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document paged mode return stack references

This commit is contained in:
Dan Luu 2013-03-18 10:45:03 -04:00
parent c7f1fbc25d
commit 84b86f442b
1 changed files with 3 additions and 2 deletions
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5
cpux86-ta.js
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@ -4521,7 +4521,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, interrupt) {
} }
{ {
mem8_loc = (qe + (esp & SS_mask)) & -1; mem8_loc = (qe + (esp & SS_mask)) & -1;
selector = ld32_mem8_kernel_read(); selector = ld32_mem8_kernel_read(); //CS selector
esp = (esp + 4) & -1; esp = (esp + 4) & -1;
} }
selector &= 0xffff; selector &= 0xffff;
@ -4531,12 +4531,13 @@ CPU_X86.prototype.exec_internal = function(N_cycles, interrupt) {
stack_eflags = ld32_mem8_kernel_read(); stack_eflags = ld32_mem8_kernel_read();
esp = (esp + 4) & -1; esp = (esp + 4) & -1;
} }
if (stack_eflags & 0x00020000) { if (stack_eflags & 0x00020000) { //eflags.VM (return to v86 mode)
{ {
mem8_loc = (qe + (esp & SS_mask)) & -1; mem8_loc = (qe + (esp & SS_mask)) & -1;
wd = ld32_mem8_kernel_read(); wd = ld32_mem8_kernel_read();
esp = (esp + 4) & -1; esp = (esp + 4) & -1;
} }
//pop segment selectors from stack
{ {
mem8_loc = (qe + (esp & SS_mask)) & -1; mem8_loc = (qe + (esp & SS_mask)) & -1;
gf = ld32_mem8_kernel_read(); gf = ld32_mem8_kernel_read();