linux-kernel - [PATCH 1/6] x86, 32-bit: Add new pt

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Message-Id: <1260403316-5679-2-git-send-email-brgerst@gmail.com>
Date:	Wed,  9 Dec 2009 19:01:51 -0500
From:	Brian Gerst <brgerst@...il.com>
To:	hpa@...or.com
Cc:	Ingo Molnar <mingo@...e.hu>, x86@...nel.org,
	torvalds@...ux-foundation.org, jeremy@...p.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/6] x86, 32-bit: Add new pt_regs stubs

Add new stubs which add the pt_regs pointer as the last arg, matching
64-bit.  This will allow these syscalls to be easily merged.

Signed-off-by: Brian Gerst <brgerst@...il.com>
---
 arch/x86/kernel/entry_32.S |   49 ++++++++++++++++++++++++++++++++++---------
 1 files changed, 38 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 50b9c22..34dbfa9 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -725,22 +725,49 @@ END(syscall_badsys)
 /*
  * System calls that need a pt_regs pointer.
  */
-#define PTREGSCALL(name) \
+#define PTREGSCALL0(name) \
 	ALIGN; \
 ptregs_##name: \
 	leal 4(%esp),%eax; \
 	jmp sys_##name;
 
-PTREGSCALL(iopl)
-PTREGSCALL(fork)
-PTREGSCALL(clone)
-PTREGSCALL(vfork)
-PTREGSCALL(execve)
-PTREGSCALL(sigaltstack)
-PTREGSCALL(sigreturn)
-PTREGSCALL(rt_sigreturn)
-PTREGSCALL(vm86)
-PTREGSCALL(vm86old)
+#define PTREGSCALL1(name) \
+	ALIGN; \
+ptregs_##name: \
+	leal 4(%esp),%edx; \
+	movl PT_EBX(%edx),%eax; \
+	jmp sys_##name;
+
+#define PTREGSCALL2(name) \
+	ALIGN; \
+ptregs_##name: \
+	leal 4(%esp),%ecx; \
+	movl PT_ECX(%ecx),%edx; \
+	movl PT_EBX(%ecx),%eax; \
+	jmp sys_##name;
+
+#define PTREGSCALL3(name) \
+	ALIGN; \
+ptregs_##name: \
+	leal 4(%esp),%eax; \
+	pushl %eax; \
+	movl PT_EDX(%eax),%ecx; \
+	movl PT_ECX(%eax),%edx; \
+	movl PT_EBX(%eax),%eax; \
+	call sys_##name; \
+	addl $4,%esp; \
+	ret
+
+PTREGSCALL0(iopl)
+PTREGSCALL0(fork)
+PTREGSCALL0(clone)
+PTREGSCALL0(vfork)
+PTREGSCALL0(execve)
+PTREGSCALL0(sigaltstack)
+PTREGSCALL0(sigreturn)
+PTREGSCALL0(rt_sigreturn)
+PTREGSCALL0(vm86)
+PTREGSCALL0(vm86old)
 
 .macro FIXUP_ESPFIX_STACK
 /*
-- 
1.6.5.2

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