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Solaris/SPARC support for SIGSEGV_FAULT_INSTRUCTION

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This commit is contained in:
gbeauche 2003-10-21 21:59:41 +00:00
parent ccf89d9efb
commit f8a0f363ea
1 changed files with 60 additions and 18 deletions
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78
BasiliskII/src/Unix/sigsegv.cpp
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@ -221,6 +221,13 @@ static void powerpc_decode_instruction(instruction_t *instruction, unsigned int
#define SIGSEGV_FAULT_HANDLER_ARGLIST_1 siginfo_t *sip, void *scp
#define SIGSEGV_FAULT_HANDLER_ARGS sip, scp
#define SIGSEGV_FAULT_ADDRESS sip->si_addr
#if defined(__sun__)
#if (defined(sparc) || defined(__sparc__))
#include <sys/ucontext.h>
#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[REG_PC]
#endif
#endif
#if defined(__NetBSD__) || defined(__FreeBSD__)
#if (defined(i386) || defined(__i386__))
#define SIGSEGV_FAULT_INSTRUCTION (((struct sigcontext *)scp)->sc_eip)
@ -1192,26 +1199,37 @@ void sigsegv_set_dump_state(sigsegv_state_dumper_t handler)
#include <sys/mman.h>
#include "vm_alloc.h"
const int REF_INDEX = 123;
const int REF_VALUE = 45;
static int page_size;
static volatile char * page = 0;
static volatile int handler_called = 0;
static sigsegv_return_t sigsegv_test_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
{
handler_called++;
if ((fault_address - 123) != page)
exit(10);
if (vm_protect((char *)((unsigned long)fault_address & -page_size), page_size, VM_PAGE_READ | VM_PAGE_WRITE) != 0)
exit(11);
return SIGSEGV_RETURN_SUCCESS;
}
#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
#ifdef __GNUC__
// Code range where we expect the fault to come from
static void *b_region, *e_region;
#endif
static sigsegv_return_t sigsegv_test_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
{
handler_called++;
if ((fault_address - REF_INDEX) != page)
exit(10);
#ifdef __GNUC__
// Make sure reported fault instruction address falls into
// expected code range
if (instruction_address != SIGSEGV_INVALID_PC
&& ((instruction_address < (sigsegv_address_t)b_region) ||
(instruction_address >= (sigsegv_address_t)e_region)))
exit(11);
#endif
if (vm_protect((char *)((unsigned long)fault_address & -page_size), page_size, VM_PAGE_READ | VM_PAGE_WRITE) != 0)
exit(12);
return SIGSEGV_RETURN_SUCCESS;
}
#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
static sigsegv_return_t sigsegv_insn_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
{
if (((unsigned long)fault_address - (unsigned long)page) < page_size) {
@ -1239,15 +1257,24 @@ int main(void)
if ((page = (char *)vm_acquire(page_size)) == VM_MAP_FAILED)
return 2;
memset((void *)page, 0, page_size);
if (vm_protect((char *)page, page_size, VM_PAGE_READ) < 0)
return 3;
if (!sigsegv_install_handler(sigsegv_test_handler))
return 4;
page[123] = 45;
page[123] = 45;
#ifdef __GNUC__
b_region = &&L_b_region1;
e_region = &&L_e_region1;
#endif
L_b_region1:
page[REF_INDEX] = REF_VALUE;
if (page[REF_INDEX] != REF_VALUE)
exit(20);
page[REF_INDEX] = REF_VALUE;
L_e_region1:
if (handler_called != 1)
return 5;
@ -1273,17 +1300,32 @@ int main(void)
} while (0)
#ifdef __GNUC__
b_region = &&L_b_region;
e_region = &&L_e_region;
b_region = &&L_b_region2;
e_region = &&L_e_region2;
#endif
L_b_region:
L_b_region2:
TEST_SKIP_INSTRUCTION(unsigned char);
TEST_SKIP_INSTRUCTION(unsigned short);
TEST_SKIP_INSTRUCTION(unsigned int);
L_e_region:
L_e_region2:
#endif
vm_exit();
return 0;
}
#endif