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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2019-12-21 08:32:28 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-01-26 22:15:09 +1100 |
| commit | 63289e7d3a645a4291ec43c1d526dd4a811da1a0 (patch) | |
| tree | 0fca41eaaab4e435a4bb9b66910ad367133e72af /arch/powerpc/kernel/vmlinux.lds.S | |
| parent | powerpc/32: prepare for CONFIG_VMAP_STACK (diff) | |
| download | linux-dev-63289e7d3a645a4291ec43c1d526dd4a811da1a0.tar.xz linux-dev-63289e7d3a645a4291ec43c1d526dd4a811da1a0.zip | |
powerpc: align stack to 2 * THREAD_SIZE with VMAP_STACK
In order to ease stack overflow detection, align
stack to 2 * THREAD_SIZE when using VMAP_STACK.
This allows overflow detection using a single bit check.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/60e9ae86b7d2cdcf21468787076d345663648f46.1576916812.git.christophe.leroy@c-s.fr
Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/kernel/vmlinux.lds.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 8834220036a5..b4c89a1acebb 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -323,7 +323,7 @@ SECTIONS #endif /* The initial task and kernel stack */ - INIT_TASK_DATA_SECTION(THREAD_SIZE) + INIT_TASK_DATA_SECTION(THREAD_ALIGN) .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) { PAGE_ALIGNED_DATA(PAGE_SIZE) |