/trunk/kernel/arch/amd64/include/context_offset.h |
---|
37,7 → 37,12 |
#define OFFSET_R13 0x28 |
#define OFFSET_R14 0x30 |
#define OFFSET_R15 0x38 |
#ifdef KERNEL |
#define OFFSET_IPL 0x40 |
#else |
# define OFFSET_TLS 0x40 |
#endif |
#ifdef __ASM__ |
44,10 → 49,29 |
# ctx: address of the structure with saved context |
# pc: return address |
.macro CONTEXT_SAVE_ARCH_CORE ctx:req pc:req |
movq \pc, OFFSET_PC(\ctx) |
movq %rsp, OFFSET_SP(\ctx) |
movq %rbx, OFFSET_RBX(\ctx) |
movq %rbp, OFFSET_RBP(\ctx) |
movq %r12, OFFSET_R12(\ctx) |
movq %r13, OFFSET_R13(\ctx) |
movq %r14, OFFSET_R14(\ctx) |
movq %r15, OFFSET_R15(\ctx) |
.endm |
# ctx: address of the structure with saved context |
.macro CONTEXT_RESTORE_ARCH_CORE ctx:req pc:req |
movq OFFSET_R15(\ctx), %r15 |
movq OFFSET_R14(\ctx), %r14 |
movq OFFSET_R13(\ctx), %r13 |
movq OFFSET_R12(\ctx), %r12 |
movq OFFSET_RBP(\ctx), %rbp |
movq OFFSET_RBX(\ctx), %rbx |
movq OFFSET_SP(\ctx), %rsp # ctx->sp -> %rsp |
movq OFFSET_PC(\ctx), \pc |
.endm |
#endif |
/trunk/kernel/arch/amd64/src/context.S |
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40,17 → 40,10 |
# |
context_save_arch: |
movq (%rsp), %rdx # the caller's return %eip |
# In %edi is passed 1st argument |
movq %rdx, OFFSET_PC(%rdi) |
movq %rsp, OFFSET_SP(%rdi) |
CONTEXT_SAVE_ARCH_CORE %rdi %rdx |
movq %rbx, OFFSET_RBX(%rdi) |
movq %rbp, OFFSET_RBP(%rdi) |
movq %r12, OFFSET_R12(%rdi) |
movq %r13, OFFSET_R13(%rdi) |
movq %r14, OFFSET_R14(%rdi) |
movq %r15, OFFSET_R15(%rdi) |
xorq %rax,%rax # context_save returns 1 |
incq %rax |
ret |
62,16 → 55,9 |
# pointed by the 1st argument. Returns 0 in EAX. |
# |
context_restore_arch: |
movq OFFSET_R15(%rdi), %r15 |
movq OFFSET_R14(%rdi), %r14 |
movq OFFSET_R13(%rdi), %r13 |
movq OFFSET_R12(%rdi), %r12 |
movq OFFSET_RBP(%rdi), %rbp |
movq OFFSET_RBX(%rdi), %rbx |
movq OFFSET_SP(%rdi), %rsp # ctx->sp -> %rsp |
CONTEXT_RESTORE_ARCH_CORE %rdi %rdx |
movq OFFSET_PC(%rdi), %rdx |
movq %rdx,(%rsp) |
xorq %rax,%rax # context_restore returns 0 |