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* hppa-tdep.c (skip_trampoline_code): Handle shared library import

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trampolines.
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Jeff Law 1994-11-16 07:21:06 +00:00
parent 2df1ea3d5b
commit f32fc5f979
2 changed files with 44 additions and 0 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
Wed Nov 16 00:12:21 1994 Jeff Law (law@snake.cs.utah.edu)
* hppa-tdep.c (skip_trampoline_code): Handle shared library import
trampolines.
Tue Nov 15 16:18:52 1994 Kung Hsu (kung@mexican.cygnus.com)
* c-exp.y (yylex): Fix a bug in template scanning.

39
gdb/hppa-tdep.c
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@ -1684,6 +1684,45 @@ skip_trampoline_code (pc, name)
}
}
/* Does it look like a be 0(sr0,%r21)? That's the branch from an
import stub to an export stub.
It is impossible to determine the target of the branch via
simple examination of instructions and/or data (consider
that the address in the plabel may be the address of the
bind-on-reference routine in the dynamic loader).
So we have try an alternative approach.
Get the name of the symbol at our current location; it should
be a stub symbol with the same name as the symbol in the
shared library.
Then lookup a minimal symbol with the same name; we should
get the minimal symbol for the target routine in the shared
library as those take precedence of import/export stubs. */
if (curr_inst == 0xe2a00000)
{
struct minimal_symbol *stubsym, *libsym;
stubsym = lookup_minimal_symbol_by_pc (loc);
if (stubsym == NULL)
{
warning ("Unable to find symbol for 0x%x", loc);
return orig_pc == pc ? 0 : pc & ~0x3;
}
libsym = lookup_minimal_symbol (SYMBOL_NAME (stubsym), NULL);
if (libsym == NULL)
{
warning ("Unable to find library symbol for %s\n",
SYMBOL_NAME (stubsym));
return orig_pc == pc ? 0 : pc & ~0x3;
}
return SYMBOL_VALUE (libsym);
}
/* Does it look like bl X,%rp or bl X,%r0? Another way to do a
branch from the stub to the actual function. */
else if ((curr_inst & 0xffe0e000) == 0xe8400000