git: ec5b775403a3 - stable/13 - libproc: replace home grown crc32 with zlib implementation.

From: Xin LI <delphij_at_FreeBSD.org>
Date: Sun, 24 Jul 2022 05:05:20 UTC
The branch stable/13 has been updated by delphij:

URL: https://cgit.FreeBSD.org/src/commit/?id=ec5b775403a3808d029035edfce43fe8237714d1

commit ec5b775403a3808d029035edfce43fe8237714d1
Author:     Xin LI <delphij@FreeBSD.org>
AuthorDate: 2022-07-10 23:31:35 +0000
Commit:     Xin LI <delphij@FreeBSD.org>
CommitDate: 2022-07-24 05:04:56 +0000

    libproc: replace home grown crc32 with zlib implementation.
    
    Differential Revision: https://reviews.freebsd.org/D35766
    
    (cherry picked from commit 0bbf2702963a2fe6f7bb025d5d07ee4195856b8f)
---
 lib/libproc/Makefile     |  5 ++---
 lib/libproc/crc32.c      | 57 ------------------------------------------------
 lib/libproc/crc32.h      | 28 ------------------------
 lib/libproc/proc_sym.c   | 17 ++++++---------
 share/mk/src.libnames.mk |  2 +-
 5 files changed, 10 insertions(+), 99 deletions(-)

diff --git a/lib/libproc/Makefile b/lib/libproc/Makefile
index 80423741e4a9..7fe6dd958ebd 100644
--- a/lib/libproc/Makefile
+++ b/lib/libproc/Makefile
@@ -4,8 +4,7 @@
 
 LIB=	proc
 
-SRCS=	crc32.c			\
-	proc_bkpt.c		\
+SRCS=	proc_bkpt.c		\
 	proc_create.c		\
 	proc_regs.c		\
 	proc_sym.c		\
@@ -24,7 +23,7 @@ LIBADD+=		cxxrt
 LIBADD+=	supcplusplus
 .endif
 
-LIBADD+=	elf procstat rtld_db util
+LIBADD+=	elf procstat rtld_db util z
 
 .if ${MK_CDDL} != "no"
 LIBADD+=	ctf
diff --git a/lib/libproc/crc32.c b/lib/libproc/crc32.c
deleted file mode 100644
index 90f022bc3878..000000000000
--- a/lib/libproc/crc32.c
+++ /dev/null
@@ -1,57 +0,0 @@
-/*-
- *  COPYRIGHT (C) 1986 Gary S. Brown.  You may use this program, or
- *  code or tables extracted from it, as desired without restriction.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <stdint.h>
-
-#include <crc32.h>
-
-uint32_t crc32_tab[] = {
-	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
-	0xe963a535, 0x9e6495a3,	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
-	0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
-	0xf3b97148, 0x84be41de,	0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
-	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,	0x14015c4f, 0x63066cd9,
-	0xfa0f3d63, 0x8d080df5,	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
-	0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,	0x35b5a8fa, 0x42b2986c,
-	0xdbbbc9d6, 0xacbcf940,	0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
-	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
-	0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
-	0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,	0x76dc4190, 0x01db7106,
-	0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
-	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
-	0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
-	0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
-	0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
-	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
-	0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
-	0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
-	0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
-	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
-	0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
-	0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
-	0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
-	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
-	0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
-	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
-	0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
-	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
-	0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
-	0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
-	0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
-	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
-	0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
-	0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
-	0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
-	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
-	0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
-	0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
-	0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
-	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
-	0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
-	0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
-};
diff --git a/lib/libproc/crc32.h b/lib/libproc/crc32.h
deleted file mode 100644
index 3812a83f971f..000000000000
--- a/lib/libproc/crc32.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/*-
- *  COPYRIGHT (C) 1986 Gary S. Brown.  You may use this program, or
- *  code or tables extracted from it, as desired without restriction.
- *
- * $FreeBSD$
- */
-
-#ifndef _CRC32_H_
-#define	_CRC32_H_
-
-#include <stdint.h>	/* uint32_t */
-#include <stdlib.h>	/* size_t */
-
-extern uint32_t crc32_tab[];
-
-static __inline uint32_t
-crc32(const void *buf, size_t size)
-{
-	const uint8_t *p = buf;
-	uint32_t crc;
-
-	crc = ~0U;
-	while (size--)
-		crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
-	return (crc ^ ~0U);
-}
-
-#endif	/* !_CRC32_H_ */
diff --git a/lib/libproc/proc_sym.c b/lib/libproc/proc_sym.c
index ad6673f9f9ba..27b0fc15a2ab 100644
--- a/lib/libproc/proc_sym.c
+++ b/lib/libproc/proc_sym.c
@@ -54,7 +54,7 @@ __FBSDID("$FreeBSD$");
 #endif
 #include <libutil.h>
 
-#include "crc32.h"
+#include <zlib.h>
 #include "_libproc.h"
 
 #define	PATH_DEBUG_DIR	"/usr/lib/debug"
@@ -70,17 +70,14 @@ extern char *__cxa_demangle(const char *, char *, size_t *, int *);
 static int
 crc32_file(int fd, uint32_t *crc)
 {
-	uint8_t buf[PAGE_SIZE], *p;
-	size_t n;
+	char buf[MAXPHYS];
+	ssize_t nr;
 
-	*crc = ~0;
-	while ((n = read(fd, buf, sizeof(buf))) > 0) {
-		p = &buf[0];
-		while (n-- > 0)
-			*crc = crc32_tab[(*crc ^ *p++) & 0xff] ^ (*crc >> 8);
+	*crc = crc32(0L, Z_NULL, 0);
+	while ((nr = read(fd, buf, sizeof(buf))) > 0) {
+		*crc = crc32(*crc, (char *)buf, nr);
 	}
-	*crc = ~*crc;
-	return (n);
+	return (!!nr);
 }
 
 static void
diff --git a/share/mk/src.libnames.mk b/share/mk/src.libnames.mk
index fe606ad3f383..4a7ad1fcb02f 100644
--- a/share/mk/src.libnames.mk
+++ b/share/mk/src.libnames.mk
@@ -330,7 +330,7 @@ _DP_proc=	supcplusplus
 .if ${MK_CDDL} != "no"
 _DP_proc+=	ctf
 .endif
-_DP_proc+=	elf procstat rtld_db util
+_DP_proc+=	elf procstat rtld_db util z
 _DP_mp=	crypto
 _DP_memstat=	kvm
 _DP_magic=	z