diff options
| author | Douglas Raillard <douglas.raillard@arm.com> | 2017-07-26 19:23:16 +0100 |
|---|---|---|
| committer | Douglas Raillard <douglas.raillard@arm.com> | 2017-08-02 17:16:09 +0100 |
| commit | 5c2c88b558a9dfcf5203057fa39d7a702d1bc433 (patch) | |
| tree | d2e603d498b5850d5764e76b6bb80f5f9e23d515 /bl2u | |
| parent | 5e2cbb361e28968d26bbb0c3efd541ff543785cc (diff) | |
Fix BL2U entrypoint possible parameter corruption
Replace the use of r12 by r10 to save the value of a parameter of
bl2u_entrypoint to pass it to bl2u_early_platform_setup at the end of
the function. r10 is a callee saved register so it will not become
corrupted by C code, whereas r12 is the The Intra-Procedure-call scratch
register potentially used by veneers. See the ARM AAPCS document (ARM
IHI 0042F).
Change-Id: I4f37e54a6b550719edb40bb24cd8f498827e2749
Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>
Diffstat (limited to 'bl2u')
| -rw-r--r-- | bl2u/aarch32/bl2u_entrypoint.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/bl2u/aarch32/bl2u_entrypoint.S b/bl2u/aarch32/bl2u_entrypoint.S index 1fa669eb..7fb64f3e 100644 --- a/bl2u/aarch32/bl2u_entrypoint.S +++ b/bl2u/aarch32/bl2u_entrypoint.S @@ -32,7 +32,7 @@ func bl2u_entrypoint * --------------------------------------------- */ mov r11, r1 - mov r12, r2 + mov r10, r2 /* --------------------------------------------- * Set the exception vector to something sane. @@ -107,7 +107,7 @@ func bl2u_entrypoint * --------------------------------------------- */ mov r0, r11 - mov r1, r12 + mov r1, r10 bl bl2u_early_platform_setup bl bl2u_plat_arch_setup |