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| author | The Android Open Source Project <initial-contribution@android.com> | 2010-03-22 15:55:09 -0700 |
|---|---|---|
| committer | The Android Open Source Project <initial-contribution@android.com> | 2010-03-22 15:55:09 -0700 |
| commit | 377d4c979dee3dcb5929e8f7a68a53c2407259ab (patch) | |
| tree | 1783fe0272f1437faabfe8365e615696eb8d374c /libc/arch-x86/bionic | |
| parent | 709a898de82128c065381e258e8e71f0a55df976 (diff) | |
| parent | 1825fb5d5f214849e39d95660795a0d3633f8eeb (diff) | |
| download | bionic-377d4c979dee3dcb5929e8f7a68a53c2407259ab.zip bionic-377d4c979dee3dcb5929e8f7a68a53c2407259ab.tar.gz bionic-377d4c979dee3dcb5929e8f7a68a53c2407259ab.tar.bz2 | |
merge from open-source master
Change-Id: I70266ee8c520b216773f267e46c8273d2334c31d
Diffstat (limited to 'libc/arch-x86/bionic')
| -rw-r--r-- | libc/arch-x86/bionic/syscall.S | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/libc/arch-x86/bionic/syscall.S b/libc/arch-x86/bionic/syscall.S new file mode 100644 index 0000000..71abe6b --- /dev/null +++ b/libc/arch-x86/bionic/syscall.S @@ -0,0 +1,52 @@ +/* + * Generic syscall call. + * Upon entry + * %eax: system call number + * %ebx: arg0 to system call + * %ecx: arg.. + * %edx: arg.. + * %esi: arg.. + * %edi: arg.. + * We push these (to save them) load them up with the + * values from the calling frame (not all will actually be valid) + * and make the syscall. + */ + +#include <sys/linux-syscalls.h> + + .text + .type syscall, @function + .globl syscall + .align 4 + +syscall: + push %eax + push %ebx + push %ecx + push %edx + push %esi + push %edi + mov 28(%esp),%eax + mov 32(%esp),%ebx + mov 36(%esp),%ecx + mov 40(%esp),%edx + mov 44(%esp),%esi + mov 48(%esp),%edi + + int $0x80 + + cmpl $-129, %eax + jb 1f + negl %eax + pushl %eax + call __set_errno + addl $4, %esp + orl $-1, %eax +1: + pop %edi + pop %esi + pop %edx + pop %ecx + pop %ebx + pop %eax + ret |