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perf sdt x86: Add renaming logic for rNN and other registers

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'perf probe' is failing for sdt markers whose arguments has rNN (with
postfix b/w/d), %rsp, %esp, %sil etc. registers. Add renaming logic for
these registers.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexis Berlemont <alexis.berlemont@gmail.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170202111143.14319-3-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ravi Bangoria 2017-02-02 16:41:40 +05:30 committed by Arnaldo Carvalho de Melo
parent 3b1f8311f6
commit 8544d24c32
1 changed files with 32 additions and 12 deletions
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44
tools/perf/arch/x86/util/perf_regs.c
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@ -48,10 +48,42 @@ static const struct sdt_name_reg sdt_reg_renamings[] = {
SDT_NAME_REG(rdx, dx),
SDT_NAME_REG(esi, si),
SDT_NAME_REG(rsi, si),
SDT_NAME_REG(sil, si),
SDT_NAME_REG(edi, di),
SDT_NAME_REG(rdi, di),
SDT_NAME_REG(dil, di),
SDT_NAME_REG(ebp, bp),
SDT_NAME_REG(rbp, bp),
SDT_NAME_REG(bpl, bp),
SDT_NAME_REG(rsp, sp),
SDT_NAME_REG(esp, sp),
SDT_NAME_REG(spl, sp),
/* rNN registers */
SDT_NAME_REG(r8b, r8),
SDT_NAME_REG(r8w, r8),
SDT_NAME_REG(r8d, r8),
SDT_NAME_REG(r9b, r9),
SDT_NAME_REG(r9w, r9),
SDT_NAME_REG(r9d, r9),
SDT_NAME_REG(r10b, r10),
SDT_NAME_REG(r10w, r10),
SDT_NAME_REG(r10d, r10),
SDT_NAME_REG(r11b, r11),
SDT_NAME_REG(r11w, r11),
SDT_NAME_REG(r11d, r11),
SDT_NAME_REG(r12b, r12),
SDT_NAME_REG(r12w, r12),
SDT_NAME_REG(r12d, r12),
SDT_NAME_REG(r13b, r13),
SDT_NAME_REG(r13w, r13),
SDT_NAME_REG(r13d, r13),
SDT_NAME_REG(r14b, r14),
SDT_NAME_REG(r14w, r14),
SDT_NAME_REG(r14d, r14),
SDT_NAME_REG(r15b, r15),
SDT_NAME_REG(r15w, r15),
SDT_NAME_REG(r15d, r15),
SDT_NAME_REG_END,
};
@ -88,18 +120,6 @@ int sdt_rename_register(char **pdesc, char *old_name)
/* Copy the chars after the register name (if need be) */
offset = prefix_len + sdt_len;
if (offset < old_desc_len) {
/*
* The orginal register name can be suffixed by 'b',
* 'w' or 'd' to indicate its size; so, we need to
* skip this char if we met one.
*/
char sfx = old_desc[offset];
if (sfx == 'b' || sfx == 'w' || sfx == 'd')
offset++;
}
if (offset < old_desc_len)
memcpy(new_desc + prefix_len + uprobe_len,
old_desc + offset, old_desc_len - offset);