mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-09-27 08:59:28 +02:00
Move x86 porting further.
This commit is contained in:
Konstantin Belousov
parent
71c4161247
commit
e9cd30040e
7 changed files with 248 additions and 44 deletions
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@ -60,8 +60,12 @@ struct cursor
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enum
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{
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X86_SCF_NONE, /* no signal frame encountered */
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X86_SCF_LINUX_SIGFRAME, /* classic x86 sigcontext */
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X86_SCF_LINUX_RT_SIGFRAME /* POSIX ucontext_t */
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X86_SCF_LINUX_SIGFRAME, /* Linux x86 sigcontext */
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X86_SCF_LINUX_RT_SIGFRAME, /* POSIX ucontext_t */
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X86_SCF_FREEBSD_SIGFRAME, /* FreeBSD x86 sigcontext */
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X86_SCF_FREEBSD_SIGFRAME4, /* FreeBSD 4.x x86 sigcontext */
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X86_SCF_FREEBSD_OSIGFRAME, /* FreeBSD pre-4.x x86 sigcontext */
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X86_SCF_FREEBSD_SYSCALL, /* FreeBSD x86 syscall */
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}
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sigcontext_format;
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unw_word_t sigcontext_addr;
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@ -59,9 +59,12 @@ unw_is_signal_frame (unw_cursor_t *cursor)
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ip = c->dwarf.ip;
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if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0
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|| (ret = (*a->access_mem) (as, ip + 4, &w1, 0, arg)) < 0)
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return ret;
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ret = ((w0 == 0x0077b858 && w1 == 0x80cd0000)
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|| (w0 == 0x0000adb8 && w1 == 0x9080cd00));
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return ret;
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ret = X86_SCF_NONE;
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if (w0 == 0x0077b858 && w1 == 0x80cd0000)
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ret = X86_SCF_LINUX_SIGFRAME;
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else if (w0 == 0x0000adb8 && w1 == 0x9080cd00)
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ret = X86_SCF_LINUX_RT_SIGFRAME;
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Debug (16, "returning %d\n", ret);
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return ret;
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#elif defined __FreeBSD__
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@ -100,12 +103,12 @@ XXX
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(ret = (*a->access_mem) (as, ip + 20, &w4, 0, arg)) < 0 ||
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(ret = (*a->access_mem) (as, ip + 24, &w5, 0, arg)) < 0)
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return ret;
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ret = (w0 == 0x2024448d && w1 == 0x5440f750 && w2 == 0x75000200 &&
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w3 == 0x14688e03 && w4 == 0x0001a1b8 && w5 == 0x80cd5000);
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if (ret != 0)
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return (1);
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ret = X86_SCF_NONE;
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if (w0 == 0x2024448d && w1 == 0x5440f750 && w2 == 0x75000200 &&
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w3 == 0x14688e03 && w4 == 0x0001a1b8 && w5 == 0x80cd5000)
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ret = X86_SCF_FREEBSD_SIGFRAME;
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Debug (16, "returning %d\n", ret);
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return (0);
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return (ret);
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#else
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#error Port me
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#endif
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131
src/x86/Gregs.c
131
src/x86/Gregs.c
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@ -26,8 +26,9 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "offsets.h"
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#include "unwind_i.h"
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#if defined __linux__
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static inline dwarf_loc_t
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linux_scratch_loc (struct cursor *c, unw_regnum_t reg)
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get_scratch_loc (struct cursor *c, unw_regnum_t reg)
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{
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unw_word_t addr = c->sigcontext_addr, fpstate_addr, off;
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int ret, is_fpstate = 0;
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@ -132,12 +133,138 @@ linux_scratch_loc (struct cursor *c, unw_regnum_t reg)
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else
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return DWARF_MEM_LOC (c, addr + off);
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}
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#elif defined __FreeBSD__
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static inline dwarf_loc_t
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get_scratch_loc (struct cursor *c, unw_regnum_t reg)
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{
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unw_word_t addr = c->sigcontext_addr, fpstate_addr, off;
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int ret, is_fpstate = 0;
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switch (c->sigcontext_format)
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{
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case X86_SCF_NONE:
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return DWARF_REG_LOC (&c->dwarf, reg);
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case X86_SCF_FREEBSD_SIGFRAME:
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addr += FREEBSD_UC_MCONTEXT_OFF;
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break;
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case X86_SCF_FREEBSD_SIGFRAME4:
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abort();
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break;
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case X86_SCF_FREEBSD_OSIGFRAME:
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/* XXXKIB */
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abort();
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break;
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case X86_SCF_FREEBSD_SYSCALL:
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/* XXXKIB */
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abort();
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break;
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default:
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/* XXXKIB */
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abort();
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break;
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}
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switch (reg)
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{
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case UNW_X86_GS: off = FREEBSD_UC_MCONTEXT_GS_OFF; break;
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case UNW_X86_FS: off = FREEBSD_UC_MCONTEXT_FS_OFF; break;
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case UNW_X86_ES: off = FREEBSD_UC_MCONTEXT_ES_OFF; break;
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case UNW_X86_DS: off = FREEBSD_UC_MCONTEXT_SS_OFF; break;
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case UNW_X86_EDI: off = FREEBSD_UC_MCONTEXT_EDI_OFF; break;
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case UNW_X86_ESI: off = FREEBSD_UC_MCONTEXT_ESI_OFF; break;
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case UNW_X86_EBP: off = FREEBSD_UC_MCONTEXT_EBP_OFF; break;
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case UNW_X86_ESP: off = FREEBSD_UC_MCONTEXT_ESP_OFF; break;
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case UNW_X86_EBX: off = FREEBSD_UC_MCONTEXT_EBX_OFF; break;
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case UNW_X86_EDX: off = FREEBSD_UC_MCONTEXT_EDX_OFF; break;
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case UNW_X86_ECX: off = FREEBSD_UC_MCONTEXT_ECX_OFF; break;
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case UNW_X86_EAX: off = FREEBSD_UC_MCONTEXT_EAX_OFF; break;
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case UNW_X86_TRAPNO: off = FREEBSD_UC_MCONTEXT_TRAPNO_OFF; break;
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case UNW_X86_EIP: off = FREEBSD_UC_MCONTEXT_EIP_OFF; break;
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case UNW_X86_CS: off = FREEBSD_UC_MCONTEXT_CS_OFF; break;
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case UNW_X86_EFLAGS: off = FREEBSD_UC_MCONTEXT_EFLAGS_OFF; break;
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case UNW_X86_SS: off = FREEBSD_UC_MCONTEXT_SS_OFF; break;
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/* The following is probably not correct for all possible cases.
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Somebody who understands this better should review this for
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correctness. */
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case UNW_X86_FCW: is_fpstate = 1; off = LINUX_FPSTATE_CW_OFF; break;
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case UNW_X86_FSW: is_fpstate = 1; off = LINUX_FPSTATE_SW_OFF; break;
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case UNW_X86_FTW: is_fpstate = 1; off = LINUX_FPSTATE_TAG_OFF; break;
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case UNW_X86_FCS: is_fpstate = 1; off = LINUX_FPSTATE_CSSEL_OFF; break;
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case UNW_X86_FIP: is_fpstate = 1; off = LINUX_FPSTATE_IPOFF_OFF; break;
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case UNW_X86_FEA: is_fpstate = 1; off = LINUX_FPSTATE_DATAOFF_OFF; break;
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case UNW_X86_FDS: is_fpstate = 1; off = LINUX_FPSTATE_DATASEL_OFF; break;
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case UNW_X86_MXCSR: is_fpstate = 1; off = LINUX_FPSTATE_MXCSR_OFF; break;
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/* stacked fp registers */
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case UNW_X86_ST0: case UNW_X86_ST1: case UNW_X86_ST2: case UNW_X86_ST3:
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case UNW_X86_ST4: case UNW_X86_ST5: case UNW_X86_ST6: case UNW_X86_ST7:
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is_fpstate = 1;
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off = LINUX_FPSTATE_ST0_OFF + 10*(reg - UNW_X86_ST0);
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break;
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/* SSE fp registers */
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case UNW_X86_XMM0_lo: case UNW_X86_XMM0_hi:
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case UNW_X86_XMM1_lo: case UNW_X86_XMM1_hi:
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case UNW_X86_XMM2_lo: case UNW_X86_XMM2_hi:
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case UNW_X86_XMM3_lo: case UNW_X86_XMM3_hi:
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case UNW_X86_XMM4_lo: case UNW_X86_XMM4_hi:
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case UNW_X86_XMM5_lo: case UNW_X86_XMM5_hi:
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case UNW_X86_XMM6_lo: case UNW_X86_XMM6_hi:
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case UNW_X86_XMM7_lo: case UNW_X86_XMM7_hi:
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is_fpstate = 1;
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off = LINUX_FPSTATE_XMM0_OFF + 8*(reg - UNW_X86_XMM0_lo);
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break;
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case UNW_X86_XMM0:
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case UNW_X86_XMM1:
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case UNW_X86_XMM2:
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case UNW_X86_XMM3:
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case UNW_X86_XMM4:
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case UNW_X86_XMM5:
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case UNW_X86_XMM6:
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case UNW_X86_XMM7:
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is_fpstate = 1;
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off = LINUX_FPSTATE_XMM0_OFF + 16*(reg - UNW_X86_XMM0);
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break;
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case UNW_X86_FOP:
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case UNW_X86_TSS:
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case UNW_X86_LDT:
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default:
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return DWARF_REG_LOC (&c->dwarf, reg);
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}
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if (is_fpstate)
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{
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if ((ret = dwarf_get (&c->dwarf,
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DWARF_MEM_LOC (&c->dwarf,
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addr + LINUX_SC_FPSTATE_OFF),
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&fpstate_addr)) < 0)
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return DWARF_NULL_LOC;
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if (!fpstate_addr)
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return DWARF_NULL_LOC;
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return DWARF_MEM_LOC (c, fpstate_addr + off);
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}
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else
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return DWARF_MEM_LOC (c, addr + off);
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}
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#else
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#error Port me
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#endif
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HIDDEN dwarf_loc_t
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x86_scratch_loc (struct cursor *c, unw_regnum_t reg)
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{
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if (c->sigcontext_addr)
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return linux_scratch_loc (c, reg);
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return get_scratch_loc (c, reg);
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else
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return DWARF_REG_LOC (&c->dwarf, reg);
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}
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@ -26,6 +26,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include <stdlib.h>
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#include "unwind_i.h"
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#include "offsets.h"
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#ifndef UNW_REMOTE_ONLY
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@ -67,13 +68,16 @@ x86_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
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if (c->sigcontext_format == X86_SCF_NONE) {
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Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip);
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setcontext (uc);
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} else if (c->sigcontext_format == XXX) {
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} else if (c->sigcontext_format == X86_SCF_FREEBSD_SIGFRAME) {
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struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
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Debug (8, "resuming at ip=%x via sigreturn(%p)\n", c->dwarf.ip, sc);
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sigreturn(sc);
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sigreturn((const char *)sc + FREEBSD_UC_MCONTEXT_OFF);
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} else {
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Debug (8, "resuming at ip=%x for sigcontext format %d not implemented\n",
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c->sigcontext_format);
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abort();
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}
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else
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#else
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# warning Implement me!
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#endif
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@ -23,6 +23,17 @@ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/types.h>
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#include <signal.h>
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#ifdef __FreeBSD__
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#include <ucontext.h>
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#include <machine/sigframe.h>
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#endif
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#include "unwind_i.h"
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#include "offsets.h"
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@ -30,7 +41,7 @@ PROTECTED int
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unw_step (unw_cursor_t *cursor)
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{
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struct cursor *c = (struct cursor *) cursor;
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int ret, i;
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int ret, i, format;
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Debug (1, "(cursor=%p, ip=0x%08x)\n", c, (unsigned) c->dwarf.ip);
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@ -55,8 +66,10 @@ unw_step (unw_cursor_t *cursor)
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Debug (13, "dwarf_step() failed (ret=%d), trying frame-chain\n", ret);
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if (unw_is_signal_frame (cursor))
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format = unw_is_signal_frame (cursor);
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if (format != X86_SCF_NONE)
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{
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#if defined __linux__
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/* XXX This code is Linux-specific! */
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/* c->esp points at the arguments to the handler. Without
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@ -119,6 +132,51 @@ unw_step (unw_cursor_t *cursor)
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c->dwarf.loc[EFLAGS] = DWARF_NULL_LOC;
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c->dwarf.loc[TRAPNO] = DWARF_NULL_LOC;
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c->dwarf.loc[ST0] = DWARF_NULL_LOC;
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#elif defined __FreeBSD__
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if (format == X86_SCF_FREEBSD_SIGFRAME) {
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struct sigframe *sf;
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uintptr_t uc_addr;
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struct dwarf_loc esp_loc;
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sf = (struct sigframe *)c->dwarf.cfa;
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uc_addr = (uintptr_t)&(sf->sf_uc);
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esp_loc = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_ESP_OFF, 0);
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ret = dwarf_get (&c->dwarf, esp_loc, &c->dwarf.cfa);
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if (ret < 0)
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{
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Debug (2, "returning 0\n");
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return 0;
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}
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ebp_loc = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_EBP_OFF, 0);
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eip_loc = DWARF_LOC (uc_addr + FREEBSD_UC_MCONTEXT_EIP_OFF, 0);
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c->dwarf.loc[EAX] = DWARF_LOC (uc_addr +
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FREEBSD_UC_MCONTEXT_EAX_OFF, 0);
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c->dwarf.loc[ECX] = DWARF_LOC (uc_addr +
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FREEBSD_UC_MCONTEXT_ECX_OFF, 0);
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c->dwarf.loc[EDX] = DWARF_LOC (uc_addr +
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FREEBSD_UC_MCONTEXT_EDX_OFF, 0);
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c->dwarf.loc[EBX] = DWARF_LOC (uc_addr +
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FREEBSD_UC_MCONTEXT_EBX_OFF, 0);
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c->dwarf.loc[EBP] = DWARF_LOC (uc_addr +
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FREEBSD_UC_MCONTEXT_EBP_OFF, 0);
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c->dwarf.loc[ESI] = DWARF_LOC (uc_addr +
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FREEBSD_UC_MCONTEXT_ESI_OFF, 0);
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c->dwarf.loc[EDI] = DWARF_LOC (uc_addr +
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FREEBSD_UC_MCONTEXT_EDI_OFF, 0);
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c->dwarf.loc[EFLAGS] = DWARF_LOC (uc_addr +
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FREEBSD_UC_MCONTEXT_EFLAGS_OFF, 0);
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c->dwarf.loc[TRAPNO] = DWARF_LOC (uc_addr +
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FREEBSD_UC_MCONTEXT_EFLAGS_OFF, 0);
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c->dwarf.loc[ST0] = DWARF_NULL_LOC;
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} else {
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Debug (8, "Gstep: not handling frame format %d\n", format);
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abort();
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}
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#else
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#error Port me
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#endif
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}
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else
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{
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@ -76,37 +76,41 @@ _Ux86_getcontext:
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movl %ebp, FREEBSD_UC_MCONTEXT_EBP_OFF(%eax)
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movl (%esp), %ecx
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movl %ecx, FREEBSD_UC_MCONTEXT_OFF_EIP(%eax)
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movl %ecx, FREEBSD_UC_MCONTEXT_EIP_OFF(%eax)
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leal 4(%esp), %ecx /* Exclude the return address. */
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movl %ecx, FREEBSD_UC_MCONTEXT_OFF_ESP(%eax)
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movl %ecx, FREEBSD_UC_MCONTEXT_ESP_OFF(%eax)
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xorl %ecx, %ecx
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movw %fs, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_OFF_FS(%eax)
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movl %ecx, FREEBSD_UC_MCONTEXT_FS_OFF(%eax)
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movw %gs, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_OFF_GS(%eax)
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movl %ecx, FREEBSD_UC_MCONTEXT_GS_OFF(%eax)
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movw %ds, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_OFF_DS(%eax)
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movl %ecx, FREEBSD_UC_MCONTEXT_DS_OFF(%eax)
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movw %es, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_OFF_ES(%eax)
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movl %ecx, FREEBSD_UC_MCONTEXT_ES_OFF(%eax)
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movw %ss, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_OFF_SS(%eax)
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movl %ecx, FREEBSD_UC_MCONTEXT_SS_OFF(%eax)
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movw %cs, %cx
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movl %ecx, FREEBSD_UC_MCONTEXT_OFF_CS(%eax)
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movl %ecx, FREEBSD_UC_MCONTEXT_CS_OFF(%eax)
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pushfl
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popl FREEBSD_UC_MCONTEXT_OFF_EFLAGS(%eax)
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movl $FREEBSD_UC_MCONTEXT_FPOWNED_FPU,FREEBSD_UC_MCONTEXT_OWNEDFP(%eax)
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movl $FREEBSD_UC_MCONTEXT_FPFMT_XMM,FREEBSD_UC_MCONTEXT_FPFORMAT(%eax)
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popl FREEBSD_UC_MCONTEXT_EFLAGS_OFF(%eax)
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movl $0, FREEBSD_UC_MCONTEXT_TRAPNO_OFF(%eax)
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movl $FREEBSD_UC_MCONTEXT_FPOWNED_FPU,\
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FREEBSD_UC_MCONTEXT_OWNEDFP_OFF(%eax)
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movl $FREEBSD_UC_MCONTEXT_FPFMT_XMM,\
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FREEBSD_UC_MCONTEXT_FPFORMAT_OFF(%eax)
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/*
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leal LINUX_UC_FPREGS_MEM_OFF(%eax), %ecx
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movl %ecx, (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FPSTATE_OFF)(%eax)
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fnstenv (%ecx)
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fldenv (%ecx)
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movl $FREEBSD_UC_MCONTEXT_MC_LEN_VAL, FREEBSD_UC_MCONTEXT_MC_LEN(%eax)
|
||||
*/
|
||||
movl $FREEBSD_UC_MCONTEXT_MC_LEN_VAL,\
|
||||
FREEBSD_UC_MCONTEXT_MC_LEN_OFF(%eax)
|
||||
#endif
|
||||
|
||||
xor %eax, %eax
|
||||
|
|
|
|||
|
|
@ -83,6 +83,9 @@
|
|||
#define LINUX_FPSTATE_XMM6_OFF 0x170
|
||||
#define LINUX_FPSTATE_XMM7_OFF 0x180
|
||||
|
||||
#define FREEBSD_SC_UCONTEXT_OFF 0x14
|
||||
#define FREEBSD_UC_MCONTEXT_OFF 0x10
|
||||
|
||||
#define FREEBSD_UC_MCONTEXT_EAX_OFF 0x40
|
||||
#define FREEBSD_UC_MCONTEXT_EBX_OFF 0x34
|
||||
#define FREEBSD_UC_MCONTEXT_ECX_OFF 0x3c
|
||||
|
|
@ -90,19 +93,20 @@
|
|||
#define FREEBSD_UC_MCONTEXT_EDI_OFF 0x24
|
||||
#define FREEBSD_UC_MCONTEXT_ESI_OFF 0x28
|
||||
#define FREEBSD_UC_MCONTEXT_EBP_OFF 0x2c
|
||||
#define FREEBSD_UC_MCONTEXT_OFF_EIP 0x4c
|
||||
#define FREEBSD_UC_MCONTEXT_OFF_ESP 0x58
|
||||
#define FREEBSD_UC_MCONTEXT_OFF_FS 0x18
|
||||
#define FREEBSD_UC_MCONTEXT_OFF_GS 0x14
|
||||
#define FREEBSD_UC_MCONTEXT_OFF_DS 0x20
|
||||
#define FREEBSD_UC_MCONTEXT_OFF_ES 0x1c
|
||||
#define FREEBSD_UC_MCONTEXT_OFF_SS 0x5c
|
||||
#define FREEBSD_UC_MCONTEXT_OFF_CS 0x50
|
||||
#define FREEBSD_UC_MCONTEXT_OFF_EFLAGS 0x54
|
||||
#define FREEBSD_UC_MCONTEXT_OWNEDFP 0x68
|
||||
#define FREEBSD_UC_MCONTEXT_FPFORMAT 0x64
|
||||
#define FREEBSD_UC_MCONTEXT_FPSTATE 0x70
|
||||
#define FREEBSD_UC_MCONTEXT_MC_LEN 0x60
|
||||
#define FREEBSD_UC_MCONTEXT_EIP_OFF 0x4c
|
||||
#define FREEBSD_UC_MCONTEXT_ESP_OFF 0x58
|
||||
#define FREEBSD_UC_MCONTEXT_FS_OFF 0x18
|
||||
#define FREEBSD_UC_MCONTEXT_GS_OFF 0x14
|
||||
#define FREEBSD_UC_MCONTEXT_DS_OFF 0x20
|
||||
#define FREEBSD_UC_MCONTEXT_ES_OFF 0x1c
|
||||
#define FREEBSD_UC_MCONTEXT_SS_OFF 0x5c
|
||||
#define FREEBSD_UC_MCONTEXT_CS_OFF 0x50
|
||||
#define FREEBSD_UC_MCONTEXT_EFLAGS_OFF 0x54
|
||||
#define FREEBSD_UC_MCONTEXT_OWNEDFP_OFF 0x68
|
||||
#define FREEBSD_UC_MCONTEXT_FPFORMAT_OFF 0x64
|
||||
#define FREEBSD_UC_MCONTEXT_FPSTATE_OFF 0x70
|
||||
#define FREEBSD_UC_MCONTEXT_MC_LEN_OFF 0x60
|
||||
#define FREEBSD_UC_MCONTEXT_TRAPNO_OFF 0x44
|
||||
|
||||
#define FREEBSD_UC_MCONTEXT_MC_LEN_VAL 0x280
|
||||
#define FREEBSD_UC_MCONTEXT_FPOWNED_FPU 0x20001
|
||||
|
|
|
|||
Loading…
Reference in a new issue