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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.
Linux kernel commit v4.3-rc1-50-g8d4bd0e corrected uc_sigmask
of the compat signal frame, so remove the old workaround.
* linux/s390/arch_sigreturn.c (arch_sigreturn) [S390]: Remove.
Print the second return value of getxpid, getxuid, and getxgid syscalls
that return a pair of values using the same mechanism as pipe syscall.
* alpha.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* linux/alpha/syscallent.h [20]: Change SEN(getpid) to SEN(getxpid).
[24]: Change SEN(getuid) to SEN(getxuid).
[47]: Change SEN(getgid) to SEN(getxgid).
* NEWS: Mention this enhancement.
* tests/uid.awk: Update for getxgid output change.
* tests/uid.test: Cleanup.
* tests/getxxid.c: New file.
* tests/getxxid.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add getxxid.
(TESTS): Add getxxid.test.
* tests/.gitignore: Add getxxid.
On architectures that use dedicated registers to report syscall errors,
check for syscall error condition regardless of SYSCALL_NEVER_FAILS flag
in the syscall entry. On architectures that use negated errno
semantics, there is no way to distinguish a syscall error from a valid
return code that looks like a syscall error, and the check for
SYSCALL_NEVER_FAILS flag remains the only way to tell one case
from another.
* linux/alpha/get_error.c (get_error): Ignore check_errno.
* linux/ia64/get_error.c: Likewise.
* linux/mips/get_error.c: Likewise.
* linux/nios2/get_error.c: Likewise.
* linux/powerpc/get_error.c: Likewise.
* linux/sparc/get_error.c: Likewise.
* linux/sparc64/get_error.c: Likewise.
Starting with commit
v2.6.29-6609-g11d06b2a1e5658f448a308aa3beb97bacd64a940, personality
syscall never fails to set the personality, but before commit
v2.6.35-rc1-372-g485d527 it still could return an error.
Starting with that commit, personality syscall never returns an error.
* linux/*/syscallent.h: Set SYSCALL_NEVER_FAILS flag in personality
syscall entries.
Before this change, all files that exist since 20th century had
copyright headers, while most files that appeared later didn't. This
change fixes the inconsistency by adding missing copyright headers.
It doesn't mean that copyright headers became maintained. In my view,
git history provides much better information on this subject and is much
more accurate than copyright headers.
The syscall_name argument was subject to macro expansion because
it was passed down to other macros before it was prefixed.
musl libc defines lfs64 names as macros (e.g. fstat64 as fstat)
so SYS_FUNC(fstat64) was expanded to sys_fstat.
This change adds the prefix before the name is passed to other macros,
i.e. the argument of SYS_FUNC_NAME is already prefixed with sys_.
* defs.h (SYS_FUNC): Add sys_ prefix to SYS_FUNC_NAME's argument.
(SYS_FUNC_NAME): Do not add sys_ prefix to MPERS_FUNC_NAME's argument.
* linux/ia64/syscallent.h (SYS_FUNC_NAME): Do not add sys_ prefix
to MPERS_FUNC_NAME's argument.
* syscall.c (SEN_NAME): Remove.
(SEN): Replace SEN_NAME call with its definition. Add sys_ prefix
to SYS_FUNC_NAME's argument.
Follow the x86_64 example and define registers in arm_pt_regs
as unsigned, to avoid potential sign extension bugs.
This also fixes --enable-gcc-Werror build.
* linux/aarch64/arch_regs.c (arm_pt_regs): Change uregs's type
from int to uint32_t.
Reported-by: Sergey Bolshakov <sbolshakov@altlinux.org>
Printing of ia32 syscalls on ia64 must have been broken for a long time.
Do not pretend that it works, print ia32 syscalls using printargs
instead.
* linux/ia64/syscallent.h: Remove all redefinitions of sys_* macros.
Stop including"../dummy.h". Include "../i386/syscallent.h" with
SYS_FUNC_NAME macro temporarily redirected to printargs.
As tests-m*32/Makefile.am files now refer to proper arch specific
directories, it's possible to relocate x32 <asm/stat.h> replacement
to its arch specific directory.
* linux/x86_64/asm_stat.h: Move ...
* linux/x32/asm_stat.h: ... here, remove x32 guard.
* Makefile.am (strace_SOURCES): Remove linux/x86_64/asm_stat.h.
Some old kernel headers, Ubuntu 14.04 in particular, provide
<asm/stat.h> editions that are completely wrong for x32.
Workaround this issue by providing a replacement.
* linux/x86_64/asm_stat.h: New file.
* linux/x32/asm_stat.h: Likewise.
* Makefile.am (strace_SOURCES): Add them.
Apparently, there are only two types of instruction pointer printers
depending on the architecture: those that print a register that was
fetched earlier, and those that fetch a register themselves using upeek.
With this change, architectures of the first type have ARCH_PC_REG
defined in their arch_regs.c file, architectures of the first type
have ARCH_PC_PEEK_ADDR defined there, and the common code in syscall.c
uses these macros to print the instruction pointer.
* Makefile.am (EXTRA_DIST): Remove linux/*/print_pc.c.
* linux/*/print_pc.c: Remove.
* linux/aarch64/arch_regs.c(ARCH_PC_REG): Define macro.
* linux/arc/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/arm/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/avr32/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/i386/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/ia64/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/metag/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/mips/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/nios2/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/or1k/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/powerpc64/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/powerpc/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/s390/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/s390x/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/sparc64/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/sparc/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/tile/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/x32/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/x86_64/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/alpha/arch_regs.c(ARCH_PC_PEEK_ADDR): Define macro.
* linux/bfin/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/crisv10/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/crisv32/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/hppa/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/m68k/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/microblaze/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/sh64/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/sh/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/xtensa/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* syscall.c (print_pc): Stop including "print_pc.c".
Use ARCH_PC_REG or ARCH_PC_PEEK_ADDR.
