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| author | Firoz Khan <firoz.khan@linaro.org> | 2018-12-17 16:10:35 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-12-21 14:46:50 +1100 |
| commit | fbf508da744053ff289777d6dd6e11ca8682be49 (patch) | |
| tree | b61178f92da375be24c4d38941df6d7d0987978a /arch/powerpc/kernel/entry_64.S | |
| parent | a11b763d617070a88267e2102e975b2cfc99b5a7 (diff) | |
| download | lwn-fbf508da744053ff289777d6dd6e11ca8682be49.tar.gz lwn-fbf508da744053ff289777d6dd6e11ca8682be49.zip | |
powerpc: split compat syscall table out from native table
PowerPC uses a syscall table with native and compat calls
interleaved, which is a slightly simpler way to define two
matching tables.
As we move to having the tables generated, that advantage
is no longer important, but the interleaved table gets in
the way of using the same scripts as on the other archit-
ectures.
Split out a new compat_sys_call_table symbol that contains
all the compat calls, and leave the main table for the nat-
ive calls, to more closely match the method we use every-
where else.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Firoz Khan <firoz.khan@linaro.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 5fe1431083a5..435927f549c4 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -54,6 +54,9 @@ SYS_CALL_TABLE: .tc sys_call_table[TC],sys_call_table +COMPAT_SYS_CALL_TABLE: + .tc compat_sys_call_table[TC],compat_sys_call_table + /* This value is used to mark exception frames on the stack. */ exception_marker: .tc ID_EXC_MARKER[TC],STACK_FRAME_REGS_MARKER @@ -178,7 +181,7 @@ system_call: /* label this so stack traces look sane */ ld r11,SYS_CALL_TABLE@toc(2) andis. r10,r10,_TIF_32BIT@h beq 15f - addi r11,r11,8 /* use 32-bit syscall entries */ + ld r11,COMPAT_SYS_CALL_TABLE@toc(2) clrldi r3,r3,32 clrldi r4,r4,32 clrldi r5,r5,32 @@ -186,7 +189,7 @@ system_call: /* label this so stack traces look sane */ clrldi r7,r7,32 clrldi r8,r8,32 15: - slwi r0,r0,4 + slwi r0,r0,3 barrier_nospec_asm /* |