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Diffstat (limited to 'arch/x86/ia32/ptrace32.c')
-rw-r--r--arch/x86/ia32/ptrace32.c190
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:
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-23 09:06:30 +0000