From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ryan.Kyser@jci.com (Ryan.Kyser@jci.com) Date: Tue, 10 Apr 2012 17:41:19 -0400 Subject: [lttng-dev] ARM syscall problems Message-ID: I have gotten most of the ARM syscall tracing to work, but I have two problems. 1.) My override syscalls don't look quite right (see babeltrace snippet below). I have overriden these in the file instrumentation/syscalls/headers/arm-32-syscalls-2.6.38_integers_override.h (see below for contents of file). I based each of the SC_TRACE_EVENTmacros on the function declaration of each respective syscall. These declarations can be viewed below the babeltrace snippet. If anyone has any suggestions on what I'm doing wrong, I would appreciate it. 2.) I'm seeing a sys_unknown with a suspicious NR ID of 983045. Any ideas on how to further debug this problem? [19:01:09.009343858] (+0.000020500) sys_unknown: { 0 }, { id = 983045, args = [ [0] = 715846848, [1] = 715848600, [2] = 716677200, [3] = 715846848, [4] = 716677200, [5] = 1 ] } // snippet from babeltrace [19:01:41.881449470] (+0.000009560) sys_mmap2: { 0 }, { addr = 0x0, len = 0xA00000, prot = 0x3, flags = 0x122, fd = 0xFFFFFFFF, pgoff = 0x0 } [19:01:41.883759076] (+0.000002848) sys_mmap2: { 0 }, { addr = 0x0, len = 0xA00000, prot = 0x3, flags = 0x122, fd = 0xFFFFFFFF, pgoff = 0x0 } [19:01:41.885699591] (+0.000002394) sys_mmap2: { 1 }, { addr = 0x0, len = 0xA00000, prot = 0x3, flags = 0x122, fd = 0xFFFFFFFF, pgoff = 0x0 } [19:01:41.891235228] (+0.000067409) sys_sync_file_range2: { 0 }, { fd = 0x1C, offset = 0x2, nbytes = 0x400000000, flags = 0x0 } [19:01:41.891582288] (+0.000002818) sys_sync_file_range2: { 0 }, { fd = 0x1C, offset = 0x100000000002, nbytes = 0x400000000, flags = 0x0 } [19:01:41.891618122] (+0.000002319) sys_sync_file_range2: { 0 }, { fd = 0x1C, offset = 0x7, nbytes = 0x400000000, flags = 0x0 } [19:01:41.924569379] (+0.000014803) sys_arm_fadvise64_64: { 0 }, { fd = 0x1C, advice = 0x4, offset = 0x400000000, len = 0xF1FF3ED800000000 } [19:01:41.924714197] (+0.000003151) sys_sync_file_range2: { 0 }, { fd = 0x1C, offset = 0x200000000002, nbytes = 0x400000000, flags = 0x0 } [19:01:41.924758425] (+0.000002137) sys_sync_file_range2: { 0 }, { fd = 0x1C, offset = 0x100000000007, nbytes = 0x400000000, flags = 0x0 } [19:01:41.924768591] (+0.000002909) sys_arm_fadvise64_64: { 0 }, { fd = 0x1C, advice = 0x4, offset = 0x400000000, len = 0xF1FF3ED800000000 } // end snippet // declaration from include/asm-generic/syscalls.h asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff); // declaration from arch/arm/kernel/sys_arm.c asmlinkage long sys_arm_fadvise64_64(int fd, int advice, loff_t offset, loff_t len) { return sys_fadvise64_64(fd, offset, len, advice); } // declaration from fs/sync.c SYSCALL_DEFINE(sync_file_range2)(int fd, unsigned int flags, loff_t offset, loff_t nbytes) { return sys_sync_file_range(fd, offset, nbytes, flags); } // arm-32-syscalls-2.6.38_integers_override.h .... #define OVERRIDE_TABLE_32_sys_mmap2 #define OVERRIDE_TABLE_32_sys_arm_fadvise64_64 #define OVERRIDE_TABLE_32_sys_sync_file_range2 #ifndef CREATE_SYSCALL_TABLE SC_TRACE_EVENT(sys_mmap2, TP_PROTO(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff), TP_ARGS(addr, len, prot, flags, fd, pgoff), TP_STRUCT__entry( __field_hex(unsigned long, addr) __field_hex(unsigned long, len) __field_hex(unsigned long, prot) __field_hex(unsigned long, flags) __field_hex(unsigned long, fd) __field_hex(unsigned long, pgoff)), TP_fast_assign( tp_assign(addr, addr) tp_assign(len, len) tp_assign(prot, prot) tp_assign(flags, flags) tp_assign(fd, fd) tp_assign(pgoff, pgoff)), TP_printk() ) SC_TRACE_EVENT(sys_arm_fadvise64_64, TP_PROTO(int fd, int advice, loff_t offset, loff_t len), TP_ARGS(fd, advice, offset, len), TP_STRUCT__entry( __field_hex(int, fd) __field_hex(int, advice) __field_hex(loff_t, offset) __field_hex(loff_t, len)), TP_fast_assign( tp_assign(fd, fd) tp_assign(advice, advice) tp_assign(offset, offset) tp_assign(len, len)), TP_printk() ) SC_TRACE_EVENT(sys_sync_file_range2, TP_PROTO(int fd, loff_t offset, loff_t nbytes, unsigned int flags), TP_ARGS(fd, offset, nbytes, flags), TP_STRUCT__entry( __field_hex(int, fd) __field_hex(loff_t, offset) __field_hex(loff_t, nbytes) __field_hex(unsigned int, flags)), TP_fast_assign( tp_assign(fd, fd) tp_assign(offset, offset) tp_assign(nbytes, nbytes) tp_assign(flags, flags)), TP_printk() ) #else /* CREATE_SYSCALL_TABLE */ #define OVERRIDE_TABLE_32_sys_mmap2 TRACE_SYSCALL_TABLE(sys_mmap2, sys_mmap2, 192, 6) #define OVERRIDE_TABLE_32_sys_arm_fadvise64_64 TRACE_SYSCALL_TABLE(sys_arm_fadvise64_64, sys_arm_fadvise64_64, 270, 4) #define OVERRIDE_TABLE_32_sys_sync_file_range2 TRACE_SYSCALL_TABLE(sys_sync_file_range2, sys_sync_file_range2, 341, 4) #endif /* CREATE_SYSCALL_TABLE */ Thank you, Ryan Kyser