From a830225adbb77073272961df409885cca6b861ee Mon Sep 17 00:00:00 2001 From: Glenn Kennard Date: Thu, 27 Aug 2015 19:04:16 +0200 Subject: [PATCH] r600g/sb: Don't read junk after EOP Shaders that contain instruction data after an instruction with EOP could end up parsing that as an instruction, leading to various crashes and asserts in SB as it gets very confused if it sees for instance a loop start instruction jumping off to some random point. Add a couple of asserts, and print EOP bit if set in old asm printer. Signed-off-by: Glenn Kennard Cc: Signed-off-by: Dave Airlie --- src/gallium/drivers/r600/r600_asm.c | 2 ++ src/gallium/drivers/r600/sb/sb_bc_decoder.cpp | 1 + src/gallium/drivers/r600/sb/sb_bc_parser.cpp | 4 +++- 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/src/gallium/drivers/r600/r600_asm.c b/src/gallium/drivers/r600/r600_asm.c index 762cc7fac44..b514c58f9d8 100644 --- a/src/gallium/drivers/r600/r600_asm.c +++ b/src/gallium/drivers/r600/r600_asm.c @@ -2029,6 +2029,8 @@ void r600_bytecode_disasm(struct r600_bytecode *bc) fprintf(stderr, "CND:%X ", cf->cond); if (cf->pop_count) fprintf(stderr, "POP:%X ", cf->pop_count); + if (cf->end_of_program) + fprintf(stderr, "EOP "); fprintf(stderr, "\n"); } } diff --git a/src/gallium/drivers/r600/sb/sb_bc_decoder.cpp b/src/gallium/drivers/r600/sb/sb_bc_decoder.cpp index 5e233f982ea..5fe8f50aa4c 100644 --- a/src/gallium/drivers/r600/sb/sb_bc_decoder.cpp +++ b/src/gallium/drivers/r600/sb/sb_bc_decoder.cpp @@ -32,6 +32,7 @@ int bc_decoder::decode_cf(unsigned &i, bc_cf& bc) { int r = 0; uint32_t dw0 = dw[i]; uint32_t dw1 = dw[i+1]; + assert(i+1 <= ndw); if ((dw1 >> 29) & 1) { // CF_ALU return decode_cf_alu(i, bc); diff --git a/src/gallium/drivers/r600/sb/sb_bc_parser.cpp b/src/gallium/drivers/r600/sb/sb_bc_parser.cpp index 4879c036f9f..748aae29eeb 100644 --- a/src/gallium/drivers/r600/sb/sb_bc_parser.cpp +++ b/src/gallium/drivers/r600/sb/sb_bc_parser.cpp @@ -95,7 +95,7 @@ int bc_parser::decode_shader() { if ((r = decode_cf(i, eop))) return r; - } while (!eop || (i >> 1) <= max_cf); + } while (!eop || (i >> 1) < max_cf); return 0; } @@ -769,6 +769,7 @@ int bc_parser::prepare_ir() { } int bc_parser::prepare_loop(cf_node* c) { + assert(c->bc.addr-1 < cf_map.size()); cf_node *end = cf_map[c->bc.addr - 1]; assert(end->bc.op == CF_OP_LOOP_END); @@ -788,6 +789,7 @@ int bc_parser::prepare_loop(cf_node* c) { } int bc_parser::prepare_if(cf_node* c) { + assert(c->bc.addr-1 < cf_map.size()); cf_node *c_else = NULL, *end = cf_map[c->bc.addr]; BCP_DUMP( -- 2.11.0