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authorMichael Ellerman <michael@ellerman.id.au>2005-11-03 05:10:48 -0500
committerMichael Ellerman <michael@ellerman.id.au>2005-11-03 20:10:51 -0500
commit30415f6a63f3383a18e9adf7c144acabe6893f63 (patch)
tree1243fd078c52fca858145d5b96e6e4a2d310de4e /include/asm-arm26/ptrace.h
parentb8f510219edc719d4c305918e16edc578bcfc16f (diff)
powerpc: Fix random memory corruption in merged elf.h
The merged verison of ELF_CORE_COPY_REGS is basically the PPC64 version, with a memset that came from PPC and a few types abstracted out into #defines. But it's not _quite_ right. The first problem is we calculate the number of registers with: nregs = sizeof(struct pt_regs) / sizeof(ELF_GREG_TYPE) For a 32-bit process on a 64-bit kernel that's bogus because the registers are 64 bits, but ELF_GREG_TYPE is u32, so nregs == 88 which is wrong. The other problem is the memset, which assumes a struct pt_regs is smaller than a struct elf_regs. For a 32-bit process on a 64-bit kernel that's false. The fix is to calculate the number of regs using sizeof(unsigned long), which should always be right, and just memset the whole damn thing _before_ copying the registers in. Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Diffstat (limited to 'include/asm-arm26/ptrace.h')
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