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| author | Renato Botelho <renato@netgate.com> | 2016-10-12 11:41:26 -0300 |
|---|---|---|
| committer | Renato Botelho <renato@netgate.com> | 2016-10-12 11:41:26 -0300 |
| commit | cb642130dfc50717bb970a104c44aa7690930a38 (patch) | |
| tree | c67f108534217a209198c6b201949ecc73acaba3 /sys/arm/arm/swtch-v6.S | |
| parent | 5dd7ab172435dc99e1abc1f7d73fd5e720050bbc (diff) | |
| parent | cd04fbc5e631c6b3e80a14eb7044c3be35fba2d2 (diff) | |
| download | FreeBSD-src-cb642130dfc50717bb970a104c44aa7690930a38.zip FreeBSD-src-cb642130dfc50717bb970a104c44aa7690930a38.tar.gz | |
Merge remote-tracking branch 'origin/stable/11' into devel-11
Diffstat (limited to 'sys/arm/arm/swtch-v6.S')
| -rw-r--r-- | sys/arm/arm/swtch-v6.S | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sys/arm/arm/swtch-v6.S b/sys/arm/arm/swtch-v6.S index d63661a..8bbaac9 100644 --- a/sys/arm/arm/swtch-v6.S +++ b/sys/arm/arm/swtch-v6.S @@ -291,6 +291,8 @@ ENTRY(cpu_switch) ldr r3, [r0, #(TD_PCB)] add r3, #(PCB_R4) stmia r3, {r4-r12, sp, lr, pc} + mrc CP15_TPIDRURW(r4) + str r4, [r3, #(PCB_TPIDRURW - PCB_R4)] #ifdef INVARIANTS cmp r1, #0 /* new thread? */ @@ -437,9 +439,6 @@ sw1: cmp r3, r6 beq 1b #endif - /* Set the new tls */ - ldr r0, [r11, #(TD_MD + MD_TP)] - mcr CP15_TPIDRURO(r0) /* write tls thread reg 2 */ /* We have a new curthread now so make a note it */ str r11, [r8, #PC_CURTHREAD] @@ -452,7 +451,14 @@ sw1: * Restore all saved registers and return. Note that some saved * registers can be changed when either cpu_fork(), cpu_copy_thread(), * cpu_fork_kthread_handler(), or makectx() was called. + * + * The value of TPIDRURW is also written into TPIDRURO, as + * userspace still uses TPIDRURO, modifying it through + * sysarch(ARM_SET_TP, addr). */ + ldr r3, [r7, #PCB_TPIDRURW] + mcr CP15_TPIDRURW(r3) /* write tls thread reg 2 */ + mcr CP15_TPIDRURO(r3) /* write tls thread reg 3 */ add r3, r7, #PCB_R4 ldmia r3, {r4-r12, sp, pc} |
