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author | Jason Gunthorpe <jgg@mellanox.com> | 2018-01-29 23:26:40 +0300 |
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committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-01-30 19:30:00 +0300 |
commit | e7996a9a77fc669387da43ff4823b91cc4872bd0 (patch) | |
tree | 617f0a128e222539d67e8cccc359f1bc4b984900 /tools/perf/arch/s390/util/dwarf-regs.c | |
parent | b5fa635aab8f0d39a824c01991266a6d06f007fb (diff) | |
parent | d8a5b80568a9cb66810e75b182018e9edb68e8ff (diff) | |
download | linux-e7996a9a77fc669387da43ff4823b91cc4872bd0.tar.xz |
Merge tag v4.15 of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
To resolve conflicts in:
drivers/infiniband/hw/mlx5/main.c
drivers/infiniband/hw/mlx5/qp.c
From patches merged into the -rc cycle. The conflict resolution matches
what linux-next has been carrying.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'tools/perf/arch/s390/util/dwarf-regs.c')
-rw-r--r-- | tools/perf/arch/s390/util/dwarf-regs.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/tools/perf/arch/s390/util/dwarf-regs.c b/tools/perf/arch/s390/util/dwarf-regs.c index f47576ce13ea..a8ace5cc6301 100644 --- a/tools/perf/arch/s390/util/dwarf-regs.c +++ b/tools/perf/arch/s390/util/dwarf-regs.c @@ -2,17 +2,43 @@ /* * Mapping of DWARF debug register numbers into register names. * - * Copyright IBM Corp. 2010 - * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, + * Copyright IBM Corp. 2010, 2017 + * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, + * Hendrik Brueckner <brueckner@linux.vnet.ibm.com> * */ +#include <errno.h> #include <stddef.h> -#include <dwarf-regs.h> +#include <stdlib.h> #include <linux/kernel.h> +#include <asm/ptrace.h> +#include <string.h> +#include <dwarf-regs.h> #include "dwarf-regs-table.h" const char *get_arch_regstr(unsigned int n) { return (n >= ARRAY_SIZE(s390_dwarf_regs)) ? NULL : s390_dwarf_regs[n]; } + +/* + * Convert the register name into an offset to struct pt_regs (kernel). + * This is required by the BPF prologue generator. The BPF + * program is called in the BPF overflow handler in the perf + * core. + */ +int regs_query_register_offset(const char *name) +{ + unsigned long gpr; + + if (!name || strncmp(name, "%r", 2)) + return -EINVAL; + + errno = 0; + gpr = strtoul(name + 2, NULL, 10); + if (errno || gpr >= 16) + return -EINVAL; + + return offsetof(user_pt_regs, gprs) + 8 * gpr; +} |