diff options
| author | Vasily Gorbik <gor@linux.ibm.com> | 2024-11-20 18:10:55 +0300 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2025-01-26 19:23:59 +0300 |
| commit | 9291d572fe5b887ae1d93e9b40d8fd6ad10c2f30 (patch) | |
| tree | 42dfa318efd0eb38f169f327a79db0f6bbad1615 /arch/s390 | |
| parent | dccac2b22b1cabb37b141f7df5bebbcf10a2b44d (diff) | |
| download | linux-9291d572fe5b887ae1d93e9b40d8fd6ad10c2f30.tar.xz | |
s390/boot: Add length modifiers to boot_printk()
Add support for the 'l', 'h', 'hh', and 'z' length modifiers.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/boot/printk.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/arch/s390/boot/printk.c b/arch/s390/boot/printk.c index 313b11daa353..7379fdc9831f 100644 --- a/arch/s390/boot/printk.c +++ b/arch/s390/boot/printk.c @@ -80,6 +80,13 @@ static noinline char *strsym(void *ip) return buf; } +#define va_arg_len_type(args, lenmod, typemod) \ + ((lenmod == 'l') ? va_arg(args, typemod long) : \ + (lenmod == 'h') ? (typemod short)va_arg(args, typemod int) : \ + (lenmod == 'H') ? (typemod char)va_arg(args, typemod int) : \ + (lenmod == 'z') ? va_arg(args, typemod long) : \ + va_arg(args, typemod int)) + void boot_printk(const char *fmt, ...) { char buf[1024] = { 0 }; @@ -87,6 +94,7 @@ void boot_printk(const char *fmt, ...) unsigned long pad; char *p = buf; va_list args; + char lenmod; va_start(args, fmt); for (; p < end && *fmt; fmt++) { @@ -99,24 +107,26 @@ void boot_printk(const char *fmt, ...) continue; } pad = isdigit(*fmt) ? simple_strtol(fmt, (char **)&fmt, 10) : 0; + lenmod = (*fmt == 'h' || *fmt == 'l' || *fmt == 'z') ? *fmt++ : 0; + if (lenmod == 'h' && *fmt == 'h') { + lenmod = 'H'; + fmt++; + } switch (*fmt) { case 's': + if (lenmod) + goto out; p = buf + strlcat(buf, va_arg(args, char *), sizeof(buf)); break; case 'p': - if (*++fmt != 'S') + if (*++fmt != 'S' || lenmod) goto out; p = buf + strlcat(buf, strsym(va_arg(args, void *)), sizeof(buf)); break; - case 'l': - if (*++fmt != 'x' || end - p <= max(sizeof(long) * 2, pad)) - goto out; - p = as_hex(p, va_arg(args, unsigned long), pad); - break; case 'x': - if (end - p <= max(sizeof(int) * 2, pad)) + if (end - p <= max(sizeof(long) * 2, pad)) goto out; - p = as_hex(p, va_arg(args, unsigned int), pad); + p = as_hex(p, va_arg_len_type(args, lenmod, unsigned), pad); break; default: goto out; |