Adding upstream version 1:3.11.1.upstream/1%3.11.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 564 insertions, 0 deletions

diff --git a/lib/init.c b/lib/init.c
new file mode 100644
index 0000000..c26720a
--- /dev/null
+++ b/lib/init.c
@@ -0,0 +1,564 @@
+/*
+ *	The PCI Library -- Initialization and related things
+ *
+ *	Copyright (c) 1997--2024 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL v2+.
+ *
+ *	SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "internal.h"
+
+#ifdef PCI_OS_DJGPP
+#include <crt0.h> /* for __dos_argv0 */
+#endif
+
+#ifdef PCI_OS_WINDOWS
+
+#include <windows.h>
+
+/* Force usage of ANSI (char*) variant of GetModuleFileName() function */
+#ifdef _WIN32
+#ifdef GetModuleFileName
+#undef GetModuleFileName
+#endif
+#define GetModuleFileName GetModuleFileNameA
+#endif
+
+/* Define __ImageBase for all linkers */
+#ifdef _WIN32
+/* GNU LD provides __ImageBase symbol since 2.19, in previous versions it is
+ * under name _image_base__, so add weak alias for compatibility. */
+#ifdef __GNUC__
+asm(".weak\t" PCI_STRINGIFY(__MINGW_USYMBOL(__ImageBase)) "\n\t"
+    ".set\t"  PCI_STRINGIFY(__MINGW_USYMBOL(__ImageBase)) "," PCI_STRINGIFY(__MINGW_USYMBOL(_image_base__)));
+#endif
+/*
+ * MSVC link.exe provides __ImageBase symbol since 12.00 (MSVC 6.0), for
+ * previous versions resolve it at runtime via GetModuleHandleA() which
+ * returns base for main executable or via VirtualQuery() for DLL builds.
+ */
+#if defined(_MSC_VER) && _MSC_VER < 1200
+static HMODULE
+get_current_module_handle(void)
+{
+#ifdef PCI_SHARED_LIB
+  MEMORY_BASIC_INFORMATION info;
+  size_t len = VirtualQuery(&get_current_module_handle, &info, sizeof(info));
+  if (len != sizeof(info))
+    return NULL;
+  return (HMODULE)info.AllocationBase;
+#else
+  return GetModuleHandleA(NULL);
+#endif
+}
+#define __ImageBase (*(IMAGE_DOS_HEADER *)get_current_module_handle())
+#else
+extern IMAGE_DOS_HEADER __ImageBase;
+#endif
+#endif
+
+#if defined(_WINDLL)
+extern HINSTANCE _hModule;
+#elif defined(_WINDOWS)
+extern HINSTANCE _hInstance;
+#endif
+
+#endif
+
+static struct pci_methods *pci_methods[PCI_ACCESS_MAX] = {
+  NULL,
+#ifdef PCI_HAVE_PM_LINUX_SYSFS
+  &pm_linux_sysfs,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_LINUX_PROC
+  &pm_linux_proc,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_INTEL_CONF
+  &pm_intel_conf1,
+  &pm_intel_conf2,
+#else
+  NULL,
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_FBSD_DEVICE
+  &pm_fbsd_device,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_AIX_DEVICE
+  &pm_aix_device,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_NBSD_LIBPCI
+  &pm_nbsd_libpci,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_OBSD_DEVICE
+  &pm_obsd_device,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_DUMP
+  &pm_dump,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_DARWIN_DEVICE
+  &pm_darwin,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_SYLIXOS_DEVICE
+  &pm_sylixos_device,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_HURD_CONF
+  &pm_hurd,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_WIN32_CFGMGR32
+  &pm_win32_cfgmgr32,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_WIN32_KLDBG
+  &pm_win32_kldbg,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_WIN32_SYSDBG
+  &pm_win32_sysdbg,
+#else
+  NULL,
+#endif
+#ifdef PCI_HAVE_PM_MMIO_CONF
+  &pm_mmio_conf1,
+  &pm_mmio_conf1_ext,
+#else
+  NULL,
+  NULL,
+#endif
+#if defined(PCI_HAVE_PM_ECAM)
+  &pm_ecam,
+#else
+  NULL,
+#endif
+#if defined(PCI_HAVE_PM_AOS_EXPANSION)
+  &pm_aos_expansion,
+#else
+  NULL,
+#endif
+};
+
+// If PCI_ACCESS_AUTO is selected, we probe the access methods in this order
+static int probe_sequence[] = {
+  // System-specific methods
+  PCI_ACCESS_SYS_BUS_PCI,
+  PCI_ACCESS_PROC_BUS_PCI,
+  PCI_ACCESS_FBSD_DEVICE,
+  PCI_ACCESS_AIX_DEVICE,
+  PCI_ACCESS_NBSD_LIBPCI,
+  PCI_ACCESS_OBSD_DEVICE,
+  PCI_ACCESS_DARWIN,
+  PCI_ACCESS_SYLIXOS_DEVICE,
+  PCI_ACCESS_HURD,
+  PCI_ACCESS_WIN32_CFGMGR32,
+  PCI_ACCESS_WIN32_KLDBG,
+  PCI_ACCESS_WIN32_SYSDBG,
+  PCI_ACCESS_AOS_EXPANSION,
+  // Low-level methods poking the hardware directly
+  PCI_ACCESS_ECAM,
+  PCI_ACCESS_I386_TYPE1,
+  PCI_ACCESS_I386_TYPE2,
+  PCI_ACCESS_MMIO_TYPE1_EXT,
+  PCI_ACCESS_MMIO_TYPE1,
+  -1,
+};
+
+static void PCI_NONRET
+pci_generic_error(char *msg, ...)
+{
+  va_list args;
+
+  va_start(args, msg);
+  fputs("pcilib: ", stderr);
+  vfprintf(stderr, msg, args);
+  va_end(args);
+  fputc('\n', stderr);
+  exit(1);
+}
+
+static void
+pci_generic_warn(char *msg, ...)
+{
+  va_list args;
+
+  va_start(args, msg);
+  fputs("pcilib: ", stderr);
+  vfprintf(stderr, msg, args);
+  va_end(args);
+  fputc('\n', stderr);
+}
+
+static void
+pci_generic_debug(char *msg, ...)
+{
+  va_list args;
+
+  va_start(args, msg);
+  vfprintf(stdout, msg, args);
+  va_end(args);
+}
+
+static void
+pci_null_debug(char *msg UNUSED, ...)
+{
+}
+
+// Memory allocation functions are safe to call if pci_access is not fully initalized or even NULL
+
+void *
+pci_malloc(struct pci_access *a, int size)
+{
+  void *x = malloc(size);
+
+  if (!x)
+    (a && a->error ? a->error : pci_generic_error)("Out of memory (allocation of %d bytes failed)", size);
+  return x;
+}
+
+void
+pci_mfree(void *x)
+{
+  if (x)
+    free(x);
+}
+
+char *
+pci_strdup(struct pci_access *a, const char *s)
+{
+  int len = strlen(s) + 1;
+  char *t = pci_malloc(a, len);
+  memcpy(t, s, len);
+  return t;
+}
+
+int
+pci_lookup_method(char *name)
+{
+  int i;
+
+  for (i=0; i<PCI_ACCESS_MAX; i++)
+    if (pci_methods[i] && !strcmp(pci_methods[i]->name, name))
+      return i;
+  return -1;
+}
+
+char *
+pci_get_method_name(int index)
+{
+  if (index < 0 || index >= PCI_ACCESS_MAX)
+    return NULL;
+  else if (!pci_methods[index])
+    return "";
+  else
+    return pci_methods[index]->name;
+}
+
+#if defined(PCI_OS_WINDOWS) || defined(PCI_OS_DJGPP)
+
+static void
+pci_init_name_list_path(struct pci_access *a)
+{
+  if ((PCI_PATH_IDS_DIR)[0])
+    pci_set_name_list_path(a, PCI_PATH_IDS_DIR "\\" PCI_IDS, 0);
+  else
+    {
+      char *path, *sep;
+      size_t len;
+
+#if defined(PCI_OS_WINDOWS) && (defined(_WIN32) || defined(_WINDLL) || defined(_WINDOWS))
+
+      HMODULE module;
+      size_t size;
+
+#if defined(_WIN32)
+      module = (HINSTANCE)&__ImageBase;
+#elif defined(_WINDLL)
+      module = _hModule;
+#elif defined(_WINDOWS)
+      module = _hInstance;
+#endif
+
+      /*
+       * Module file name can have arbitrary length despite all MS examples say
+       * about MAX_PATH upper limit. This limit does not apply for example when
+       * executable is running from network disk with very long UNC paths or
+       * when using "\\??\\" prefix for specifying executable binary path.
+       * Function GetModuleFileName() returns passed size argument when passed
+       * buffer is too small and does not signal any error. In this case retry
+       * again with larger buffer.
+       */
+      size = 256; /* initial buffer size (more than sizeof(PCI_IDS)-4) */
+retry:
+      path = pci_malloc(a, size);
+      len = GetModuleFileName(module, path, size-sizeof(PCI_IDS)-4); /* 4 for "\\\\?\\" */
+      if (len >= size-sizeof(PCI_IDS)-4)
+        {
+          free(path);
+          size *= 2;
+          goto retry;
+        }
+      else if (len == 0)
+        path[0] = '\0';
+
+      /*
+       * GetModuleFileName() has bugs. On Windows 10 it prepends current drive
+       * letter if path is just pure NT namespace (with "\\??\\" prefix). Such
+       * extra drive letter makes path fully invalid and unusable. So remove
+       * extra drive letter to make path valid again.
+       * Reproduce: CreateProcessW("\\??\\C:\\lspci.exe", ...)
+       */
+      if (((path[0] >= 'a' && path[0] <= 'z') ||
+           (path[0] >= 'A' && path[0] <= 'Z')) &&
+          strncmp(path+1, ":\\??\\", 5) == 0)
+        {
+          memmove(path, path+2, len-2);
+          len -= 2;
+          path[len] = '\0';
+        }
+
+      /*
+       * GetModuleFileName() has bugs. On Windows 10 it does not add "\\\\?\\"
+       * prefix when path is in native NT UNC namespace. Such path is treated by
+       * WinAPI/DOS functions as standard DOS path relative to the current
+       * directory, hence something completely different. So prepend missing
+       * "\\\\?\\" prefix to make path valid again.
+       * Reproduce: CreateProcessW("\\??\\UNC\\10.0.2.4\\qemu\\lspci.exe", ...)
+       *
+       * If path starts with DOS drive letter and with appended PCI_IDS is
+       * longer than 260 bytes and is without "\\\\?\\" prefix then append it.
+       * This prefix is required for paths and file names with DOS drive letter
+       * longer than 260 bytes.
+       */
+      if (strncmp(path, "\\UNC\\", 5) == 0 ||
+          strncmp(path, "UNC\\", 4) == 0 ||
+          (((path[0] >= 'a' && path[0] <= 'z') || (path[0] >= 'A' && path[0] <= 'Z')) &&
+           len + sizeof(PCI_IDS) >= 260))
+        {
+          memmove(path+4, path, len);
+          memcpy(path, "\\\\?\\", 4);
+          len += 4;
+          path[len] = '\0';
+        }
+
+#elif defined(PCI_OS_DJGPP) || defined(PCI_OS_WINDOWS)
+
+      const char *exe_path;
+
+#ifdef PCI_OS_DJGPP
+      exe_path = __dos_argv0;
+#else
+      exe_path = _pgmptr;
+#endif
+
+      len = strlen(exe_path);
+      path = pci_malloc(a, len+sizeof(PCI_IDS));
+      memcpy(path, exe_path, len+1);
+
+#endif
+
+      sep = strrchr(path, '\\');
+      if (!sep)
+        {
+          /*
+           * If current module path (current executable for static builds or
+           * current DLL library for shared build) cannot be determined then
+           * fallback to the current directory.
+           */
+          free(path);
+          pci_set_name_list_path(a, PCI_IDS, 0);
+        }
+      else
+        {
+          memcpy(sep+1, PCI_IDS, sizeof(PCI_IDS));
+          pci_set_name_list_path(a, path, 1);
+        }
+    }
+}
+
+#elif defined PCI_OS_AMIGAOS
+
+static void
+pci_init_name_list_path(struct pci_access *a)
+{
+  int len = strlen(PCI_PATH_IDS_DIR);
+
+  if (!len)
+    pci_set_name_list_path(a, PCI_IDS, 0);
+  else
+    {
+      char last_char = PCI_PATH_IDS_DIR[len - 1];
+      if (last_char == ':' || last_char == '/')  // root or parent char
+	pci_set_name_list_path(a, PCI_PATH_IDS_DIR PCI_IDS, 0);
+      else
+	pci_set_name_list_path(a, PCI_PATH_IDS_DIR "/" PCI_IDS, 0);
+    }
+}
+
+#else
+
+static void
+pci_init_name_list_path(struct pci_access *a)
+{
+  pci_set_name_list_path(a, PCI_PATH_IDS_DIR "/" PCI_IDS, 0);
+}
+
+#endif
+
+#ifdef PCI_USE_DNS
+
+static void
+pci_init_dns(struct pci_access *a)
+{
+  pci_define_param(a, "net.domain", PCI_ID_DOMAIN, "DNS domain used for resolving of ID's");
+  a->id_lookup_mode = PCI_LOOKUP_CACHE;
+
+  char *cache_dir = getenv("XDG_CACHE_HOME");
+  if (!cache_dir)
+    cache_dir = "~/.cache";
+
+  int name_len = strlen(cache_dir) + 32;
+  char *cache_name = pci_malloc(NULL, name_len);
+  snprintf(cache_name, name_len, "%s/pci-ids", cache_dir);
+  struct pci_param *param = pci_define_param(a, "net.cache_name", cache_name, "Name of the ID cache file");
+  param->value_malloced = 1;
+}
+
+#endif
+
+struct pci_access *
+pci_alloc(void)
+{
+  struct pci_access *a = pci_malloc(NULL, sizeof(struct pci_access));
+  int i;
+
+  memset(a, 0, sizeof(*a));
+  pci_init_name_list_path(a);
+#ifdef PCI_USE_DNS
+  pci_init_dns(a);
+#endif
+#ifdef PCI_HAVE_HWDB
+  pci_define_param(a, "hwdb.disable", "0", "Do not look up names in UDEV's HWDB if non-zero");
+#endif
+  for (i=0; i<PCI_ACCESS_MAX; i++)
+    if (pci_methods[i] && pci_methods[i]->config)
+      pci_methods[i]->config(a);
+  return a;
+}
+
+int
+pci_init_internal(struct pci_access *a, int skip_method)
+{
+  if (!a->error)
+    a->error = pci_generic_error;
+  if (!a->warning)
+    a->warning = pci_generic_warn;
+  if (!a->debug)
+    a->debug = pci_generic_debug;
+  if (!a->debugging)
+    a->debug = pci_null_debug;
+
+  if (a->method != PCI_ACCESS_AUTO)
+    {
+      if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method])
+	a->error("This access method is not supported.");
+      a->methods = pci_methods[a->method];
+    }
+  else
+    {
+      unsigned int i;
+      for (i=0; probe_sequence[i] >= 0; i++)
+	{
+	  struct pci_methods *m = pci_methods[probe_sequence[i]];
+	  if (!m)
+	    continue;
+	  if (skip_method == probe_sequence[i])
+	    continue;
+	  a->debug("Trying method %s...", m->name);
+	  if (m->detect(a))
+	    {
+	      a->debug("...OK\n");
+	      a->methods = m;
+	      a->method = probe_sequence[i];
+	      break;
+	    }
+	  a->debug("...No.\n");
+	}
+      if (!a->methods)
+	return 0;
+    }
+  a->debug("Decided to use %s\n", a->methods->name);
+  a->methods->init(a);
+  return 1;
+}
+
+void
+pci_init_v35(struct pci_access *a)
+{
+  if (!pci_init_internal(a, -1))
+    a->error("Cannot find any working access method.");
+}
+
+STATIC_ALIAS(void pci_init(struct pci_access *a), pci_init_v35(a));
+DEFINE_ALIAS(void pci_init_v30(struct pci_access *a), pci_init_v35);
+SYMBOL_VERSION(pci_init_v30, pci_init@LIBPCI_3.0);
+SYMBOL_VERSION(pci_init_v35, pci_init@@LIBPCI_3.5);
+
+struct pci_access *
+pci_clone_access(struct pci_access *a)
+{
+  struct pci_access *b = pci_alloc();
+
+  b->writeable = a->writeable;
+  b->buscentric = a->buscentric;
+  b->debugging = a->debugging;
+  b->error = a->error;
+  b->warning = a->warning;
+  b->debug = a->debug;
+
+  return b;
+}
+
+void
+pci_cleanup(struct pci_access *a)
+{
+  struct pci_dev *d, *e;
+
+  for (d=a->devices; d; d=e)
+    {
+      e = d->next;
+      pci_free_dev(d);
+    }
+  if (a->methods)
+    a->methods->cleanup(a);
+  pci_free_name_list(a);
+  pci_free_params(a);
+  pci_set_name_list_path(a, NULL, 0);
+  pci_mfree(a);
+}