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Author SHA1 Message Date
Dmitry V. Levin
1763fa5f62 s390, s390x: fix printing of syscalls unknown to the kernel 
On s390/s390x, syscalls with NR up to 255 can be implemented
directly using "svc NR", for NR >= 256 "svc 0" with %r1=NR is used.
The latter method is allowed for NR < 256, too.

When the syscall number specified directly or indirectly is recognized
by the kernel, i.e. it is less than its NR_syscalls value, it is stored
in %r2 and is available to arch_get_scno via s390_regset.gprs[2].
For syscall numbers >= NR_syscalls this register is set to 0,
but %r1 remains unchanged and could be used by arch_get_scno
via s390_regset.gprs[1] to decide what the syscall number is.

* linux/s390/get_scno.c (arch_get_scno): If s390_regset.gprs[2] is zero,
take syscall number from s390_regset.gprs[1].
* NEWS: Mention this fix.

This fixes Debian bug #485979 and Fedora bug #1298294.
 2016-01-13 21:27:48 +00:00
Dmitry V. Levin
16510517f1 cleanup: make get_scno.c files more readable 
Make get_scno.c files more self-contained.  While they are still
being included by syscall.c, the latter no longer provides
a function framework for them.

* linux/aarch64/get_scno.c (arch_get_scno): Define.
* linux/alpha/get_scno.c: Likewise.
* linux/arc/get_scno.c: Likewise.
* linux/arm/get_scno.c: Likewise.
* linux/avr32/get_scno.c: Likewise.
* linux/bfin/get_scno.c: Likewise.
* linux/crisv10/get_scno.c: Likewise.
* linux/hppa/get_scno.c: Likewise.
* linux/i386/get_scno.c: Likewise.
* linux/ia64/get_scno.c: Likewise.
* linux/m68k/get_scno.c: Likewise.
* linux/metag/get_scno.c: Likewise.
* linux/microblaze/get_scno.c: Likewise.
* linux/mips/get_scno.c: Likewise.
* linux/nios2/get_scno.c: Likewise.
* linux/or1k/get_scno.c: Likewise.
* linux/powerpc/get_scno.c: Likewise.
* linux/powerpc64/get_scno.c: Likewise.
* linux/s390/get_scno.c: Likewise.
* linux/sh/get_scno.c: Likewise.
* linux/sh64/get_scno.c: Likewise.
* linux/sparc/get_scno.c: Likewise.
* linux/sparc64/get_scno.c: Likewise.
* linux/tile/get_scno.c: Likewise.
* linux/x86_64/get_scno.c: Likewise.
* linux/xtensa/get_scno.c: Likewise.
* syscall.c (arch_get_scno): New declaration.
Include "get_scno.c" in file scope.
(get_scno): Use arch_get_scno.

Requested-by: Denys Vlasenko <dvlasenk@redhat.com>
 2015-11-30 01:46:52 +00:00
Dmitry V. Levin
d70d1c4aa6 syscall.c: split arch specific code into separate arch files 
Split code that use arch-specific registers to separate arch files.

* syscall.c: Move definitions of variables containing fetched registers
to linux/*/arch_regs.c files.
[HAVE_GETRVAL2] (getrval2): Move arch-specific code
to linux/*/arch_getrval2.c, include "arch_getrval2.c".
(print_pc): Move arch-specific code to linux/*/print_pc.c files,
include "print_pc.c".
[X86_64] (x86_64_getregs_old): Rename to getregs_old, move to
linux/x86_64/getregs_old.c, include "getregs_old.c".
[POWERPC] (powerpc_getregs_old): Rename to getregs_old, move to
linux/powerpc/getregs_old.c, include "getregs_old.c".
(get_regs) [X86_64, POWERPC]: Update callers.
(get_scno): Move arch-specific code to linux/*/get_scno.c,
include "get_scno.c".
(get_syscall_args): Move arch-specific code
to linux/*/get_syscall_args.c, include "get_syscall_args.c".
(get_error): Move arch-specific code to linux/*/get_error.c,
include "get_error.c".
(get_syscall_result): Move arch-specific code
to linux/*/get_syscall_result.c, include "get_syscall_result.c".
* Makefile.am (EXTRA_DIST): Add new linux/*/*.c files.
 2015-03-23 22:24:59 +00:00