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perf sdt x86: Add renaming logic for rNN and other registers
'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>
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@ -48,10 +48,42 @@ static const struct sdt_name_reg sdt_reg_renamings[] = {
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SDT_NAME_REG(rdx, dx),
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SDT_NAME_REG(esi, si),
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SDT_NAME_REG(rsi, si),
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SDT_NAME_REG(sil, si),
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SDT_NAME_REG(edi, di),
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SDT_NAME_REG(rdi, di),
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SDT_NAME_REG(dil, di),
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SDT_NAME_REG(ebp, bp),
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SDT_NAME_REG(rbp, bp),
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SDT_NAME_REG(bpl, bp),
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SDT_NAME_REG(rsp, sp),
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SDT_NAME_REG(esp, sp),
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SDT_NAME_REG(spl, sp),
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/* rNN registers */
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SDT_NAME_REG(r8b, r8),
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SDT_NAME_REG(r8w, r8),
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SDT_NAME_REG(r8d, r8),
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SDT_NAME_REG(r9b, r9),
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SDT_NAME_REG(r9w, r9),
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SDT_NAME_REG(r9d, r9),
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SDT_NAME_REG(r10b, r10),
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SDT_NAME_REG(r10w, r10),
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SDT_NAME_REG(r10d, r10),
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SDT_NAME_REG(r11b, r11),
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SDT_NAME_REG(r11w, r11),
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SDT_NAME_REG(r11d, r11),
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SDT_NAME_REG(r12b, r12),
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SDT_NAME_REG(r12w, r12),
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SDT_NAME_REG(r12d, r12),
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SDT_NAME_REG(r13b, r13),
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SDT_NAME_REG(r13w, r13),
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SDT_NAME_REG(r13d, r13),
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SDT_NAME_REG(r14b, r14),
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SDT_NAME_REG(r14w, r14),
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SDT_NAME_REG(r14d, r14),
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SDT_NAME_REG(r15b, r15),
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SDT_NAME_REG(r15w, r15),
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SDT_NAME_REG(r15d, r15),
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SDT_NAME_REG_END,
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};
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@ -88,18 +120,6 @@ int sdt_rename_register(char **pdesc, char *old_name)
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/* Copy the chars after the register name (if need be) */
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offset = prefix_len + sdt_len;
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if (offset < old_desc_len) {
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/*
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* The orginal register name can be suffixed by 'b',
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* 'w' or 'd' to indicate its size; so, we need to
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* skip this char if we met one.
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*/
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char sfx = old_desc[offset];
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if (sfx == 'b' || sfx == 'w' || sfx == 'd')
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offset++;
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}
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if (offset < old_desc_len)
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memcpy(new_desc + prefix_len + uprobe_len,
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old_desc + offset, old_desc_len - offset);
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