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Code Issues Releases Activity

Fix resume.

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This commit is contained in:
Konstantin Belousov 2010-03-08 15:51:39 +02:00
parent 43ed5b3e56
commit 0f1c0f5f66
3 changed files with 31 additions and 3 deletions
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8
src/x86_64/Gresume.c
View file

@ -45,7 +45,6 @@ my_rt_sigreturn (void *new_sp)
"syscall"
:: "r"(new_sp), "i"(SYS_rt_sigreturn)
: "memory");
abort ();
}
#endif
@ -63,17 +62,20 @@ x86_64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
if (unlikely (c->sigcontext_format != X86_64_SCF_NONE))
{
#if defined __linux__
struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
Debug (8, "resuming at ip=%llx via sigreturn(%p)\n",
(unsigned long long) c->dwarf.ip, sc);
#if defined __linux__
my_rt_sigreturn (sc);
#elif defined __FreeBSD__
sigreturn((char *)(c->uc) - FREEBSD_UC_MCONTEXT_OFF);
Debug (8, "resuming at ip=%llx via sigreturn(%p)\n",
(unsigned long long) c->dwarf.ip, uc);
sigreturn(uc);
#else
#error Port me
#endif
abort();
}
else
{

16
src/x86_64/getcontext.S
View file

@ -66,6 +66,22 @@ _Ux86_64_getcontext:
fxsave UC_MCONTEXT_FPSTATE(%rdi)
movq $UC_MCONTEXT_FPOWNED_FPU,UC_MCONTEXT_OWNEDFP(%rdi)
movq $UC_MCONTEXT_FPFMT_XMM,UC_MCONTEXT_FPFORMAT(%rdi)
/* Save rflags and segment registers, so that sigreturn(2)
does not complain. */
pushfq
popq UC_MCONTEXT_RFLAGS(%rdi)
movl $0, UC_MCONTEXT_FLAGS(%rdi)
movw %cs, UC_MCONTEXT_CS(%rdi)
movw %ss, UC_MCONTEXT_SS(%rdi)
#if 0
/* Setting the flags to 0 above disables restore of segment
registers from the context */
movw %ds, UC_MCONTEXT_DS(%rdi)
movw %es, UC_MCONTEXT_ES(%rdi)
movw %fs, UC_MCONTEXT_FS(%rdi)
movw %gs, UC_MCONTEXT_GS(%rdi)
#endif
movq $UC_MCONTEXT_MC_LEN_VAL, UC_MCONTEXT_MC_LEN(%rdi)
#else
#error Port me
#endif

10
src/x86_64/ucontext_i.h
View file

@ -61,10 +61,20 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#define UC_MCONTEXT_GREGS_RCX 0x30
#define UC_MCONTEXT_GREGS_RSP 0xc8
#define UC_MCONTEXT_GREGS_RIP 0xb0
#define UC_MCONTEXT_RFLAGS 0xc0
#define UC_MCONTEXT_FLAGS 0xa0
#define UC_MCONTEXT_CS 0xb8
#define UC_MCONTEXT_SS 0xd0
#define UC_MCONTEXT_DS 0xa6
#define UC_MCONTEXT_ES 0xa4
#define UC_MCONTEXT_FS 0x94
#define UC_MCONTEXT_GS 0x96
#define UC_MCONTEXT_MC_LEN 0xd8
#define UC_MCONTEXT_FPSTATE 0xf0
#define UC_MCONTEXT_OWNEDFP 0xe8
#define UC_MCONTEXT_FPFORMAT 0xe0
#define UC_MCONTEXT_FPOWNED_FPU 0x20001
#define UC_MCONTEXT_FPFMT_XMM 0x10002
#define UC_MCONTEXT_MC_LEN_VAL 0x320
#endif