diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/swapcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/swapcontext.S | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/swapcontext.S b/sysdeps/unix/sysv/linux/x86_64/swapcontext.S index 3dddb3cec2..4394e2ae9f 100644 --- a/sysdeps/unix/sysv/linux/x86_64/swapcontext.S +++ b/sysdeps/unix/sysv/linux/x86_64/swapcontext.S @@ -35,7 +35,8 @@ other than the PRESERVED state. */ ENTRY(__swapcontext) - /* Save the preserved registers and the return address. */ + /* Save the preserved registers, the registers used for passing args, + and the return address. */ movq %rbx, oRBX(%rdi) movq %rbp, oRBP(%rdi) movq %r12, oR12(%rdi) @@ -43,6 +44,13 @@ ENTRY(__swapcontext) movq %r14, oR14(%rdi) movq %r15, oR15(%rdi) + movq %rdi, oRDI(%rdi) + movq %rsi, oRSI(%rdi) + movq %rdx, oRDX(%rdi) + movq %rcx, oRCX(%rdi) + movq %r8, oR8(%rdi) + movq %r9, oR9(%rdi) + movq (%rsp), %rcx movq %rcx, oRIP(%rdi) leaq 8(%rsp), %rcx /* Exclude the return address. */ @@ -95,6 +103,16 @@ ENTRY(__swapcontext) movq oRIP(%rsi), %rcx pushq %rcx + /* Setup registers used for passing args. */ + movq oRDI(%rsi), %rdi + movq oRDX(%rsi), %rdx + movq oRCX(%rsi), %rcx + movq oR8(%rsi), %r8 + movq oR9(%rsi), %r9 + + /* Setup finally %rsi. */ + movq oRSI(%rsi), %rsi + /* Clear rax to indicate success. */ xorq %rax, %rax |