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| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2020-06-30 20:52:03 +0200 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2020-07-20 10:55:50 +0200 |
| commit | 05a68e892e89c97df6650cd8cc55058002657cbc (patch) | |
| tree | 50da3706b76870f99a1acf549c9cbf4227388baf /arch/s390/include/asm/linkage.h | |
| parent | 88aa8939c96781089e5ace3492d818074c5c6fe9 (diff) | |
| download | linux-05a68e892e89c97df6650cd8cc55058002657cbc.tar.gz | |
s390/kernel: expand exception table logic to allow new handling options
This is a s390 port of commit 548acf19234d ("x86/mm: Expand the
exception table logic to allow new handling options"), which is needed
for implementing BPF_PROBE_MEM on s390.
The new handler field is made 64-bit in order to allow pointing from
dynamically allocated entries to handlers in kernel text. Unlike on x86,
NULL is used instead of ex_handler_default. This is because exception
tables are used by boot/text_dma.S, and it would be a pain to preserve
ex_handler_default.
The new infrastructure is ignored in early_pgm_check_handler, since
there is no pt_regs.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/linkage.h')
| -rw-r--r-- | arch/s390/include/asm/linkage.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/include/asm/linkage.h b/arch/s390/include/asm/linkage.h index 1b52c07b5642..a0a7a2c72bd4 100644 --- a/arch/s390/include/asm/linkage.h +++ b/arch/s390/include/asm/linkage.h @@ -14,9 +14,10 @@ #define __EX_TABLE(_section, _fault, _target) \ stringify_in_c(.section _section,"a";) \ - stringify_in_c(.align 4;) \ + stringify_in_c(.align 8;) \ stringify_in_c(.long (_fault) - .;) \ stringify_in_c(.long (_target) - .;) \ + stringify_in_c(.quad 0;) \ stringify_in_c(.previous) #define EX_TABLE(_fault, _target) \ |