From f146c7bc85a51f95c05e0f8173d484eb301ece78 Mon Sep 17 00:00:00 2001 From: Danilo Krummrich Date: Thu, 13 Aug 2026 18:52:04 +0200 Subject: PCI: Add pci_irq_type() to query the allocated interrupt type Add a helper that returns PCI_IRQ_MSIX, PCI_IRQ_MSI, or PCI_IRQ_INTX based on the interrupt type the PCI core selected after pci_alloc_irq_vectors(). Several drivers already open-code this check against pdev->msix_enabled and pdev->msi_enabled, or even open code this helper [1]. A common helper avoids the duplication and keeps drivers from accessing the bitfield directly (see also [2]). Acked-by: Bjorn Helgaas Tested-by: John Hubbard Link: https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196 [1] Inspired-by: John Hubbard Link: https://lore.kernel.org/all/DKKG2QM3YJYB.Z2H2B2UXJ75N@kernel.org/ [2] Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260813165234.620555-5-dakr@kernel.org [ Add missing pci_irq_type() stub for CONFIG_PCI=n. ] Signed-off-by: Danilo Krummrich --- tools/perf/util/demangle-ocaml.c | 68 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 tools/perf/util/demangle-ocaml.c (limited to 'tools/perf/util/demangle-ocaml.c') diff --git a/tools/perf/util/demangle-ocaml.c b/tools/perf/util/demangle-ocaml.c new file mode 100644 index 000000000..9d707bb60 --- /dev/null +++ b/tools/perf/util/demangle-ocaml.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include "util/string2.h" + +#include "demangle-ocaml.h" + +#include + +static const char *caml_prefix = "caml"; +static const size_t caml_prefix_len = 4; + +/* mangled OCaml symbols start with "caml" followed by an upper-case letter */ +static bool +ocaml_is_mangled(const char *sym) +{ + return 0 == strncmp(sym, caml_prefix, caml_prefix_len) + && isupper(sym[caml_prefix_len]); +} + +/* + * input: + * sym: a symbol which may have been mangled by the OCaml compiler + * return: + * if the input doesn't look like a mangled OCaml symbol, NULL is returned + * otherwise, a newly allocated string containing the demangled symbol is returned + */ +char * +ocaml_demangle_sym(const char *sym) +{ + char *result; + int j = 0; + int i; + int len; + + if (!ocaml_is_mangled(sym)) { + return NULL; + } + + len = strlen(sym); + + /* the demangled symbol is always smaller than the mangled symbol */ + result = malloc(len + 1); + if (!result) + return NULL; + + /* skip "caml" prefix */ + i = caml_prefix_len; + + while (i < len) { + if (sym[i] == '_' && sym[i + 1] == '_') { + /* "__" -> "." */ + result[j++] = '.'; + i += 2; + } + else if (sym[i] == '$' && isxdigit(sym[i + 1]) && isxdigit(sym[i + 2])) { + /* "$xx" is a hex-encoded character */ + result[j++] = (hex(sym[i + 1]) << 4) | hex(sym[i + 2]); + i += 3; + } + else { + result[j++] = sym[i++]; + } + } + result[j] = '\0'; + + return result; +} -- cgit v1.3.1