| 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 */ |