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docs: powerpc: syscall64-abi.rst: fix a malformed table
As reported:
Documentation/powerpc/syscall64-abi.rst:53: WARNING: Malformed table.
Text in column margin in table line 2.
=========== ============= ========================================
--- For the sc instruction, differences with the ELF ABI ---
r0 Volatile (System call number.)
This table requires a different notation to be valid.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Documentation/powerpc/syscall64-abi.rst
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Documentation/powerpc/syscall64-abi.rst
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Register preservation rules match the ELF ABI calling sequence with the
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following differences:
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-
--- For the sc instruction, differences with the ELF ABI ---
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-
=========== ============= ========================================
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-
r0 Volatile (System call number.)
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-
r3 Volatile (Parameter 1, and return value.)
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-
r4-r8 Volatile (Parameters 2-6.)
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-
cr0 Volatile (cr0.SO is the return error condition.)
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-
cr1, cr5-7 Nonvolatile
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-
lr Nonvolatile
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-
=========== ============= ========================================
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-
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-
--- For the scv 0 instruction, differences with the ELF ABI ---
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=========== ============= ========================================
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-
r0 Volatile (System call number.)
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r3 Volatile (Parameter 1, and return value.)
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r4-r8 Volatile (Parameters 2-6.)
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-
=========== ============= ========================================
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+------------------------------------------------------------------------+
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| For the sc instruction, differences with the ELF ABI |
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+--------------+--------------+------------------------------------------+
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| r0 | Volatile | (System call number.) |
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| rr3 | Volatile | (Parameter 1, and return value.) |
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| rr4-r8 | Volatile | (Parameters 2-6.) |
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| rcr0 | Volatile | (cr0.SO is the return error condition.) |
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| rcr1, cr5-7 | Nonvolatile | |
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| rlr | Nonvolatile | |
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+--------------+--------------+------------------------------------------+
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| For the scv 0 instruction, differences with the ELF ABI |
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+--------------+--------------+------------------------------------------+
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| r0 | Volatile | (System call number.) |
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| r3 | Volatile | (Parameter 1, and return value.) |
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| r4-r8 | Volatile | (Parameters 2-6.) |
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+--------------+--------------+------------------------------------------+
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All floating point and vector data registers as well as control and status
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registers are nonvolatile.