From: "Michael Teichgräber" <mt@wmipf.in-berlin.de>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] P9P libthread on Debian ARM vs. makecontext et al.
Date: Tue, 8 Jul 2008 16:05:08 +0200 [thread overview]
Message-ID: <48737414.3000903@wmipf.in-berlin.de> (raw)
In-Reply-To: <6a3ae47e0807080601m30b6da97w782bde83f91055cf@mail.gmail.com>
> The code in Linux.c that implements makecontext() for ARM expects this
> struct to contain a gregs array. I'm guessing that gregs is the same
> as the enumerated arm_* ones above. So, would I be correct in assuming
> that gregs[13] is arm_sp and gregs[14] is arm_lr?
Hi, I would say yes, as SP is r13 and LR is r14 on arm.
To run Russ' libtask on arm7 I used the Linux-arm-asm.s and
the arm-specific makecontext implementation from Linux.c,
as well as the following structures.
M.
--
enum {
NREG = 16,
};
typedef
struct Mcontext
{
u32int gregs[NREG]; /* general registers */
} Mcontext;
typedef
struct ucontext
{
Mcontext uc_mcontext;
sigset_t uc_sigmask;
struct {
void *ss_sp;
u16int ss_size;
} uc_stack;
} ucontext_t;
next prev parent reply other threads:[~2008-07-08 14:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-08 13:01 Robert Raschke
2008-07-08 14:05 ` Michael Teichgräber [this message]
2008-07-08 15:59 ` Robert Raschke
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