70,8 → 70,11 |
/* set first parameter */ |
ustate.r0 = (uintptr_t) kernel_uarg->uspace_uarg; |
|
/* %r1 is defined to hold pcb_ptr - set it to 0 */ |
ustate.r1 = 0; |
|
/* clear other registers */ |
ustate.r1 = ustate.r2 = ustate.r3 = ustate.r4 = ustate.r5 = |
ustate.r2 = ustate.r3 = ustate.r4 = ustate.r5 = |
ustate.r6 = ustate.r7 = ustate.r8 = ustate.r9 = ustate.r10 = |
ustate.r11 = ustate.r12 = ustate.lr = 0; |
|
87,12 → 90,11 |
|
/* set user mode, set registers, jump */ |
asm volatile ( |
"mov sp, %0 \n" |
"msr spsr_c, %1 \n" |
"ldmfd sp!, {r0-r12, sp, lr}^ \n" |
"mov sp, %[ustate]\n" |
"msr spsr_c, %[user_mode]\n" |
"ldmfd sp!, {r0-r12, sp, lr}^\n" |
"ldmfd sp!, {pc}^\n" |
: |
: "r" (&ustate), "r" (user_mode) |
:: [ustate] "r" (&ustate), [user_mode] "r" (user_mode) |
); |
|
/* unreachable */ |