On 27/11/2020 17:39, Alexandre Truong wrote: > Previously, this command returns no help message on aarch64: > > -> ./perf record --user-regs=? > > available registers: > Usage: perf record [<options>] [<command>] > or: perf record [<options>] -- <command> [<options>] > > With this change, the registers are listed. > > -> ./perf record --user-regs=? > > available registers: x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15 > x16 x17 x18 x19 x20 x21 x22 x23 x24 x25 x26 x27 x28 x29 lr sp pc > > It's also now possible to record subsets of registers on aarch64: > > -> ./perf record --user-regs=x4,x5 ls > -> ./perf report --dump-raw-trace > > 12801163749305260 0xc70 [0x40]: PERF_RECORD_SAMPLE(IP, 0x2): 51956/51956: > 0xffffaa6571f0 period: 145785 addr: 0 > ... user regs: mask 0x30 ABI 64-bit > .... x4 0x000000000000006c > .... x5 0x0000001001000001 > ... thread: ls:51956 > ...... dso: /usr/lib64/ld-2.17.so >
Checked that the registers can be listed with =? and that recording different combinations of registers works as expected. Tested-by: James Clark <james.cl...@arm.com>
