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| author | davidxu <davidxu@FreeBSD.org> | 2004-07-31 14:18:26 +0000 |
|---|---|---|
| committer | davidxu <davidxu@FreeBSD.org> | 2004-07-31 14:18:26 +0000 |
| commit | 7ef444d52780a97f48a99aaf3e972f85045cd862 (patch) | |
| tree | e945cd05a1ab489b27dc253d292e85127280ddd4 /lib/libkse | |
| parent | 7dea99e896c3d75372b2ea8b48b3d4a89b3b660f (diff) | |
| download | FreeBSD-src-7ef444d52780a97f48a99aaf3e972f85045cd862.zip FreeBSD-src-7ef444d52780a97f48a99aaf3e972f85045cd862.tar.gz | |
Save context in kernel fashion, so it can be restored by
kse_switchin syscall.
Diffstat (limited to 'lib/libkse')
| -rw-r--r-- | lib/libkse/arch/amd64/amd64/context.S | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/libkse/arch/amd64/amd64/context.S b/lib/libkse/arch/amd64/amd64/context.S index 2510021..9e6ed74 100644 --- a/lib/libkse/arch/amd64/amd64/context.S +++ b/lib/libkse/arch/amd64/amd64/context.S @@ -106,15 +106,17 @@ __FBSDID("$FreeBSD$"); #define MC_R15 (15 * 8) #define MC_FLAGS (18 * 8) #define MC_RIP (20 * 8) +#define MC_CS (21 * 8) #define MC_RFLAGS (22 * 8) #define MC_RSP (23 * 8) +#define MC_SS (24 * 8) #define REDZONE 128 /* size of the red zone */ /* * _amd64_ctx_save(mcontext_t *mcp) * - * No values are saved to mc_trapno, mc_addr, mc_err, mc_cs, or mc_ss. + * No values are saved to mc_trapno, mc_addr, mc_err and mc_cs. * For the FPU state, only the floating point control word is stored. */ ENTRY(_amd64_save_context) @@ -145,9 +147,10 @@ ENTRY(_amd64_save_context) movq %rsp, %rax /* setcontext pushes the return */ addq $8, %rax /* address onto the stack; */ movq %rax, MC_RSP(%rdi) /* account for this -- ???. */ + movw %ss, MC_SS(%rdi) fnstcw MC_FP_CW_OFFSET(%rdi) /* save FPU control word */ movq $MC_OWNEDFP_NONE, MC_OWNEDFP_OFFSET(%rdi) /* no FP */ - /*movq $MC_FPFMT_NODEV, MC_FPFMT_OFFSET(%rdi)*/ /* unused for amd64 */ + movq $MC_FPFMT_NODEV, MC_FPFMT_OFFSET(%rdi) movq $MC_SIZE, MC_LEN_OFFSET(%rdi) xorq %rax, %rax /* return 0 */ 2: ret |
