diff options
| -rw-r--r-- | sys/amd64/amd64/bios.c | 15 | ||||
| -rw-r--r-- | sys/amd64/include/pc/bios.h | 8 | ||||
| -rw-r--r-- | sys/i386/i386/bios.c | 15 | ||||
| -rw-r--r-- | sys/i386/include/pc/bios.h | 8 |
4 files changed, 46 insertions, 0 deletions
diff --git a/sys/amd64/amd64/bios.c b/sys/amd64/amd64/bios.c index 98c39ba..65f79da 100644 --- a/sys/amd64/amd64/bios.c +++ b/sys/amd64/amd64/bios.c @@ -474,6 +474,21 @@ bios16(struct bios_args *args, char *fmt, ...) return (i); } +const u_char * +bios_string(u_int from, u_int to, const u_char *string, int len) +{ + const char *t, *te; + + if (len == 0) + len = strlen(string); + t = (const char *)(KERNBASE + from); + te = (const char *)(KERNBASE + to); + for (; t <= te; t++) + if (!memcmp(string, t, len)) + return (t); + return (NULL); +} + #ifdef DEV_ISA /* * PnP BIOS interface; enumerate devices only known to the system diff --git a/sys/amd64/include/pc/bios.h b/sys/amd64/include/pc/bios.h index fe1f703..32b6a52 100644 --- a/sys/amd64/include/pc/bios.h +++ b/sys/amd64/include/pc/bios.h @@ -27,6 +27,9 @@ * $FreeBSD$ */ +#ifndef _MACHINE_PC_BIOS_H_ +#define _MACHINE_PC_BIOS_H_ + /* * Signature structure for the BIOS32 Service Directory header */ @@ -278,3 +281,8 @@ struct bios_smap { u_int64_t length; u_int32_t type; } __packed; + +const u_char *bios_string(u_int from, u_int to, const u_char *string, int len); + + +#endif /* _MACHINE_PC_BIOS_H_ */ diff --git a/sys/i386/i386/bios.c b/sys/i386/i386/bios.c index 98c39ba..65f79da 100644 --- a/sys/i386/i386/bios.c +++ b/sys/i386/i386/bios.c @@ -474,6 +474,21 @@ bios16(struct bios_args *args, char *fmt, ...) return (i); } +const u_char * +bios_string(u_int from, u_int to, const u_char *string, int len) +{ + const char *t, *te; + + if (len == 0) + len = strlen(string); + t = (const char *)(KERNBASE + from); + te = (const char *)(KERNBASE + to); + for (; t <= te; t++) + if (!memcmp(string, t, len)) + return (t); + return (NULL); +} + #ifdef DEV_ISA /* * PnP BIOS interface; enumerate devices only known to the system diff --git a/sys/i386/include/pc/bios.h b/sys/i386/include/pc/bios.h index fe1f703..32b6a52 100644 --- a/sys/i386/include/pc/bios.h +++ b/sys/i386/include/pc/bios.h @@ -27,6 +27,9 @@ * $FreeBSD$ */ +#ifndef _MACHINE_PC_BIOS_H_ +#define _MACHINE_PC_BIOS_H_ + /* * Signature structure for the BIOS32 Service Directory header */ @@ -278,3 +281,8 @@ struct bios_smap { u_int64_t length; u_int32_t type; } __packed; + +const u_char *bios_string(u_int from, u_int to, const u_char *string, int len); + + +#endif /* _MACHINE_PC_BIOS_H_ */ |
