[PATCH v2 18/31] arm64: VDSO support

2012-08-14 Thread Catalin Marinas 
From: Will Deacon 

This patch adds VDSO support for 64-bit applications. The VDSO code is
currently used for sys_rt_sigreturn() and optimised gettimeofday()
(using the user-accessible generic counter).

Signed-off-by: Will Deacon 
Signed-off-by: Catalin Marinas 
---
 arch/arm64/include/asm/vdso.h  |   41 +
 arch/arm64/include/asm/vdso_datapage.h |   43 +
 arch/arm64/kernel/vdso.c   |  261 
 arch/arm64/kernel/vdso/.gitignore  |2 +
 arch/arm64/kernel/vdso/Makefile|   63 +++
 arch/arm64/kernel/vdso/gen_vdso_offsets.sh |   15 ++
 arch/arm64/kernel/vdso/gettimeofday.S  |  242 ++
 arch/arm64/kernel/vdso/note.S  |   28 +++
 arch/arm64/kernel/vdso/sigreturn.S |   37 
 arch/arm64/kernel/vdso/vdso.S  |   33 
 arch/arm64/kernel/vdso/vdso.lds.S  |  100 +++
 11 files changed, 865 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm64/include/asm/vdso.h
 create mode 100644 arch/arm64/include/asm/vdso_datapage.h
 create mode 100644 arch/arm64/kernel/vdso.c
 create mode 100644 arch/arm64/kernel/vdso/.gitignore
 create mode 100644 arch/arm64/kernel/vdso/Makefile
 create mode 100755 arch/arm64/kernel/vdso/gen_vdso_offsets.sh
 create mode 100644 arch/arm64/kernel/vdso/gettimeofday.S
 create mode 100644 arch/arm64/kernel/vdso/note.S
 create mode 100644 arch/arm64/kernel/vdso/sigreturn.S
 create mode 100644 arch/arm64/kernel/vdso/vdso.S
 create mode 100644 arch/arm64/kernel/vdso/vdso.lds.S

diff --git a/arch/arm64/include/asm/vdso.h b/arch/arm64/include/asm/vdso.h
new file mode 100644
index 000..839ce00
--- /dev/null
+++ b/arch/arm64/include/asm/vdso.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2012 ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see .
+ */
+#ifndef __ASM_VDSO_H
+#define __ASM_VDSO_H
+
+#ifdef __KERNEL__
+
+/*
+ * Default link address for the vDSO.
+ * Since we randomise the VDSO mapping, there's little point in trying
+ * to prelink this.
+ */
+#define VDSO_LBASE 0x0
+
+#ifndef __ASSEMBLY__
+
+#include 
+
+#define VDSO_SYMBOL(base, name)
   \
+({\
+   (void *)(vdso_offset_##name - VDSO_LBASE + (unsigned long)(base)); \
+})
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_VDSO_H */
diff --git a/arch/arm64/include/asm/vdso_datapage.h 
b/arch/arm64/include/asm/vdso_datapage.h
new file mode 100644
index 000..de66199
--- /dev/null
+++ b/arch/arm64/include/asm/vdso_datapage.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2012 ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see .
+ */
+#ifndef __ASM_VDSO_DATAPAGE_H
+#define __ASM_VDSO_DATAPAGE_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+struct vdso_data {
+   __u64 cs_cycle_last;/* Timebase at clocksource init */
+   __u64 xtime_clock_sec;  /* Kernel time */
+   __u64 xtime_clock_nsec;
+   __u64 xtime_coarse_sec; /* Coarse time */
+   __u64 xtime_coarse_nsec;
+   __u64 wtm_clock_sec;/* Wall to monotonic time */
+   __u64 wtm_clock_nsec;
+   __u32 tb_seq_count; /* Timebase sequence counter */
+   __u32 cs_mult;  /* Clocksource multiplier */
+   __u32 cs_shift; /* Clocksource shift */
+   __u32 tz_minuteswest;   /* Whacky timezone stuff */
+   __u32 tz_dsttime;
+   __u32 use_syscall;
+};
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_VDSO_DATAPAGE_H */
diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
new file mode 100644
index 000..8d8a365
--- /dev/null
+++ b/arch/arm64/kernel/vdso.c
@@ -0,0 +1,261 @@
+/*
+ * VDSO implementation for AArch64 and vector page setup for AArch32.
+ *
+ * Copyright (C) 2012 ARM Limited
+

[PATCH v2 18/31] arm64: VDSO support

2012-08-14 Thread Catalin Marinas 
From: Will Deacon will.dea...@arm.com

This patch adds VDSO support for 64-bit applications. The VDSO code is
currently used for sys_rt_sigreturn() and optimised gettimeofday()
(using the user-accessible generic counter).

Signed-off-by: Will Deacon will.dea...@arm.com
Signed-off-by: Catalin Marinas catalin.mari...@arm.com
---
 arch/arm64/include/asm/vdso.h  |   41 +
 arch/arm64/include/asm/vdso_datapage.h |   43 +
 arch/arm64/kernel/vdso.c   |  261 
 arch/arm64/kernel/vdso/.gitignore  |2 +
 arch/arm64/kernel/vdso/Makefile|   63 +++
 arch/arm64/kernel/vdso/gen_vdso_offsets.sh |   15 ++
 arch/arm64/kernel/vdso/gettimeofday.S  |  242 ++
 arch/arm64/kernel/vdso/note.S  |   28 +++
 arch/arm64/kernel/vdso/sigreturn.S |   37 
 arch/arm64/kernel/vdso/vdso.S  |   33 
 arch/arm64/kernel/vdso/vdso.lds.S  |  100 +++
 11 files changed, 865 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm64/include/asm/vdso.h
 create mode 100644 arch/arm64/include/asm/vdso_datapage.h
 create mode 100644 arch/arm64/kernel/vdso.c
 create mode 100644 arch/arm64/kernel/vdso/.gitignore
 create mode 100644 arch/arm64/kernel/vdso/Makefile
 create mode 100755 arch/arm64/kernel/vdso/gen_vdso_offsets.sh
 create mode 100644 arch/arm64/kernel/vdso/gettimeofday.S
 create mode 100644 arch/arm64/kernel/vdso/note.S
 create mode 100644 arch/arm64/kernel/vdso/sigreturn.S
 create mode 100644 arch/arm64/kernel/vdso/vdso.S
 create mode 100644 arch/arm64/kernel/vdso/vdso.lds.S

diff --git a/arch/arm64/include/asm/vdso.h b/arch/arm64/include/asm/vdso.h
new file mode 100644
index 000..839ce00
--- /dev/null
+++ b/arch/arm64/include/asm/vdso.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2012 ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see http://www.gnu.org/licenses/.
+ */
+#ifndef __ASM_VDSO_H
+#define __ASM_VDSO_H
+
+#ifdef __KERNEL__
+
+/*
+ * Default link address for the vDSO.
+ * Since we randomise the VDSO mapping, there's little point in trying
+ * to prelink this.
+ */
+#define VDSO_LBASE 0x0
+
+#ifndef __ASSEMBLY__
+
+#include generated/vdso-offsets.h
+
+#define VDSO_SYMBOL(base, name)
   \
+({\
+   (void *)(vdso_offset_##name - VDSO_LBASE + (unsigned long)(base)); \
+})
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_VDSO_H */
diff --git a/arch/arm64/include/asm/vdso_datapage.h 
b/arch/arm64/include/asm/vdso_datapage.h
new file mode 100644
index 000..de66199
--- /dev/null
+++ b/arch/arm64/include/asm/vdso_datapage.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2012 ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see http://www.gnu.org/licenses/.
+ */
+#ifndef __ASM_VDSO_DATAPAGE_H
+#define __ASM_VDSO_DATAPAGE_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+struct vdso_data {
+   __u64 cs_cycle_last;/* Timebase at clocksource init */
+   __u64 xtime_clock_sec;  /* Kernel time */
+   __u64 xtime_clock_nsec;
+   __u64 xtime_coarse_sec; /* Coarse time */
+   __u64 xtime_coarse_nsec;
+   __u64 wtm_clock_sec;/* Wall to monotonic time */
+   __u64 wtm_clock_nsec;
+   __u32 tb_seq_count; /* Timebase sequence counter */
+   __u32 cs_mult;  /* Clocksource multiplier */
+   __u32 cs_shift; /* Clocksource shift */
+   __u32 tz_minuteswest;   /* Whacky timezone stuff */
+   __u32 tz_dsttime;
+   __u32 use_syscall;
+};
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_VDSO_DATAPAGE_H */
diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
new file mode 100644
index 000..8d8a365
--- /dev/null
+++ b/arch/arm64/kernel/vdso.c
@@ -0,0 +1,261 @@
+/*
+ * VDSO implementation for