Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
parisc: Avoid compat syscalls when COMPAT=n
Drop unnecessary code and syscall tables when we run a 64-bit
kernel with conpat mode disabled.
Signed-off-by: Helge Deller <deller@gmx.de>
+7
-4
+7
-4
arch/parisc/kernel/syscall.S
+7
-4
arch/parisc/kernel/syscall.S
···
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241
/* Note! We cannot use the syscall table that is mapped
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nearby since the gateway page is mapped execute-only. */
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-
#ifdef CONFIG_64BIT
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+
#ifdef CONFIG_COMPAT
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ldil L%sys_call_table, %r1
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or,ev %r2,%r2,%r2
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ldil L%sys_call_table64, %r1
···
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ldo R%sys_call_table64(%r1), %r19
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#else
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load32 sys_call_table, %r19
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-
#endif
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+
#endif
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comiclr,>> __NR_Linux_syscalls, %r20, %r0
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b,n .Lsyscall_nosys
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256
···
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/* Note! We cannot use the syscall table that is mapped
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nearby since the gateway page is mapped execute-only. */
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377
-
#ifdef CONFIG_64BIT
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+
#ifdef CONFIG_COMPAT
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LDREG TASK_PT_GR30(%r1), %r19 /* get users sp back */
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extrd,u %r19,63,1,%r2 /* W hidden in bottom bit */
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380
···
1326
1326
END(lws_table)
1327
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/* End of lws table */
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1328
1329
-
#ifdef CONFIG_64BIT
1329
+
#ifdef CONFIG_COMPAT
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#define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, compat)
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#else
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#define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
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#endif
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#define __SYSCALL(nr, entry) ASM_ULONG_INSN entry
1335
+
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.align 8
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ENTRY(sys_call_table)
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.export sys_call_table,data
1339
+
#if defined(CONFIG_COMPAT) || !defined(CONFIG_64BIT)
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#include <asm/syscall_table_32.h> /* 32-bit syscalls */
1341
+
#endif
1339
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END(sys_call_table)
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#ifdef CONFIG_64BIT