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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/perf/arch/s390/util/dwarf-regs.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/arch/s390/util/dwarf-regs.c')
-rw-r--r-- | tools/perf/arch/s390/util/dwarf-regs.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/tools/perf/arch/s390/util/dwarf-regs.c b/tools/perf/arch/s390/util/dwarf-regs.c new file mode 100644 index 000000000..a8ace5cc6 --- /dev/null +++ b/tools/perf/arch/s390/util/dwarf-regs.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Mapping of DWARF debug register numbers into register names. + * + * 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 <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; +} |