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Diffstat (limited to 'arch/um/sys-i386/ptrace.c')
-rw-r--r--arch/um/sys-i386/ptrace.c109
1 files changed, 47 insertions, 62 deletions
diff --git a/arch/um/sys-i386/ptrace.c b/arch/um/sys-i386/ptrace.c
index dcf0c6b310c8..178f894384f4 100644
--- a/arch/um/sys-i386/ptrace.c
+++ b/arch/um/sys-i386/ptrace.c
@@ -1,18 +1,11 @@
-/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include <linux/compiler.h>
-#include "linux/sched.h"
#include "linux/mm.h"
-#include "asm/elf.h"
-#include "asm/ptrace.h"
+#include "linux/sched.h"
#include "asm/uaccess.h"
-#include "asm/unistd.h"
-#include "sysdep/ptrace.h"
-#include "sysdep/sigcontext.h"
-#include "sysdep/sc.h"
extern int arch_switch_tls(struct task_struct *from, struct task_struct *to);
@@ -23,7 +16,8 @@ void arch_switch_to(struct task_struct *from, struct task_struct *to)
return;
if (err != -EINVAL)
- printk(KERN_WARNING "arch_switch_tls failed, errno %d, not EINVAL\n", -err);
+ printk(KERN_WARNING "arch_switch_tls failed, errno %d, "
+ "not EINVAL\n", -err);
else
printk(KERN_WARNING "arch_switch_tls failed, errno = EINVAL\n");
}
@@ -34,21 +28,21 @@ int is_syscall(unsigned long addr)
int n;
n = copy_from_user(&instr, (void __user *) addr, sizeof(instr));
- if(n){
+ if (n) {
/* access_process_vm() grants access to vsyscall and stub,
* while copy_from_user doesn't. Maybe access_process_vm is
* slow, but that doesn't matter, since it will be called only
* in case of singlestepping, if copy_from_user failed.
*/
n = access_process_vm(current, addr, &instr, sizeof(instr), 0);
- if(n != sizeof(instr)) {
- printk("is_syscall : failed to read instruction from "
- "0x%lx\n", addr);
- return(1);
+ if (n != sizeof(instr)) {
+ printk(KERN_ERR "is_syscall : failed to read "
+ "instruction from 0x%lx\n", addr);
+ return 1;
}
}
/* int 0x80 or sysenter */
- return((instr == 0x80cd) || (instr == 0x340f));
+ return (instr == 0x80cd) || (instr == 0x340f);
}
/* determines which flags the user has access to. */
@@ -92,21 +86,21 @@ int putreg(struct task_struct *child, int regno, unsigned long value)
int poke_user(struct task_struct *child, long addr, long data)
{
- if ((addr & 3) || addr < 0)
- return -EIO;
-
- if (addr < MAX_REG_OFFSET)
- return putreg(child, addr, data);
-
- else if((addr >= offsetof(struct user, u_debugreg[0])) &&
- (addr <= offsetof(struct user, u_debugreg[7]))){
- addr -= offsetof(struct user, u_debugreg[0]);
- addr = addr >> 2;
- if((addr == 4) || (addr == 5)) return -EIO;
- child->thread.arch.debugregs[addr] = data;
- return 0;
- }
- return -EIO;
+ if ((addr & 3) || addr < 0)
+ return -EIO;
+
+ if (addr < MAX_REG_OFFSET)
+ return putreg(child, addr, data);
+ else if ((addr >= offsetof(struct user, u_debugreg[0])) &&
+ (addr <= offsetof(struct user, u_debugreg[7]))) {
+ addr -= offsetof(struct user, u_debugreg[0]);
+ addr = addr >> 2;
+ if ((addr == 4) || (addr == 5))
+ return -EIO;
+ child->thread.arch.debugregs[addr] = data;
+ return 0;
+ }
+ return -EIO;
}
unsigned long getreg(struct task_struct *child, int regno)
@@ -129,20 +123,20 @@ unsigned long getreg(struct task_struct *child, int regno)
return retval;
}
+/* read the word at location addr in the USER area. */
int peek_user(struct task_struct *child, long addr, long data)
{
-/* read the word at location addr in the USER area. */
unsigned long tmp;
if ((addr & 3) || addr < 0)
return -EIO;
tmp = 0; /* Default return condition */
- if(addr < MAX_REG_OFFSET){
+ if (addr < MAX_REG_OFFSET) {
tmp = getreg(child, addr);
}
- else if((addr >= offsetof(struct user, u_debugreg[0])) &&
- (addr <= offsetof(struct user, u_debugreg[7]))){
+ else if ((addr >= offsetof(struct user, u_debugreg[0])) &&
+ (addr <= offsetof(struct user, u_debugreg[7]))) {
addr -= offsetof(struct user, u_debugreg[0]);
addr = addr >> 2;
tmp = child->thread.arch.debugregs[addr];
@@ -173,15 +167,15 @@ struct i387_fxsave_struct {
static inline unsigned short twd_i387_to_fxsr( unsigned short twd )
{
unsigned int tmp; /* to avoid 16 bit prefixes in the code */
-
+
/* Transform each pair of bits into 01 (valid) or 00 (empty) */
- tmp = ~twd;
- tmp = (tmp | (tmp>>1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */
- /* and move the valid bits to the lower byte. */
- tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */
- tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */
- tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */
- return tmp;
+ tmp = ~twd;
+ tmp = (tmp | (tmp>>1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */
+ /* and move the valid bits to the lower byte. */
+ tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */
+ tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */
+ tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */
+ return tmp;
}
static inline unsigned long twd_fxsr_to_i387( struct i387_fxsave_struct *fxsave )
@@ -235,7 +229,7 @@ static inline int convert_fxsr_to_user(struct _fpstate __user *buf,
return 0;
}
-static inline int convert_fxsr_from_user(struct pt_regs *regs,
+static inline int convert_fxsr_from_user(struct pt_regs *regs,
struct _fpstate __user *buf)
{
return 0;
@@ -247,18 +241,20 @@ int get_fpregs(unsigned long buf, struct task_struct *child)
err = convert_fxsr_to_user((struct _fpstate __user *) buf,
&child->thread.regs);
- if(err) return(-EFAULT);
- else return(0);
+ if (err)
+ return -EFAULT;
+ return 0;
}
int set_fpregs(unsigned long buf, struct task_struct *child)
{
int err;
- err = convert_fxsr_from_user(&child->thread.regs,
+ err = convert_fxsr_from_user(&child->thread.regs,
(struct _fpstate __user *) buf);
- if(err) return(-EFAULT);
- else return(0);
+ if (err)
+ return -EFAULT;
+ return 0;
}
int get_fpxregs(unsigned long buf, struct task_struct *tsk)
@@ -284,7 +280,7 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
fpu->fos = 0;
memcpy(fpu->st_space, (void *) SC_FP_ST(PT_REGS_SC(regs)),
sizeof(fpu->st_space));
- return(1);
+ return 1;
}
#endif
@@ -292,14 +288,3 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu )
{
return 1;
}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-19 00:52:37 +0000