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* hppa-tdep.c (hppa_fix_call_dummy): Use an alternate method for

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calling import stubs for functions in shared libraries.
This commit is contained in:
Jeff Law 1994-03-30 07:03:01 +00:00
parent 58cda66eeb
commit 19cd0c1f75
2 changed files with 35 additions and 0 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
Tue Mar 29 23:01:33 1994 Jeffrey A. Law (law@snake.cs.utah.edu)
* hppa-tdep.c (hppa_fix_call_dummy): Use an alternate method for
calling import stubs for functions in shared libraries.
Tue Mar 29 21:14:04 1994 Per Bothner (bothner@kalessin.cygnus.com)
* ch-exp.y: Implement SIZE(mode_name) and SIZE(expression).

30
gdb/hppa-tdep.c
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@ -1056,6 +1056,7 @@ hppa_fix_call_dummy (dummy, pc, fun, nargs, args, type, gcc_p)
CORE_ADDR dyncall_addr, sr4export_addr;
struct minimal_symbol *msymbol;
int flags = read_register (FLAGS_REGNUM);
struct unwind_table_entry *u;
msymbol = lookup_minimal_symbol ("$$dyncall", (struct objfile *) NULL);
if (msymbol == NULL)
@ -1063,6 +1064,35 @@ hppa_fix_call_dummy (dummy, pc, fun, nargs, args, type, gcc_p)
dyncall_addr = SYMBOL_VALUE_ADDRESS (msymbol);
/* If we are calling an import stub (eg calling into a dynamic library)
then have sr4export call the magic __d_plt_call routine which is linked
in from end.o. (You can't use _sr4export to call the import stub as
the value in sp-24 will get fried and you end up returning to the
wrong location. You can't call the import stub directly as the code
to bind the PLT entry to a function can't return to a stack address.) */
u = find_unwind_entry (fun);
if (u && u->stub_type == IMPORT)
{
CORE_ADDR new_fun;
msymbol = lookup_minimal_symbol ("__d_plt_call", (struct objfile *) NULL);
if (msymbol == NULL)
error ("Can't find an address for __d_plt_call trampoline");
/* This is where sr4export will jump to. */
new_fun = SYMBOL_VALUE_ADDRESS (msymbol);
/* We have to store the address of the stub in __shlib_funcptr. */
msymbol = lookup_minimal_symbol ("__shlib_funcptr",
(struct objfile *)NULL);
if (msymbol == NULL)
error ("Can't find an address for __shlib_funcptr");
target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol), (char *)&fun, 4);
fun = new_fun;
}
/* We still need sr4export's address too. */
msymbol = lookup_minimal_symbol ("_sr4export", (struct objfile *) NULL);
if (msymbol == NULL)
error ("Can't find an address for _sr4export trampoline");