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ircd::ctx: Mark problematic data cache miss instructions; minor tweak.

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This commit is contained in:
Jason Volk 2019-10-07 03:50:24 -07:00
parent 6fec0b3e10
commit f78afbe351
1 changed files with 3 additions and 3 deletions
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6
ircd/ctx_x86_64.S
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@ -44,13 +44,13 @@ jump_fcontext:
movq %rdi, %rax // store transfer_t.fctx (retval) movq %rdi, %rax // store transfer_t.fctx (retval)
// ldmxcsr 0x00(%rsp) // load MMX control- and status-word // ldmxcsr 0x00(%rsp) // load MMX control- and status-word
// fldcw 0x04(%rsp) // load x87 control-word // fldcw 0x04(%rsp) // load x87 control-word
subq $-0x08, %rsp // free fc_mxcsr | fc_x87_cw addq $0x08, %rsp // free fc_mxcsr | fc_x87_cw
pop %r12 // load r12 pop %r12 // load r12 <-- LLd miss
pop %r13 // load r13 pop %r13 // load r13
pop %r14 // load r14 pop %r14 // load r14
pop %r15 // load r15 pop %r15 // load r15
pop %rbx // load rbx pop %rbx // load rbx
pop %rbp // load rbp pop %rbp // load rbp <-- LLd miss
retq // enter context retq // enter context
// mark the size of jump_fcontext // mark the size of jump_fcontext