diff options
Diffstat (limited to 'proc.h')
| -rw-r--r-- | proc.h | 9 |
1 files changed, 5 insertions, 4 deletions
@@ -3,8 +3,8 @@ #define SEG_KCODE 1 // kernel code #define SEG_KDATA 2 // kernel data+stack #define SEG_KCPU 3 // kernel per-cpu data -#define SEG_UCODE 4 -#define SEG_UDATA 5 +#define SEG_UCODE 4 // user code +#define SEG_UDATA 5 // user data+stack #define SEG_TSS 6 // this process's task state #define NSEGS 7 @@ -16,7 +16,7 @@ // Contexts are stored at the bottom of the stack they // describe; the stack pointer is the address of the context. // The layout of the context matches the layout of the stack in swtch.S -// at "Switch stacks" comment. Switch itself doesn't save eip explicitly, +// at the "Switch stacks" comment. Switch doesn't save eip explicitly, // but it is on the stack and allocproc() manipulates it. struct context { uint edi; @@ -31,7 +31,7 @@ enum procstate { UNUSED, EMBRYO, SLEEPING, RUNNABLE, RUNNING, ZOMBIE }; // Per-process state struct proc { uint sz; // Size of process memory (bytes) - pde_t* pgdir; // linear address of proc's pgdir + pde_t* pgdir; // Linear address of proc's pgdir char *kstack; // Bottom of kernel stack for this process enum procstate state; // Process state volatile int pid; // Process ID @@ -48,6 +48,7 @@ struct proc { // Process memory is laid out contiguously, low addresses first: // text // original data and bss +// invalid page // fixed-size stack // expandable heap |