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Date: Wed, 02 Jan 2008 05:33:35 -0800
From: Harvey Harrison <harvey.harrison@...il.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: "H. Peter Anvin" <hpa@...or.com>,
LKML <linux-kernel@...r.kernel.org>,
Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] x86: introduce force_sig_info_fault helper to X86_64
Use the force_sig_info_fault helper from X86_32 in X86_64.
Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
arch/x86/mm/fault_32.c | 2 +-
arch/x86/mm/fault_64.c | 31 ++++++++++++++++++-------------
2 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 300c9d8..b1893eb 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -249,7 +249,7 @@ static int is_prefetch(struct pt_regs *regs, unsigned long addr,
return prefetch;
}
-static noinline void force_sig_info_fault(int si_signo, int si_code,
+static void force_sig_info_fault(int si_signo, int si_code,
unsigned long address, struct task_struct *tsk)
{
siginfo_t info;
diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c
index dd41793..357a3e0 100644
--- a/arch/x86/mm/fault_64.c
+++ b/arch/x86/mm/fault_64.c
@@ -252,6 +252,18 @@ static int is_prefetch(struct pt_regs *regs, unsigned long addr,
return prefetch;
}
+static void force_sig_info_fault(int si_signo, int si_code,
+ unsigned long address, struct task_struct *tsk)
+{
+ siginfo_t info;
+
+ info.si_signo = si_signo;
+ info.si_errno = 0;
+ info.si_code = si_code;
+ info.si_addr = (void __user *)address;
+ force_sig_info(si_signo, &info, tsk);
+}
+
static int bad_address(void *p)
{
unsigned long dummy;
@@ -415,7 +427,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
unsigned long address;
int write, fault;
unsigned long flags;
- siginfo_t info;
+ int si_code;
/*
* We can fault from pretty much anywhere, with unknown IRQ state.
@@ -429,7 +441,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
/* get the address */
address = read_cr2();
- info.si_code = SEGV_MAPERR;
+ si_code = SEGV_MAPERR;
/*
@@ -532,7 +544,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
* we can handle it..
*/
good_area:
- info.si_code = SEGV_ACCERR;
+ si_code = SEGV_ACCERR;
write = 0;
switch (error_code & (PF_PROT|PF_WRITE)) {
default: /* 3: write, present */
@@ -611,11 +623,8 @@ bad_area_nosemaphore:
/* Kernel addresses are always protection faults */
tsk->thread.error_code = error_code | (address >= TASK_SIZE);
tsk->thread.trap_no = 14;
- info.si_signo = SIGSEGV;
- info.si_errno = 0;
- /* info.si_code has been set above */
- info.si_addr = (void __user *)address;
- force_sig_info(SIGSEGV, &info, tsk);
+
+ force_sig_info_fault(SIGSEGV, si_code, address, tsk);
return;
}
@@ -682,11 +691,7 @@ do_sigbus:
tsk->thread.cr2 = address;
tsk->thread.error_code = error_code;
tsk->thread.trap_no = 14;
- info.si_signo = SIGBUS;
- info.si_errno = 0;
- info.si_code = BUS_ADRERR;
- info.si_addr = (void __user *)address;
- force_sig_info(SIGBUS, &info, tsk);
+ force_sig_info_fault(SIGBUS, BUS_ADRERR, address, tsk);
return;
}
--
1.5.4.rc2.1097.gb6e0d
--
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