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author | Jose E. Marchesi <jose.marchesi@oracle.com> | 2019-07-17 22:57:23 +0200 |
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committer | Jose E. Marchesi <jose.marchesi@oracle.com> | 2019-07-17 22:57:23 +0200 |
commit | e0b989a6d74efbcdadac4974d0b8520ac31cd9b6 (patch) | |
tree | 5585c1fc5c6229a0c2415ea411cacb50349773c2 /gas/doc/c-bpf.texi | |
parent | d8f68fcb9378b5ab1c945fa676e11da15be56dd6 (diff) | |
download | gdb-e0b989a6d74efbcdadac4974d0b8520ac31cd9b6.zip gdb-e0b989a6d74efbcdadac4974d0b8520ac31cd9b6.tar.gz gdb-e0b989a6d74efbcdadac4974d0b8520ac31cd9b6.tar.bz2 |
gas: support .half, .word and .dword directives in eBPF
This little patch adds support to the eBPF port of GAS for a few data
directives. The names for the directives have been chosen to be
coherent with the suffixes used in eBPF instructions: b, h, w and dw
for 8, 16, 32 and 64-bit values respectively.
Documentation and tests included.
Tested in a x86_64 host.
gas/ChangeLog:
2019-07-17 Jose E. Marchesi <jose.marchesi@oracle.com>
* config/tc-bpf.c (md_pseudo_table): .half, .word and .dword.
* testsuite/gas/bpf/data.s: New file.
* testsuite/gas/bpf/data.d: Likewise.
* testsuite/gas/bpf/data-be.d: Likewise.
* testsuite/gas/bpf/bpf.exp: Run data and data-be.
* doc/c-bpf.texi (BPF Directives): New section.
Diffstat (limited to 'gas/doc/c-bpf.texi')
-rw-r--r-- | gas/doc/c-bpf.texi | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gas/doc/c-bpf.texi b/gas/doc/c-bpf.texi index 13f4144..9496359 100644 --- a/gas/doc/c-bpf.texi +++ b/gas/doc/c-bpf.texi @@ -17,6 +17,7 @@ @menu * BPF Options:: Options * BPF Syntax:: Syntax +* BPF Directives:: Machine Directives * BPF Opcodes:: Opcodes @end menu @@ -104,6 +105,28 @@ descriptor @samp{2} in register @samp{r1} we would do: lddw %r1, %map_fd(2) @end smallexample +@node BPF Directives +@section Machine Directives + +@cindex machine directives, BPF + +The BPF version of @code{@value{AS}} supports the following additional +machine directives: + +@table @code +@cindex @code{half} directive, BPF +@item .word +The @code{.half} directive produces a 16 bit value. + +@cindex @code{word} directive, BPF +@item .word +The @code{.word} directive produces a 32 bit value. + +@cindex @code{dword} directive, BPF +@item .dword +The @code{.dword} directive produces a 64 bit value. +@end table + @node BPF Opcodes @section Opcodes |