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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-11-18 19:33:51 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-11-18 19:33:51 +1100 |
| commit | c38c2e8d08e03e905b72334747a9f8795f3526c2 (patch) | |
| tree | 94a7e5ec6124998eee1d1a27577370b03304c4e6 /core/utils.c | |
| parent | 94796c825b0708c8c86e7135d60c435fc3fd00a5 (diff) | |
| download | skiboot-c38c2e8d08e03e905b72334747a9f8795f3526c2.zip skiboot-c38c2e8d08e03e905b72334747a9f8795f3526c2.tar.gz skiboot-c38c2e8d08e03e905b72334747a9f8795f3526c2.tar.bz2 | |
Add symbolic backtraces and expose skiboot map to Linux
We use a double link technique, doing a first pass with a .o containing
a dummy symbol map, then re-linking with a new .o
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'core/utils.c')
| -rw-r--r-- | core/utils.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/core/utils.c b/core/utils.c index 63046fc..1a81ae2 100644 --- a/core/utils.c +++ b/core/utils.c @@ -68,3 +68,30 @@ char __attrconst tohex(uint8_t nibble) return __tohex[nibble]; } +unsigned long get_symbol(unsigned long addr, char **sym, char **sym_end) +{ + unsigned long prev = 0, next; + char *psym = NULL, *p = __sym_map_start; + + *sym = *sym_end = NULL; + while(p < __sym_map_end) { + next = strtoul(p, &p, 16) | SKIBOOT_BASE; + if (next > addr && prev <= addr) { + p = psym + 3;; + if (p >= __sym_map_end) + return 0; + *sym = p; + while(p < __sym_map_end && *p != 10) + p++; + *sym_end = p; + return prev; + } + prev = next; + psym = p; + while(p < __sym_map_end && *p != 10) + p++; + p++; + } + return 0; +} + |