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authorMichael Ellerman <mpe@ellerman.id.au>2020-09-14 15:57:18 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2020-09-14 15:57:18 +0300
commit960e3708135ac8b03ef3d1fa773e369cfacc76b9 (patch)
tree3b3b679d211377a291a55fb9598d1c7f408aeab9 /Documentation/powerpc
parentdc462267d2d7aacffc3c1d99b02d7a7c59db7c66 (diff)
parent0460534b532e5518c657c7d6492b9337d975eaa3 (diff)
downloadlinux-960e3708135ac8b03ef3d1fa773e369cfacc76b9.tar.xz
Merge branch 'fixes' into next
Bring in our fixes branch for this cycle which avoids some small conflicts with upcoming commits.
Diffstat (limited to 'Documentation/powerpc')
-rw-r--r--Documentation/powerpc/syscall64-abi.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/powerpc/syscall64-abi.rst b/Documentation/powerpc/syscall64-abi.rst
index 46caaadbb029..379817ca64d2 100644
--- a/Documentation/powerpc/syscall64-abi.rst
+++ b/Documentation/powerpc/syscall64-abi.rst
@@ -49,16 +49,18 @@ Register preservation rules
Register preservation rules match the ELF ABI calling sequence with the
following differences:
-=========== ============= ========================================
--- For the sc instruction, differences with the ELF ABI ---
+=========== ============= ========================================
r0 Volatile (System call number.)
r3 Volatile (Parameter 1, and return value.)
r4-r8 Volatile (Parameters 2-6.)
cr0 Volatile (cr0.SO is the return error condition.)
cr1, cr5-7 Nonvolatile
lr Nonvolatile
+=========== ============= ========================================
--- For the scv 0 instruction, differences with the ELF ABI ---
+=========== ============= ========================================
r0 Volatile (System call number.)
r3 Volatile (Parameter 1, and return value.)
r4-r8 Volatile (Parameters 2-6.)