diff options
Diffstat (limited to 'gdb/symtab.h')
| -rw-r--r-- | gdb/symtab.h | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/gdb/symtab.h b/gdb/symtab.h index 82ad961..f04407d 100644 --- a/gdb/symtab.h +++ b/gdb/symtab.h @@ -448,10 +448,7 @@ enum address_class LOC_ARG, - /* Value address is at SYMBOL_VALUE offset in arglist. Currently - this is used for C++ references (and presumably will be used for - Pascal VAR parameters), and is only dereferenced in certain - contexts. */ + /* Value address is at SYMBOL_VALUE offset in arglist. */ LOC_REF_ARG, @@ -462,13 +459,20 @@ enum address_class FRAME_LOCALS_ADDRESS), and an is_argument flag. For some symbol formats (stabs, for some compilers at least), - gdb generates a LOC_ARG and a LOC_REGISTER rather than a LOC_REGPARM. - This is because that's what the compiler does, but perhaps it would - be better if the symbol-reading code detected this (is it possible?) - and generated a LOC_REGPARM. */ + the compiler generates two symbols, an argument and a register. + In some cases we combine them to a single LOC_REGPARM in symbol + reading, but I'm not sure whether we do for all cases (I'm thinking + of when it's passed on the stack and then loaded into a register). */ LOC_REGPARM, + /* Value is in specified register. Just like LOC_REGPARM except the + register holds the address of the argument instead of the argument + itself. This is currently used for the passing of structs and unions + on sparc and hppa. */ + + LOC_REGPARM_ADDR, + /* Value is a local variable at SYMBOL_VALUE offset in stack frame. */ LOC_LOCAL, |