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Diffstat (limited to 'lib/vsprintf.c')
-rw-r--r--lib/vsprintf.c120
1 files changed, 83 insertions, 37 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index e78017a3e1bd..dee8fc467fcf 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -21,6 +21,7 @@
#include <linux/build_bug.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
+#include <linux/errname.h>
#include <linux/module.h> /* for KSYM_SYMBOL_LEN */
#include <linux/types.h>
#include <linux/string.h>
@@ -38,6 +39,7 @@
#include <net/addrconf.h>
#include <linux/siphash.h>
#include <linux/compiler.h>
+#include <linux/property.h>
#ifdef CONFIG_BLOCK
#include <linux/blkdev.h>
#endif
@@ -613,6 +615,25 @@ static char *string_nocheck(char *buf, char *end, const char *s,
return widen_string(buf, len, end, spec);
}
+static char *err_ptr(char *buf, char *end, void *ptr,
+ struct printf_spec spec)
+{
+ int err = PTR_ERR(ptr);
+ const char *sym = errname(err);
+
+ if (sym)
+ return string_nocheck(buf, end, sym, spec);
+
+ /*
+ * Somebody passed ERR_PTR(-1234) or some other non-existing
+ * Efoo - or perhaps CONFIG_SYMBOLIC_ERRNAME=n. Fall back to
+ * printing it as its decimal representation.
+ */
+ spec.flags |= SIGN;
+ spec.base = 10;
+ return number(buf, end, err, spec);
+}
+
/* Be careful: error messages must fit into the given buffer. */
static char *error_string(char *buf, char *end, const char *s,
struct printf_spec spec)
@@ -918,7 +939,7 @@ char *symbol_string(char *buf, char *end, void *ptr,
#ifdef CONFIG_KALLSYMS
if (*fmt == 'B')
sprint_backtrace(sym, value);
- else if (*fmt != 'f' && *fmt != 's')
+ else if (*fmt != 's')
sprint_symbol(sym, value);
else
sprint_symbol_no_offset(sym, value);
@@ -1872,32 +1893,25 @@ char *flags_string(char *buf, char *end, void *flags_ptr,
return format_flags(buf, end, flags, names);
}
-static const char *device_node_name_for_depth(const struct device_node *np, int depth)
-{
- for ( ; np && depth; depth--)
- np = np->parent;
-
- return kbasename(np->full_name);
-}
-
static noinline_for_stack
-char *device_node_gen_full_name(const struct device_node *np, char *buf, char *end)
+char *fwnode_full_name_string(struct fwnode_handle *fwnode, char *buf,
+ char *end)
{
int depth;
- const struct device_node *parent = np->parent;
- /* special case for root node */
- if (!parent)
- return string_nocheck(buf, end, "/", default_str_spec);
+ /* Loop starting from the root node to the current node. */
+ for (depth = fwnode_count_parents(fwnode); depth >= 0; depth--) {
+ struct fwnode_handle *__fwnode =
+ fwnode_get_nth_parent(fwnode, depth);
- for (depth = 0; parent->parent; depth++)
- parent = parent->parent;
-
- for ( ; depth >= 0; depth--) {
- buf = string_nocheck(buf, end, "/", default_str_spec);
- buf = string(buf, end, device_node_name_for_depth(np, depth),
+ buf = string(buf, end, fwnode_get_name_prefix(__fwnode),
+ default_str_spec);
+ buf = string(buf, end, fwnode_get_name(__fwnode),
default_str_spec);
+
+ fwnode_handle_put(__fwnode);
}
+
return buf;
}
@@ -1921,6 +1935,9 @@ char *device_node_string(char *buf, char *end, struct device_node *dn,
struct printf_spec str_spec = spec;
str_spec.field_width = -1;
+ if (fmt[0] != 'F')
+ return error_string(buf, end, "(%pO?)", spec);
+
if (!IS_ENABLED(CONFIG_OF))
return error_string(buf, end, "(%pOF?)", spec);
@@ -1942,10 +1959,11 @@ char *device_node_string(char *buf, char *end, struct device_node *dn,
switch (*fmt) {
case 'f': /* full_name */
- buf = device_node_gen_full_name(dn, buf, end);
+ buf = fwnode_full_name_string(of_fwnode_handle(dn), buf,
+ end);
break;
case 'n': /* name */
- p = kbasename(of_node_full_name(dn));
+ p = fwnode_get_name(of_fwnode_handle(dn));
precision = str_spec.precision;
str_spec.precision = strchrnul(p, '@') - p;
buf = string(buf, end, p, str_spec);
@@ -1955,7 +1973,7 @@ char *device_node_string(char *buf, char *end, struct device_node *dn,
buf = number(buf, end, (unsigned int)dn->phandle, num_spec);
break;
case 'P': /* path-spec */
- p = kbasename(of_node_full_name(dn));
+ p = fwnode_get_name(of_fwnode_handle(dn));
if (!p[1])
p = "/";
buf = string(buf, end, p, str_spec);
@@ -1993,15 +2011,34 @@ char *device_node_string(char *buf, char *end, struct device_node *dn,
return widen_string(buf, buf - buf_start, end, spec);
}
-static char *kobject_string(char *buf, char *end, void *ptr,
- struct printf_spec spec, const char *fmt)
+static noinline_for_stack
+char *fwnode_string(char *buf, char *end, struct fwnode_handle *fwnode,
+ struct printf_spec spec, const char *fmt)
{
- switch (fmt[1]) {
- case 'F':
- return device_node_string(buf, end, ptr, spec, fmt + 1);
+ struct printf_spec str_spec = spec;
+ char *buf_start = buf;
+
+ str_spec.field_width = -1;
+
+ if (*fmt != 'w')
+ return error_string(buf, end, "(%pf?)", spec);
+
+ if (check_pointer(&buf, end, fwnode, spec))
+ return buf;
+
+ fmt++;
+
+ switch (*fmt) {
+ case 'P': /* name */
+ buf = string(buf, end, fwnode_get_name(fwnode), str_spec);
+ break;
+ case 'f': /* full_name */
+ default:
+ buf = fwnode_full_name_string(fwnode, buf, end);
+ break;
}
- return error_string(buf, end, "(%pO?)", spec);
+ return widen_string(buf, buf - buf_start, end, spec);
}
/*
@@ -2016,9 +2053,9 @@ static char *kobject_string(char *buf, char *end, void *ptr,
*
* - 'S' For symbolic direct pointers (or function descriptors) with offset
* - 's' For symbolic direct pointers (or function descriptors) without offset
- * - 'F' Same as 'S'
- * - 'f' Same as 's'
- * - '[FfSs]R' as above with __builtin_extract_return_addr() translation
+ * - '[Ss]R' as above with __builtin_extract_return_addr() translation
+ * - '[Ff]' %pf and %pF were obsoleted and later removed in favor of
+ * %ps and %pS. Be careful when re-using these specifiers.
* - 'B' For backtraced symbolic direct pointers with offset
* - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref]
* - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201]
@@ -2108,6 +2145,10 @@ static char *kobject_string(char *buf, char *end, void *ptr,
* F device node flags
* c major compatible string
* C full compatible string
+ * - 'fw[fP]' For a firmware node (struct fwnode_handle) pointer
+ * Without an option prints the full name of the node
+ * f full name
+ * P node name, including a possible unit address
* - 'x' For printing the address. Equivalent to "%lx".
*
* ** When making changes please also update:
@@ -2121,8 +2162,6 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
struct printf_spec spec)
{
switch (*fmt) {
- case 'F':
- case 'f':
case 'S':
case 's':
ptr = dereference_symbol_descriptor(ptr);
@@ -2184,9 +2223,16 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
case 'G':
return flags_string(buf, end, ptr, spec, fmt);
case 'O':
- return kobject_string(buf, end, ptr, spec, fmt);
+ return device_node_string(buf, end, ptr, spec, fmt + 1);
+ case 'f':
+ return fwnode_string(buf, end, ptr, spec, fmt + 1);
case 'x':
return pointer_string(buf, end, ptr, spec);
+ case 'e':
+ /* %pe with a non-ERR_PTR gets treated as plain %p */
+ if (!IS_ERR(ptr))
+ break;
+ return err_ptr(buf, end, ptr, spec);
}
/* default is to _not_ leak addresses, hash before printing */
@@ -2819,10 +2865,9 @@ int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args)
/* Dereference of functions is still OK */
case 'S':
case 's':
- case 'F':
- case 'f':
case 'x':
case 'K':
+ case 'e':
save_arg(void *);
break;
default:
@@ -2999,6 +3044,7 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
case 'f':
case 'x':
case 'K':
+ case 'e':
process = true;
break;
default:
generated by cgit v1.2.3-70-g09d2 (git 2.51.1) at 2025-11-04 02:23:14 +0000