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Diffstat (limited to 'gcc/config/rs6000/darwin-fallback.c')
-rw-r--r--gcc/config/rs6000/darwin-fallback.c115
1 files changed, 77 insertions, 38 deletions
diff --git a/gcc/config/rs6000/darwin-fallback.c b/gcc/config/rs6000/darwin-fallback.c
index a9ef4a7985e..0815a2a8fdb 100644
--- a/gcc/config/rs6000/darwin-fallback.c
+++ b/gcc/config/rs6000/darwin-fallback.c
@@ -1,3 +1,4 @@
+/* APPLE LOCAL file mainline 2005-03-25 3941951 */
/* Fallback frame-state unwinder for Darwin.
Copyright (C) 2004, 2005 Free Software Foundation, Inc.
@@ -36,9 +37,8 @@
#include "unwind-dw2.h"
#include <stdint.h>
#include <stdbool.h>
+#include <sys/types.h>
#include <signal.h>
-#include <ucontext.h>
-#include <mach/thread_status.h>
typedef unsigned long reg_unit;
@@ -225,6 +225,11 @@ interpret_libc (reg_unit gprs[32], struct _Unwind_Context *context)
}
}
+/* We used to include <ucontext.h> and <mach/thread_status.h>,
+ but they change so much between different Darwin system versions
+ that it's much easier to just write the structures involved here
+ directly. */
+
/* These defines are from the kernel's bsd/dev/ppc/unix_signal.c. */
#define UC_TRAD 1
#define UC_TRAD_VEC 6
@@ -237,6 +242,44 @@ interpret_libc (reg_unit gprs[32], struct _Unwind_Context *context)
#define UC_DUAL 50
#define UC_DUAL_VEC 55
+struct gcc_ucontext
+{
+ int onstack;
+ sigset_t sigmask;
+ void * stack_sp;
+ size_t stack_sz;
+ int stack_flags;
+ struct gcc_ucontext *link;
+ size_t mcsize;
+ struct gcc_mcontext32 *mcontext;
+};
+
+struct gcc_float_vector_state
+{
+ double fpregs[32];
+ uint32_t fpscr_pad;
+ uint32_t fpscr;
+ uint32_t save_vr[32][4];
+ uint32_t save_vscr[4];
+};
+
+struct gcc_mcontext32 {
+ uint32_t dar;
+ uint32_t dsisr;
+ uint32_t exception;
+ uint32_t padding1[5];
+ uint32_t srr0;
+ uint32_t srr1;
+ uint32_t gpr[32];
+ uint32_t cr;
+ uint32_t xer;
+ uint32_t lr;
+ uint32_t ctr;
+ uint32_t mq;
+ uint32_t vrsave;
+ struct gcc_float_vector_state fvs;
+};
+
/* These are based on /usr/include/ppc/ucontext.h and
/usr/include/mach/ppc/thread_status.h, but rewritten to be more
convenient, to compile on Jaguar, and to work around Radar 3712064
@@ -256,17 +299,16 @@ struct gcc_mcontext64 {
uint32_t lr[2];
uint32_t ctr[2];
uint32_t vrsave;
- ppc_float_state_t fs;
- ppc_vector_state_t vs;
+ struct gcc_float_vector_state fvs;
};
#define UC_FLAVOR_SIZE \
- (sizeof (struct mcontext) - sizeof (ppc_vector_state_t))
+ (sizeof (struct gcc_mcontext32) - 33*16)
-#define UC_FLAVOR_VEC_SIZE (sizeof (struct mcontext))
+#define UC_FLAVOR_VEC_SIZE (sizeof (struct gcc_mcontext32))
#define UC_FLAVOR64_SIZE \
- (sizeof (struct gcc_mcontext64) - sizeof (ppc_vector_state_t))
+ (sizeof (struct gcc_mcontext64) - 33*16)
#define UC_FLAVOR64_VEC_SIZE (sizeof (struct gcc_mcontext64))
@@ -278,10 +320,9 @@ static bool
handle_syscall (_Unwind_FrameState *fs, const reg_unit gprs[32],
_Unwind_Ptr old_cfa)
{
- ucontext_t *uctx;
+ struct gcc_ucontext *uctx;
bool is_64, is_vector;
- ppc_float_state_t *float_state;
- ppc_vector_state_t *vector_state;
+ struct gcc_float_vector_state * float_vector_state;
_Unwind_Ptr new_cfa;
int i;
static _Unwind_Ptr return_addr;
@@ -293,16 +334,16 @@ handle_syscall (_Unwind_FrameState *fs, const reg_unit gprs[32],
if (gprs[0] == 0x67 /* SYS_SIGRETURN */)
{
- uctx = (ucontext_t *) gprs[3];
- is_vector = (uctx->uc_mcsize == UC_FLAVOR64_VEC_SIZE
- || uctx->uc_mcsize == UC_FLAVOR_VEC_SIZE);
- is_64 = (uctx->uc_mcsize == UC_FLAVOR64_VEC_SIZE
- || uctx->uc_mcsize == UC_FLAVOR64_SIZE);
+ uctx = (struct gcc_ucontext *) gprs[3];
+ is_vector = (uctx->mcsize == UC_FLAVOR64_VEC_SIZE
+ || uctx->mcsize == UC_FLAVOR_VEC_SIZE);
+ is_64 = (uctx->mcsize == UC_FLAVOR64_VEC_SIZE
+ || uctx->mcsize == UC_FLAVOR64_SIZE);
}
else if (gprs[0] == 0 && gprs[3] == 184)
{
int ctxstyle = gprs[5];
- uctx = (ucontext_t *) gprs[4];
+ uctx = (struct gcc_ucontext *) gprs[4];
is_vector = (ctxstyle == UC_FLAVOR_VEC || ctxstyle == UC_FLAVOR64_VEC
|| ctxstyle == UC_TRAD_VEC || ctxstyle == UC_TRAD64_VEC);
is_64 = (ctxstyle == UC_FLAVOR64_VEC || ctxstyle == UC_TRAD64_VEC
@@ -325,11 +366,10 @@ handle_syscall (_Unwind_FrameState *fs, const reg_unit gprs[32],
/* The context is 64-bit, but it doesn't carry any extra information
for us because only the low 32 bits of the registers are
call-saved. */
- struct gcc_mcontext64 *m64 = (struct gcc_mcontext64 *)uctx->uc_mcontext;
+ struct gcc_mcontext64 *m64 = (struct gcc_mcontext64 *)uctx->mcontext;
int i;
- float_state = &m64->fs;
- vector_state = &m64->vs;
+ float_vector_state = &m64->fvs;
new_cfa = m64->gpr[1][1];
@@ -354,33 +394,32 @@ handle_syscall (_Unwind_FrameState *fs, const reg_unit gprs[32],
}
else
{
- struct mcontext *m = uctx->uc_mcontext;
+ struct gcc_mcontext32 *m = uctx->mcontext;
int i;
- float_state = &m->fs;
- vector_state = &m->vs;
+ float_vector_state = &m->fvs;
- new_cfa = m->ss.r1;
+ new_cfa = m->gpr[1];
- set_offset (CR2_REGNO, &m->ss.cr);
+ set_offset (CR2_REGNO, &m->cr);
for (i = 0; i < 32; i++)
- set_offset (i, &m->ss.r0 + i);
- set_offset (XER_REGNO, &m->ss.xer);
- set_offset (LINK_REGISTER_REGNUM, &m->ss.lr);
- set_offset (COUNT_REGISTER_REGNUM, &m->ss.ctr);
+ set_offset (i, m->gpr + i);
+ set_offset (XER_REGNO, &m->xer);
+ set_offset (LINK_REGISTER_REGNUM, &m->lr);
+ set_offset (COUNT_REGISTER_REGNUM, &m->ctr);
if (is_vector)
- set_offset (VRSAVE_REGNO, &m->ss.vrsave);
+ set_offset (VRSAVE_REGNO, &m->vrsave);
/* Sometimes, srr0 points to the instruction that caused the exception,
and sometimes to the next instruction to be executed; we want
the latter. */
- if (m->es.exception == 3 || m->es.exception == 4
- || m->es.exception == 6
- || (m->es.exception == 7 && !(m->ss.srr1 & 0x10000)))
- return_addr = m->ss.srr0 + 4;
+ if (m->exception == 3 || m->exception == 4
+ || m->exception == 6
+ || (m->exception == 7 && !(m->srr1 & 0x10000)))
+ return_addr = m->srr0 + 4;
else
- return_addr = m->ss.srr0;
+ return_addr = m->srr0;
}
fs->cfa_how = CFA_REG_OFFSET;
@@ -399,14 +438,14 @@ handle_syscall (_Unwind_FrameState *fs, const reg_unit gprs[32],
set_offset (ARG_POINTER_REGNUM, &return_addr);
for (i = 0; i < 32; i++)
- set_offset (32 + i, float_state->fpregs + i);
- set_offset (SPEFSCR_REGNO, &float_state->fpscr);
+ set_offset (32 + i, float_vector_state->fpregs + i);
+ set_offset (SPEFSCR_REGNO, &float_vector_state->fpscr);
if (is_vector)
{
for (i = 0; i < 32; i++)
- set_offset (FIRST_ALTIVEC_REGNO + i, vector_state->save_vr + i);
- set_offset (VSCR_REGNO, vector_state->save_vscr);
+ set_offset (FIRST_ALTIVEC_REGNO + i, float_vector_state->save_vr + i);
+ set_offset (VSCR_REGNO, float_vector_state->save_vscr);
}
return true;
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