Add CPU trap number and error code to siginfo_t in the SIGSEGV case for x86.
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index 6ea19c2..2f74adf 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -65,6 +65,8 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to,
siginfo_t *from)
err |= __put_user(from->_sifields._pad[0],
&to->_sifields._pad[0]);
switch (from->si_code >> 16) {
case __SI_FAULT >> 16:
+ err |= __put_user(from->si_trapno, &to->si_trapno);
+ err |= __put_user(from->si_error, &to->si_error);
break;
case __SI_CHLD >> 16:
err |= __put_user(from->si_utime, &to->si_utime);
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index a2273d4..0e7940d 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -211,6 +211,8 @@ static noinline void force_sig_info_fault(int si_signo, int
si_code,
info.si_errno = 0;
info.si_code = si_code;
info.si_addr = (void __user *)address;
+ info.si_trapno = tsk->thread.trap_no;
+ info.si_error = tsk->thread.error_code;
force_sig_info(si_signo, &info, tsk);
}
diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c
index 0e26230..6365ba8 100644
--- a/arch/x86/mm/fault_64.c
+++ b/arch/x86/mm/fault_64.c
@@ -502,6 +502,8 @@ bad_area_nosemaphore:
info.si_errno = 0;
/* info.si_code has been set above */
info.si_addr = (void __user *)address;
+ info.si_trapno = tsk->thread.trap_no;
+ info.si_error = tsk->thread.error_code;
force_sig_info(SIGSEGV, &info, tsk);
return;
}
@@ -577,6 +579,8 @@ do_sigbus:
info.si_errno = 0;
info.si_code = BUS_ADRERR;
info.si_addr = (void __user *)address;
+ info.si_trapno = tsk->thread.trap_no;
+ info.si_error = tsk->thread.error_code;
force_sig_info(SIGBUS, &info, tsk);
return;
}
diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h
index 8786e01..b295e86 100644
--- a/include/asm-generic/siginfo.h
+++ b/include/asm-generic/siginfo.h
@@ -82,6 +82,9 @@ typedef struct siginfo {
#ifdef __ARCH_SI_TRAPNO
int _trapno; /* TRAP # which caused the signal */
#endif
+#ifdef __ARCH_SI_ERROR
+ int _error; /* CPU error code */
+#endif
} _sigfault;
/* SIGPOLL */
@@ -112,6 +115,9 @@ typedef struct siginfo {
#ifdef __ARCH_SI_TRAPNO
#define si_trapno _sifields._sigfault._trapno
#endif
+#ifdef __ARCH_SI_ERROR
+#define si_error _sifields._sigfault._error
+#endif
#define si_band _sifields._sigpoll._band
#define si_fd _sifields._sigpoll._fd
diff --git a/include/asm-x86/ia32.h b/include/asm-x86/ia32.h
index 0190b7c..afc75c3 100644
--- a/include/asm-x86/ia32.h
+++ b/include/asm-x86/ia32.h
@@ -119,6 +119,8 @@ typedef struct compat_siginfo{
/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
struct {
unsigned int _addr; /* faulting insn/memory ref. */
+ int _trapno; /* TRAP # which caused the signal */
+ int _error; /* CPU error code */
} _sigfault;
/* SIGPOLL */
diff --git a/include/asm-x86/siginfo.h b/include/asm-x86/siginfo.h
index a477bea..59c8d37 100644
--- a/include/asm-x86/siginfo.h
+++ b/include/asm-x86/siginfo.h
@@ -5,6 +5,9 @@
# define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
#endif
+#define __ARCH_SI_TRAPNO
+#define __ARCH_SI_ERROR
+
#include <asm-generic/siginfo.h>
#endif
diff --git a/include/linux/signalfd.h b/include/linux/signalfd.h
index 86f9b1e..71e3c45 100644
--- a/include/linux/signalfd.h
+++ b/include/linux/signalfd.h
@@ -26,6 +26,8 @@ struct signalfd_siginfo {
__u64 ssi_utime;
__u64 ssi_stime;
__u64 ssi_addr;
+ __u32 ssi_trap_no;
+ __u32 ssi_error_code;
/*
* Pad strcture to 128 bytes. Remember to update the
@@ -36,7 +38,7 @@ struct signalfd_siginfo {
* comes out of a read(2) and we really don't want to have
* a compat on read(2).
*/
- __u8 __pad[48];
+ __u8 __pad[40];
};
diff --git a/kernel/signal.c b/kernel/signal.c
index afa4f78..1e067a1 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2108,6 +2108,9 @@ int copy_siginfo_to_user(siginfo_t __user *to, siginfo_t
*from)
#ifdef __ARCH_SI_TRAPNO
err |= __put_user(from->si_trapno, &to->si_trapno);
#endif
+#ifdef __ARCH_SI_ERROR
+ err |= __put_user(from->si_error, &to->si_error);
+#endif
break;
case __SI_CHLD:
err |= __put_user(from->si_pid, &to->si_pid);
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