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Save context in kernel fashion, so it can be restored by

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kse_switchin syscall.
This commit is contained in:
David Xu 2004-07-31 14:18:26 +00:00
parent 5f0d8cc327
commit aa087e0e12
2 changed files with 10 additions and 4 deletions
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7
lib/libkse/arch/amd64/amd64/context.S
View File

@ -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

7
lib/libpthread/arch/amd64/amd64/context.S
View File

@ -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