diff options
Diffstat (limited to 'gdb/hp300bsd-dep.c')
| -rw-r--r-- | gdb/hp300bsd-dep.c | 77 |
1 files changed, 59 insertions, 18 deletions
diff --git a/gdb/hp300bsd-dep.c b/gdb/hp300bsd-dep.c index 71fdb95..7199339 100644 --- a/gdb/hp300bsd-dep.c +++ b/gdb/hp300bsd-dep.c @@ -17,6 +17,7 @@ You should have received a copy of the GNU General Public License along with GDB; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ +#include <stdio.h> #include "defs.h" #include "param.h" #include "frame.h" @@ -26,13 +27,11 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <sys/types.h> #endif -#include <stdio.h> #include <sys/param.h> #include <sys/dir.h> #include <signal.h> -#include <sys/user.h> #include <sys/ioctl.h> -#include <fcntl.h> +/* #include <fcntl.h> Can we live without this? */ #ifdef COFF_ENCAPSULATE #include "a.out.encap.h" @@ -42,10 +41,14 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef N_SET_MAGIC #define N_SET_MAGIC(exec, val) ((exec).a_magic = (val)) #endif + +#include <sys/user.h> /* After a.out.h */ #include <sys/file.h> #include <sys/stat.h> #include <sys/ptrace.h> +CORE_ADDR kernel_u_addr; + extern int errno; /* This function simply calls ptrace with the given arguments. @@ -200,9 +203,17 @@ read_inferior_memory (memaddr, myaddr, len) for (i = 0; i < count; i++, addr += sizeof (int)) { errno = 0; +#if 0 + /* This is now done by read_memory, because when this function did it, + reading a byte or short int hardware port read whole longs, causing + serious side effects + such as bus errors and unexpected hardware operation. This would + also be a problem with ptrace if the inferior process could read + or write hardware registers, but that's not usually the case. */ if (remote_debugging) buffer[i] = remote_fetch_word (addr); else +#endif buffer[i] = ptrace (PT_READ_I, inferior_pid, addr, 0); if (errno) return errno; @@ -275,11 +286,6 @@ write_inferior_memory (memaddr, myaddr, len) /* Work with core dump and executable files, for GDB. This code would be in core.c if it weren't machine-dependent. */ -/* Recognize COFF format systems because a.out.h defines AOUTHDR. */ -#ifdef AOUTHDR -#define COFF_FORMAT -#endif - #ifndef N_TXTADDR #define N_TXTADDR(hdr) 0 #endif /* no N_TXTADDR */ @@ -296,8 +302,10 @@ write_inferior_memory (memaddr, myaddr, len) #endif #ifndef COFF_FORMAT +#ifndef AOUTHDR #define AOUTHDR struct exec #endif +#endif extern char *sys_siglist[]; @@ -413,18 +421,30 @@ core_file_command (filename, from_tty) { struct user u; - int reg_offset; + unsigned int reg_offset; val = myread (corechan, &u, sizeof u); if (val < 0) - perror_with_name (filename); + perror_with_name ("Not a core file: reading upage"); + if (val != sizeof u) + error ("Not a core file: could only read %d bytes", val); + + /* We are depending on exec_file_command having been called + previously to set exec_data_start. Since the executable + and the core file share the same text segment, the address + of the data segment will be the same in both. */ data_start = exec_data_start; data_end = data_start + NBPG * u.u_dsize; stack_start = stack_end - NBPG * u.u_ssize; data_offset = NBPG * UPAGES; stack_offset = NBPG * (UPAGES + u.u_dsize); - reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR; + + /* Some machines put an absolute address in here and some put + the offset in the upage of the regs. */ + reg_offset = (int) u.u_ar0; + if (reg_offset > NBPG * UPAGES) + reg_offset -= KERNEL_U_ADDR; /* I don't know where to find this info. So, for now, mark it as not available. */ @@ -441,12 +461,17 @@ core_file_command (filename, from_tty) char buf[MAX_REGISTER_RAW_SIZE]; val = lseek (corechan, register_addr (regno, reg_offset), 0); - if (val < 0) - perror_with_name (filename); + if (val < 0 + || (val = myread (corechan, buf, sizeof buf)) < 0) + { + char * buffer = (char *) alloca (strlen (reg_names[regno]) + + 30); + strcpy (buffer, "Reading register "); + strcat (buffer, reg_names[regno]); + + perror_with_name (buffer); + } - val = myread (corechan, buf, sizeof buf); - if (val < 0) - perror_with_name (filename); supply_register (regno, buf); } } @@ -515,10 +540,12 @@ exec_file_command (filename, from_tty) if (read_aout_hdr (execchan, &exec_aouthdr, aout_hdrsize) < 0) error ("\"%s\": can't read optional aouthdr", execfile); - if (read_section_hdr (execchan, _TEXT, &text_hdr, num_sections) < 0) + if (read_section_hdr (execchan, _TEXT, &text_hdr, num_sections, + aout_hdrsize) < 0) error ("\"%s\": can't read text section header", execfile); - if (read_section_hdr (execchan, _DATA, &data_hdr, num_sections) < 0) + if (read_section_hdr (execchan, _DATA, &data_hdr, num_sections, + aout_hdrsize) < 0) error ("\"%s\": can't read data section header", execfile); text_start = exec_aouthdr.text_start; @@ -569,3 +596,17 @@ exec_file_command (filename, from_tty) if (exec_file_display_hook) (*exec_file_display_hook) (filename); } + +void +_initialize_hp300bsd_dep () +{ + struct nlist names[2]; + + /* Get the address of the u area. */ + names[0].n_un.n_name = "_u"; + names[1].n_un.n_name = NULL; + if (nlist ("/vmunix", names) == 0) + kernel_u_addr = names[0].n_value; + else + kernel_u_addr = 0x00917000; +} |