From a7f290dad32ee34d931561b7943c858fe2aae503 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Fri, 11 Nov 2005 21:15:21 +1100 Subject: [PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel This patch moves the vdso's to arch/powerpc, adds support for the 32 bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds some new (still untested) routines to both vdso's: clock_gettime() with support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same clocks) and get_tbfreq() for glibc to retreive the timebase frequency. Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits returns a long long (r3, r4) not a long. This is such that if we ever add support for >4Ghz timebases on ppc32, the userland interface won't have to change. I have tested gettimeofday() using some glibc patches in both ppc32 and ppc64 kernels using 32 bits userland (I haven't had a chance to test a 64 bits userland yet, but the implementation didn't change and was tested earlier). I haven't tested yet the new functions. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- include/asm-powerpc/vdso.h | 83 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 include/asm-powerpc/vdso.h (limited to 'include/asm-powerpc/vdso.h') diff --git a/include/asm-powerpc/vdso.h b/include/asm-powerpc/vdso.h new file mode 100644 index 00000000000..85d8a7be25c --- /dev/null +++ b/include/asm-powerpc/vdso.h @@ -0,0 +1,83 @@ +#ifndef __PPC64_VDSO_H__ +#define __PPC64_VDSO_H__ + +#ifdef __KERNEL__ + +/* Default link addresses for the vDSOs */ +#define VDSO32_LBASE 0x100000 +#define VDSO64_LBASE 0x100000 + +/* Default map addresses */ +#define VDSO32_MBASE VDSO32_LBASE +#define VDSO64_MBASE VDSO64_LBASE + +#define VDSO_VERSION_STRING LINUX_2.6.12 + +/* Define if 64 bits VDSO has procedure descriptors */ +#undef VDS64_HAS_DESCRIPTORS + +#ifndef __ASSEMBLY__ + +extern unsigned int vdso64_pages; +extern unsigned int vdso32_pages; + +/* Offsets relative to thread->vdso_base */ +extern unsigned long vdso64_rt_sigtramp; +extern unsigned long vdso32_sigtramp; +extern unsigned long vdso32_rt_sigtramp; + +extern void vdso_init(void); + +#else /* __ASSEMBLY__ */ + +#ifdef __VDSO64__ +#ifdef VDS64_HAS_DESCRIPTORS +#define V_FUNCTION_BEGIN(name) \ + .globl name; \ + .section ".opd","a"; \ + .align 3; \ + name: \ + .quad .name,.TOC.@tocbase,0; \ + .previous; \ + .globl .name; \ + .type .name,@function; \ + .name: \ + +#define V_FUNCTION_END(name) \ + .size .name,.-.name; + +#define V_LOCAL_FUNC(name) (.name) + +#else /* VDS64_HAS_DESCRIPTORS */ + +#define V_FUNCTION_BEGIN(name) \ + .globl name; \ + name: \ + +#define V_FUNCTION_END(name) \ + .size name,.-name; + +#define V_LOCAL_FUNC(name) (name) + +#endif /* VDS64_HAS_DESCRIPTORS */ +#endif /* __VDSO64__ */ + +#ifdef __VDSO32__ + +#define V_FUNCTION_BEGIN(name) \ + .globl name; \ + .type name,@function; \ + name: \ + +#define V_FUNCTION_END(name) \ + .size name,.-name; + +#define V_LOCAL_FUNC(name) (name) + +#endif /* __VDSO32__ */ + +#endif /* __ASSEMBLY__ */ + +#endif /* __KERNEL__ */ + +#endif /* __PPC64_VDSO_H__ */ -- cgit v1.2.3