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authorRoland McGrath <roland@redhat.com>2007-10-17 08:26:55 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 17:42:51 +0200
commit5f149cf0ac2ba6c23d77e39fe03290535d13f13d (patch)
tree835f835ce8d2018570fba7eea20c9e1f9590f76c /include/asm-powerpc
parentAdd linux/elfcore-compat.h (diff)
downloadlinux-5f149cf0ac2ba6c23d77e39fe03290535d13f13d.tar.xz
linux-5f149cf0ac2ba6c23d77e39fe03290535d13f13d.zip
powerpc: Use linux/elfcore-compat.h
This makes powerpc64's compat code use the new linux/elfcore-compat.h, reducing some hand-copied duplication. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Andi Kleen <ak@suse.de> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/elf.h38
1 files changed, 20 insertions, 18 deletions
diff --git a/include/asm-powerpc/elf.h b/include/asm-powerpc/elf.h
index 5b9e3f41d649..8925c2813667 100644
--- a/include/asm-powerpc/elf.h
+++ b/include/asm-powerpc/elf.h
@@ -101,6 +101,7 @@ typedef elf_greg_t64 elf_gregset_t64[ELF_NGREG];
typedef unsigned int elf_greg_t32;
typedef elf_greg_t32 elf_gregset_t32[ELF_NGREG];
+typedef elf_gregset_t32 compat_elf_gregset_t;
/*
* ELF_ARCH, CLASS, and DATA are used to set parameters in the core dumps.
@@ -175,26 +176,27 @@ typedef elf_vrreg_t elf_vrregset_t32[ELF_NVRREG32];
#define ELF_ET_DYN_BASE (0x20000000)
-/* Common routine for both 32-bit and 64-bit processes */
+/*
+ * Our registers are always unsigned longs, whether we're a 32 bit
+ * process or 64 bit, on either a 64 bit or 32 bit kernel.
+ *
+ * This macro relies on elf_regs[i] having the right type to truncate to,
+ * either u32 or u64. It defines the body of the elf_core_copy_regs
+ * function, either the native one with elf_gregset_t elf_regs or
+ * the 32-bit one with elf_gregset_t32 elf_regs.
+ */
+#define PPC_ELF_CORE_COPY_REGS(elf_regs, regs) \
+ int i, nregs = min(sizeof(*regs) / sizeof(unsigned long), \
+ (size_t)ELF_NGREG); \
+ for (i = 0; i < nregs; i++) \
+ elf_regs[i] = ((unsigned long *) regs)[i]; \
+ memset(&elf_regs[i], 0, (ELF_NGREG - i) * sizeof(elf_regs[0]))
+
+/* Common routine for both 32-bit and 64-bit native processes */
static inline void ppc_elf_core_copy_regs(elf_gregset_t elf_regs,
- struct pt_regs *regs)
+ struct pt_regs *regs)
{
- int i, nregs;
-
- memset((void *)elf_regs, 0, sizeof(elf_gregset_t));
-
- /* Our registers are always unsigned longs, whether we're a 32 bit
- * process or 64 bit, on either a 64 bit or 32 bit kernel.
- * Don't use ELF_GREG_TYPE here. */
- nregs = sizeof(struct pt_regs) / sizeof(unsigned long);
- if (nregs > ELF_NGREG)
- nregs = ELF_NGREG;
-
- for (i = 0; i < nregs; i++) {
- /* This will correctly truncate 64 bit registers to 32 bits
- * for a 32 bit process on a 64 bit kernel. */
- elf_regs[i] = (elf_greg_t)((ELF_GREG_TYPE *)regs)[i];
- }
+ PPC_ELF_CORE_COPY_REGS(elf_regs, regs);
}
#define ELF_CORE_COPY_REGS(gregs, regs) ppc_elf_core_copy_regs(gregs, regs);