: |
| ret = ptrace_getregs(child, |
| (struct user_pt_regs __user *) (__u64) data); |
| break; |
| |
| case PTRACE_SETREGS: |
| ret = ptrace_setregs(child, |
| (struct user_pt_regs __user *) (__u64) data); |
| break; |
| |
| case PTRACE_GETFPREGS: |
| ret = ptrace_getfpregs(child, (__u32 __user *) (__u64) data); |
| break; |
| |
| case PTRACE_SETFPREGS: |
| ret = ptrace_setfpregs(child, (__u32 __user *) (__u64) data); |
| break; |
| |
| case PTRACE_GET_THREAD_AREA: |
| ret = put_user(task_thread_info(child)->tp_value, |
| (unsigned int __user *) (unsigned long) data); |
| break; |
| |
| case PTRACE_GET_THREAD_AREA_3264: |
| ret = put_user(task_thread_info(child)->tp_value, |
| (unsigned long __user *) (unsigned long) data); |
| break; |
| |
| case PTRACE_GET_WATCH_REGS: |
| ret = ptrace_get_watch_regs(child, |
| (struct pt_watch_regs __user *) (unsigned long) addr); |
| break; |
| |
| case PTRACE_SET_WATCH_REGS: |
| ret = ptrace_set_watch_regs(child, |
| (struct pt_watch_regs __user *) (unsigned long) addr); |
| break; |
| |
| default: |
| ret = compat_ptrace_request(child, request, addr, data); |
| break; |
| } |
| out: |
| return ret; |
| } |