diff options
Diffstat (limited to 'gdb/m-vax.h')
| -rw-r--r-- | gdb/m-vax.h | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/gdb/m-vax.h b/gdb/m-vax.h index 906ed03..9f0c414 100644 --- a/gdb/m-vax.h +++ b/gdb/m-vax.h @@ -101,6 +101,18 @@ fix to bug-gdb@prep.ai.mit.edu. */ #define KERNEL_U_ADDR (0x80000000 - (UPAGES * NBPG)) +/* Same as offsetof macro from stddef.h (which 4.3BSD doesn't have). */ +#define my_offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) + +/* On the VAX, sigtramp is in the u area. Note that this definition + includes both the subroutine at u_pcb.pcb_sigc[3], and the + routine at u_pcb.pcb_sigc[0] (which does a calls to u_pcb.pcb_sigc[3]). + I think this is what we want. */ +#define IN_SIGTRAMP(pc, name) \ + ((pc) >= KERNEL_U_ADDR + my_offsetof (struct user, u_pcb.pcb_sigc[0]) \ + && (pc) < KERNEL_U_ADDR + my_offsetof (struct user, u_pcb.pcb_sigc[5]) \ + ) + /* Address of end of stack space. */ #define STACK_END_ADDR (0x80000000 - (UPAGES * NBPG)) @@ -285,13 +297,27 @@ fix to bug-gdb@prep.ai.mit.edu. */ #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 16, 4)) -/* Cannot find the AP register value directly from the FP value. - Must find it saved in the frame called by this one, or in the AP register - for the innermost frame. */ +/* Cannot find the AP register value directly from the FP value. Must + find it saved in the frame called by this one, or in the AP + register for the innermost frame. However, there is no way to tell + the difference between the innermost frame and a frame for which we + just don't know the frame that it called (e.g. "info frame + 0x7ffec789"). For the sake of argument suppose that the stack is + somewhat trashed (which is one reason that "info frame" exists). + So return Frame_unknown (indicating we don't know the address of + the arglist) if we don't know what frame this frame calls. */ +#define FRAME_ARGS_ADDRESS_CORRECT(fi) \ + (((fi)->next_frame \ + ? read_memory_integer ((fi)->next_frame + 8, 4) \ + : /* read_register (AP_REGNUM) */ Frame_unknown)) + +/* In most of GDB, getting the args address is too important to + just say "I don't know". This is sometimes wrong, but c'est + la vie. */ #define FRAME_ARGS_ADDRESS(fi) \ (((fi)->next_frame \ ? read_memory_integer ((fi)->next_frame + 8, 4) \ - : read_register (AP_REGNUM))) + : read_register (AP_REGNUM) /* Frame_unknown */)) #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) |