diff options
Diffstat (limited to 'gdb/irix4-nat.c')
| -rw-r--r-- | gdb/irix4-nat.c | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/gdb/irix4-nat.c b/gdb/irix4-nat.c index 5127bc2..97b63dc 100644 --- a/gdb/irix4-nat.c +++ b/gdb/irix4-nat.c @@ -1,7 +1,8 @@ -/* Target-dependent code for the MIPS architecture, for GDB, the GNU Debugger. +/* Native support for the SGI Iris running IRIX version 4, for GDB. Copyright 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc. Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. + Implemented for Irix 4.x by Garrett A. Wollman. This file is part of GDB. @@ -21,12 +22,13 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "defs.h" -/* - * Implemented for Irix 4.x by Garrett A. Wollman - */ - #include <sys/time.h> #include <sys/procfs.h> +#include <setjmp.h> /* For JB_XXX. */ + +/* Size of elements in jmpbuf */ + +#define JB_ELEMENT_SIZE 4 typedef unsigned int greg_t; /* why isn't this defined? */ @@ -124,3 +126,26 @@ fill_fpregset (fpregsetp, regno) if ((regno == -1) || (regno == FCRCS_REGNUM)) fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(FCRCS_REGNUM)]; } + + +/* Figure out where the longjmp will land. + We expect the first arg to be a pointer to the jmp_buf structure from which + we extract the pc (JB_PC) that we will land at. The pc is copied into PC. + This routine returns true on success. */ + +int +get_longjmp_target(pc) + CORE_ADDR *pc; +{ + CORE_ADDR jb_addr; + + jb_addr = read_register(A0_REGNUM); + + if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, pc, + sizeof(CORE_ADDR))) + return 0; + + SWAP_TARGET_AND_HOST(pc, sizeof(CORE_ADDR)); + + return 1; +} |