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x86: get rid of pt_regs argument of iopl(2)

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-11-19 22:00:52 -05:00
parent ea93a6e2e7
commit b3af11afe0
7 changed files with 17 additions and 24 deletions
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31
arch/x86/kernel/entry_64.S
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@@ -828,23 +828,6 @@ int_restore_rest:
CFI_ENDPROC
END(system_call)
/*
* Certain special system calls that need to save a complete full stack frame.
*/
.macro PTREGSCALL label,func,arg
ENTRY(\label)
PARTIAL_FRAME 1 8 /* offset 8: return address */
subq $REST_SKIP, %rsp
CFI_ADJUST_CFA_OFFSET REST_SKIP
call save_rest
DEFAULT_FRAME 0 8 /* offset 8: return address */
leaq 8(%rsp), \arg /* pt_regs pointer */
call \func
jmp ptregscall_common
CFI_ENDPROC
END(\label)
.endm
.macro FORK_LIKE func
ENTRY(stub_\func)
CFI_STARTPROC
@@ -861,10 +844,22 @@ ENTRY(stub_\func)
END(stub_\func)
.endm
.macro FIXED_FRAME label,func
ENTRY(\label)
CFI_STARTPROC
PARTIAL_FRAME 0 8 /* offset 8: return address */
FIXUP_TOP_OF_STACK %r11, 8-ARGOFFSET
call \func
RESTORE_TOP_OF_STACK %r11, 8-ARGOFFSET
ret
CFI_ENDPROC
END(\label)
.endm
FORK_LIKE clone
FORK_LIKE fork
FORK_LIKE vfork
PTREGSCALL stub_iopl, sys_iopl, %rsi
FIXED_FRAME stub_iopl, sys_iopl
ENTRY(ptregscall_common)
DEFAULT_FRAME 1 8 /* offset 8: return address */