From e2a8b1fd19fb3a8ead2ba28ddba27be19fa978b5 Mon Sep 17 00:00:00 2001 From: Matt Fischer Date: Thu, 31 Dec 2009 12:17:40 -0600 Subject: Added support for dladdr() dladdr() is a GNU extension function, which allows the caller to retrieve symbol information for a specified memory address. It is useful for things like generating backtrace information at runtime. Change-Id: I3a1def1a6c9c666d93e1e97b7d260dfa5b9b79a9 --- linker/linker.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'linker/linker.c') diff --git a/linker/linker.c b/linker/linker.c index 6d57cbc..f5294d9 100644 --- a/linker/linker.c +++ b/linker/linker.c @@ -538,6 +538,40 @@ Elf32_Sym *lookup(const char *name, soinfo **found) return 0; } +soinfo *find_containing_library(void *addr) +{ + soinfo *si; + + for(si = solist; si != NULL; si = si->next) + { + if((unsigned)addr >= si->base && (unsigned)addr - si->base < si->size) { + return si; + } + } + + return NULL; +} + +Elf32_Sym *find_containing_symbol(void *addr, soinfo *si) +{ + unsigned int i; + unsigned soaddr = (unsigned)addr - si->base; + + /* Search the library's symbol table for any defined symbol which + * contains this address */ + for(i=0; inchain; i++) { + Elf32_Sym *sym = &si->symtab[i]; + + if(sym->st_shndx != SHN_UNDEF && + soaddr >= sym->st_value && + soaddr < sym->st_value + sym->st_size) { + return sym; + } + } + + return NULL; +} + #if 0 static void dump(soinfo *si) { -- cgit v1.1