Date: Sun, 04 Jan 2026 09:56:19 +0000 From: Jean-=?utf-8?Q?S=C3=A9bast?==?utf-8?Q?ien P=C3=A9?=dron <dumbbell@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 38d757b6c29c - main - linuxkpi: Avoid trailing whitespaces in lkpi_hex_dump() Message-ID: <695a3943.cd56.2157529c@gitrepo.freebsd.org>
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The branch main has been updated by dumbbell: URL: https://cgit.FreeBSD.org/src/commit/?id=38d757b6c29c990de72dc51ac123922d3f095f53 commit 38d757b6c29c990de72dc51ac123922d3f095f53 Author: Jean-Sébastien Pédron <dumbbell@FreeBSD.org> AuthorDate: 2025-07-26 15:30:40 +0000 Commit: Jean-Sébastien Pédron <dumbbell@FreeBSD.org> CommitDate: 2026-01-04 09:44:52 +0000 linuxkpi: Avoid trailing whitespaces in lkpi_hex_dump() We use the return value of the callback to track the number of bytes written. We use it to determine if a group of characters should be prepended with a whitespace. This way, we never add a trailing whitespace. We need to pay attention to the return value of the callback: if it is negative, it's an error and we return immediately. Otherwise, we would decrease the number of written bytes and possibly make it negative. Reviewed by: bz, christos Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D51558 --- sys/compat/linuxkpi/common/src/linux_compat.c | 66 +++++++++++++++++++++------ 1 file changed, 53 insertions(+), 13 deletions(-) diff --git a/sys/compat/linuxkpi/common/src/linux_compat.c b/sys/compat/linuxkpi/common/src/linux_compat.c index 35430daf311d..03d866260dd9 100644 --- a/sys/compat/linuxkpi/common/src/linux_compat.c +++ b/sys/compat/linuxkpi/common/src/linux_compat.c @@ -1900,47 +1900,87 @@ lkpi_hex_dump(int(*_fpf)(void *, const char *, ...), void *arg1, typedef const struct { uint32_t value; } __packed *print_32p_t; typedef const struct { uint16_t value; } __packed *print_16p_t; const void *buf_old = buf; - int row; + int row, linelen, ret; while (len > 0) { - if (level != NULL) - _fpf(arg1, "%s", level); - if (prefix_str != NULL) - _fpf(arg1, "%s ", prefix_str); + linelen = 0; + if (level != NULL) { + ret = _fpf(arg1, "%s", level); + if (ret < 0) + break; + linelen += ret; + } + if (prefix_str != NULL) { + ret = _fpf( + arg1, "%s%s", linelen ? " " : "", prefix_str); + if (ret < 0) + break; + linelen += ret; + } switch (prefix_type) { case DUMP_PREFIX_ADDRESS: - _fpf(arg1, "[%p] ", buf); + ret = _fpf( + arg1, "%s[%p]", linelen ? " " : "", buf); + if (ret < 0) + return; + linelen += ret; break; case DUMP_PREFIX_OFFSET: - _fpf(arg1, "[%#tx] ", ((const char *)buf - - (const char *)buf_old)); + ret = _fpf( + arg1, "%s[%#tx]", linelen ? " " : "", + ((const char *)buf - (const char *)buf_old)); + if (ret < 0) + return; + linelen += ret; break; default: break; } for (row = 0; row != rowsize; row++) { if (groupsize == 8 && len > 7) { - _fpf(arg1, "%016llx ", ((print_64p_t)buf)->value); + ret = _fpf( + arg1, "%s%016llx", linelen ? " " : "", + ((print_64p_t)buf)->value); + if (ret < 0) + return; + linelen += ret; buf = (const uint8_t *)buf + 8; len -= 8; } else if (groupsize == 4 && len > 3) { - _fpf(arg1, "%08x ", ((print_32p_t)buf)->value); + ret = _fpf( + arg1, "%s%08x", linelen ? " " : "", + ((print_32p_t)buf)->value); + if (ret < 0) + return; + linelen += ret; buf = (const uint8_t *)buf + 4; len -= 4; } else if (groupsize == 2 && len > 1) { - _fpf(arg1, "%04x ", ((print_16p_t)buf)->value); + ret = _fpf( + arg1, "%s%04x", linelen ? " " : "", + ((print_16p_t)buf)->value); + if (ret < 0) + return; + linelen += ret; buf = (const uint8_t *)buf + 2; len -= 2; } else if (len > 0) { - _fpf(arg1, "%02x ", *(const uint8_t *)buf); + ret = _fpf( + arg1, "%s%02x", linelen ? " " : "", + *(const uint8_t *)buf); + if (ret < 0) + return; + linelen += ret; buf = (const uint8_t *)buf + 1; len--; } else { break; } } - _fpf(arg1, "\n"); + ret = _fpf(arg1, "\n"); + if (ret < 0) + break; } }home | help
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