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| author | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-20 23:59:36 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-20 23:59:36 -0800 |
| commit | 5576d187a0eef3bb3c47500eaab33fb5485bc352 (patch) | |
| tree | 608ac1f1091eddf17b4930d59c3a61dad7994614 /arch/powerpc/kernel/signal_32.c | |
| parent | ee2fae03d68e702866a8661fbee7ff2f2f3754d7 (diff) | |
| parent | 1c9bb1a01ac1bc92a0d98cf3e40a7922ee684dc0 (diff) | |
Merge branch 'merge' of master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc
* 'merge' of master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc:
[POWERPC] Fix register save area alignment for swapcontext syscall
[POWERPC] Fix PCI device channel state initialization
[POWERPC] Update MTD OF documentation
[POWERPC] Probe Efika platform before CHRP.
[POWERPC] Fix build of cell zImage.initrd
[POWERPC] iSeries: fix CONFIG_VIOPATH dependency
[POWERPC] iSeries: fix viocons init
[POWERPC] iSeries: fix viocd init
[POWERPC] iSeries: fix iseries_veth init
[POWERPC] iSeries: fix viotape init
[POWERPC] iSeries: fix viodasd init
[POWERPC] Workaround oldworld OF bug with IRQs & P2P bridges
[POWERPC] powerpc: add scanning of ebc bus to of_platform
[POWERPC] spufs: fix assignment of node numbers
[POWERPC] cell: Fix spufs with "new style" device-tree
[POWERPC] cell: Enable spider workarounds on all PCI buses
[POWERPC] cell: add forward struct declarations to spu.h
[POWERPC] cell: update cell_defconfig
Diffstat (limited to 'arch/powerpc/kernel/signal_32.c')
| -rw-r--r-- | arch/powerpc/kernel/signal_32.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index e4ebe1a6228..6b405a3f43f 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -835,11 +835,21 @@ long sys_swapcontext(struct ucontext __user *old_ctx, return -EINVAL; if (old_ctx != NULL) { + struct mcontext __user *mctx; + + /* + * old_ctx might not be 16-byte aligned, in which + * case old_ctx->uc_mcontext won't be either. + * Because we have the old_ctx->uc_pad2 field + * before old_ctx->uc_mcontext, we need to round down + * from &old_ctx->uc_mcontext to a 16-byte boundary. + */ + mctx = (struct mcontext __user *) + ((unsigned long) &old_ctx->uc_mcontext & ~0xfUL); if (!access_ok(VERIFY_WRITE, old_ctx, sizeof(*old_ctx)) - || save_user_regs(regs, &old_ctx->uc_mcontext, 0) + || save_user_regs(regs, mctx, 0) || put_sigset_t(&old_ctx->uc_sigmask, ¤t->blocked) - || __put_user(to_user_ptr(&old_ctx->uc_mcontext), - &old_ctx->uc_regs)) + || __put_user(to_user_ptr(mctx), &old_ctx->uc_regs)) return -EFAULT; } if (new_ctx == NULL) |