diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-16 14:41:24 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-26 20:58:16 +1000 |
| commit | b150a4d12b919baf956b807aa305cf78df03d0fe (patch) | |
| tree | ba2cae6103c8ce646db2b7dc93dd48912c21a77b /arch/powerpc/kernel/vmlinux.lds.S | |
| parent | 331771e836e6a32c8632d8cf5e2cdd94471258ad (diff) | |
| download | linux-b150a4d12b919baf956b807aa305cf78df03d0fe.tar.gz linux-b150a4d12b919baf956b807aa305cf78df03d0fe.tar.bz2 linux-b150a4d12b919baf956b807aa305cf78df03d0fe.zip | |
powerpc/vmlinux.lds: Add an explicit symbol for the SRWX boundary
Currently __init_begin is used as the boundary for strict RWX between
executable/read-only text and data, and non-executable (after boot) code
and data.
But that's a little subtle, so add an explicit symbol to document that
the SRWX boundary lies there, and add a comment making it clear that
__init_begin must also begin there.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220916131422.318752-2-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/kernel/vmlinux.lds.S')
| -rw-r--r-- | arch/powerpc/kernel/vmlinux.lds.S | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index dacf8b4302d9..29d891329856 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -214,11 +214,16 @@ SECTIONS } #endif + /* + * Various code relies on __init_begin being at the strict RWX boundary. + */ + . = ALIGN(STRICT_ALIGN_SIZE); + __srwx_boundary = .; + __init_begin = .; + /* * Init sections discarded at runtime */ - . = ALIGN(STRICT_ALIGN_SIZE); - __init_begin = .; .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { _sinittext = .; INIT_TEXT |