diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/getcontext.S | 8 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/setcontext.S | 11 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/swapcontext.S | 17 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/ucontext_i.sym | 3 |
4 files changed, 10 insertions, 29 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/getcontext.S b/sysdeps/unix/sysv/linux/i386/getcontext.S index f86df4d555..9c1df9a2aa 100644 --- a/sysdeps/unix/sysv/linux/i386/getcontext.S +++ b/sysdeps/unix/sysv/linux/i386/getcontext.S @@ -26,13 +26,7 @@ ENTRY(__getcontext) /* Load address of the context data structure. */ movl 4(%esp), %eax - /* Return value of getcontext. EAX is the only register whose - value is not preserved. */ - movl $0, oEAX(%eax) - - /* Save the 32-bit register values and the return address. */ - movl %ecx, oECX(%eax) - movl %edx, oEDX(%eax) + /* Save the preserved register values and the return address. */ movl %edi, oEDI(%eax) movl %esi, oESI(%eax) movl %ebp, oEBP(%eax) diff --git a/sysdeps/unix/sysv/linux/i386/setcontext.S b/sysdeps/unix/sysv/linux/i386/setcontext.S index b4b5c0298c..f042d80bf4 100644 --- a/sysdeps/unix/sysv/linux/i386/setcontext.S +++ b/sysdeps/unix/sysv/linux/i386/setcontext.S @@ -65,22 +65,19 @@ ENTRY(__setcontext) cfi_offset (esi, oESI) cfi_offset (ebp, oEBP) cfi_offset (ebx, oEBX) - cfi_offset (edx, oEDX) - cfi_offset (ecx, oECX) movl oESP(%eax), %esp /* Push the return address on the new stack so we can return there. */ pushl %ecx - /* Load the values of all the 32-bit registers (except ESP). - Since we are loading from EAX, it must be last. */ + /* Load the values of all the preserved registers (except ESP). */ movl oEDI(%eax), %edi movl oESI(%eax), %esi movl oEBP(%eax), %ebp movl oEBX(%eax), %ebx - movl oEDX(%eax), %edx - movl oECX(%eax), %ecx - movl oEAX(%eax), %eax + + /* All done, return 0 for success. */ + xorl %eax, %eax /* End FDE here, we fall into another context. */ cfi_endproc diff --git a/sysdeps/unix/sysv/linux/i386/swapcontext.S b/sysdeps/unix/sysv/linux/i386/swapcontext.S index 792bfdf7e6..090c2d8c3e 100644 --- a/sysdeps/unix/sysv/linux/i386/swapcontext.S +++ b/sysdeps/unix/sysv/linux/i386/swapcontext.S @@ -26,13 +26,7 @@ ENTRY(__swapcontext) /* Load address of the context data structure we save in. */ movl 4(%esp), %eax - /* Return value of swapcontext. EAX is the only register whose - value is not preserved. */ - movl $0, oEAX(%eax) - - /* Save the 32-bit register values and the return address. */ - movl %ecx, oECX(%eax) - movl %edx, oEDX(%eax) + /* Save the preserved register values and the return address. */ movl %edi, oEDI(%eax) movl %esi, oESI(%eax) movl %ebp, oEBP(%eax) @@ -91,15 +85,14 @@ ENTRY(__swapcontext) /* Push the return address on the new stack so we can return there. */ pushl %ecx - /* Load the values of all the 32-bit registers (except ESP). - Since we are loading from EAX, it must be last. */ + /* Load the values of all the preserved registers (except ESP). */ movl oEDI(%eax), %edi movl oESI(%eax), %esi movl oEBP(%eax), %ebp movl oEBX(%eax), %ebx - movl oEDX(%eax), %edx - movl oECX(%eax), %ecx - movl oEAX(%eax), %eax + + /* All done, return 0 for success. */ + xorl %eax, %eax /* The following 'ret' will pop the address of the code and jump to it. */ diff --git a/sysdeps/unix/sysv/linux/i386/ucontext_i.sym b/sysdeps/unix/sysv/linux/i386/ucontext_i.sym index b11a5509cd..1dfe03d2cc 100644 --- a/sysdeps/unix/sysv/linux/i386/ucontext_i.sym +++ b/sysdeps/unix/sysv/linux/i386/ucontext_i.sym @@ -21,9 +21,6 @@ oESI mreg (ESI) oEBP mreg (EBP) oESP mreg (ESP) oEBX mreg (EBX) -oEDX mreg (EDX) -oECX mreg (ECX) -oEAX mreg (EAX) oEIP mreg (EIP) oFPREGS mcontext (fpregs) oSIGMASK ucontext (uc_sigmask) |