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* arm-xdep.c: Move native-specific code to here from arm-tdep.c.

Browse Source 
* arm-tdep.c (arm_apcs_32): New global.
	(arm_addr_bits_remove, arm_saved_pc_after_call,
 	arm_push_dummy_frame, arm_pop_frame): New functions.
	(arm_skip_prologue): Updated version from Richard Earnshaw.
	(_initialize_arm_tdep): Add set/show "apcs32".
	* config/arm/tm-arm.h (ADDR_BITS_REMOVE): Call
	arm_addr_bits_remove.
	(SAVED_PC_AFTER_CALL): Call arm_saved_pc_after_call.
	(frame_find_saved_regs): Declare properly.
	(PUSH_DUMMY_FRAME): Call arm_push_dummy_frame.
	(POP_FRAME): Call arm_pop_frame, use ADDR_BITS_REMOVE instead of
	explicit mask.
	* config/arm/nm-arm.h: New file.
	* config/arm/xm-arm.h (KERNEL_U_ADDR, FETCH_INFERIOR_REGISTERS):
	Move definitions to nm-arm.h.
	* config/arm/arm.mh (NAT_FILE): Define.
PR 8941
This commit is contained in:
Stan Shebs
1996-04-05 04:14:11 +00:00
parent 67c1413d7f
commit 72c9954b87
5 changed files with 794 additions and 369 deletions
Download Patch File Download Diff File Expand all files Collapse all files

283
gdb/arm-xdep.c
View File

@ -274,3 +274,286 @@ core_file_command (filename, from_tty)
else if (from_tty)
printf ("No core file now.\n");
}
#if 0
/* Work with core dump and executable files, for GDB.
This code would be in corefile.c if it weren't machine-dependent. */
/* Structure to describe the chain of shared libraries used
by the execfile.
e.g. prog shares Xt which shares X11 which shares c. */
struct shared_library {
struct exec_header header;
char name[SHLIBLEN];
CORE_ADDR text_start; /* CORE_ADDR of 1st byte of text, this file */
long data_offset; /* offset of data section in file */
int chan; /* file descriptor for the file */
struct shared_library *shares; /* library this one shares */
};
static struct shared_library *shlib = 0;
/* Hook for `exec_file_command' command to call. */
extern void (*exec_file_display_hook) ();
static CORE_ADDR unshared_text_start;
/* extended header from exec file (for shared library info) */
static struct exec_header exec_header;
void
exec_file_command (filename, from_tty)
char *filename;
int from_tty;
{
int val;
/* Eliminate all traces of old exec file.
Mark text segment as empty. */
if (execfile)
free (execfile);
execfile = 0;
data_start = 0;
data_end -= exec_data_start;
text_start = 0;
unshared_text_start = 0;
text_end = 0;
exec_data_start = 0;
exec_data_end = 0;
if (execchan >= 0)
close (execchan);
execchan = -1;
if (shlib) {
close_shared_library(shlib);
shlib = 0;
}
/* Now open and digest the file the user requested, if any. */
if (filename)
{
filename = tilde_expand (filename);
make_cleanup (free, filename);
execchan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
&execfile);
if (execchan < 0)
perror_with_name (filename);
{
struct stat st_exec;
#ifdef HEADER_SEEK_FD
HEADER_SEEK_FD (execchan);
#endif
val = myread (execchan, &exec_header, sizeof exec_header);
exec_aouthdr = exec_header.a_exec;
if (val < 0)
perror_with_name (filename);
text_start = 0x8000;
/* Look for shared library if needed */
if (exec_header.a_exec.a_magic & MF_USES_SL)
shlib = open_shared_library(exec_header.a_shlibname, text_start);
text_offset = N_TXTOFF (exec_aouthdr);
exec_data_offset = N_TXTOFF (exec_aouthdr) + exec_aouthdr.a_text;
if (shlib) {
unshared_text_start = shared_text_end(shlib) & ~0x7fff;
stack_start = shlib->header.a_exec.a_sldatabase;
stack_end = STACK_END_ADDR;
} else
unshared_text_start = 0x8000;
text_end = unshared_text_start + exec_aouthdr.a_text;
exec_data_start = unshared_text_start + exec_aouthdr.a_text;
exec_data_end = exec_data_start + exec_aouthdr.a_data;
data_start = exec_data_start;
data_end += exec_data_start;
fstat (execchan, &st_exec);
exec_mtime = st_exec.st_mtime;
}
validate_files ();
}
else if (from_tty)
printf ("No exec file now.\n");
/* Tell display code (if any) about the changed file name. */
if (exec_file_display_hook)
(*exec_file_display_hook) (filename);
}
#endif
#if 0
/* Read from the program's memory (except for inferior processes).
This function is misnamed, since it only reads, never writes; and
since it will use the core file and/or executable file as necessary.
It should be extended to write as well as read, FIXME, for patching files.
Return 0 if address could be read, EIO if addresss out of bounds. */
int
xfer_core_file (memaddr, myaddr, len)
CORE_ADDR memaddr;
char *myaddr;
int len;
{
register int i;
register int val;
int xferchan;
char **xferfile;
int fileptr;
int returnval = 0;
while (len > 0)
{
xferfile = 0;
xferchan = 0;
/* Determine which file the next bunch of addresses reside in,
and where in the file. Set the file's read/write pointer
to point at the proper place for the desired address
and set xferfile and xferchan for the correct file.
If desired address is nonexistent, leave them zero.
i is set to the number of bytes that can be handled
along with the next address.
We put the most likely tests first for efficiency. */
/* Note that if there is no core file
data_start and data_end are equal. */
if (memaddr >= data_start && memaddr < data_end)
{
i = min (len, data_end - memaddr);
fileptr = memaddr - data_start + data_offset;
xferfile = &corefile;
xferchan = corechan;
}
/* Note that if there is no core file
stack_start and stack_end define the shared library data. */
else if (memaddr >= stack_start && memaddr < stack_end)
{
if (corechan < 0) {
struct shared_library *lib;
for (lib = shlib; lib; lib = lib->shares)
if (memaddr >= lib->header.a_exec.a_sldatabase &&
memaddr < lib->header.a_exec.a_sldatabase +
lib->header.a_exec.a_data)
break;
if (lib) {
i = min (len, lib->header.a_exec.a_sldatabase +
lib->header.a_exec.a_data - memaddr);
fileptr = lib->data_offset + memaddr -
lib->header.a_exec.a_sldatabase;
xferfile = execfile;
xferchan = lib->chan;
}
} else {
i = min (len, stack_end - memaddr);
fileptr = memaddr - stack_start + stack_offset;
xferfile = &corefile;
xferchan = corechan;
}
}
else if (corechan < 0
&& memaddr >= exec_data_start && memaddr < exec_data_end)
{
i = min (len, exec_data_end - memaddr);
fileptr = memaddr - exec_data_start + exec_data_offset;
xferfile = &execfile;
xferchan = execchan;
}
else if (memaddr >= text_start && memaddr < text_end)
{
struct shared_library *lib;
for (lib = shlib; lib; lib = lib->shares)
if (memaddr >= lib->text_start &&
memaddr < lib->text_start + lib->header.a_exec.a_text)
break;
if (lib) {
i = min (len, lib->header.a_exec.a_text +
lib->text_start - memaddr);
fileptr = memaddr - lib->text_start + text_offset;
xferfile = &execfile;
xferchan = lib->chan;
} else {
i = min (len, text_end - memaddr);
fileptr = memaddr - unshared_text_start + text_offset;
xferfile = &execfile;
xferchan = execchan;
}
}
else if (memaddr < text_start)
{
i = min (len, text_start - memaddr);
}
else if (memaddr >= text_end
&& memaddr < (corechan >= 0? data_start : exec_data_start))
{
i = min (len, data_start - memaddr);
}
else if (corechan >= 0
&& memaddr >= data_end && memaddr < stack_start)
{
i = min (len, stack_start - memaddr);
}
else if (corechan < 0 && memaddr >= exec_data_end)
{
i = min (len, - memaddr);
}
else if (memaddr >= stack_end && stack_end != 0)
{
i = min (len, - memaddr);
}
else
{
/* Address did not classify into one of the known ranges.
This shouldn't happen; we catch the endpoints. */
fatal ("Internal: Bad case logic in xfer_core_file.");
}
/* Now we know which file to use.
Set up its pointer and transfer the data. */
if (xferfile)
{
if (*xferfile == 0)
if (xferfile == &execfile)
error ("No program file to examine.");
else
error ("No core dump file or running program to examine.");
val = lseek (xferchan, fileptr, 0);
if (val < 0)
perror_with_name (*xferfile);
val = myread (xferchan, myaddr, i);
if (val < 0)
perror_with_name (*xferfile);
}
/* If this address is for nonexistent memory,
read zeros if reading, or do nothing if writing.
Actually, we never right. */
else
{
memset (myaddr, '\0', i);
returnval = EIO;
}
memaddr += i;
myaddr += i;
len -= i;
}
return returnval;
}
#endif