HP-UX Reference (11i v1 05/09) - 1 User Commands A-M (vol 1)

a
adb(1) adb(1)
On entry, the following named variables are set from the coreheaders in the corfil.Ifcorfil does not appear
to be a
core file, these values are set from objfil.
b The base address of the data segment.
d The data segment size.
s The stack segment size.
t The text segment size.
The following variables are set from objfil.
e The entry point.
m The "magic" number as defined in
<magic.h>.
Addresses
The file address associated with a written address is determined by a mapping described below; see
$m.
Both the objfil mapping and the default corfil mapping are represented by two triples (b1, e1, f1) and (b2,
e2, f2). The initial mapping for a valid corfil contains a triple for each segment (coreheader).
The file address corresponding to a written address is calculated as follows:
If
b1 <= address < e1,thenfile address = address + f1 − b1.
Otherwise, if
b2 <= address < e2,thenfile address = address + f2 − b2.
Otherwise, the requested address is not valid. For a valid corfil, this pattern repeats as many times as
there are segments (coreheaders) in the corfil, rather than twice. If
? or / is followed by *, only the
second triple is used, or (when using the initial mapping of a valid corfil) only segments with a
CORE_STACK coreheader.
The initial setting of both mappings is suitable for normal a.out and core files. If either file is not of the
kind expected, adb sets b1 to 0, e1 to the maximum file size, and f1 to
0; in this way the entire file can be
examined with no address translation.
adb keeps all appropriate values as signed 32-bit integers so that it can be used on large files.
EXTERNAL INFLUENCES
International Code Set Support
Single- and multi-byte character code sets are supported.
RETURN VALUE
adb comments about inaccessible files, syntax errors, abnormal termination of commands, etc. It echoes
adb when there is no current command or format. Exit status is 0, unless the last command failed or
returned non-zero status.
DEPENDENCIES
• Setting breakpoints in shared libraries is not supported.
adb does not read the linker symbol table for shared libraries, and cannot access locations in shared
libraries by name. In a stack backtrace ($c), adb does not know the names of shared library pro-
cedures.
If the core file was created when the program was in a shared library function, the $c command does
not work. When a stack backtrace for the core file encounters a shared library procedure on the stack it
aborts at that point.
• A leading zero by itself is not recognized as a radix indicator. Use the prefixes 0o or 0O (zero-oh) to
force interpretation in octal radix. The prefixes 0t and 0T are also accepted to force interpretation in
decimal radix. Thus 0o20 = 0t16 = sixteen. A hexadecimal number whose most significant digit
would otherwise be an alphabetic character may begin with a leading zero instead of 0x (or 0X), if the
default radix is hexadecimal.
• The $f command prints floating point registers as 32-bit single precision and $F prints these registers
as 64-bit doubles.
Section 1−−8 Hewlett-Packard Company − 6 − HP-UX 11i Version 1: September 2005