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authorH. Peter Anvin <hpa@linux.intel.com>2011-11-11 16:07:41 -0800
committerH. Peter Anvin <hpa@linux.intel.com>2011-11-17 13:35:37 -0800
commit303395ac3bf3e2cb488435537d416bc840438fcb (patch)
treef979e40575b28ba5bb851d6de0bb0ae5b91541c3 /arch/x86/kernel/entry_32.S
parent29dc54c673ea2531d589400badb4ada5f5f60dae (diff)
x86: Generate system call tables and unistd_*.h from tables
Generate system call tables and unistd_*.h automatically from the tables in arch/x86/syscalls. All other information, like NR_syscalls, is auto-generated, some of which is in asm-offsets_*.c. This allows us to keep all the system call information in one place, and allows for kernel space and user space to see different information; this is currently used for the ia32 system call numbers when building the 64-bit kernel, but will be used by the x32 ABI in the near future. This also removes some gratuitious differences between i386, x86-64 and ia32; in particular, now all system call tables are generated with the same mechanism. Cc: H. J. Lu <hjl.tools@gmail.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/entry_32.S')
-rw-r--r--arch/x86/kernel/entry_32.S37
1 files changed, 14 insertions, 23 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index f3f6f534400..1ffcda22c2f 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -81,8 +81,6 @@
* enough to patch inline, increasing performance.
*/
-#define nr_syscalls ((syscall_table_size)/4)
-
#ifdef CONFIG_PREEMPT
#define preempt_stop(clobbers) DISABLE_INTERRUPTS(clobbers); TRACE_IRQS_OFF
#else
@@ -423,7 +421,7 @@ sysenter_past_esp:
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
jnz sysenter_audit
sysenter_do_call:
- cmpl $(nr_syscalls), %eax
+ cmpl $(NR_syscalls), %eax
jae syscall_badsys
call *sys_call_table(,%eax,4)
movl %eax,PT_EAX(%esp)
@@ -504,7 +502,7 @@ ENTRY(system_call)
# system call tracing in operation / emulation
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
jnz syscall_trace_entry
- cmpl $(nr_syscalls), %eax
+ cmpl $(NR_syscalls), %eax
jae syscall_badsys
syscall_call:
call *sys_call_table(,%eax,4)
@@ -650,7 +648,7 @@ syscall_trace_entry:
movl %esp, %eax
call syscall_trace_enter
/* What it returned is what we'll actually use. */
- cmpl $(nr_syscalls), %eax
+ cmpl $(NR_syscalls), %eax
jnae syscall_call
jmp syscall_exit
END(syscall_trace_entry)
@@ -690,29 +688,28 @@ END(syscall_badsys)
* System calls that need a pt_regs pointer.
*/
#define PTREGSCALL0(name) \
- ALIGN; \
-ptregs_##name: \
+ENTRY(ptregs_##name) ; \
leal 4(%esp),%eax; \
- jmp sys_##name;
+ jmp sys_##name; \
+ENDPROC(ptregs_##name)
#define PTREGSCALL1(name) \
- ALIGN; \
-ptregs_##name: \
+ENTRY(ptregs_##name) ; \
leal 4(%esp),%edx; \
movl (PT_EBX+4)(%esp),%eax; \
- jmp sys_##name;
+ jmp sys_##name; \
+ENDPROC(ptregs_##name)
#define PTREGSCALL2(name) \
- ALIGN; \
-ptregs_##name: \
+ENTRY(ptregs_##name) ; \
leal 4(%esp),%ecx; \
movl (PT_ECX+4)(%esp),%edx; \
movl (PT_EBX+4)(%esp),%eax; \
- jmp sys_##name;
+ jmp sys_##name; \
+ENDPROC(ptregs_##name)
#define PTREGSCALL3(name) \
- ALIGN; \
-ptregs_##name: \
+ENTRY(ptregs_##name) ; \
CFI_STARTPROC; \
leal 4(%esp),%eax; \
pushl_cfi %eax; \
@@ -737,8 +734,7 @@ PTREGSCALL2(vm86)
PTREGSCALL1(vm86old)
/* Clone is an oddball. The 4th arg is in %edi */
- ALIGN;
-ptregs_clone:
+ENTRY(ptregs_clone)
CFI_STARTPROC
leal 4(%esp),%eax
pushl_cfi %eax
@@ -1209,11 +1205,6 @@ return_to_handler:
jmp *%ecx
#endif
-.section .rodata,"a"
-#include "syscall_table_32.S"
-
-syscall_table_size=(.-sys_call_table)
-
/*
* Some functions should be protected against kprobes
*/