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authorDavid Daney <ddaney@caviumnetworks.com>2010-02-18 16:13:04 -0800
committerRalf Baechle <ralf@linux-mips.org>2010-04-12 17:26:14 +0100
commitc52d0d30aef84aa8893b34e5254716c8ab5c4472 (patch)
tree0ba93eb7e305229ceb2ee04119dc7ab22b9fa33d /arch/mips/kernel/syscall.c
parent58b9e2239fa63c7c470acb4a77e9da17e6a6fa4f (diff)
downloadlinux-c52d0d30aef84aa8893b34e5254716c8ab5c4472.tar.bz2
MIPS: Preliminary VDSO
This is a preliminary patch to add a vdso to all user processes. Still missing are ELF headers and .eh_frame information. But it is enough to allow us to move signal trampolines off of the stack. Note that emulation of branch delay slots in the FPU emulator still requires the stack. We allocate a single page (the vdso) and write all possible signal trampolines into it. The stack is moved down by one page and the vdso is mapped into this space. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/975/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/syscall.c')
-rw-r--r--arch/mips/kernel/syscall.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 9587abc67f35..dd81b0f87518 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -79,7 +79,11 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
int do_color_align;
unsigned long task_size;
- task_size = STACK_TOP;
+#ifdef CONFIG_32BIT
+ task_size = TASK_SIZE;
+#else /* Must be CONFIG_64BIT*/
+ task_size = test_thread_flag(TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE;
+#endif
if (len > task_size)
return -ENOMEM;