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| Rev 2613 | Rev 2776 | ||
|---|---|---|---|
| Line 24... | Line 24... | ||
| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | # |
27 | # |
| 28 | 28 | ||
| - | 29 | #include <kernel/arch/context_offset.h> |
|
| - | 30 | ||
| 29 | .text |
31 | .text |
| 30 | 32 | ||
| 31 | .global context_save |
33 | .global context_save |
| 32 | .global context_restore |
34 | .global context_restore |
| 33 | 35 | ||
| Line 39... | Line 41... | ||
| 39 | # |
41 | # |
| 40 | context_save: |
42 | context_save: |
| 41 | movl 0(%esp),%eax # the caller's return %eip |
43 | movl 0(%esp),%eax # the caller's return %eip |
| 42 | movl 4(%esp),%edx # address of the context variable to save context to |
44 | movl 4(%esp),%edx # address of the context variable to save context to |
| 43 | 45 | ||
| 44 | movl %esp,0(%edx) # %esp -> ctx->sp |
- | |
| 45 | movl %eax,4(%edx) # %eip -> ctx->pc |
- | |
| 46 | movl %ebx,8(%edx) # %ebx -> ctx->ebx |
- | |
| 47 | movl %esi,12(%edx) # %esi -> ctx->esi |
46 | # save registers to given structure |
| 48 | movl %edi,16(%edx) # %edi -> ctx->edi |
47 | CONTEXT_SAVE_ARCH_CORE %edx %eax |
| 49 | movl %ebp,20(%edx) # %ebp -> ctx->ebp |
- | |
| 50 | 48 | ||
| 51 | # Save TLS |
49 | # Save TLS |
| 52 | movl %gs:0, %eax |
50 | movl %gs:0, %eax |
| 53 | movl %eax, 24(%edx) # tls -> ctx->tls |
51 | movl %eax, OFFSET_TLS(%edx) # tls -> ctx->tls |
| 54 | 52 | ||
| 55 | xorl %eax,%eax # context_save returns 1 |
53 | xorl %eax,%eax # context_save returns 1 |
| 56 | incl %eax |
54 | incl %eax |
| 57 | ret |
55 | ret |
| 58 | 56 | ||
| Line 62... | Line 60... | ||
| 62 | # Restore CPU context from context_t variable |
60 | # Restore CPU context from context_t variable |
| 63 | # pointed by the 1st argument. Returns 0 in EAX. |
61 | # pointed by the 1st argument. Returns 0 in EAX. |
| 64 | # |
62 | # |
| 65 | context_restore: |
63 | context_restore: |
| 66 | movl 4(%esp),%eax # address of the context variable to restore context from |
64 | movl 4(%esp),%eax # address of the context variable to restore context from |
| - | 65 | ||
| 67 | movl 0(%eax),%esp # ctx->sp -> %esp |
66 | # restore registers from jmp_buf |
| 68 | movl 4(%eax),%edx # ctx->pc -> %edx |
67 | CONTEXT_RESTORE_ARCH_CORE %eax %edx |
| 69 | movl 8(%eax),%ebx # ctx->ebx -> %ebx |
- | |
| 70 | movl 12(%eax),%esi # ctx->esi -> %esi |
- | |
| 71 | movl 16(%eax),%edi # ctx->edi -> %edi |
- | |
| 72 | movl 20(%eax),%ebp # ctx->ebp -> %ebp |
- | |
| 73 | 68 | ||
| 74 | movl %edx,0(%esp) # ctx->pc -> saver's return %eip |
69 | movl %edx,0(%esp) # ctx->pc -> saver's return %eip |
| 75 | 70 | ||
| 76 | # Set thread local storage |
71 | # Set thread local storage |
| 77 | pushl %edx |
72 | pushl %edx |
| 78 | movl 24(%eax), %edx # Set arg1 to TLS addr |
73 | movl OFFSET_TLS(%eax), %edx # Set arg1 to TLS addr |
| 79 | movl $1, %eax # Syscall SYS_TLS_SET |
74 | movl $1, %eax # Syscall SYS_TLS_SET |
| 80 | int $0x30 |
75 | int $0x30 |
| 81 | popl %edx |
76 | popl %edx |
| 82 | 77 | ||
| 83 | xorl %eax,%eax # context_restore returns 0 |
78 | xorl %eax,%eax # context_restore returns 0 |