Updated patch. Since I'm sending this via gmail I do not expect the patch to be copy-paste:able so I attached it. The patch is also viewable at: https://github.com/bluecmd/or1k-linux/commit/5407ab8ce13f2c3f85e733c5d6b5cca5fb35f728.patch
>From 5407ab8ce13f2c3f85e733c5d6b5cca5fb35f728 Mon Sep 17 00:00:00 2001 From: Christian Svensson <b...@cmd.nu> Date: Sat, 25 Jan 2014 15:48:54 +0000 Subject: [PATCH] openrisc: Add thread-local storage (TLS) support Historically OpenRISC GCC has reserved r10 which we now use to hold the thread pointer for thread-local storage (TLS). Signed-off-by: Christian Svensson <b...@cmd.nu> --- arch/openrisc/kernel/process.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c index 386af25..6386097 100644 --- a/arch/openrisc/kernel/process.c +++ b/arch/openrisc/kernel/process.c @@ -173,6 +173,20 @@ copy_thread(unsigned long clone_flags, unsigned long usp, if (usp) userregs->sp = usp; + + /* + * For CLONE_SETTLS set "tp" (r10) to the TLS pointer passed to + * sys_clone. + * + * The kernel entry is: + * int clone (long flags, void *child_stack, int *parent_tid, + * int *child_tid, struct void *tls) + * + * This makes the source r7. + */ + if (clone_flags & CLONE_SETTLS) + userregs->gpr[10] = userregs->gpr[7]; + userregs->gpr[11] = 0; /* Result from fork() */ kregs->gpr[20] = 0; /* Userspace thread */ -- 1.9.3
or1k-tls.patch
Description: Binary data
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