Imbus/xv6-riscv-kernel
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This commit is contained in:
Frans Kaashoek 2018-10-03 21:00:32 -04:00
parent 7ccc5f5f4f
commit a7ef9a40c4
1 changed files with 4 additions and 4 deletions
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8
swtch.S
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@ -8,7 +8,7 @@
.globl swtch .globl swtch
swtch: swtch:
# Save old callee-save registers # Save old callee-saved registers
push %rbp push %rbp
push %rbx push %rbx
push %r11 push %r11
@ -18,10 +18,10 @@ swtch:
push %r15 push %r15
# Switch stacks # Switch stacks
mov %rsp, (%rdi) # first arg is in rdi mov %rsp, (%rdi) # first arg of swtch is in rdi
mov %rsi, %rsp # second arg is in rsi mov %rsi, %rsp # second arg of swtch is in rsi
# Load new callee-save registers # Load new callee-saved registers
pop %r15 pop %r15
pop %r14 pop %r14
pop %r13 pop %r13