| /branches/network/uspace/lib/libc/arch/ia32/src/entry.s |
|---|
| 31,10 → 31,10 |
| .org 0 |
| .globl __entry |
| .globl __entry_driver |
| ## User-space task entry point |
| # |
| # %ebx contains the PCB pointer |
| # |
| __entry: |
| mov %ss, %ax |
| 42,19 → 42,9 |
| mov %ax, %es |
| mov %ax, %fs |
| # Do not set %gs, it contains descriptor that can see TLS |
| # Pass the PCB pointer to __main as the first argument |
| pushl %ebx |
| call __main |
| call __io_init |
| call main |
| call __exit |
| __entry_driver: |
| mov %ss, %ax |
| mov %ax, %ds |
| mov %ax, %es |
| mov %ax, %fs |
| # Do not set %gs, it contains descriptor that can see TLS |
| call __main |
| call main |
| call __exit |
| /branches/network/uspace/lib/libc/arch/ia32/src/syscall.S |
|---|
| 53,4 → 53,3 |
| popl %esi |
| popl %ebx |
| ret |
| /branches/network/uspace/lib/libc/arch/ia32/src/setjmp.S |
|---|
| 26,6 → 26,8 |
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| #include <kernel/arch/context_offset.h> |
| .text |
| .global setjmp |
| .global longjmp |
| 32,18 → 34,13 |
| .type setjmp,@function |
| setjmp: |
| movl 0(%esp), %ecx # save current pc |
| leal 4(%esp), %edx # save stack pointer |
| movl (%edx), %eax # get jmp_buf pointer |
| movl 0(%esp),%eax # save pc value into eax |
| movl 4(%esp),%edx # address of the jmp_buf structure to save context to |
| # Save registers |
| movl %ebx, 0(%eax) |
| movl %esi, 4(%eax) |
| movl %edi, 8(%eax) |
| movl %ebp, 12(%eax) |
| movl %edx, 16(%eax) |
| # save registers to the jmp_buf structure |
| CONTEXT_SAVE_ARCH_CORE %edx %eax |
| movl %ecx, 20(%eax) # save pc |
| xorl %eax,%eax # set_jmp returns 0 |
| ret |
| .type longjmp,@function |
| 52,12 → 49,9 |
| movl 4(%esp), %ecx # put address of jmp_buf into ecx |
| movl 8(%esp), %eax # put return value into eax |
| # restore all registers |
| movl 0(%ecx), %ebx |
| movl 4(%ecx), %esi |
| movl 8(%ecx), %edi |
| movl 12(%ecx), %ebp |
| movl 16(%ecx), %esp |
| movl 20(%ecx), %edx # saved return address |
| jmp *%edx |
| # restore registers from the jmp_buf structure |
| CONTEXT_RESTORE_ARCH_CORE %ecx %edx |
| movl %edx,0(%esp) # put saved pc on stack |
| ret |
| /branches/network/uspace/lib/libc/arch/ia32/src/fibril.S |
|---|
| 26,6 → 26,8 |
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| #include <kernel/arch/context_offset.h> |
| .text |
| .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 |
| 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 the context structure |
| CONTEXT_SAVE_ARCH_CORE %edx %eax |
| # Save TLS |
| movl %gs:0, %eax |
| movl %eax, 24(%edx) # tls -> ctx->tls |
| movl %eax, OFFSET_TLS(%edx) # tls -> ctx->tls |
| 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 |
| # restore registers from the context structure |
| CONTEXT_RESTORE_ARCH_CORE %eax %edx |
| movl %edx,0(%esp) # ctx->pc -> saver's return %eip |
| # 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 |