devel October 2019

devel@uclibc-ng.org

7 participants
6 discussions

fix PTRAVE_EVENT_SECCOMP typo in ptrace.h

by Joris Vink

Hi, This diff fixes a typo in the PTRACE_EVENT_SECCOMP event code. The typo itself was introduced in 2012 when syncing with glibc header files and was itself fixed in 2013 in the glibc headers. diff --git a/libc/sysdeps/linux/common/sys/ptrace.h b/libc/sysdeps/linux/common/sys/ptrace.h index 6b3c7b574..ebafe4e27 100644 --- a/libc/sysdeps/linux/common/sys/ptrace.h +++ b/libc/sysdeps/linux/common/sys/ptrace.h @@ -171,7 +171,7 @@ enum __ptrace_eventcodes PTRACE_EVENT_EXEC = 4, PTRACE_EVENT_VFORK_DONE = 5, PTRACE_EVENT_EXIT = 6, - PTRAVE_EVENT_SECCOMP = 7 + PTRACE_EVENT_SECCOMP = 7 }; /* Perform process tracing functions. REQUEST is one of the values .joris

3 years, 6 months

[PATCH RFC] Make __syscall_error return long, as expected by syscall() callers

by unixmania＠gmail.com

From: Carlos Santos <unixmania(a)gmail.com> The return type of syscall() is long so __syscall_error, which is jumped to by syscall handlers to stash an error number into errno, must return long too otherwhise it returs 4294967295L instead of -1L. For example, syscall for x86_64 is defined in libc/sysdeps/linux/x86_64/syscall.S as syscall: movq %rdi, %rax /* Syscall number -> rax. */ movq %rsi, %rdi /* shift arg1 - arg5. */ movq %rdx, %rsi movq %rcx, %rdx movq %r8, %r10 movq %r9, %r8 movq 8(%rsp),%r9 /* arg6 is on the stack. */ syscall /* Do the system call. */ cmpq $-4095, %rax /* Check %rax for error. */ jae __syscall_error /* Branch forward if it failed. */ ret /* Return to caller. */ In libc/sysdeps/linux/x86_64/__syscall_error.c, __syscall_error is defined as int __syscall_error(void) attribute_hidden; int __syscall_error(void) { register int err_no __asm__ ("%rcx"); __asm__ ("mov %rax, %rcx\n\t" "neg %rcx"); __set_errno(err_no); return -1; } So __syscall_error returns -1 as a 32-bit int in a 64-bit register, %rax (0x00000000ffffffff, whose decimal value is decimal 4294967295) and a test like this always returns false: if (syscall(number, ...) == -1) foo(); Fix the error by making __syscall_error return a long, like syscall(). The problem can be circumvented by the caller by coercing the returned value to int before comparing it to -1: if ((int) syscall(number, ...) == -1) foo(); The same problem probably occurs on other 64-bit systems but so far only x86_64 was tested, so this change must be considered experimental. Signed-off-by: Carlos Santos <unixmania(a)gmail.com> --- libc/sysdeps/linux/aarch64/__syscall_error.c | 4 ++-- libc/sysdeps/linux/alpha/__syscall_error.c | 2 +- libc/sysdeps/linux/arc/__syscall_error.c | 2 +- libc/sysdeps/linux/arm/__syscall_error.c | 4 ++-- libc/sysdeps/linux/csky/__syscall_error.c | 2 +- libc/sysdeps/linux/csky/clone.c | 2 +- libc/sysdeps/linux/frv/sysdep.c | 2 +- libc/sysdeps/linux/hppa/__syscall_error.c | 4 ++-- libc/sysdeps/linux/i386/__syscall_error.c | 4 ++-- libc/sysdeps/linux/ia64/__syscall_error.c | 4 ++-- libc/sysdeps/linux/m68k/__syscall_error.c | 4 ++-- libc/sysdeps/linux/metag/__syscall_error.c | 4 ++-- libc/sysdeps/linux/microblaze/__syscall_error.c | 4 ++-- libc/sysdeps/linux/mips/__syscall_error.c | 4 ++-- libc/sysdeps/linux/nds32/__syscall_error.c | 4 ++-- libc/sysdeps/linux/nios2/__syscall_error.c | 4 ++-- libc/sysdeps/linux/or1k/__syscall_error.c | 4 ++-- libc/sysdeps/linux/powerpc/__syscall_error.c | 4 ++-- libc/sysdeps/linux/riscv64/__syscall_error.c | 4 ++-- libc/sysdeps/linux/sparc/__syscall_error.c | 4 ++-- libc/sysdeps/linux/sparc64/__syscall_error.c | 4 ++-- libc/sysdeps/linux/tile/__syscall_error.c | 2 +- libc/sysdeps/linux/x86_64/__syscall_error.c | 4 ++-- libc/sysdeps/linux/xtensa/__syscall_error.c | 4 ++-- libpthread/nptl/sysdeps/unix/sysv/linux/__syscall_error.c | 4 ++-- 25 files changed, 44 insertions(+), 44 deletions(-) diff --git a/libc/sysdeps/linux/aarch64/__syscall_error.c b/libc/sysdeps/linux/aarch64/__syscall_error.c index 2b642e816..c682aae49 100644 --- a/libc/sysdeps/linux/aarch64/__syscall_error.c +++ b/libc/sysdeps/linux/aarch64/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libc/sysdeps/linux/alpha/__syscall_error.c b/libc/sysdeps/linux/alpha/__syscall_error.c index 7c081f3b5..c986e484d 100644 --- a/libc/sysdeps/linux/alpha/__syscall_error.c +++ b/libc/sysdeps/linux/alpha/__syscall_error.c @@ -8,7 +8,7 @@ /* This routine is jumped to by all the syscall handlers, to stash an error number into errno. */ -int attribute_hidden __syscall_error (void) +long attribute_hidden __syscall_error (void) { register int err_no __asm__("$0"); __set_errno (err_no); diff --git a/libc/sysdeps/linux/arc/__syscall_error.c b/libc/sysdeps/linux/arc/__syscall_error.c index 962d743e4..7f30485a8 100644 --- a/libc/sysdeps/linux/arc/__syscall_error.c +++ b/libc/sysdeps/linux/arc/__syscall_error.c @@ -8,7 +8,7 @@ #include <errno.h> #include <sys/syscall.h> -int __syscall_error(int err_no) +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libc/sysdeps/linux/arm/__syscall_error.c b/libc/sysdeps/linux/arm/__syscall_error.c index 2b642e816..c682aae49 100644 --- a/libc/sysdeps/linux/arm/__syscall_error.c +++ b/libc/sysdeps/linux/arm/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libc/sysdeps/linux/csky/__syscall_error.c b/libc/sysdeps/linux/csky/__syscall_error.c index cc1fb5977..c6a4a14eb 100644 --- a/libc/sysdeps/linux/csky/__syscall_error.c +++ b/libc/sysdeps/linux/csky/__syscall_error.c @@ -8,7 +8,7 @@ #include <errno.h> #include <features.h> -int __syscall_error(int err_no) +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libc/sysdeps/linux/csky/clone.c b/libc/sysdeps/linux/csky/clone.c index 991cb8962..f0fcc257b 100644 --- a/libc/sysdeps/linux/csky/clone.c +++ b/libc/sysdeps/linux/csky/clone.c @@ -9,7 +9,7 @@ #include <sysdep.h> #include <unistd.h> -extern int __syscall_error(int err_no); +extern long __syscall_error(int err_no); extern int __csky_clone ( int flags, diff --git a/libc/sysdeps/linux/frv/sysdep.c b/libc/sysdeps/linux/frv/sysdep.c index bfae12100..28beb418f 100644 --- a/libc/sysdeps/linux/frv/sysdep.c +++ b/libc/sysdeps/linux/frv/sysdep.c @@ -19,7 +19,7 @@ /* This routine is jumped to by all the syscall handlers, to stash an error number into errno. */ -int __syscall_error (int err_no) +long __syscall_error (int err_no) { __set_errno (-err_no); return -1; diff --git a/libc/sysdeps/linux/hppa/__syscall_error.c b/libc/sysdeps/linux/hppa/__syscall_error.c index 5e109a83b..af26cf6ab 100644 --- a/libc/sysdeps/linux/hppa/__syscall_error.c +++ b/libc/sysdeps/linux/hppa/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(err_no); return -1; diff --git a/libc/sysdeps/linux/i386/__syscall_error.c b/libc/sysdeps/linux/i386/__syscall_error.c index 36946bc6d..102ebbedb 100644 --- a/libc/sysdeps/linux/i386/__syscall_error.c +++ b/libc/sysdeps/linux/i386/__syscall_error.c @@ -25,8 +25,8 @@ #include <errno.h> #include <features.h> -int __syscall_error(void) attribute_hidden; -int __syscall_error(void) +long __syscall_error(void) attribute_hidden; +long __syscall_error(void) { register int eax __asm__ ("%eax"); int _errno = -eax; diff --git a/libc/sysdeps/linux/ia64/__syscall_error.c b/libc/sysdeps/linux/ia64/__syscall_error.c index 0727b2b53..cc2b13450 100644 --- a/libc/sysdeps/linux/ia64/__syscall_error.c +++ b/libc/sysdeps/linux/ia64/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(void) attribute_hidden; -int __syscall_error(void) +long __syscall_error(void) attribute_hidden; +long __syscall_error(void) { register int err_no __asm__("%r8"); __set_errno(err_no); diff --git a/libc/sysdeps/linux/m68k/__syscall_error.c b/libc/sysdeps/linux/m68k/__syscall_error.c index a29f6ffd6..2d2677521 100644 --- a/libc/sysdeps/linux/m68k/__syscall_error.c +++ b/libc/sysdeps/linux/m68k/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(void) attribute_hidden; -int __syscall_error(void) +long __syscall_error(void) attribute_hidden; +long __syscall_error(void) { register int err_no __asm__("%d0"); __set_errno(-err_no); diff --git a/libc/sysdeps/linux/metag/__syscall_error.c b/libc/sysdeps/linux/metag/__syscall_error.c index f97cd0126..3e82abe0d 100644 --- a/libc/sysdeps/linux/metag/__syscall_error.c +++ b/libc/sysdeps/linux/metag/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libc/sysdeps/linux/microblaze/__syscall_error.c b/libc/sysdeps/linux/microblaze/__syscall_error.c index 2b642e816..c682aae49 100644 --- a/libc/sysdeps/linux/microblaze/__syscall_error.c +++ b/libc/sysdeps/linux/microblaze/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libc/sysdeps/linux/mips/__syscall_error.c b/libc/sysdeps/linux/mips/__syscall_error.c index 5e109a83b..af26cf6ab 100644 --- a/libc/sysdeps/linux/mips/__syscall_error.c +++ b/libc/sysdeps/linux/mips/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(err_no); return -1; diff --git a/libc/sysdeps/linux/nds32/__syscall_error.c b/libc/sysdeps/linux/nds32/__syscall_error.c index 2aa6903e2..c8e6044a7 100644 --- a/libc/sysdeps/linux/nds32/__syscall_error.c +++ b/libc/sysdeps/linux/nds32/__syscall_error.c @@ -8,8 +8,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(err_no); return -1; diff --git a/libc/sysdeps/linux/nios2/__syscall_error.c b/libc/sysdeps/linux/nios2/__syscall_error.c index 2b642e816..c682aae49 100644 --- a/libc/sysdeps/linux/nios2/__syscall_error.c +++ b/libc/sysdeps/linux/nios2/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libc/sysdeps/linux/or1k/__syscall_error.c b/libc/sysdeps/linux/or1k/__syscall_error.c index 1b7e8a394..7d1e09d91 100644 --- a/libc/sysdeps/linux/or1k/__syscall_error.c +++ b/libc/sysdeps/linux/or1k/__syscall_error.c @@ -17,11 +17,11 @@ #include <errno.h> -int __syscall_error (int err_no); +long __syscall_error (int err_no); /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error (int err_no) +long __syscall_error (int err_no) { __set_errno (err_no); return -1; diff --git a/libc/sysdeps/linux/powerpc/__syscall_error.c b/libc/sysdeps/linux/powerpc/__syscall_error.c index 5e109a83b..af26cf6ab 100644 --- a/libc/sysdeps/linux/powerpc/__syscall_error.c +++ b/libc/sysdeps/linux/powerpc/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(err_no); return -1; diff --git a/libc/sysdeps/linux/riscv64/__syscall_error.c b/libc/sysdeps/linux/riscv64/__syscall_error.c index 2b642e816..c682aae49 100644 --- a/libc/sysdeps/linux/riscv64/__syscall_error.c +++ b/libc/sysdeps/linux/riscv64/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libc/sysdeps/linux/sparc/__syscall_error.c b/libc/sysdeps/linux/sparc/__syscall_error.c index 5e109a83b..af26cf6ab 100644 --- a/libc/sysdeps/linux/sparc/__syscall_error.c +++ b/libc/sysdeps/linux/sparc/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(err_no); return -1; diff --git a/libc/sysdeps/linux/sparc64/__syscall_error.c b/libc/sysdeps/linux/sparc64/__syscall_error.c index 5e109a83b..af26cf6ab 100644 --- a/libc/sysdeps/linux/sparc64/__syscall_error.c +++ b/libc/sysdeps/linux/sparc64/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(err_no); return -1; diff --git a/libc/sysdeps/linux/tile/__syscall_error.c b/libc/sysdeps/linux/tile/__syscall_error.c index a91fdff3a..31cab3799 100644 --- a/libc/sysdeps/linux/tile/__syscall_error.c +++ b/libc/sysdeps/linux/tile/__syscall_error.c @@ -6,7 +6,7 @@ #include <errno.h> #include <features.h> -int __syscall_error(int err_no) +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libc/sysdeps/linux/x86_64/__syscall_error.c b/libc/sysdeps/linux/x86_64/__syscall_error.c index 448f50983..7f0f388c4 100644 --- a/libc/sysdeps/linux/x86_64/__syscall_error.c +++ b/libc/sysdeps/linux/x86_64/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(void) attribute_hidden; -int __syscall_error(void) +long __syscall_error(void) attribute_hidden; +long __syscall_error(void) { register int err_no __asm__ ("%rcx"); __asm__ ("mov %rax, %rcx\n\t" diff --git a/libc/sysdeps/linux/xtensa/__syscall_error.c b/libc/sysdeps/linux/xtensa/__syscall_error.c index 2b642e816..c682aae49 100644 --- a/libc/sysdeps/linux/xtensa/__syscall_error.c +++ b/libc/sysdeps/linux/xtensa/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(-err_no); return -1; diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/__syscall_error.c b/libpthread/nptl/sysdeps/unix/sysv/linux/__syscall_error.c index 5e109a83b..af26cf6ab 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/__syscall_error.c +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/__syscall_error.c @@ -10,8 +10,8 @@ /* This routine is jumped to by all the syscall handlers, to stash * an error number into errno. */ -int __syscall_error(int err_no) attribute_hidden; -int __syscall_error(int err_no) +long __syscall_error(int err_no) attribute_hidden; +long __syscall_error(int err_no) { __set_errno(err_no); return -1; -- 2.18.1

3 years, 7 months

patch for c-sky

by Waldemar Brodkorb

Hi, what do you think about attached patch to unbreak c-sky for kernel 5.x and gcc 9.2. Tested in Qemu with static/shared builds. best regards Waldemar

3 years, 7 months

new release 1.0.32

by Waldemar Brodkorb

Hi, it is been a while, but the project is still not dead ;) We have a new release, feel free to update. best regards Waldemar

3 years, 7 months

xtensa failures in buildroot

by Waldemar Brodkorb

Hi Max, is attached patch okay for you? Fixes the recent br errors for uClibc-ng. best regards Waldemar

3 years, 8 months

[PATCH] or1k: Fix compiling with PIC and latest binutils use PLT for __syscall_error

by Stafford Horne

This symbol was causing a build failure with the new toolchain. It looks like it has always been wrong. The main issue was checking for PIC rather than __PIC__. Remove all PSEUDO_* macros and ther SYSCALL_ERROR_NAME macro as they are not needed by uclibc-ng, they are used in glibc for building up syscalls there, but not here. Fixes error: /opt/shorne/software/or1k-linux/bin/../lib/gcc/or1k-linux/9.0.1/../../../../or1k-linux/bin/ld: libc/libc_so.a(or1k_clone.os): pc-relative relocation against dynamic symbol __syscall_error /opt/shorne/software/or1k-linux/bin/../lib/gcc/or1k-linux/9.0.1/../../../../or1k-linux/bin/ld: final link failed: bad value Signed-off-by: Stafford Horne <shorne(a)gmail.com> --- libc/sysdeps/linux/or1k/or1k_clone.S | 8 +++++-- libc/sysdeps/linux/or1k/sysdep.h | 32 ---------------------------- 2 files changed, 6 insertions(+), 34 deletions(-) diff --git a/libc/sysdeps/linux/or1k/or1k_clone.S b/libc/sysdeps/linux/or1k/or1k_clone.S index a2c16ac9e..2de873a02 100644 --- a/libc/sysdeps/linux/or1k/or1k_clone.S +++ b/libc/sysdeps/linux/or1k/or1k_clone.S @@ -71,7 +71,11 @@ L(oldpid): l.ori r3, r11, 0 L(error): - l.j SYSCALL_ERROR_NAME +#ifdef __PIC__ + l.j plt(__syscall_error) +#else + l.j __syscall_error +#endif l.ori r3,r11,0 -PSEUDO_END (__or1k_clone) +END (__or1k_clone) diff --git a/libc/sysdeps/linux/or1k/sysdep.h b/libc/sysdeps/linux/or1k/sysdep.h index 4dba3f2a0..782981c55 100644 --- a/libc/sysdeps/linux/or1k/sysdep.h +++ b/libc/sysdeps/linux/or1k/sysdep.h @@ -43,38 +43,6 @@ License along with the GNU C Library; if not, see l.sys 1; \ l.nop -#define PSEUDO(name, syscall_name, args) \ - ENTRY (name); \ - DO_CALL(syscall_name); \ - /* if -4096 < ret < 0 holds, it's an error */ \ - l.sfgeui r11, 0xf001; \ - l.bf L(pseudo_end); \ - l.nop - -#define PSEUDO_NOERRNO(name, syscall_name, args) \ - ENTRY (name); \ - DO_CALL(syscall_name) - -#define PSEUDO_END(name) \ -L(pseudo_end): \ - l.j SYSCALL_ERROR_NAME; \ - l.ori r3,r11,0; \ - END (name) - -#define PSEUDO_END_NOERRNO(name) \ - END (name) - -#ifndef PIC -/* For static code, on error jump to __syscall_error directly. */ -# define SYSCALL_ERROR_NAME __syscall_error -#elif NOT_IN_libc -/* Use the internal name for libc/libpthread shared objects. */ -# define SYSCALL_ERROR_NAME __GI___syscall_error -#else -/* Otherwise, on error do a full PLT jump. */ -# define SYSCALL_ERROR_NAME plt(__syscall_error) -#endif - /* Make use of .size directive. */ #define ASM_SIZE_DIRECTIVE(name) .size name,.-name; -- 2.21.0

3 years, 8 months

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