26,6 → 26,8 |
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
# |
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#include <kernel/arch/context_offset.h> |
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.text |
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.global context_save |
41,16 → 43,12 |
movl 0(%esp),%eax # the caller's return %eip |
movl 4(%esp),%edx # address of the context variable to save context to |
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movl %esp,0(%edx) # %esp -> ctx->sp |
movl %eax,4(%edx) # %eip -> ctx->pc |
movl %ebx,8(%edx) # %ebx -> ctx->ebx |
movl %esi,12(%edx) # %esi -> ctx->esi |
movl %edi,16(%edx) # %edi -> ctx->edi |
movl %ebp,20(%edx) # %ebp -> ctx->ebp |
# save registers to given structure |
CONTEXT_SAVE_ARCH_CORE %edx %eax |
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# Save TLS |
movl %gs:0, %eax |
movl %eax, 24(%edx) # tls -> ctx->tls |
movl %eax, OFFSET_TLS(%edx) # tls -> ctx->tls |
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xorl %eax,%eax # context_save returns 1 |
incl %eax |
64,18 → 62,15 |
# |
context_restore: |
movl 4(%esp),%eax # address of the context variable to restore context from |
movl 0(%eax),%esp # ctx->sp -> %esp |
movl 4(%eax),%edx # ctx->pc -> %edx |
movl 8(%eax),%ebx # ctx->ebx -> %ebx |
movl 12(%eax),%esi # ctx->esi -> %esi |
movl 16(%eax),%edi # ctx->edi -> %edi |
movl 20(%eax),%ebp # ctx->ebp -> %ebp |
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# restore registers from jmp_buf |
CONTEXT_RESTORE_ARCH_CORE %eax %edx |
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movl %edx,0(%esp) # ctx->pc -> saver's return %eip |
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# Set thread local storage |
pushl %edx |
movl 24(%eax), %edx # Set arg1 to TLS addr |
movl OFFSET_TLS(%eax), %edx # Set arg1 to TLS addr |
movl $1, %eax # Syscall SYS_TLS_SET |
int $0x30 |
popl %edx |