Date: Fri, 25 Apr 2003 14:10:38 -0700 (PDT) From: Peter Wemm <peter@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 29730 for review Message-ID: <200304252110.h3PLAcQu028305@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=29730 Change 29730 by peter@peter_daintree on 2003/04/25 14:10:23 Add a pcpu variable for storing the user stack pointer during a syscall instruction. All the scratch registers are used up :-(. Affected files ... .. //depot/projects/hammer/sys/x86_64/include/pcpu.h#9 edit .. //depot/projects/hammer/sys/x86_64/x86_64/genassym.c#23 edit Differences ... ==== //depot/projects/hammer/sys/x86_64/include/pcpu.h#9 (text+ko) ==== @@ -39,7 +39,8 @@ * other processors" */ #define PCPU_MD_FIELDS \ - struct pcpu *pc_prvspace; /* Self-reference */ \ + struct pcpu *pc_prvspace; /* Self-reference */ \ + register_t pc_scratch_rsp; /* User %rsp in syscall */ #if defined(lint) ==== //depot/projects/hammer/sys/x86_64/x86_64/genassym.c#23 (text+ko) ==== @@ -168,6 +168,7 @@ ASSYM(PC_IDLETHREAD, offsetof(struct pcpu, pc_idlethread)); ASSYM(PC_CURPCB, offsetof(struct pcpu, pc_curpcb)); ASSYM(PC_CPUID, offsetof(struct pcpu, pc_cpuid)); +ASSYM(PC_SCRATCH_RSP, offsetof(struct pcpu, pc_scratch_rsp)); ASSYM(KCSEL, GSEL(GCODE_SEL, SEL_KPL)); ASSYM(KDSEL, GSEL(GDATA_SEL, SEL_KPL));
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