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base: save FPU registers in '_jmp_slot' function (x86_64)

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Issue #3355
This commit is contained in:
Christian Prochaska
2019-04-02 20:06:02 +02:00
committed by Christian Helmuth
parent 9923a1bf50
commit c2c33d6808
1 changed files with 9 additions and 4 deletions
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13
repos/base/src/lib/ldso/spec/x86_64/jmp_slot.s
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@@ -27,16 +27,21 @@ _jmp_slot:
pushq %r9
pushq %r10
pushq %r11
subq $0x200, %rsp
fxsave (%rsp)
/* obj pointer */
movq 0x58(%rsp), %rdi
movq 0x258(%rsp), %rdi
/* relocation index */
movq 0x60(%rsp), %rsi
movq 0x260(%rsp), %rsi
call jmp_slot@PLT
/* rax now contains target symbol address */
movq %rax, 0x60(%rsp)
/* rax now contains target symbol address */
movq %rax, 0x260(%rsp)
fxrstor (%rsp)
addq $0x200, %rsp
popq %r11
popq %r10
popq %r9