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| author | Max Filippov <jcmvbkbc@gmail.com> | 2017-12-10 06:18:47 +0100 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2017-12-10 23:48:53 +0100 |
| commit | 0013aceb307482ba83a5b6a29f6ba1791be0d32b (patch) | |
| tree | 63f0312a68e62d0f52212ce7bdab9d75e4ee6ead /arch/xtensa/kernel/entry.S | |
| parent | xtensa: use call instead of callx in assembly code (diff) | |
| download | linux-0013aceb307482ba83a5b6a29f6ba1791be0d32b.tar.xz linux-0013aceb307482ba83a5b6a29f6ba1791be0d32b.zip | |
xtensa: clean up fixups in assembly code
Remove duplicate definitions of EX() and similar TRY/CATCH and SRC/DST
macros from assembly sources and put single definition into asm/asmmacro.h
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/kernel/entry.S')
| -rw-r--r-- | arch/xtensa/kernel/entry.S | 33 |
1 files changed, 5 insertions, 28 deletions
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S index 5a2110bb5902..a27a9a65635b 100644 --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S @@ -14,6 +14,7 @@ #include <linux/linkage.h> #include <asm/asm-offsets.h> +#include <asm/asmmacro.h> #include <asm/processor.h> #include <asm/coprocessor.h> #include <asm/thread_info.h> @@ -1094,35 +1095,12 @@ ENDPROC(fast_syscall_unrecoverable) * < VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception * * Note: we don't have to save a2; a2 holds the return value - * - * We use the two macros TRY and CATCH: - * - * TRY adds an entry to the __ex_table fixup table for the immediately - * following instruction. - * - * CATCH catches any exception that occurred at one of the preceding TRY - * statements and continues from there - * - * Usage TRY l32i a0, a1, 0 - * <other code> - * done: rfe - * CATCH <set return code> - * j done */ .literal_position #ifdef CONFIG_FAST_SYSCALL_XTENSA -#define TRY \ - .section __ex_table, "a"; \ - .word 66f, 67f; \ - .text; \ -66: - -#define CATCH \ -67: - ENTRY(fast_syscall_xtensa) s32i a7, a2, PT_AREG7 # we need an additional register @@ -1136,9 +1114,9 @@ ENTRY(fast_syscall_xtensa) .Lswp: /* Atomic compare and swap */ -TRY l32i a0, a3, 0 # read old value +EX(.Leac) l32i a0, a3, 0 # read old value bne a0, a4, 1f # same as old value? jump -TRY s32i a5, a3, 0 # different, modify value +EX(.Leac) s32i a5, a3, 0 # different, modify value l32i a7, a2, PT_AREG7 # restore a7 l32i a0, a2, PT_AREG0 # restore a0 movi a2, 1 # and return 1 @@ -1151,12 +1129,12 @@ TRY s32i a5, a3, 0 # different, modify value .Lnswp: /* Atomic set, add, and exg_add. */ -TRY l32i a7, a3, 0 # orig +EX(.Leac) l32i a7, a3, 0 # orig addi a6, a6, -SYS_XTENSA_ATOMIC_SET add a0, a4, a7 # + arg moveqz a0, a4, a6 # set addi a6, a6, SYS_XTENSA_ATOMIC_SET -TRY s32i a0, a3, 0 # write new value +EX(.Leac) s32i a0, a3, 0 # write new value mov a0, a2 mov a2, a7 @@ -1164,7 +1142,6 @@ TRY s32i a0, a3, 0 # write new value l32i a0, a0, PT_AREG0 # restore a0 rfe -CATCH .Leac: l32i a7, a2, PT_AREG7 # restore a7 l32i a0, a2, PT_AREG0 # restore a0 movi a2, -EFAULT |