diff options
-rw-r--r-- | arch/x86/ia32/ptrace32.c | 190 |
1 files changed, 107 insertions, 83 deletions
diff --git a/arch/x86/ia32/ptrace32.c b/arch/x86/ia32/ptrace32.c index 4a233ad6269..9d754b64020 100644 --- a/arch/x86/ia32/ptrace32.c +++ b/arch/x86/ia32/ptrace32.c @@ -1,13 +1,13 @@ -/* +/* * 32bit ptrace for x86-64. * * Copyright 2001,2002 Andi Kleen, SuSE Labs. - * Some parts copied from arch/i386/kernel/ptrace.c. See that file for earlier + * Some parts copied from arch/i386/kernel/ptrace.c. See that file for earlier * copyright. - * - * This allows to access 64bit processes too; but there is no way to see the extended - * register contents. - */ + * + * This allows to access 64bit processes too; but there is no way to + * see the extended register contents. + */ #include <linux/kernel.h> #include <linux/stddef.h> @@ -35,8 +35,9 @@ */ #define FLAG_MASK 0x54dd5UL -#define R32(l,q) \ - case offsetof(struct user32, regs.l): stack[offsetof(struct pt_regs, q)/8] = val; break +#define R32(l,q) \ + case offsetof(struct user32, regs.l): \ + stack[offsetof(struct pt_regs, q) / 8] = val; break static int putreg32(struct task_struct *child, unsigned regno, u32 val) { @@ -45,30 +46,35 @@ static int putreg32(struct task_struct *child, unsigned regno, u32 val) switch (regno) { case offsetof(struct user32, regs.fs): - if (val && (val & 3) != 3) return -EIO; + if (val && (val & 3) != 3) + return -EIO; child->thread.fsindex = val & 0xffff; break; case offsetof(struct user32, regs.gs): - if (val && (val & 3) != 3) return -EIO; + if (val && (val & 3) != 3) + return -EIO; child->thread.gsindex = val & 0xffff; break; case offsetof(struct user32, regs.ds): - if (val && (val & 3) != 3) return -EIO; + if (val && (val & 3) != 3) + return -EIO; child->thread.ds = val & 0xffff; break; case offsetof(struct user32, regs.es): child->thread.es = val & 0xffff; break; - case offsetof(struct user32, regs.ss): - if ((val & 3) != 3) return -EIO; - stack[offsetof(struct pt_regs, ss)/8] = val & 0xffff; + case offsetof(struct user32, regs.ss): + if ((val & 3) != 3) + return -EIO; + stack[offsetof(struct pt_regs, ss)/8] = val & 0xffff; break; - case offsetof(struct user32, regs.cs): - if ((val & 3) != 3) return -EIO; + case offsetof(struct user32, regs.cs): + if ((val & 3) != 3) + return -EIO; stack[offsetof(struct pt_regs, cs)/8] = val & 0xffff; break; - R32(ebx, rbx); + R32(ebx, rbx); R32(ecx, rcx); R32(edx, rdx); R32(edi, rdi); @@ -81,12 +87,13 @@ static int putreg32(struct task_struct *child, unsigned regno, u32 val) case offsetof(struct user32, regs.eflags): { __u64 *flags = &stack[offsetof(struct pt_regs, eflags)/8]; + val &= FLAG_MASK; *flags = val | (*flags & ~FLAG_MASK); break; } - case offsetof(struct user32, u_debugreg[4]): + case offsetof(struct user32, u_debugreg[4]): case offsetof(struct user32, u_debugreg[5]): return -EIO; @@ -108,36 +115,40 @@ static int putreg32(struct task_struct *child, unsigned regno, u32 val) case offsetof(struct user32, u_debugreg[6]): child->thread.debugreg6 = val; - break; + break; case offsetof(struct user32, u_debugreg[7]): val &= ~DR_CONTROL_RESERVED; /* See arch/i386/kernel/ptrace.c for an explanation of * this awkward check.*/ - for(i=0; i<4; i++) + for (i = 0; i < 4; i++) if ((0x5454 >> ((val >> (16 + 4*i)) & 0xf)) & 1) return -EIO; - child->thread.debugreg7 = val; + child->thread.debugreg7 = val; if (val) set_tsk_thread_flag(child, TIF_DEBUG); else clear_tsk_thread_flag(child, TIF_DEBUG); - break; - + break; + default: if (regno > sizeof(struct user32) || (regno & 3)) return -EIO; - - /* Other dummy fields in the virtual user structure are ignored */ - break; + + /* + * Other dummy fields in the virtual user structure + * are ignored + */ + break; } return 0; } #undef R32 -#define R32(l,q) \ - case offsetof(struct user32, regs.l): *val = stack[offsetof(struct pt_regs, q)/8]; break +#define R32(l,q) \ + case offsetof(struct user32, regs.l): \ + *val = stack[offsetof(struct pt_regs, q)/8]; break static int getreg32(struct task_struct *child, unsigned regno, u32 *val) { @@ -145,7 +156,7 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val) switch (regno) { case offsetof(struct user32, regs.fs): - *val = child->thread.fsindex; + *val = child->thread.fsindex; break; case offsetof(struct user32, regs.gs): *val = child->thread.gsindex; @@ -159,7 +170,7 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val) R32(cs, cs); R32(ss, ss); - R32(ebx, rbx); + R32(ebx, rbx); R32(ecx, rcx); R32(edx, rdx); R32(edi, rdi); @@ -171,32 +182,35 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val) R32(eflags, eflags); R32(esp, rsp); - case offsetof(struct user32, u_debugreg[0]): - *val = child->thread.debugreg0; - break; - case offsetof(struct user32, u_debugreg[1]): - *val = child->thread.debugreg1; - break; - case offsetof(struct user32, u_debugreg[2]): - *val = child->thread.debugreg2; - break; - case offsetof(struct user32, u_debugreg[3]): - *val = child->thread.debugreg3; - break; - case offsetof(struct user32, u_debugreg[6]): - *val = child->thread.debugreg6; - break; - case offsetof(struct user32, u_debugreg[7]): - *val = child->thread.debugreg7; - break; - + case offsetof(struct user32, u_debugreg[0]): + *val = child->thread.debugreg0; + break; + case offsetof(struct user32, u_debugreg[1]): + *val = child->thread.debugreg1; + break; + case offsetof(struct user32, u_debugreg[2]): + *val = child->thread.debugreg2; + break; + case offsetof(struct user32, u_debugreg[3]): + *val = child->thread.debugreg3; + break; + case offsetof(struct user32, u_debugreg[6]): + *val = child->thread.debugreg6; + break; + case offsetof(struct user32, u_debugreg[7]): + *val = child->thread.debugreg7; + break; + default: if (regno > sizeof(struct user32) || (regno & 3)) return -EIO; - /* Other dummy fields in the virtual user structure are ignored */ + /* + * Other dummy fields in the virtual user structure + * are ignored + */ *val = 0; - break; + break; } return 0; } @@ -205,10 +219,11 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val) static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data) { - int ret; - compat_siginfo_t __user *si32 = compat_ptr(data); - siginfo_t ssi; siginfo_t __user *si = compat_alloc_user_space(sizeof(siginfo_t)); + compat_siginfo_t __user *si32 = compat_ptr(data); + siginfo_t ssi; + int ret; + if (request == PTRACE_SETSIGINFO) { memset(&ssi, 0, sizeof(siginfo_t)); ret = copy_siginfo_from_user32(&ssi, si32); @@ -231,12 +246,12 @@ static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data) asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) { struct task_struct *child; - struct pt_regs *childregs; + struct pt_regs *childregs; void __user *datap = compat_ptr(data); int ret; __u32 val; - switch (request) { + switch (request) { case PTRACE_TRACEME: case PTRACE_ATTACH: case PTRACE_KILL: @@ -248,7 +263,7 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) case PTRACE_SETOPTIONS: case PTRACE_SET_THREAD_AREA: case PTRACE_GET_THREAD_AREA: - return sys_ptrace(request, pid, addr, data); + return sys_ptrace(request, pid, addr, data); default: return -EINVAL; @@ -257,7 +272,7 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) case PTRACE_PEEKDATA: case PTRACE_POKEDATA: case PTRACE_POKETEXT: - case PTRACE_POKEUSR: + case PTRACE_POKEUSR: case PTRACE_PEEKUSR: case PTRACE_GETREGS: case PTRACE_SETREGS: @@ -287,17 +302,19 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) case PTRACE_PEEKDATA: case PTRACE_PEEKTEXT: ret = 0; - if (access_process_vm(child, addr, &val, sizeof(u32), 0)!=sizeof(u32)) + if (access_process_vm(child, addr, &val, sizeof(u32), 0) != + sizeof(u32)) ret = -EIO; else - ret = put_user(val, (unsigned int __user *)datap); - break; + ret = put_user(val, (unsigned int __user *)datap); + break; case PTRACE_POKEDATA: case PTRACE_POKETEXT: ret = 0; - if (access_process_vm(child, addr, &data, sizeof(u32), 1)!=sizeof(u32)) - ret = -EIO; + if (access_process_vm(child, addr, &data, sizeof(u32), 1) != + sizeof(u32)) + ret = -EIO; break; case PTRACE_PEEKUSR: @@ -312,14 +329,15 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) case PTRACE_GETREGS: { /* Get all gp regs from the child. */ int i; - if (!access_ok(VERIFY_WRITE, datap, 16*4)) { + + if (!access_ok(VERIFY_WRITE, datap, 16*4)) { ret = -EIO; break; } ret = 0; - for ( i = 0; i <= 16*4 ; i += sizeof(__u32) ) { + for (i = 0; i <= 16*4; i += sizeof(__u32)) { getreg32(child, i, &val); - ret |= __put_user(val,(u32 __user *)datap); + ret |= __put_user(val, (u32 __user *)datap); datap += sizeof(u32); } break; @@ -328,12 +346,13 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) case PTRACE_SETREGS: { /* Set all gp regs in the child. */ unsigned long tmp; int i; - if (!access_ok(VERIFY_READ, datap, 16*4)) { + + if (!access_ok(VERIFY_READ, datap, 16*4)) { ret = -EIO; break; } - ret = 0; - for ( i = 0; i <= 16*4; i += sizeof(u32) ) { + ret = 0; + for (i = 0; i <= 16*4; i += sizeof(u32)) { ret |= __get_user(tmp, (u32 __user *)datap); putreg32(child, i, tmp); datap += sizeof(u32); @@ -342,17 +361,17 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) } case PTRACE_GETFPREGS: - ret = -EIO; - if (!access_ok(VERIFY_READ, compat_ptr(data), + ret = -EIO; + if (!access_ok(VERIFY_READ, compat_ptr(data), sizeof(struct user_i387_struct))) break; save_i387_ia32(child, datap, childregs, 1); - ret = 0; + ret = 0; break; case PTRACE_SETFPREGS: ret = -EIO; - if (!access_ok(VERIFY_WRITE, datap, + if (!access_ok(VERIFY_WRITE, datap, sizeof(struct user_i387_struct))) break; ret = 0; @@ -360,9 +379,10 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) restore_i387_ia32(child, datap, 1); break; - case PTRACE_GETFPXREGS: { + case PTRACE_GETFPXREGS: { struct user32_fxsr_struct __user *u = datap; - init_fpu(child); + + init_fpu(child); ret = -EIO; if (!access_ok(VERIFY_WRITE, u, sizeof(*u))) break; @@ -370,27 +390,31 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) if (__copy_to_user(u, &child->thread.i387.fxsave, sizeof(*u))) break; ret = __put_user(childregs->cs, &u->fcs); - ret |= __put_user(child->thread.ds, &u->fos); - break; - } - case PTRACE_SETFPXREGS: { + ret |= __put_user(child->thread.ds, &u->fos); + break; + } + case PTRACE_SETFPXREGS: { struct user32_fxsr_struct __user *u = datap; + unlazy_fpu(child); ret = -EIO; if (!access_ok(VERIFY_READ, u, sizeof(*u))) break; - /* no checking to be bug-to-bug compatible with i386. */ - /* but silence warning */ + /* + * no checking to be bug-to-bug compatible with i386. + * but silence warning + */ if (__copy_from_user(&child->thread.i387.fxsave, u, sizeof(*u))) ; set_stopped_child_used_math(child); child->thread.i387.fxsave.mxcsr &= mxcsr_feature_mask; - ret = 0; + ret = 0; break; } case PTRACE_GETEVENTMSG: - ret = put_user(child->ptrace_message,(unsigned int __user *)compat_ptr(data)); + ret = put_user(child->ptrace_message, + (unsigned int __user *)compat_ptr(data)); break; default: |