/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Subject to the GPL, version 2. */ #include #include #include #include "str.h" size_t strlcpy(char *dest, const char *src, size_t size) { size_t ret = strlen(src); if (size) { size_t len = (ret >= size) ? size - 1 : ret; memcpy(dest, src, len); dest[len] = '\0'; } return ret; } static inline int vslprintf(char *dst, size_t size, const char *fmt, va_list ap) { int ret; ret = vsnprintf(dst, size, fmt, ap); dst[size - 1] = '\0'; return ret; } int slprintf(char *dst, size_t size, const char *fmt, ...) { int ret; va_list ap; va_start(ap, fmt); ret = vslprintf(dst, size, fmt, ap); va_end(ap); return ret; } int slprintf_nocheck(char *dst, size_t size, const char *fmt, ...) { int ret; va_list ap; va_start(ap, fmt); ret = vslprintf(dst, size, fmt, ap); va_end(ap); return ret; } noinline void *xmemset(void *s, int c, size_t n) { size_t i; uint8_t *ptr = s; for (i = 0; i < n; ++i) ptr[i] = (uint8_t) c; return ptr; } char *strtrim_right(char *p, char c) { char *end; size_t len; len = strlen(p); while (*p && len) { end = p + len - 1; if (c == *end) *end = 0; else break; len = strlen(p); } return p; } t-rx-pump-back'>packet-rx-pump-back net-next plumbingsTobias Klauser

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author	Vineet Gupta <vgupta@synopsys.com>	2016-10-20 07:39:45 -0700
committer	Vineet Gupta <vgupta@synopsys.com>	2016-10-24 09:24:26 -0700
commit	91e040a79df73d371f70792f30380d4e44805250 (patch)
tree	b2732eadb60fc5575c465a81cc637a899330c1b5
parent	1dec78585328db00e33fb18dc1a6deed0e2095a5 (diff)

ARC: syscall for userspace cmpxchg assist

Older ARC700 cores (ARC750 specifically) lack instructions to implement atomic r-w-w. This is problematic for userspace libraries such as NPTL which need atomic primitives. So enable them by providing kernel assist. This is costly but really the only sane soluton (othern than tight spinning using the otherwise availiable atomic exchange EX instruciton). Good thing is there are only a few of these cores running Linux out in the wild. This only works on UP systems. Reviewed-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>