Augment kldxref to find the new MODULE_PNP_INFO records now in
modules, simplify them into a more normal form and write them to linker.hints. Differential Review: https://reviews.freebsd.org/D3461
This commit is contained in:
Warner Losh
parent
da82615ae2
commit
493b2041d6
@ -34,6 +34,7 @@
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/endian.h>
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#include <sys/exec.h>
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#include <sys/queue.h>
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#include <sys/kernel.h>
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@ -53,7 +54,7 @@
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#include "ef.h"
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#define MAXRECSIZE 8192
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#define MAXRECSIZE (64 << 10) /* 64k */
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#define check(val) if ((error = (val)) != 0) break
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static int dflag; /* do not create a hint file, only write on stdout */
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@ -134,14 +135,244 @@ record_string(const char *str)
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return record_buf(str, len);
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}
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/* From sys/isa/pnp.c */
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static char *
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pnp_eisaformat(uint32_t id)
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{
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uint8_t *data;
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static char idbuf[8];
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const char hextoascii[] = "0123456789abcdef";
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id = htole32(id);
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data = (uint8_t *)&id;
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idbuf[0] = '@' + ((data[0] & 0x7c) >> 2);
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idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5));
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idbuf[2] = '@' + (data[1] & 0x1f);
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idbuf[3] = hextoascii[(data[2] >> 4)];
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idbuf[4] = hextoascii[(data[2] & 0xf)];
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idbuf[5] = hextoascii[(data[3] >> 4)];
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idbuf[6] = hextoascii[(data[3] & 0xf)];
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idbuf[7] = 0;
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return(idbuf);
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}
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struct pnp_elt
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{
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int pe_kind; /* What kind of entry */
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#define TYPE_SZ_MASK 0x0f
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#define TYPE_FLAGGED 0x10 /* all f's is a wildcard */
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#define TYPE_INT 0x20 /* Is a number */
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#define TYPE_PAIRED 0x40
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#define TYPE_LE 0x80 /* Matches <= this value */
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#define TYPE_GE 0x100 /* Matches >= this value */
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#define TYPE_MASK 0x200 /* Specifies a mask to follow */
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#define TYPE_U8 (1 | TYPE_INT)
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#define TYPE_V8 (1 | TYPE_INT | TYPE_FLAGGED)
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#define TYPE_G16 (2 | TYPE_INT | TYPE_GE)
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#define TYPE_L16 (2 | TYPE_INT | TYPE_LE)
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#define TYPE_M16 (2 | TYPE_INT | TYPE_MASK)
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#define TYPE_U16 (2 | TYPE_INT)
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#define TYPE_V16 (2 | TYPE_INT | TYPE_FLAGGED)
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#define TYPE_U32 (4 | TYPE_INT)
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#define TYPE_V32 (4 | TYPE_INT | TYPE_FLAGGED)
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#define TYPE_W32 (4 | TYPE_INT | TYPE_PAIRED)
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#define TYPE_D 7
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#define TYPE_Z 8
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#define TYPE_P 9
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#define TYPE_E 10
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#define TYPE_T 11
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int pe_offset; /* Offset within the element */
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char * pe_key; /* pnp key name */
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TAILQ_ENTRY(pnp_elt) next; /* Link */
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};
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typedef TAILQ_HEAD(pnp_head, pnp_elt) pnp_list;
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/*
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* this function finds the data from the pnp table, as described by the
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* the description and creates a new output (new_desc). This output table
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* is a form that's easier for the agent that's automatically loading the
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* modules.
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*
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* The format output is the simplified string from this routine in the
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* same basic format as the pnp string, as documented in sys/module.h.
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* First a string describing the format is output, the a count of the
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* number of records, then each record. The format string also describes
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* the length of each entry (though it isn't a fixed length when strings
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* are present).
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*
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* type Output Meaning
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* I uint32_t Integer equality comparison
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* J uint32_t Pair of uint16_t fields converted to native
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byte order. The two fields both must match.
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* G uint32_t Greater than or equal to
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* L uint32_t Less than or equal to
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* M uint32_t Mask of which fields to test. Fields that
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take up space increment the count. This
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field must be first, and resets the count.
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* D string Description of the device this pnp info is for
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* Z string pnp string must match this
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* T nothing T fields set pnp values that must be true for
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* the entire table.
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* Values are packed the same way that other values are packed in this file.
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* Strings and int32_t's start on a 32-bit boundary and are padded with 0
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* bytes. Objects that are smaller than uint32_t are converted, without
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* sign extension to uint32_t to simplify parsing downstream.
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*/
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static int
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parse_pnp_list(const char *desc, char **new_desc, pnp_list *list)
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{
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const char *walker = desc, *ep = desc + strlen(desc);
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const char *colon, *semi;
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struct pnp_elt *elt;
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char *nd;
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char type[8], key[32];
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int off;
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off = 0;
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nd = *new_desc = malloc(strlen(desc) + 1);
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if (verbose > 1)
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printf("Converting %s into a list\n", desc);
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while (walker < ep) {
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colon = strchr(walker, ':');
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semi = strchr(walker, ';');
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if (semi != NULL && semi < colon)
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goto err;
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if (colon - walker > sizeof(type))
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goto err;
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strncpy(type, walker, colon - walker);
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type[colon - walker] = '\0';
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if (semi) {
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if (semi - colon >= sizeof(key))
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goto err;
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strncpy(key, colon + 1, semi - colon - 1);
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key[semi - colon - 1] = '\0';
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walker = semi + 1;
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} else {
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if (strlen(colon + 1) >= sizeof(key))
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goto err;
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strcpy(key, colon + 1);
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walker = ep;
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}
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if (verbose > 1)
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printf("Found type %s for name %s\n", type, key);
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/* Skip pointer place holders */
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if (strcmp(type, "P") == 0) {
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off += sizeof(void *);
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continue;
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}
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/*
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* Add a node of the appropriate type
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*/
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elt = malloc(sizeof(struct pnp_elt) + strlen(key) + 1);
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TAILQ_INSERT_TAIL(list, elt, next);
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elt->pe_key = (char *)(elt + 1);
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elt->pe_offset = off;
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if (strcmp(type, "U8") == 0)
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elt->pe_kind = TYPE_U8;
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else if (strcmp(type, "V8") == 0)
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elt->pe_kind = TYPE_V8;
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else if (strcmp(type, "G16") == 0)
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elt->pe_kind = TYPE_G16;
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else if (strcmp(type, "L16") == 0)
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elt->pe_kind = TYPE_L16;
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else if (strcmp(type, "M16") == 0)
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elt->pe_kind = TYPE_M16;
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else if (strcmp(type, "U16") == 0)
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elt->pe_kind = TYPE_U16;
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else if (strcmp(type, "V16") == 0)
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elt->pe_kind = TYPE_V16;
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else if (strcmp(type, "U32") == 0)
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elt->pe_kind = TYPE_U32;
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else if (strcmp(type, "V32") == 0)
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elt->pe_kind = TYPE_V32;
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else if (strcmp(type, "W32") == 0)
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elt->pe_kind = TYPE_W32;
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else if (strcmp(type, "D") == 0) /* description char * */
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elt->pe_kind = TYPE_D;
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else if (strcmp(type, "Z") == 0) /* char * to match */
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elt->pe_kind = TYPE_Z;
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else if (strcmp(type, "P") == 0) /* Pointer -- ignored */
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elt->pe_kind = TYPE_P;
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else if (strcmp(type, "E") == 0) /* EISA PNP ID, as uint32_t */
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elt->pe_kind = TYPE_E;
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else if (strcmp(type, "T") == 0)
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elt->pe_kind = TYPE_T;
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else
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goto err;
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/*
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* Maybe the rounding here needs to be more nuanced and/or somehow
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* architecture specific. Fortunately, most tables in the system
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* have sane ordering of types.
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*/
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if (elt->pe_kind & TYPE_INT) {
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elt->pe_offset = roundup2(elt->pe_offset, elt->pe_kind & TYPE_SZ_MASK);
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off = elt->pe_offset + (elt->pe_kind & TYPE_SZ_MASK);
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} else if (elt->pe_kind == TYPE_E) {
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/* Type E stored as Int, displays as string */
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elt->pe_offset = roundup2(elt->pe_offset, sizeof(uint32_t));
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off = elt->pe_offset + sizeof(uint32_t);
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} else if (elt->pe_kind == TYPE_T) {
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/* doesn't actually consume space in the table */
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off = elt->pe_offset;
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} else {
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elt->pe_offset = roundup2(elt->pe_offset, sizeof(void *));
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off = elt->pe_offset + sizeof(void *);
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}
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if (elt->pe_kind & TYPE_PAIRED) {
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char *word, *ctx;
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for (word = strtok_r(key, "/", &ctx);
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word; word = strtok_r(NULL, "/", &ctx)) {
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sprintf(nd, "%c:%s;", elt->pe_kind & TYPE_FLAGGED ? 'J' : 'I',
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word);
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nd += strlen(nd);
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}
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}
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else {
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if (elt->pe_kind & TYPE_FLAGGED)
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*nd++ = 'J';
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else if (elt->pe_kind & TYPE_GE)
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*nd++ = 'G';
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else if (elt->pe_kind & TYPE_LE)
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*nd++ = 'L';
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else if (elt->pe_kind & TYPE_MASK)
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*nd++ = 'M';
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else if (elt->pe_kind & TYPE_INT)
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*nd++ = 'I';
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else if (elt->pe_kind == TYPE_D)
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*nd++ = 'D';
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else if (elt->pe_kind == TYPE_Z || elt->pe_kind == TYPE_E)
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*nd++ = 'Z';
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else if (elt->pe_kind == TYPE_T)
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*nd++ = 'T';
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else
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errx(1, "Impossible type %x\n", elt->pe_kind);
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*nd++ = ':';
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strcpy(nd, key);
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nd += strlen(nd);
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*nd++ = ';';
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}
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}
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*nd++ = '\0';
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return 0;
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err:
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errx(1, "Parse error of description string %s", desc);
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}
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static int
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parse_entry(struct mod_metadata *md, const char *cval,
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struct elf_file *ef, const char *kldname)
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{
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struct mod_depend mdp;
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struct mod_version mdv;
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struct mod_pnp_match_info pnp;
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char descr[1024];
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Elf_Off data = (Elf_Off)md->md_data;
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int error = 0;
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int error = 0, i, len;
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char *walker;
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void *table;
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record_start();
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switch (md->md_type) {
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@ -173,9 +404,119 @@ parse_entry(struct mod_metadata *md, const char *cval,
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}
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break;
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case MDT_PNP_INFO:
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check(EF_SEG_READ_REL(ef, data, sizeof(pnp), &pnp));
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check(EF_SEG_READ(ef, (Elf_Off)pnp.descr, sizeof(descr), descr));
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descr[sizeof(descr) - 1] = '\0';
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if (dflag) {
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printf(" pnp info for bus %s\n", cval);
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printf(" pnp info for bus %s format %s %d entries of %d bytes\n",
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cval, descr, pnp.num_entry, pnp.entry_len);
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} else {
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pnp_list list;
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struct pnp_elt *elt, *elt_tmp;
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char *new_descr;
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if (verbose > 1)
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printf(" pnp info for bus %s format %s %d entries of %d bytes\n",
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cval, descr, pnp.num_entry, pnp.entry_len);
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/*
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* Parse descr to weed out the chaff and to create a list
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* of offsets to output.
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*/
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TAILQ_INIT(&list);
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parse_pnp_list(descr, &new_descr, &list);
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record_int(MDT_PNP_INFO);
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record_string(cval);
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record_string(new_descr);
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record_int(pnp.num_entry);
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len = pnp.num_entry * pnp.entry_len;
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walker = table = malloc(len);
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check(EF_SEG_READ_REL(ef, (Elf_Off)pnp.table, len, table));
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/*
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* Walk the list and output things. We've collapsed all the
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* variant forms of the table down to just ints and strings.
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*/
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for (i = 0; i < pnp.num_entry; i++) {
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TAILQ_FOREACH(elt, &list, next) {
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uint8_t v1;
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uint16_t v2;
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uint32_t v4;
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int value;
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char buffer[1024];
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if (elt->pe_kind == TYPE_W32) {
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memcpy(&v4, walker + elt->pe_offset, sizeof(v4));
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value = v4 & 0xffff;
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record_int(value);
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if (verbose > 1)
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printf("W32:%#x", value);
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value = (v4 >> 16) & 0xffff;
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record_int(value);
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if (verbose > 1)
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printf(":%#x;", value);
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} else if (elt->pe_kind & TYPE_INT) {
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switch (elt->pe_kind & TYPE_SZ_MASK) {
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case 1:
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memcpy(&v1, walker + elt->pe_offset, sizeof(v1));
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if ((elt->pe_kind & TYPE_FLAGGED) && v1 == 0xff)
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value = -1;
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else
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value = v1;
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break;
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case 2:
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memcpy(&v2, walker + elt->pe_offset, sizeof(v2));
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if ((elt->pe_kind & TYPE_FLAGGED) && v2 == 0xffff)
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value = -1;
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else
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value = v2;
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break;
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case 4:
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memcpy(&v4, walker + elt->pe_offset, sizeof(v4));
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if ((elt->pe_kind & TYPE_FLAGGED) && v4 == 0xffffffff)
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value = -1;
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else
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value = v4;
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break;
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default:
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errx(1, "Invalid size somehow %#x", elt->pe_kind);
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}
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if (verbose > 1)
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printf("I:%#x;", value);
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record_int(value);
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} else if (elt->pe_kind == TYPE_T) {
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/* Do nothing */
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} else { /* E, Z or D -- P already filtered */
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if (elt->pe_kind == TYPE_E) {
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memcpy(&v4, walker + elt->pe_offset, sizeof(v4));
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strcpy(buffer, pnp_eisaformat(v4));
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} else {
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char *ptr;
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ptr = *(char **)(walker + elt->pe_offset);
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buffer[0] = '\0';
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if (ptr != 0) {
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EF_SEG_READ(ef, (Elf_Off)ptr,
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sizeof(buffer), buffer);
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buffer[sizeof(buffer) - 1] = '\0';
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}
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}
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if (verbose > 1)
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printf("%c:%s;", elt->pe_kind == TYPE_E ? 'E' : (elt->pe_kind == TYPE_Z ? 'Z' : 'D'), buffer);
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record_string(buffer);
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}
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}
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if (verbose > 1)
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printf("\n");
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walker += pnp.entry_len;
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}
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/* Now free it */
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TAILQ_FOREACH_SAFE(elt, &list, next, elt_tmp) {
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TAILQ_REMOVE(&list, elt, next);
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free(elt);
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}
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free(table);
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}
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break;
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default:
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warnx("unknown metadata record %d in file %s", md->md_type, kldname);
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}
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