syscall_emul: [PATCH 15/22] add clone/execve for threading and multiprocess simulations

Modifies the clone system call and adds execve system call. Requires allowing
processes to steal thread contexts from other processes in the same system
object and the ability to detach pieces of process state (such as MemState)
to allow dynamic sharing.

1 files changed, 6 insertions, 5 deletions

diff --git a/src/gpu-compute/shader.cc b/src/gpu-compute/shader.cc
index e47edce2c..6deaaab94 100644
--- a/src/gpu-compute/shader.cc
+++ b/src/gpu-compute/shader.cc
@@ -79,18 +79,19 @@ Shader::mmap(int length)
     length = roundUp(length, TheISA::PageBytes);
 
     Process *proc = gpuTc->getProcessPtr();
+    auto mem_state = proc->memState;
 
     if (proc->mmapGrowsDown()) {
         DPRINTF(HSAIL, "GROWS DOWN");
-        start = proc->mmap_end - length;
-        proc->mmap_end = start;
+        start = mem_state->mmapEnd - length;
+        mem_state->mmapEnd = start;
     } else {
         DPRINTF(HSAIL, "GROWS UP");
-        start = proc->mmap_end;
-        proc->mmap_end += length;
+        start = mem_state->mmapEnd;
+        mem_state->mmapEnd += length;
 
         // assertion to make sure we don't overwrite the stack (it grows down)
-        assert(proc->mmap_end < proc->stack_base - proc->max_stack_size);
+        assert(mem_state->stackBase - proc->maxStackSize > mem_state->mmapEnd);
     }
 
     DPRINTF(HSAIL,"Shader::mmap start= %#x, %#x\n", start, length);