Merge remote-tracking branch 'torvalds/master' into perf/core

[sfrench/cifs-2.6.git] / Documentation / powerpc / syscall64-abi.rst

diff --git a/Documentation/powerpc/syscall64-abi.rst b/Documentation/powerpc/syscall64-abi.rst
index cf9b2857c72aa3ffbcda31b726d177b6c11c2730..dabee3729e5a5b1a12ed4c4274c2616e48660602 100644 (file)
--- a/Documentation/powerpc/syscall64-abi.rst
+++ b/Documentation/powerpc/syscall64-abi.rst
@@ -46,25 +46,38 @@ stack frame LR and CR save fields are not used.
 
 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.)                   |
-| rr3          | Volatile     | (Parameter 1, and return value.)        |
-| rr4-r8       | Volatile     | (Parameters 2-6.)                       |
-| rcr0         | Volatile     | (cr0.SO is the return error condition.)         |
-| rcr1, cr5-7  | Nonvolatile  |                                                 |
-| rlr          | 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.)                       |
-+--------------+--------------+------------------------------------------+
+Register preservation rules match the ELF ABI calling sequence with some
+differences.
+
+For the sc instruction, the differences from the ELF ABI are as follows:
+
++--------------+--------------------+-----------------------------------------+
+| Register     | Preservation Rules | Purpose                                 |
++==============+====================+=========================================+
+| 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, the differences from the ELF ABI are as follows:
+
++--------------+--------------------+-----------------------------------------+
+| Register     | Preservation Rules | Purpose                                 |
++==============+====================+=========================================+
+| r0           | Volatile           | (System call number.)                   |
++--------------+--------------------+-----------------------------------------+
+| r3           | Volatile           | (Parameter 1, and return value.)        |
++--------------+--------------------+-----------------------------------------+
+| r4-r8        | Volatile           | (Parameters 2-6.)                       |
++--------------+--------------------+-----------------------------------------+
 
 All floating point and vector data registers as well as control and status
 registers are nonvolatile.