cooker, seitan: Now with 100% more gluten

Pseudorandom changes and progress around cooker and seitan:

- cooker:
  - rename matching functions, split match.c
  - fix up SELECT semantics
  - add some form of handling for all syscalls in the example
    (some stubs)
  - OP_CMP for all basic and compound types except for flags
  - link jumps to next block and next match
  - completed implementation of tags
  - gluten write
  - filter clean-ups, write filters (probably not working)

- seitan:
  - load gluten and source instructions and data from there

$ ./seitan-cooker cooker/example.hjson example.gluten example.bpf
Parsing block 0
 Parsing match 0: connect
  Found description for connect
   0: OP_NR: if syscall number is not 0, jump to next block
  Parsing match argument fd
   setting tag reference 'fd'
   tag 'fd' now refers to seccomp data at 0
  Parsing match argument addr
   allocating 128 at offset 0
   1: OP_LOAD: #0 < args[1] (size: 128)
   C#0: (INT) 1
   2: OP_CMP: if temporary data: #0 NE (size: 4) read-only data: #0, jump to next block
   C#4: (STRING:24) /var/run/pr-helper.sock
   3: OP_CMP: if temporary data: #0 NE (size: 24) read-only data: #4, jump to next block
   Linking match...
   Linking block...
    linked jump of instruction #0 to #4
    linked jump of instruction #2 to #4
    linked jump of instruction #3 to #4
Parsing block 1
 Parsing match 0: ioctl
  Found description for ioctl
   4: OP_NR: if syscall number is not 112, jump to next block
  Parsing match argument path
  Parsing match argument request
   C#28: (INT) 1074025674
   5: OP_CMP: if seccomp data: #1 NE (size: 4) read-only data: #28, jump to next block
  Parsing match argument ifr
   allocating 40 at offset 128
   6: OP_LOAD: #128 < args[2] (size: 40)
   C#32: (STRING:5) tap0
   7: OP_CMP: if temporary data: #128 NE (size: 5) read-only data: #32, jump to next block
   C#37: (INT) 1
   8: OP_CMP: if temporary data: #128 NE (size: 4) read-only data: #37, jump to next block
   Linking match...
   Linking block...
    linked jump of instruction #4 to #9
    linked jump of instruction #5 to #9
    linked jump of instruction #7 to #9
    linked jump of instruction #8 to #9
Parsing block 2
 Parsing match 0: unshare
  Found description for unshare
   9: OP_NR: if syscall number is not 164, jump to next block
  Parsing match argument flags
   Linking match...
   Linking block...
    linked jump of instruction #9 to #10
Parsing block 3
 Parsing match 0: unshare
  Found description for unshare
   10: OP_NR: if syscall number is not 164, jump to next block
  Parsing match argument flags
   Linking match...
   Linking block...
    linked jump of instruction #10 to #11
Parsing block 4
 Parsing match 0: mknod
  Found description for mknod
   11: OP_NR: if syscall number is not 164, jump to next block
  Parsing match argument path
   allocating 1 at offset 168
   12: OP_LOAD: #168 < args[0] (size: 1)
   setting tag reference 'path'
   tag 'path' now refers to temporary data at 168
  Parsing match argument mode
  Parsing match argument major
  Parsing match argument minor
   setting tag reference 'minor'
   tag 'minor' now refers to seccomp data at 2
   Linking match...
   Linking block...
    linked jump of instruction #11 to #13

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/cooker/emit.h b/cooker/emit.h
index 94b2600..2135052 100644
--- a/cooker/emit.h
+++ b/cooker/emit.h
@@ -6,7 +6,7 @@
 #ifndef EMIT_H
 #define EMIT_H
 
-void emit_nr(struct gluten_ctx *g, long number);
+void emit_nr(struct gluten_ctx *g, struct gluten_offset number);
 void emit_load(struct gluten_ctx *g, struct gluten_offset dst,
 	       int index, size_t len);
 void emit_cmp(struct gluten_ctx *g, enum op_cmp_type cmp,
@@ -17,6 +17,8 @@ void emit_cmp_field(struct gluten_ctx *g, enum op_cmp_type cmp,
 		    struct gluten_offset base, struct gluten_offset match,
 		    enum jump_type jmp);
 struct gluten_offset emit_data(struct gluten_ctx *g, enum type type,
-			       union value *value);
+			       size_t str_len, union value *value);
+void link_block(struct gluten_ctx *g);
+void link_match(struct gluten_ctx *g);
 
 #endif /* EMIT_H */