#include #include #include #include "util.h" #include "debug.h" #include "symbol.h" #include "demangle-java.h" enum { MODE_PREFIX = 0, MODE_CLASS = 1, MODE_FUNC = 2, MODE_TYPE = 3, MODE_CTYPE = 3, /* class arg */ }; #define BASE_ENT(c, n) [c - 'A']=n static const char *base_types['Z' - 'A' + 1] = { BASE_ENT('B', "byte" ), BASE_ENT('C', "char" ), BASE_ENT('D', "double" ), BASE_ENT('F', "float" ), BASE_ENT('I', "int" ), BASE_ENT('J', "long" ), BASE_ENT('S', "short" ), BASE_ENT('Z', "bool" ), }; /* * demangle Java symbol between str and end positions and stores * up to maxlen characters into buf. The parser starts in mode. * * Use MODE_PREFIX to process entire prototype till end position * Use MODE_TYPE to process return type if str starts on return type char * * Return: * success: buf * error : NULL */ static char * __demangle_java_sym(const char *str, const char *end, char *buf, int maxlen, int mode) { int rlen = 0; int array = 0; int narg = 0; const char *q; if (!end) end = str + strlen(str); for (q = str; q != end; q++) { if (rlen == (maxlen - 1)) break; switch (*q) { case 'L': if (mode == MODE_PREFIX || mode == MODE_CTYPE) { if (mode == MODE_CTYPE) { if (narg) rlen += scnprintf(buf + rlen, maxlen - rlen, ", "); narg++; } rlen += scnprintf(buf + rlen, maxlen - rlen, "class "); if (mode == MODE_PREFIX) mode = MODE_CLASS; } else buf[rlen++] = *q; break; case 'B': case 'C': case 'D': case 'F': case 'I': case 'J': case 'S': case 'Z': if (mode == MODE_TYPE) { if (narg) rlen += scnprintf(buf + rlen, maxlen - rlen, ", "); rlen += scnprintf(buf + rlen, maxlen - rlen, "%s", base_types[*q - 'A']); while (array--) rlen += scnprintf(buf + rlen, maxlen - rlen, "[]"); array = 0; narg++; } else buf[rlen++] = *q; break; case 'V': if (mode == MODE_TYPE) { rlen += scnprintf(buf + rlen, maxlen - rlen, "void"); while (array--) rlen += scnprintf(buf + rlen, maxlen - rlen, "[]"); array = 0; } else buf[rlen++] = *q; break; case '[': if (mode != MODE_TYPE) goto error; array++; break; case '(': if (mode != MODE_FUNC) goto error; buf[rlen++] = *q; mode = MODE_TYPE; break; case ')': if (mode != MODE_TYPE) goto error; buf[rlen++] = *q; narg = 0; break; case ';': if (mode != MODE_CLASS && mode != MODE_CTYPE) goto error; /* safe because at least one other char to process */ if (isalpha(*(q + 1))) rlen += scnprintf(buf + rlen, maxlen - rlen, "."); if (mode == MODE_CLASS) mode = MODE_FUNC; else if (mode == MODE_CTYPE) mode = MODE_TYPE; break; case '/': if (mode != MODE_CLASS && mode != MODE_CTYPE) goto error; rlen += scnprintf(buf + rlen, maxlen - rlen, "."); break; default : buf[rlen++] = *q; } } buf[rlen] = '\0'; return buf; error: return NULL; } /* * Demangle Java function signature (openJDK, not GCJ) * input: * str: string to parse. String is not modified * flags: comobination of JAVA_DEMANGLE_* flags to modify demangling * return: * if input can be demangled, then a newly allocated string is returned. * if input cannot be demangled, then NULL is returned * * Note: caller is responsible for freeing demangled string */ char * java_demangle_sym(const char *str, int flags) { char *buf, *ptr; char *p; size_t len, l1 = 0; if (!str) return NULL; /* find start of retunr type */ p = strrchr(str, ')'); if (!p) return NULL; /* * expansion factor estimated to 3x */ len = strlen(str) * 3 + 1; buf = malloc(len); if (!buf) return NULL; buf[0] = '\0'; if (!(flags & JAVA_DEMANGLE_NORET)) { /* * get return type first */ ptr = __demangle_java_sym(p + 1, NULL, buf, len, MODE_TYPE); if (!ptr) goto error; /* add space between return type and function prototype */ l1 = strlen(buf); buf[l1++] = ' '; } /* process function up to return type */ ptr = __demangle_java_sym(str, p + 1, buf + l1, len - l1, MODE_PREFIX); if (!ptr) goto error; return buf; error: free(buf); return NULL; } space:mode:
authorJiri Kosina <jkosina@suse.cz>2017-01-27 22:25:52 +0000
committerIngo Molnar <mingo@kernel.org>2017-01-28 09:18:56 +0100
commitbf29bddf0417a4783da3b24e8c9e017ac649326f (patch)
tree54a05a4883b73f80e4e1d8c4b15750aa01c39932 /net/ax25/ax25_route.c
parent883af14e67e8b8702b5560aa64c888c0cd0bd66c (diff)
x86/efi: Always map the first physical page into the EFI pagetables
Commit: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") stopped creating 1:1 mappings for all RAM, when running in native 64-bit mode. It turns out though that there are 64-bit EFI implementations in the wild (this particular problem has been reported on a Lenovo Yoga 710-11IKB), which still make use of the first physical page for their own private use, even though they explicitly mark it EFI_CONVENTIONAL_MEMORY in the memory map. In case there is no mapping for this particular frame in the EFI pagetables, as soon as firmware tries to make use of it, a triple fault occurs and the system reboots (in case of the Yoga 710-11IKB this is very early during bootup). Fix that by always mapping the first page of physical memory into the EFI pagetables. We're free to hand this page to the BIOS, as trim_bios_range() will reserve the first page and isolate it away from memory allocators anyway. Note that just reverting 129766708 alone is not enough on v4.9-rc1+ to fix the regression on affected hardware, as this commit: ab72a27da ("x86/efi: Consolidate region mapping logic") later made the first physical frame not to be mapped anyway. Reported-by: Hanka Pavlikova <hanka@ucw.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Laura Abbott <labbott@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vojtech Pavlik <vojtech@ucw.cz> Cc: Waiman Long <waiman.long@hpe.com> Cc: linux-efi@vger.kernel.org Cc: stable@kernel.org # v4.8+ Fixes: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") Link: http://lkml.kernel.org/r/20170127222552.22336-1-matt@codeblueprint.co.uk [ Tidied up the changelog and the comment. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/ax25/ax25_route.c')