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Mostly merged in changes from IBM (Metin); see ChangeLog.

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This commit is contained in:
Per Bothner
1992-03-13 01:42:25 +00:00
parent 8a62f15528
commit 507e40040c
5 changed files with 388 additions and 90 deletions
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30
gdb/minsyms.c
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@@ -116,7 +116,7 @@ iterate_over_msymbols (func, arg1, arg2, arg3)
particular objfile and the search is limited to that objfile. Returns
a pointer to the minimal symbol that matches, or NULL if no match is found.
Note: One instance where their may be duplicate minimal symbols with
Note: One instance where there may be duplicate minimal symbols with
the same name is when the symbol tables for a shared library and the
symbol tables for an executable contain global symbols with the same
names (the dynamic linker deals with the duplication). */
@@ -129,6 +129,9 @@ lookup_minimal_symbol (name, objf)
struct objfile *objfile;
struct minimal_symbol *msymbol;
struct minimal_symbol *found_symbol = NULL;
#ifdef IBM6000
struct minimal_symbol *trampoline_symbol = NULL;
#endif
for (objfile = object_files;
objfile != NULL && found_symbol == NULL;
@@ -143,11 +146,36 @@ lookup_minimal_symbol (name, objf)
{
if (strcmp (msymbol -> name, name) == 0)
{
/* I *think* all platforms using shared libraries (and trampoline code)
* will suffer this problem. Consider a case where there are 5 shared
* libraries, each referencing `foo' with a trampoline entry. When someone
* wants to put a breakpoint on `foo' and the only info we have is minimal
* symbol vector, we want to use the real `foo', rather than one of those
* trampoline entries. MGO */
#ifdef IBM6000
/* If a trampoline symbol is found, we prefer to keep looking
for the *real* symbol. If the actual symbol not found,
then we'll use the trampoline entry. Sorry for the machine
dependent code here, but I hope this will benefit other
platforms as well. For trampoline entries, we used mst_unknown
earlier. Perhaps we should define a `mst_trampoline' type?? */
if (msymbol->type != mst_unknown)
found_symbol = msymbol;
else if (msymbol->type == mst_unknown && !trampoline_symbol)
trampoline_symbol = msymbol;
#else
found_symbol = msymbol;
#endif
}
}
}
}
#ifdef IBM6000
return found_symbol ? found_symbol : trampoline_symbol;
#endif
return (found_symbol);
}