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| author | Patrick Williams <iawillia@us.ibm.com> | 2015-11-24 20:27:09 -0600 |
|---|---|---|
| committer | Patrick Williams <iawillia@us.ibm.com> | 2015-12-11 15:30:27 -0600 |
| commit | d0edb877c861c146e97745604a2d1933a4844130 (patch) | |
| tree | 91115d61a0d3faf8d131c49ac7a3b704ec3cb95c /src/kernel/start.S | |
| parent | 105660534e02cb3223dcba7d4f7d6a1ad0433317 (diff) | |
| download | talos-hostboot-d0edb877c861c146e97745604a2d1933a4844130.tar.gz talos-hostboot-d0edb877c861c146e97745604a2d1933a4844130.zip | |
libc support for thread-local storage
RTC: 124148
Change-Id: I055885bc7d7cfc4ebd7cf1a662f677bdf4e28c62
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/22313
Tested-by: Jenkins Server
Reviewed-by: Richard J. Knight <rjknight@us.ibm.com>
Reviewed-by: Brian Silver <bsilver@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>
Diffstat (limited to 'src/kernel/start.S')
| -rw-r--r-- | src/kernel/start.S | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/src/kernel/start.S b/src/kernel/start.S index 6474a2ced..13351b893 100644 --- a/src/kernel/start.S +++ b/src/kernel/start.S @@ -5,7 +5,7 @@ # # OpenPOWER HostBoot Project # -# Contributors Listed Below - COPYRIGHT 2010,2014 +# Contributors Listed Below - COPYRIGHT 2010,2015 # [+] International Business Machines Corp. # # @@ -817,6 +817,26 @@ userspace_task_entry: ;// inserts garbage code into the task_end C function. .global task_end_stub task_end_stub: + // Check for a NULL stack pointer and skip TLS cleanup. + cmpi cr0, r1, 0 + beq 1f + // Check for a NULL TLS-context and skip TLS cleanup. + ld r0, TASK_TLS_CONTEXT(r13) + cmpi cr0, r0, 0 + beq 1f + // Save off r3. + mr r31, r3 + // Set up TOC for __tls_cleanup + lis r2, __tls_cleanup@h + ori r2, r2, __tls_cleanup@l + ld r2, 8(r2) + // Call __tls_cleanup + mr r3, r0 + bl __tls_cleanup + // Restore r3. + mr r3, r31 +1: + // Call task-end syscall. mr r4, r3 ;// Move current rc (r3) to status value (r4) li r3, 2 ;// TASK_END -> r3 (syscall number) sc |
