Messages in this thread Patch in this message | | | From | Lai Jiangshan <> | Subject | [PATCH V6 48/49] x86/entry: Remove save_ret from PUSH_AND_CLEAR_REGS | Date | Fri, 26 Nov 2021 18:12:08 +0800 |
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From: Lai Jiangshan <laijs@linux.alibaba.com>
PUSH_AND_CLEAR_REGS is never used with save_ret anymore.
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> --- arch/x86/entry/calling.h | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-)
diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h index d42012fc694d..6f9de1c6da73 100644 --- a/arch/x86/entry/calling.h +++ b/arch/x86/entry/calling.h @@ -63,15 +63,9 @@ For 32-bit we have the following conventions - kernel is built with * for assembly code: */ -.macro PUSH_REGS rdx=%rdx rax=%rax save_ret=0 - .if \save_ret - pushq %rsi /* pt_regs->si */ - movq 8(%rsp), %rsi /* temporarily store the return address in %rsi */ - movq %rdi, 8(%rsp) /* pt_regs->di (overwriting original return address) */ - .else +.macro PUSH_REGS rdx=%rdx rax=%rax pushq %rdi /* pt_regs->di */ pushq %rsi /* pt_regs->si */ - .endif pushq \rdx /* pt_regs->dx */ pushq %rcx /* pt_regs->cx */ pushq \rax /* pt_regs->ax */ @@ -86,10 +80,6 @@ For 32-bit we have the following conventions - kernel is built with pushq %r14 /* pt_regs->r14 */ pushq %r15 /* pt_regs->r15 */ UNWIND_HINT_REGS - - .if \save_ret - pushq %rsi /* return address on top of stack */ - .endif .endm .macro CLEAR_REGS @@ -114,8 +104,8 @@ For 32-bit we have the following conventions - kernel is built with .endm -.macro PUSH_AND_CLEAR_REGS rdx=%rdx rax=%rax save_ret=0 - PUSH_REGS rdx=\rdx, rax=\rax, save_ret=\save_ret +.macro PUSH_AND_CLEAR_REGS rdx=%rdx rax=%rax + PUSH_REGS rdx=\rdx, rax=\rax CLEAR_REGS .endm -- 2.19.1.6.gb485710b
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