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Re: Build failure for ``no options PTRACE''

OK, I updated kern/kern_core.c to #include exec_elf.h and made is past
the modules.

I'll install in the morning and make sure that all combinations of
modules from {coredump, exec_elf32, exec_elf64} work.  At the very
least, they all have to successfully load in any sequence without
requiring any circular dependencies!

More info tomorrow...


On Sat, 17 Oct 2020, Paul Goyette wrote:



On Sat, 17 Oct 2020, Christos Zoulas wrote:
Just add their declarations in exec_elf.h they have the same signatures as the "unreal" ones :-) 

Tried that, but now kern_core.c won't compile as part of the coredump
module:

...
#   compile  coredump/kern_core.o
... (gcc command line elided)
In file included from /build/netbsd-local/src_ro/sys/sys/compat_stub.h:35,
                from /build/netbsd-local/src_ro/sys/kern/kern_core.c:53:
/build/netbsd-local/src_ro/sys/kern/kern_core.c: In function 'coredump_modcmd': /build/netbsd-local/src_ro/sys/kern/kern_core.c:80:40: error: 'real_coredump_elf32' undeclared (first use in this function); did you mean 'real_coredump_netbsd'? 
  80 |   MODULE_HOOK_SET(coredump_elf32_hook, real_coredump_elf32);
     |                                        ^~~~~~~~~~~~~~~~~~~
/build/netbsd-local/src_ro/sys/kern/kern_core.c:80:40: note: each undeclared identifier is reported only once for each function it appears in /build/netbsd-local/src_ro/sys/kern/kern_core.c:81:40: error: 'real_coredump_elf64' undeclared (first use in this function); did you mean 'real_coredump_netbsd'? 
  81 |   MODULE_HOOK_SET(coredump_elf64_hook, real_coredump_elf64);
     |                                        ^~~~~~~~~~~~~~~~~~~
*** [kern_core.o] Error code 1





christos


On Oct 17, 2020, at 1:32 PM, Paul Goyette <paul%whooppee.com@localhost> wrote:

OK, I got a build failure for modules:

#   compile  coredump/kern_core.o
/build/netbsd-local/tools/x86_64/amd64/bin/x86_64--netbsd-gcc -O2 -g -std=gnu99 -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-sign-compare -Wsystem-headers -Wno-traditional -Wa,--fatal-warnings -Wreturn-type -Wswitch -Wshadow -Wcast-qual -Wwrite-strings -Wextra -Wno-unused-parameter -Wno-sign-compare -Werror -Wno-error=address-of-packed-member -ffreestanding -fno-strict-aliasing -Wno-pointer-sign -mno-red-zone -mno-mmx -mno-sse -mno-avx -msoft-float -mcmodel=kernel -fno-omit-frame-pointer -I/build/netbsd-local/src/common/include -DDIAGNOSTIC --sysroot=/build/netbsd-local/dest/amd64 -I/build/netbsd-local/src/common/include -DDIAGNOSTIC -nostdinc -I. -I/build/netbsd-local/src/sys/modules/coredump -isystem /build/netbsd-local/src/sys -isystem /build/netbsd-local/src/sys/arch -isystem /build/netbsd-local/src/sys/../common/include -D_KERNEL -D_MODULE -DSYSCTL_INCLUDE_DESCR -c -Wno-cast-function-type /build/netbsd-local/src/sys/kern/kern_ 
core.c
In file included from /build/netbsd-local/src/sys/sys/compat_stub.h:35,
                from /build/netbsd-local/src/sys/kern/kern_core.c:53:
/build/netbsd-local/src/sys/kern/kern_core.c: In function 'coredump_modcmd': /build/netbsd-local/src/sys/kern/kern_core.c:80:40: error: 'real_coredump_elf32' undeclared (first use in this function); did you mean 'real_coredump_netbsd'? 
  80 |   MODULE_HOOK_SET(coredump_elf32_hook, real_coredump_elf32);
     |                                        ^~~~~~~~~~~~~~~~~~~
/build/netbsd-local/src/sys/kern/kern_core.c:80:40: note: each undeclared identifier is reported only once for each function it appears in /build/netbsd-local/src/sys/kern/kern_core.c:81:40: error: 'real_coredump_elf64' undeclared (first use in this function); did you mean 'real_coredump_netbsd'? 
  81 |   MODULE_HOOK_SET(coredump_elf64_hook, real_coredump_elf64);
     |                                        ^~~~~~~~~~~~~~~~~~~
*** [kern_core.o] Error code 1
nbmake[2]: stopped in /build/netbsd-local/src/sys/modules/coredump
1 error
nbmake[2]: stopped in /build/netbsd-local/src/sys/modules/coredump

ERROR: Failed to make dependall in "sys/modules"
*** BUILD ABORTED ***




On Sat, 17 Oct 2020, Paul Goyette wrote:


Oh, ignore this for now.  I might have to also rebuild my modules again.

On Sat, 17 Oct 2020, Paul Goyette wrote:


On Sat, 17 Oct 2020, Paul Goyette wrote:

Thanks - I'll give it a try.

OK, it builds.  But it doesn't work, and least not completely!
FWIW, in addition to

	no options COREDUMP
	no options PTRACE
my custom kernel also has

	no options EXEC_ELF32
	no options EXEC_ELF64
These modules are expected to be auto-loaded as necessary.
It seems that the exec_elf* modules fail to load, since the symbol
coredump_elf{32,64} is already defined in the kernel, even though
I have the ``no options EXEC_ELF*'' in the config.
...
[   8.0347157] init: copying out path `/sbin/init' 11
[ 8.0544213] kobj_checksyms, 1026: [%M/exec_elf32/exec_elf32.kmod]: linker error: global symbol `coredump_elf32' redefined [ 8.0544213] WARNING: module error: vfs load failed for `exec_elf32', error 8 [ 8.0544213] kobj_checksyms, 1026: [%M/exec_elf64/exec_elf64.kmod]: linker error: global symbol `coredump_elf64' redefined [ 8.0544213] WARNING: module error: vfs load failed for `exec_elf64', error 8 
...
+--------------------+--------------------------+-----------------------+
| Paul Goyette | PGP Key fingerprint: | E-mail addresses: | | (Retired) | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost | | Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost | 
+--------------------+--------------------------+-----------------------+


+--------------------+--------------------------+-----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:     |
| (Retired) | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost <mailto:paul%whooppee.com@localhost> | | Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost <mailto:pgoyette%netbsd.org@localhost> | 
+--------------------+--------------------------+-----------------------+

!DSPAM:5f8b271b6532105318807!




+--------------------+--------------------------+-----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:     |
| (Retired)          | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost     |
| Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost   |
+--------------------+--------------------------+-----------------------+





+--------------------+--------------------------+-----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:     |
| (Retired)          | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost     |
| Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost   |
+--------------------+--------------------------+-----------------------+



+--------------------+--------------------------+-----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:     |
| (Retired)          | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost     |
| Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost   |
+--------------------+--------------------------+-----------------------+
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