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80 lines
1.9 KiB
Diff
80 lines
1.9 KiB
Diff
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From a05af27aec00eacf533ff111ba8eb3dec328d9af Mon Sep 17 00:00:00 2001
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From: Kurt Mahan <kmahan@freescale.com>
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Date: Thu, 22 May 2008 11:20:53 -0600
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Subject: [PATCH] Initial vDSO header changes.
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LTIBName: mcfv4e-vdso-headers
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Signed-off-by: Kurt Mahan <kmahan@freescale.com>
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---
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include/asm-m68k/auxvec.h | 9 +++++++++
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include/asm-m68k/elf.h | 31 +++++++++++++++++++++++++++++++
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include/asm-m68k/page.h | 5 +++++
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3 files changed, 45 insertions(+), 0 deletions(-)
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--- a/include/asm-m68k/auxvec.h
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+++ b/include/asm-m68k/auxvec.h
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@@ -1,4 +1,13 @@
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#ifndef __ASMm68k_AUXVEC_H
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#define __ASMm68k_AUXVEC_H
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+/*
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+ * Architecture-neutral AT_ values in 0-17, leave some room
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+ * for more of them.
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+ */
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+
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+#ifdef CONFIG_VSYSCALL
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+/* Entry point to the vsyscall page */
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+#define AT_SYSINFO_EHDR 33
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+#endif
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#endif
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--- a/include/asm-m68k/elf.h
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+++ b/include/asm-m68k/elf.h
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@@ -136,4 +136,35 @@ typedef struct user_m68kfp_struct elf_fp
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#define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX)
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+/*
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+ * VDSO
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+ */
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+#ifdef CONFIG_VSYSCALL
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+extern unsigned int vdso_enabled;
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+
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+#define VDSO_BASE ((unsigned long)current->mm->context.vdso)
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+#define VDSO_SYM(x) (VDSO_BASE + (unsigned long)(x))
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+
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+#define VSYSCALL_AUX_ENT \
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+ if (vdso_enabled) \
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+ NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE);
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+
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+/* additional pages */
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+#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
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+
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+struct linux_binprm;
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+extern int arch_setup_additional_pages(struct linux_binprm *bprm,
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+ int executable_stack);
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+
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+#else
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+/* no VSYSCALL_AUX_ENT */
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+#define VSYSCALL_AUX_ENT
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+#endif
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+
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+#define ARCH_DLINFO \
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+do { \
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+ /* vsyscall entry */ \
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+ VSYSCALL_AUX_ENT; \
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+} while (0);
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+
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#endif
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--- a/include/asm-m68k/page.h
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+++ b/include/asm-m68k/page.h
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@@ -252,4 +252,9 @@ static inline __attribute_const__ int __
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#include <asm-generic/page.h>
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+#ifdef CONFIG_VSYSCALL
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+/* vDSO support */
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+#define __HAVE_ARCH_GATE_AREA
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+#endif
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+
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#endif /* _M68K_PAGE_H */
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